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authorSteffen Pingel2012-02-12 12:49:31 +0000
committerSteffen Pingel2012-02-12 12:49:31 +0000
commit1ffa3ec748a3ae36d799a55787aac0ddbffbbf10 (patch)
treefa1a053b70f7c3b3c4cb909b7633d3ae0a74af03 /org.eclipse.mylyn.tasks.index.core/src
parent23afd2a8112c4fb5d77f961aa1814a57c1840f93 (diff)
downloadorg.eclipse.mylyn.tasks-1ffa3ec748a3ae36d799a55787aac0ddbffbbf10.tar.gz
org.eclipse.mylyn.tasks-1ffa3ec748a3ae36d799a55787aac0ddbffbbf10.tar.xz
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RESOLVED - bug 356790: configure all projects for Unix file endings
https://bugs.eclipse.org/bugs/show_bug.cgi?id=356790
Diffstat (limited to 'org.eclipse.mylyn.tasks.index.core/src')
-rw-r--r--org.eclipse.mylyn.tasks.index.core/src/org/eclipse/mylyn/internal/tasks/index/core/TaskListIndex.java2404
1 files changed, 1202 insertions, 1202 deletions
diff --git a/org.eclipse.mylyn.tasks.index.core/src/org/eclipse/mylyn/internal/tasks/index/core/TaskListIndex.java b/org.eclipse.mylyn.tasks.index.core/src/org/eclipse/mylyn/internal/tasks/index/core/TaskListIndex.java
index cdefbfdbf..0d903eb97 100644
--- a/org.eclipse.mylyn.tasks.index.core/src/org/eclipse/mylyn/internal/tasks/index/core/TaskListIndex.java
+++ b/org.eclipse.mylyn.tasks.index.core/src/org/eclipse/mylyn/internal/tasks/index/core/TaskListIndex.java
@@ -1,1202 +1,1202 @@
-/*******************************************************************************
- * Copyright (c) 2011, 2012 Tasktop Technologies.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/epl-v10.html
- *
- * Contributors:
- * Tasktop Technologies - initial API and implementation
- *******************************************************************************/
-
-package org.eclipse.mylyn.internal.tasks.index.core;
-
-import static org.eclipse.mylyn.tasks.core.data.TaskAttribute.META_INDEXED_AS_CONTENT;
-
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-import java.util.concurrent.locks.Lock;
-import java.util.concurrent.locks.ReadWriteLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
-import java.util.logging.Logger;
-
-import org.apache.lucene.document.DateTools;
-import org.apache.lucene.document.DateTools.Resolution;
-import org.apache.lucene.document.Document;
-import org.apache.lucene.document.Field;
-import org.apache.lucene.document.Field.Store;
-import org.apache.lucene.index.CorruptIndexException;
-import org.apache.lucene.index.IndexReader;
-import org.apache.lucene.index.IndexWriter;
-import org.apache.lucene.index.Term;
-import org.apache.lucene.queryParser.ParseException;
-import org.apache.lucene.queryParser.QueryParser;
-import org.apache.lucene.search.BooleanClause;
-import org.apache.lucene.search.BooleanClause.Occur;
-import org.apache.lucene.search.BooleanQuery;
-import org.apache.lucene.search.IndexSearcher;
-import org.apache.lucene.search.PrefixQuery;
-import org.apache.lucene.search.Query;
-import org.apache.lucene.search.ScoreDoc;
-import org.apache.lucene.search.TermQuery;
-import org.apache.lucene.search.TopDocs;
-import org.apache.lucene.store.Directory;
-import org.apache.lucene.store.LockObtainFailedException;
-import org.apache.lucene.store.NIOFSDirectory;
-import org.apache.lucene.util.Version;
-import org.eclipse.core.runtime.Assert;
-import org.eclipse.core.runtime.CoreException;
-import org.eclipse.core.runtime.IProgressMonitor;
-import org.eclipse.core.runtime.IStatus;
-import org.eclipse.core.runtime.MultiStatus;
-import org.eclipse.core.runtime.NullProgressMonitor;
-import org.eclipse.core.runtime.Platform;
-import org.eclipse.core.runtime.Status;
-import org.eclipse.core.runtime.SubMonitor;
-import org.eclipse.core.runtime.jobs.Job;
-import org.eclipse.mylyn.commons.core.StatusHandler;
-import org.eclipse.mylyn.internal.tasks.core.AbstractTask;
-import org.eclipse.mylyn.internal.tasks.core.ITaskList;
-import org.eclipse.mylyn.internal.tasks.core.ITaskListChangeListener;
-import org.eclipse.mylyn.internal.tasks.core.ITaskListRunnable;
-import org.eclipse.mylyn.internal.tasks.core.TaskComment;
-import org.eclipse.mylyn.internal.tasks.core.TaskContainerDelta;
-import org.eclipse.mylyn.internal.tasks.core.TaskList;
-import org.eclipse.mylyn.internal.tasks.core.data.ITaskDataManagerListener;
-import org.eclipse.mylyn.internal.tasks.core.data.TaskDataManager;
-import org.eclipse.mylyn.internal.tasks.core.data.TaskDataManagerEvent;
-import org.eclipse.mylyn.tasks.core.IRepositoryElement;
-import org.eclipse.mylyn.tasks.core.IRepositoryListener;
-import org.eclipse.mylyn.tasks.core.IRepositoryManager;
-import org.eclipse.mylyn.tasks.core.IRepositoryPerson;
-import org.eclipse.mylyn.tasks.core.ITask;
-import org.eclipse.mylyn.tasks.core.TaskRepository;
-import org.eclipse.mylyn.tasks.core.data.AbstractTaskSchema;
-import org.eclipse.mylyn.tasks.core.data.DefaultTaskSchema;
-import org.eclipse.mylyn.tasks.core.data.ITaskDataManager;
-import org.eclipse.mylyn.tasks.core.data.TaskAttribute;
-import org.eclipse.mylyn.tasks.core.data.TaskData;
-
-/**
- * An index on a task list, provides a way to {@link #find(String, TaskCollector, int) search for tasks}, and a way to
- * {@link #matches(ITask, String) match tasks}. Tasks are matched against a search query.
- * <p>
- * The task list has a configurable delay before it updates, meaning that there is a period of time where the index will
- * be out of date with respect to task changes. The idea is that updates to the index can be "batched" for greater
- * efficiency. Additionally, it's possible for a task to be updated either before or after the index is added to the
- * task list as a listener, thus opening the possibility of changes without updates to the index. In either of these
- * cases, the index can be out of date with respect to the current state of tasks. If the index is used in such a state,
- * the result could be either false matches, no match where there should be a match, or incorrect prioritization of
- * index "hits".
- * </p>
- * <p>
- * The index has the option of reindexing all tasks via API. This will bring the index up to date and is useful for
- * cases where it's known that the index may not be up to date. In its current form this reindex operation can be
- * triggered by the user by including "index:reset" in the search string. Reindexing is potentially an expensive, IO
- * intensive long-running operation. With about 20,000 tasks in my task list and an SSD, reindexing takes about 90
- * seconds.
- * </p>
- *
- * @author David Green
- */
-public class TaskListIndex implements ITaskDataManagerListener, ITaskListChangeListener, IRepositoryListener {
-
- private class MaintainIndexJob extends Job {
-
- public MaintainIndexJob() {
- super(Messages.TaskListIndex_indexerJob);
- setUser(false);
- setSystem(false); // true?
- setPriority(Job.LONG);
- }
-
- @Override
- public IStatus run(IProgressMonitor m) {
- if (m.isCanceled()) {
- return Status.CANCEL_STATUS;
- }
- try {
- maintainIndex(m);
- } catch (CoreException e) {
- MultiStatus logStatus = new MultiStatus(TasksIndexCore.ID_PLUGIN, 0,
- "Failed to update task list index", e); //$NON-NLS-1$
- logStatus.add(e.getStatus());
- StatusHandler.log(logStatus);
- }
- return Status.OK_STATUS;
- }
-
- }
-
- public abstract static class TaskCollector {
-
- public abstract void collect(ITask task);
-
- }
-
- private static final Object COMMAND_RESET_INDEX = "index:reset"; //$NON-NLS-1$
-
- public static enum IndexField {
- IDENTIFIER(false, null, TaskAttribute.TYPE_SHORT_TEXT), //
- TASK_KEY(false, DefaultTaskSchema.getInstance().TASK_KEY), //
- REPOSITORY_URL(false, null, TaskAttribute.TYPE_URL), //
- SUMMARY(true, DefaultTaskSchema.getInstance().SUMMARY), //
- CONTENT(true, null, TaskAttribute.TYPE_LONG_TEXT), //
- ASSIGNEE(true, DefaultTaskSchema.getInstance().USER_ASSIGNED), //
- REPORTER(true, DefaultTaskSchema.getInstance().USER_REPORTER), //
- PERSON(true, null, TaskAttribute.TYPE_PERSON), //
- COMPONENT(true, DefaultTaskSchema.getInstance().COMPONENT), //
- COMPLETION_DATE(true, DefaultTaskSchema.getInstance().DATE_COMPLETION), //
- CREATION_DATE(true, DefaultTaskSchema.getInstance().DATE_CREATION), //
- DUE_DATE(true, DefaultTaskSchema.getInstance().DATE_DUE), //
- MODIFICATION_DATE(true, DefaultTaskSchema.getInstance().DATE_MODIFICATION), //
- DESCRIPTION(true, DefaultTaskSchema.getInstance().DESCRIPTION), //
- KEYWORDS(true, DefaultTaskSchema.getInstance().KEYWORDS), //
- PRODUCT(true, DefaultTaskSchema.getInstance().PRODUCT), //
- RESOLUTION(true, DefaultTaskSchema.getInstance().RESOLUTION), //
- SEVERITY(true, DefaultTaskSchema.getInstance().SEVERITY), //
- STATUS(true, DefaultTaskSchema.getInstance().STATUS);
-
- private final String attributeId;
-
- private final String type;
-
- private final boolean userVisible;
-
- private IndexField(boolean userVisible, AbstractTaskSchema.Field field) {
- this(userVisible, field.getKey(), field.getType());
- }
-
- private IndexField(boolean userVisible, String attributeId, String type) {
- this.userVisible = userVisible;
- this.attributeId = attributeId;
- this.type = type;
- }
-
- public String fieldName() {
- return name().toLowerCase();
- }
-
- /**
- * get the task attribute id, or null if this field has special handling
- */
- public String getAttributeId() {
- return attributeId;
- }
-
- /**
- * indicate if the field should be exposed in the UI
- */
- public boolean isUserVisible() {
- return userVisible;
- }
-
- /**
- * the type of field, as it relates to <code>TaskAttribute.TYPE_*</code>
- */
- public String getType() {
- return type;
- }
-
- /**
- * indicate if the field is a date or date/time field
- */
- public boolean isTypeDate() {
- return type != null && (TaskAttribute.TYPE_DATE.equals(type) || TaskAttribute.TYPE_DATETIME.equals(type));
- }
-
- /**
- * indicate if this is a person field
- */
- public boolean isPersonField() {
- return type != null && (TaskAttribute.TYPE_PERSON.equals(type) || TaskAttribute.TYPE_PERSON.equals(type));
- }
-
- public static IndexField fromFieldName(String fieldName) {
- try {
- return IndexField.valueOf(fieldName.toUpperCase());
- } catch (IllegalArgumentException e) {
- return null;
- }
- }
-
- }
-
- private static enum MaintainIndexType {
- STARTUP, REINDEX
- }
-
- // FIXME: document concurrency model
-
- private Directory directory;
-
- private MaintainIndexJob maintainIndexJob;
-
- /**
- * must be synchronized before accessing or modifying
- */
- private final Map<ITask, TaskData> reindexQueue = new HashMap<ITask, TaskData>();
-
- /**
- * do not access directly, instead use {@link #getIndexReader()}. 'this' must be synchronized before accessing or
- * modifying
- */
- private IndexReader indexReader;
-
- /**
- * indicate the need to rebuild the whole index
- */
- private volatile boolean rebuildIndex = false;
-
- /**
- * 'this' must be synchronized before accessing or modifying
- */
- private String lastPatternString;
-
- /**
- * 'this' must be synchronized before accessing or modifying
- */
- private Set<String> lastResults;
-
- private IndexField defaultField = IndexField.SUMMARY;
-
- private final TaskList taskList;
-
- private final TaskDataManager dataManager;
-
- private final IRepositoryManager repositoryManager;
-
- private long startupDelay = 6000L;
-
- private long reindexDelay = 3000L;
-
- private int maxMatchSearchHits = 1500;
-
- /**
- * must hold this lock as a read lock when accessing the index, and must hold this lock as a write lock when closing
- * or reassigning {@link #indexReader}.
- */
- private final ReadWriteLock indexReaderLock = new ReentrantReadWriteLock(true);
-
- private TaskListIndex(TaskList taskList, TaskDataManager dataManager, IRepositoryManager repositoryManager) {
- Assert.isNotNull(taskList);
- Assert.isNotNull(dataManager);
- Assert.isNotNull(repositoryManager);
-
- this.taskList = taskList;
- this.dataManager = dataManager;
- this.repositoryManager = repositoryManager;
- }
-
- /**
- * the task list associated with this index
- */
- public ITaskList getTaskList() {
- return taskList;
- }
-
- /**
- * the data manager associated with this index
- */
- public ITaskDataManager getDataManager() {
- return dataManager;
- }
-
- /**
- * the repository manager associated with this index
- */
- public IRepositoryManager getRepositoryManager() {
- return repositoryManager;
- }
-
- /**
- * Create an index on the given task list. Must be matched by a corresponding call to {@link #close()}.
- *
- * @param taskList
- * the task list that is to be indexed
- * @param dataManager
- * the data manager that corresponds to the task list
- * @param repositoryManager
- * the repository manager that corresponds to the task list
- * @param indexLocation
- * the location of the index on the filesystem
- * @see #TaskListIndex(TaskList, TaskDataManager, Directory)
- */
- public TaskListIndex(TaskList taskList, TaskDataManager dataManager, IRepositoryManager repositoryManager,
- File indexLocation) {
- this(taskList, dataManager, repositoryManager, indexLocation, 6000L);
- }
-
- /**
- * Create an index on the given task list. Must be matched by a corresponding call to {@link #close()}.
- *
- * @param taskList
- * the task list that is to be indexed
- * @param dataManager
- * the data manager that corresponds to the task list
- * @param repositoryManager
- * the repository manager that corresponds to the task list
- * @param startupDelay
- * the delay in miliseconds before the index initialization maintenance process should begin
- * @see #TaskListIndex(TaskList, TaskDataManager, File)
- */
- public TaskListIndex(TaskList taskList, TaskDataManager dataManager, IRepositoryManager repositoryManager,
- File indexLocation, long startupDelay) {
- this(taskList, dataManager, repositoryManager);
- Assert.isTrue(startupDelay >= 0L && startupDelay <= (1000L * 60));
- Assert.isNotNull(indexLocation);
-
- this.startupDelay = startupDelay;
- if (!indexLocation.exists()) {
- rebuildIndex = true;
- if (!indexLocation.mkdirs()) {
- StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
- "Cannot create task list index folder: " + indexLocation)); //$NON-NLS-1$
- }
- }
- if (indexLocation.exists() && indexLocation.isDirectory()) {
- try {
- directory = new NIOFSDirectory(indexLocation);
- } catch (IOException e) {
- StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
- "Cannot create task list index", e)); //$NON-NLS-1$
- }
- }
- initialize();
- }
-
- /**
- * Create an index on the given task list. Must be matched by a corresponding call to {@link #close()}.
- *
- * @param taskList
- * the task list that is to be indexed
- * @param dataManager
- * the data manager that corresponds to the task list
- * @param repositoryManager
- * the repository manager that corresponds to the task list
- * @param directory
- * the directory in which the index should be stored
- * @see #TaskListIndex(TaskList, TaskDataManager, File)
- */
- public TaskListIndex(TaskList taskList, TaskDataManager dataManager, IRepositoryManager repositoryManager,
- Directory directory) {
- this(taskList, dataManager, repositoryManager);
- this.directory = directory;
- initialize();
- }
-
- /**
- * the delay before reindexing occurs after a task has changed or after {@link #reindex()} is called
- */
- public long getReindexDelay() {
- return reindexDelay;
- }
-
- /**
- * the delay before reindexing occurs after a task has changed or after {@link #reindex()} is called.
- *
- * @param reindexDelay
- * The delay in miliseconds. Specify 0 to indicate no delay.
- */
- public void setReindexDelay(long reindexDelay) {
- Assert.isTrue(reindexDelay >= 0);
- this.reindexDelay = reindexDelay;
- }
-
- /**
- * the default field used to match tasks when unspecified in the query
- */
- public IndexField getDefaultField() {
- return defaultField;
- }
-
- /**
- * the default field used to match tasks when unspecified in the query
- */
- public void setDefaultField(IndexField defaultField) {
- Assert.isNotNull(defaultField);
- this.defaultField = defaultField;
- synchronized (this) {
- lastResults = null;
- }
- }
-
- /**
- * the maximum number of search hits that should be provided when using {@link #matches(ITask, String)}
- */
- public int getMaxMatchSearchHits() {
- return maxMatchSearchHits;
- }
-
- /**
- * the maximum number of search hits that should be provided when using {@link #matches(ITask, String)}
- */
- public void setMaxMatchSearchHits(int maxMatchSearchHits) {
- this.maxMatchSearchHits = maxMatchSearchHits;
- }
-
- private void initialize() {
- if (!rebuildIndex) {
- IndexReader indexReader = null;
- try {
- indexReader = getIndexReader();
- } catch (Exception e) {
- // ignore, this can happen if the index is corrupt
- }
- if (indexReader == null) {
- rebuildIndex = true;
- }
- }
- maintainIndexJob = new MaintainIndexJob();
- dataManager.addListener(this);
- taskList.addChangeListener(this);
- repositoryManager.addListener(this);
-
- scheduleIndexMaintenance(MaintainIndexType.STARTUP);
- }
-
- private void scheduleIndexMaintenance(MaintainIndexType type) {
- long delay = 0L;
- switch (type) {
- case STARTUP:
- delay = startupDelay;
- break;
- case REINDEX:
- delay = reindexDelay;
- }
-
- if (delay == 0L) {
- // primarily for testing purposes
-
- maintainIndexJob.cancel();
- try {
- maintainIndexJob.join();
- } catch (InterruptedException e) {
- // ignore
- }
- try {
- maintainIndex(new NullProgressMonitor());
- } catch (CoreException e) {
- MultiStatus logStatus = new MultiStatus(TasksIndexCore.ID_PLUGIN, 0,
- "Failed to update task list index", e); //$NON-NLS-1$
- logStatus.add(e.getStatus());
- StatusHandler.log(logStatus);
- }
- } else {
- maintainIndexJob.schedule(delay);
- }
- }
-
- /**
- * Indicates if the given task matches the given pattern string. Uses the backing index to detect a match by looking
- * for tasks that match the given pattern string. The results of the search are cached such that future calls to
- * this method using the same pattern string do not require use of the backing index, making this method very
- * efficient for multiple calls with the same pattern string. Cached results for a given pattern string are
- * discarded if this method is called with a different pattern string.
- *
- * @param task
- * the task to match
- * @param patternString
- * the pattern used to detect a match
- */
- public boolean matches(ITask task, String patternString) {
- if (patternString.equals(COMMAND_RESET_INDEX)) {
- reindex();
- }
- Lock readLock = indexReaderLock.readLock();
- readLock.lock();
- try {
-
- IndexReader indexReader = getIndexReader();
- if (indexReader != null) {
- Set<String> hits;
-
- final boolean needIndexHit;
- synchronized (this) {
- needIndexHit = lastResults == null
- || (lastPatternString == null || !lastPatternString.equals(patternString));
- }
- if (needIndexHit) {
- this.lastPatternString = patternString;
-
- hits = new HashSet<String>();
-
- IndexSearcher indexSearcher = new IndexSearcher(indexReader);
- try {
- Query query = computeQuery(patternString);
- TopDocs results = indexSearcher.search(query, maxMatchSearchHits);
- for (ScoreDoc scoreDoc : results.scoreDocs) {
- Document document = indexReader.document(scoreDoc.doc);
- hits.add(document.get(IndexField.IDENTIFIER.fieldName()));
- }
- } catch (IOException e) {
- StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
- "Unexpected failure within task list index", e)); //$NON-NLS-1$
- } finally {
- try {
- indexSearcher.close();
- } catch (IOException e) {
- // ignore
- }
- }
-
- } else {
- hits = lastResults;
- }
- synchronized (this) {
- if (this.indexReader == indexReader) {
- this.lastPatternString = patternString;
- this.lastResults = hits;
- }
- }
- String taskIdentifier = task.getHandleIdentifier();
- return hits != null && hits.contains(taskIdentifier);
- }
-
- } finally {
- readLock.unlock();
- }
- return false;
- }
-
- public void reindex() {
- rebuildIndex = true;
- scheduleIndexMaintenance(MaintainIndexType.REINDEX);
- }
-
- /**
- * call to wait until index maintenance has completed
- *
- * @throws InterruptedException
- */
- public void waitUntilIdle() throws InterruptedException {
- if (!Platform.isRunning() && reindexDelay != 0L) {
- // job join() behaviour is not the same when platform is not running
- Logger.getLogger(TaskListIndex.class.getName()).warning(
- "Index job joining may not work properly when Eclipse platform is not running"); //$NON-NLS-1$
- }
- maintainIndexJob.join();
- }
-
- /**
- * finds tasks that match the given pattern string
- *
- * @param patternString
- * the pattern string, used to match tasks
- * @param collector
- * the collector that receives tasks
- * @param resultsLimit
- * the maximum number of tasks to find. Specifying a limit enables the index to be more efficient since
- * it can skip over matching tasks that do not score highly enough. Specify {@link Integer#MAX_VALUE} if
- * there should be no limit.
- */
- public void find(String patternString, TaskCollector collector, int resultsLimit) {
- Assert.isNotNull(patternString);
- Assert.isNotNull(collector);
- Assert.isTrue(resultsLimit > 0);
-
- Lock readLock = indexReaderLock.readLock();
- readLock.lock();
- try {
- IndexReader indexReader = getIndexReader();
- if (indexReader != null) {
- IndexSearcher indexSearcher = new IndexSearcher(indexReader);
- try {
- Query query = computeQuery(patternString);
- TopDocs results = indexSearcher.search(query, resultsLimit);
- for (ScoreDoc scoreDoc : results.scoreDocs) {
- Document document = indexReader.document(scoreDoc.doc);
- String taskIdentifier = document.get(IndexField.IDENTIFIER.fieldName());
- AbstractTask task = taskList.getTask(taskIdentifier);
- if (task != null) {
- collector.collect(task);
- }
- }
- } catch (IOException e) {
- StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
- "Unexpected failure within task list index", e)); //$NON-NLS-1$
- } finally {
- try {
- indexSearcher.close();
- } catch (IOException e) {
- // ignore
- }
- }
- }
- } finally {
- readLock.unlock();
- }
- }
-
- private Query computeQuery(String patternString) {
- String upperPatternString = patternString.toUpperCase();
-
- boolean hasBooleanSpecifiers = upperPatternString.contains(" OR ") || upperPatternString.contains(" AND ") //$NON-NLS-1$ //$NON-NLS-2$
- || upperPatternString.contains(" NOT "); //$NON-NLS-1$
-
- if (patternString.indexOf(':') == -1 && !hasBooleanSpecifiers && defaultField == IndexField.SUMMARY
- && patternString.indexOf('"') == -1) {
- return new PrefixQuery(new Term(defaultField.fieldName(), patternString));
- }
- QueryParser qp = new QueryParser(Version.LUCENE_CURRENT, defaultField.fieldName(), new TaskAnalyzer());
- Query q;
- try {
- q = qp.parse(patternString);
- } catch (ParseException e) {
- return new PrefixQuery(new Term(defaultField.fieldName(), patternString));
- }
-
- // relax term clauses to be prefix clauses so that we get results close
- // to what we're expecting
- // from previous task list search
- if (q instanceof BooleanQuery) {
- BooleanQuery query = (BooleanQuery) q;
- for (BooleanClause clause : query.getClauses()) {
- if (clause.getQuery() instanceof TermQuery) {
- TermQuery termQuery = (TermQuery) clause.getQuery();
- clause.setQuery(new PrefixQuery(termQuery.getTerm()));
- }
- if (!hasBooleanSpecifiers) {
- clause.setOccur(Occur.MUST);
- }
- }
- } else if (q instanceof TermQuery) {
- return new PrefixQuery(((TermQuery) q).getTerm());
- }
- return q;
- }
-
- public void close() {
- dataManager.removeListener(this);
- taskList.removeChangeListener(this);
- repositoryManager.removeListener(this);
-
- maintainIndexJob.cancel();
- try {
- maintainIndexJob.join();
- } catch (InterruptedException e) {
- // ignore
- }
-
- Lock writeLock = indexReaderLock.writeLock();
- writeLock.lock();
- try {
- synchronized (this) {
- if (indexReader != null) {
- try {
- indexReader.close();
- } catch (IOException e) {
- // ignore
- }
- indexReader = null;
- }
- }
- try {
- directory.close();
- } catch (IOException e) {
- StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
- "Cannot close index: " + e.getMessage(), e)); //$NON-NLS-1$
- }
- } finally {
- writeLock.unlock();
- }
- }
-
- private IndexReader getIndexReader() {
- try {
- synchronized (this) {
- if (indexReader == null) {
- indexReader = IndexReader.open(directory, true);
- lastResults = null;
- }
- return indexReader;
- }
- } catch (CorruptIndexException e) {
- rebuildIndex = true;
- if (maintainIndexJob != null) {
- scheduleIndexMaintenance(MaintainIndexType.REINDEX);
- }
- } catch (FileNotFoundException e) {
- rebuildIndex = true;
- // expected if the index doesn't exist
- } catch (IOException e) {
- // ignore
- }
- return null;
- }
-
- public void taskDataUpdated(TaskDataManagerEvent event) {
- reindex(event.getTask(), event.getTaskData());
- }
-
- public void editsDiscarded(TaskDataManagerEvent event) {
- reindex(event.getTask(), event.getTaskData());
- }
-
- public void containersChanged(Set<TaskContainerDelta> containers) {
- for (TaskContainerDelta delta : containers) {
- switch (delta.getKind()) {
- case ADDED:
- case REMOVED:
- case CONTENT:
- IRepositoryElement element = delta.getElement();
- if (element instanceof ITask) {
- ITask task = (ITask) element;
- if ("local".equals(((AbstractTask) task).getConnectorKind())) { //$NON-NLS-1$
- reindex(task, null);
- }
- }
- }
- }
- }
-
- /**
- * advanced usage: cause the given task to be reindexed using {@link MaintainIndexType#REINDEX reindex scheduling
- * rule}.
- *
- * @param task
- * the task
- * @param taskData
- * the task data, or nul if it's not available
- */
- protected void reindex(ITask task, TaskData taskData) {
- if (task == null) {
- // this can happen when edits are discarded
- return;
- }
- if (!taskIsIndexable(task, taskData)) {
- return;
- }
- synchronized (reindexQueue) {
- reindexQueue.put(task, taskData);
- }
- scheduleIndexMaintenance(MaintainIndexType.REINDEX);
- }
-
- private void addIndexedAttributes(Document document, ITask task, TaskAttribute root) {
- addIndexedAttribute(document, IndexField.TASK_KEY, task.getTaskKey());
- addIndexedAttribute(document, IndexField.REPOSITORY_URL, task.getRepositoryUrl());
- addIndexedAttribute(document, IndexField.SUMMARY, task.getSummary());
-
- for (TaskAttribute contentAttribute : computeContentAttributes(root)) {
- addIndexedAttribute(document, IndexField.CONTENT, contentAttribute);
- }
-
- addIndexedDateAttributes(document, task);
-
- List<TaskAttribute> commentAttributes = root.getTaskData()
- .getAttributeMapper()
- .getAttributesByType(root.getTaskData(), TaskAttribute.TYPE_COMMENT);
- for (TaskAttribute commentAttribute : commentAttributes) {
-
- TaskComment taskComment = new TaskComment(root.getTaskData().getAttributeMapper().getTaskRepository(),
- task, commentAttribute);
- root.getTaskData().getAttributeMapper().updateTaskComment(taskComment, commentAttribute);
-
- String text = taskComment.getText();
- if (text.length() != 0) {
- addIndexedAttribute(document, IndexField.CONTENT, text);
- }
- IRepositoryPerson author = taskComment.getAuthor();
- if (author != null) {
- addIndexedAttribute(document, IndexField.PERSON, author.getPersonId());
- }
- }
-
- List<TaskAttribute> personAttributes = root.getTaskData()
- .getAttributeMapper()
- .getAttributesByType(root.getTaskData(), TaskAttribute.TYPE_PERSON);
- for (TaskAttribute personAttribute : personAttributes) {
- addIndexedAttribute(document, IndexField.PERSON, personAttribute);
- }
-
- for (IndexField field : IndexField.values()) {
- if (field.getAttributeId() != null) {
- addIndexedAttribute(document, field, root.getMappedAttribute(field.getAttributeId()));
- }
- }
- }
-
- /**
- * compute attributes that should be indexed as {@link IndexField#CONTENT}
- */
- private Collection<TaskAttribute> computeContentAttributes(TaskAttribute root) {
- Set<TaskAttribute> attributes = new LinkedHashSet<TaskAttribute>();
-
- // add default content attributes
- {
- TaskAttribute attribute = root.getMappedAttribute(TaskAttribute.SUMMARY);
- if (attribute != null) {
- attributes.add(attribute);
- }
- attribute = root.getMappedAttribute(TaskAttribute.DESCRIPTION);
- if (attribute != null) {
- attributes.add(attribute);
- }
- }
-
- for (TaskAttribute attribute : root.getAttributes().values()) {
- if (Boolean.parseBoolean(attribute.getMetaData().getValue(META_INDEXED_AS_CONTENT))) {
- attributes.add(attribute);
- }
- }
-
- return attributes;
- }
-
- private void addIndexedAttributes(Document document, ITask task) {
- addIndexedAttribute(document, IndexField.TASK_KEY, task.getTaskKey());
- addIndexedAttribute(document, IndexField.REPOSITORY_URL, task.getRepositoryUrl());
- addIndexedAttribute(document, IndexField.SUMMARY, task.getSummary());
- addIndexedAttribute(document, IndexField.CONTENT, task.getSummary());
- addIndexedAttribute(document, IndexField.CONTENT, ((AbstractTask) task).getNotes());
- addIndexedDateAttributes(document, task);
- }
-
- private void addIndexedDateAttributes(Document document, ITask task) {
- addIndexedAttribute(document, IndexField.COMPLETION_DATE, task.getCompletionDate());
- addIndexedAttribute(document, IndexField.CREATION_DATE, task.getCreationDate());
- addIndexedAttribute(document, IndexField.DUE_DATE, task.getDueDate());
- addIndexedAttribute(document, IndexField.MODIFICATION_DATE, task.getModificationDate());
- }
-
- private void addIndexedAttribute(Document document, IndexField indexField, TaskAttribute attribute) {
- if (attribute == null) {
- return;
- }
- List<String> values = attribute.getTaskData().getAttributeMapper().getValueLabels(attribute);
- if (values.isEmpty()) {
- return;
- }
-
- if (indexField.isPersonField()) {
- IRepositoryPerson repositoryPerson = attribute.getTaskData()
- .getAttributeMapper()
- .getRepositoryPerson(attribute);
- addIndexedAttribute(document, indexField, repositoryPerson);
-
- if (values.size() <= 1) {
- return;
- }
- }
-
- for (String value : values) {
- if (value.length() != 0) {
- addIndexedAttribute(document, indexField, value);
- }
- }
- }
-
- private void addIndexedAttribute(Document document, IndexField indexField, IRepositoryPerson person) {
- if (person != null) {
- addIndexedAttribute(document, indexField, person.getPersonId());
- addIndexedAttribute(document, indexField, person.getName());
- }
- }
-
- private void addIndexedAttribute(Document document, IndexField indexField, String value) {
- if (value == null) {
- return;
- }
- Field field = document.getField(indexField.fieldName());
- if (field == null) {
- field = new Field(indexField.fieldName(), value, Store.YES, org.apache.lucene.document.Field.Index.ANALYZED);
- document.add(field);
- } else {
- String existingValue = field.stringValue();
- if (indexField != IndexField.PERSON || !existingValue.contains(value)) {
- field.setValue(existingValue + " " + value); //$NON-NLS-1$
- }
- }
- }
-
- private void addIndexedAttribute(Document document, IndexField indexField, Date date) {
- if (date == null) {
- return;
- }
- // FIXME: date tools converts dates to GMT, and we don't really want that. So
- // move the date by the GMT offset if there is any
-
- String value = DateTools.dateToString(date, Resolution.HOUR);
- Field field = document.getField(indexField.fieldName());
- if (field == null) {
- field = new Field(indexField.fieldName(), value, Store.YES, org.apache.lucene.document.Field.Index.ANALYZED);
- document.add(field);
- } else {
- field.setValue(value);
- }
- }
-
- /**
- * Computes a query element for a field that must lie in a specified date range.
- *
- * @param field
- * the field
- * @param lowerBoundInclusive
- * the date lower bound that the field value must match, inclusive
- * @param upperBoundInclusive
- * the date upper bound that the field value must match, inclusive
- * @return
- */
- public String computeQueryFieldDateRange(IndexField field, Date lowerBoundInclusive, Date upperBoundInclusive) {
- return field.fieldName()
- + ":[" + DateTools.dateToString(lowerBoundInclusive, Resolution.DAY) + " TO " + DateTools.dateToString(upperBoundInclusive, Resolution.DAY) + "]"; //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
- }
-
- /**
- * Indicates if the given task is indexable. The default implementation returns true, subclasses may override to
- * filter some tasks from the task list. This method may be called more than once per task, with some calls omitting
- * the task data. In this way implementations can avoid loading task data if the decision to filter tasks can be
- * based on the ITask alone. Implementations that must read the task data in order to determine eligibility for
- * indexing should return true for tasks where the provided task data is null.
- *
- * @param task
- * the task
- * @param taskData
- * the task data, or null if there is no task data
- * @return true if the given task should be indexed, otherwise false.
- */
- protected boolean taskIsIndexable(ITask task, TaskData taskData) {
- return true;
- }
-
- /**
- * Escapes special characters in the given literal value so that they are not interpreted as special characters in a
- * query.
- *
- * @param value
- * the value to escape
- * @return a representation of the value with characters escaped
- */
- public String escapeFieldValue(String value) {
- // see http://lucene.apache.org/java/2_9_1/queryparsersyntax.html#Escaping%20Special%20Characters
- String escaped = value.replaceAll("([\\+\\-\\!\\(\\)\\{\\}\\[\\]^\"~\\*\\?:\\\\]|&&|\\|\\|)", "\\\\$1"); //$NON-NLS-1$ //$NON-NLS-2$
- return escaped;
- }
-
- private void maintainIndex(IProgressMonitor m) throws CoreException {
- final int WORK_PER_SEGMENT = 1000;
- SubMonitor monitor = SubMonitor.convert(m, 2 * WORK_PER_SEGMENT);
- try {
- try {
- if (!rebuildIndex) {
- try {
- IndexReader reader = IndexReader.open(directory, false);
- reader.close();
- } catch (CorruptIndexException e) {
- rebuildIndex = true;
- }
- }
-
- if (rebuildIndex) {
- synchronized (reindexQueue) {
- reindexQueue.clear();
- }
-
- IStatus status = rebuildIndexCompletely(monitor.newChild(WORK_PER_SEGMENT));
- if (!status.isOK()) {
- StatusHandler.log(status);
- }
- } else {
- monitor.worked(WORK_PER_SEGMENT);
- }
-
- // index any tasks that have been changed
- indexQueuedTasks(monitor.newChild(WORK_PER_SEGMENT));
-
- // prevent new searches from reading the now-stale index
- closeIndexReader();
- } catch (IOException e) {
- throw new CoreException(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
- "Unexpected exception: " + e.getMessage(), e)); //$NON-NLS-1$
- }
- } finally {
- monitor.done();
- }
- }
-
- private void closeIndexReader() throws IOException {
- Lock writeLock = indexReaderLock.writeLock();
- writeLock.lock();
- try {
- synchronized (this) {
- if (indexReader != null) {
- indexReader.close();
- indexReader = null;
- }
- }
- } finally {
- writeLock.unlock();
- }
- }
-
- private void indexQueuedTasks(SubMonitor monitor) throws CorruptIndexException, LockObtainFailedException,
- IOException {
-
- synchronized (reindexQueue) {
- if (reindexQueue.isEmpty()) {
- return;
- }
-
- monitor.beginTask(Messages.TaskListIndex_task_rebuilding_index, reindexQueue.size());
- }
-
- try {
- IndexWriter writer = null;
- try {
- Map<ITask, TaskData> workingQueue = new HashMap<ITask, TaskData>();
-
- // reindex tasks that are in the reindexQueue, making multiple passes so that we catch anything
- // added/changed while we were reindexing
- for (;;) {
- workingQueue.clear();
-
- synchronized (reindexQueue) {
- if (reindexQueue.isEmpty()) {
- break;
- }
- // move items from the reindexQueue to the temporary working queue
- workingQueue.putAll(reindexQueue);
- reindexQueue.keySet().removeAll(workingQueue.keySet());
- }
-
- if (writer == null) {
- writer = new IndexWriter(directory, new TaskAnalyzer(), false,
- IndexWriter.MaxFieldLength.UNLIMITED);
- }
-
- monitor.setWorkRemaining(workingQueue.size());
-
- for (Entry<ITask, TaskData> entry : workingQueue.entrySet()) {
- ITask task = entry.getKey();
- TaskData taskData = entry.getValue();
-
- writer.deleteDocuments(new Term(IndexField.IDENTIFIER.fieldName(), task.getHandleIdentifier()));
-
- add(writer, task, taskData);
-
- monitor.worked(1);
- }
- }
- } finally {
- if (writer != null) {
- writer.close();
- }
- }
- } finally {
- monitor.done();
- }
- }
-
- private class TaskListState implements ITaskListRunnable {
- List<ITask> indexableTasks;
-
- public void execute(IProgressMonitor monitor) throws CoreException {
- Collection<AbstractTask> tasks = taskList.getAllTasks();
- indexableTasks = new ArrayList<ITask>(tasks.size());
-
- for (ITask task : tasks) {
- if (taskIsIndexable(task, null)) {
- indexableTasks.add(task);
- }
- }
- }
-
- }
-
- private IStatus rebuildIndexCompletely(SubMonitor monitor) throws CorruptIndexException, LockObtainFailedException,
- IOException, CoreException {
-
- MultiStatus multiStatus = new MultiStatus(TasksIndexCore.ID_PLUGIN, 0, null, null);
-
- // get indexable tasks from the task list
- final TaskListState taskListState = new TaskListState();
- taskList.run(taskListState, monitor.newChild(0));
-
- monitor.beginTask(Messages.TaskListIndex_task_rebuilding_index, taskListState.indexableTasks.size());
- try {
- final IndexWriter writer = new IndexWriter(directory, new TaskAnalyzer(), true,
- IndexWriter.MaxFieldLength.UNLIMITED);
- try {
-
- for (ITask task : taskListState.indexableTasks) {
- if (taskIsIndexable(task, null)) {
- try {
- TaskData taskData = dataManager.getTaskData(task);
- add(writer, task, taskData);
- } catch (CoreException e) {
- // an individual task data error should not prevent the index from updating
- multiStatus.add(e.getStatus());
- }
- }
- monitor.worked(1);
- }
- synchronized (this) {
- rebuildIndex = false;
- }
- } finally {
- writer.close();
- }
- } finally {
- monitor.done();
- }
- return multiStatus;
- }
-
- /**
- * @param writer
- * @param task
- * the task
- * @param taskData
- * may be null for local tasks
- * @throws CorruptIndexException
- * @throws IOException
- */
- private void add(IndexWriter writer, ITask task, TaskData taskData) throws CorruptIndexException, IOException {
- if (!taskIsIndexable(task, taskData)) {
- return;
- }
-
- Document document = new Document();
-
- document.add(new Field(IndexField.IDENTIFIER.fieldName(), task.getHandleIdentifier(), Store.YES,
- org.apache.lucene.document.Field.Index.ANALYZED));
- if (taskData == null) {
- if ("local".equals(((AbstractTask) task).getConnectorKind())) { //$NON-NLS-1$
- addIndexedAttributes(document, task);
- } else {
- return;
- }
- } else {
- addIndexedAttributes(document, task, taskData.getRoot());
- }
- writer.addDocument(document);
- }
-
- public void repositoryAdded(TaskRepository repository) {
- // ignore
- }
-
- public void repositoryRemoved(TaskRepository repository) {
- // ignore
- }
-
- public void repositorySettingsChanged(TaskRepository repository) {
- // ignore
- }
-
- public void repositoryUrlChanged(TaskRepository repository, String oldUrl) {
- reindex();
- }
-}
+/*******************************************************************************
+ * Copyright (c) 2011, 2012 Tasktop Technologies.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Tasktop Technologies - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.mylyn.internal.tasks.index.core;
+
+import static org.eclipse.mylyn.tasks.core.data.TaskAttribute.META_INDEXED_AS_CONTENT;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+import java.util.logging.Logger;
+
+import org.apache.lucene.document.DateTools;
+import org.apache.lucene.document.DateTools.Resolution;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.Field;
+import org.apache.lucene.document.Field.Store;
+import org.apache.lucene.index.CorruptIndexException;
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.IndexWriter;
+import org.apache.lucene.index.Term;
+import org.apache.lucene.queryParser.ParseException;
+import org.apache.lucene.queryParser.QueryParser;
+import org.apache.lucene.search.BooleanClause;
+import org.apache.lucene.search.BooleanClause.Occur;
+import org.apache.lucene.search.BooleanQuery;
+import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.PrefixQuery;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.search.ScoreDoc;
+import org.apache.lucene.search.TermQuery;
+import org.apache.lucene.search.TopDocs;
+import org.apache.lucene.store.Directory;
+import org.apache.lucene.store.LockObtainFailedException;
+import org.apache.lucene.store.NIOFSDirectory;
+import org.apache.lucene.util.Version;
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.MultiStatus;
+import org.eclipse.core.runtime.NullProgressMonitor;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.SubMonitor;
+import org.eclipse.core.runtime.jobs.Job;
+import org.eclipse.mylyn.commons.core.StatusHandler;
+import org.eclipse.mylyn.internal.tasks.core.AbstractTask;
+import org.eclipse.mylyn.internal.tasks.core.ITaskList;
+import org.eclipse.mylyn.internal.tasks.core.ITaskListChangeListener;
+import org.eclipse.mylyn.internal.tasks.core.ITaskListRunnable;
+import org.eclipse.mylyn.internal.tasks.core.TaskComment;
+import org.eclipse.mylyn.internal.tasks.core.TaskContainerDelta;
+import org.eclipse.mylyn.internal.tasks.core.TaskList;
+import org.eclipse.mylyn.internal.tasks.core.data.ITaskDataManagerListener;
+import org.eclipse.mylyn.internal.tasks.core.data.TaskDataManager;
+import org.eclipse.mylyn.internal.tasks.core.data.TaskDataManagerEvent;
+import org.eclipse.mylyn.tasks.core.IRepositoryElement;
+import org.eclipse.mylyn.tasks.core.IRepositoryListener;
+import org.eclipse.mylyn.tasks.core.IRepositoryManager;
+import org.eclipse.mylyn.tasks.core.IRepositoryPerson;
+import org.eclipse.mylyn.tasks.core.ITask;
+import org.eclipse.mylyn.tasks.core.TaskRepository;
+import org.eclipse.mylyn.tasks.core.data.AbstractTaskSchema;
+import org.eclipse.mylyn.tasks.core.data.DefaultTaskSchema;
+import org.eclipse.mylyn.tasks.core.data.ITaskDataManager;
+import org.eclipse.mylyn.tasks.core.data.TaskAttribute;
+import org.eclipse.mylyn.tasks.core.data.TaskData;
+
+/**
+ * An index on a task list, provides a way to {@link #find(String, TaskCollector, int) search for tasks}, and a way to
+ * {@link #matches(ITask, String) match tasks}. Tasks are matched against a search query.
+ * <p>
+ * The task list has a configurable delay before it updates, meaning that there is a period of time where the index will
+ * be out of date with respect to task changes. The idea is that updates to the index can be "batched" for greater
+ * efficiency. Additionally, it's possible for a task to be updated either before or after the index is added to the
+ * task list as a listener, thus opening the possibility of changes without updates to the index. In either of these
+ * cases, the index can be out of date with respect to the current state of tasks. If the index is used in such a state,
+ * the result could be either false matches, no match where there should be a match, or incorrect prioritization of
+ * index "hits".
+ * </p>
+ * <p>
+ * The index has the option of reindexing all tasks via API. This will bring the index up to date and is useful for
+ * cases where it's known that the index may not be up to date. In its current form this reindex operation can be
+ * triggered by the user by including "index:reset" in the search string. Reindexing is potentially an expensive, IO
+ * intensive long-running operation. With about 20,000 tasks in my task list and an SSD, reindexing takes about 90
+ * seconds.
+ * </p>
+ *
+ * @author David Green
+ */
+public class TaskListIndex implements ITaskDataManagerListener, ITaskListChangeListener, IRepositoryListener {
+
+ private class MaintainIndexJob extends Job {
+
+ public MaintainIndexJob() {
+ super(Messages.TaskListIndex_indexerJob);
+ setUser(false);
+ setSystem(false); // true?
+ setPriority(Job.LONG);
+ }
+
+ @Override
+ public IStatus run(IProgressMonitor m) {
+ if (m.isCanceled()) {
+ return Status.CANCEL_STATUS;
+ }
+ try {
+ maintainIndex(m);
+ } catch (CoreException e) {
+ MultiStatus logStatus = new MultiStatus(TasksIndexCore.ID_PLUGIN, 0,
+ "Failed to update task list index", e); //$NON-NLS-1$
+ logStatus.add(e.getStatus());
+ StatusHandler.log(logStatus);
+ }
+ return Status.OK_STATUS;
+ }
+
+ }
+
+ public abstract static class TaskCollector {
+
+ public abstract void collect(ITask task);
+
+ }
+
+ private static final Object COMMAND_RESET_INDEX = "index:reset"; //$NON-NLS-1$
+
+ public static enum IndexField {
+ IDENTIFIER(false, null, TaskAttribute.TYPE_SHORT_TEXT), //
+ TASK_KEY(false, DefaultTaskSchema.getInstance().TASK_KEY), //
+ REPOSITORY_URL(false, null, TaskAttribute.TYPE_URL), //
+ SUMMARY(true, DefaultTaskSchema.getInstance().SUMMARY), //
+ CONTENT(true, null, TaskAttribute.TYPE_LONG_TEXT), //
+ ASSIGNEE(true, DefaultTaskSchema.getInstance().USER_ASSIGNED), //
+ REPORTER(true, DefaultTaskSchema.getInstance().USER_REPORTER), //
+ PERSON(true, null, TaskAttribute.TYPE_PERSON), //
+ COMPONENT(true, DefaultTaskSchema.getInstance().COMPONENT), //
+ COMPLETION_DATE(true, DefaultTaskSchema.getInstance().DATE_COMPLETION), //
+ CREATION_DATE(true, DefaultTaskSchema.getInstance().DATE_CREATION), //
+ DUE_DATE(true, DefaultTaskSchema.getInstance().DATE_DUE), //
+ MODIFICATION_DATE(true, DefaultTaskSchema.getInstance().DATE_MODIFICATION), //
+ DESCRIPTION(true, DefaultTaskSchema.getInstance().DESCRIPTION), //
+ KEYWORDS(true, DefaultTaskSchema.getInstance().KEYWORDS), //
+ PRODUCT(true, DefaultTaskSchema.getInstance().PRODUCT), //
+ RESOLUTION(true, DefaultTaskSchema.getInstance().RESOLUTION), //
+ SEVERITY(true, DefaultTaskSchema.getInstance().SEVERITY), //
+ STATUS(true, DefaultTaskSchema.getInstance().STATUS);
+
+ private final String attributeId;
+
+ private final String type;
+
+ private final boolean userVisible;
+
+ private IndexField(boolean userVisible, AbstractTaskSchema.Field field) {
+ this(userVisible, field.getKey(), field.getType());
+ }
+
+ private IndexField(boolean userVisible, String attributeId, String type) {
+ this.userVisible = userVisible;
+ this.attributeId = attributeId;
+ this.type = type;
+ }
+
+ public String fieldName() {
+ return name().toLowerCase();
+ }
+
+ /**
+ * get the task attribute id, or null if this field has special handling
+ */
+ public String getAttributeId() {
+ return attributeId;
+ }
+
+ /**
+ * indicate if the field should be exposed in the UI
+ */
+ public boolean isUserVisible() {
+ return userVisible;
+ }
+
+ /**
+ * the type of field, as it relates to <code>TaskAttribute.TYPE_*</code>
+ */
+ public String getType() {
+ return type;
+ }
+
+ /**
+ * indicate if the field is a date or date/time field
+ */
+ public boolean isTypeDate() {
+ return type != null && (TaskAttribute.TYPE_DATE.equals(type) || TaskAttribute.TYPE_DATETIME.equals(type));
+ }
+
+ /**
+ * indicate if this is a person field
+ */
+ public boolean isPersonField() {
+ return type != null && (TaskAttribute.TYPE_PERSON.equals(type) || TaskAttribute.TYPE_PERSON.equals(type));
+ }
+
+ public static IndexField fromFieldName(String fieldName) {
+ try {
+ return IndexField.valueOf(fieldName.toUpperCase());
+ } catch (IllegalArgumentException e) {
+ return null;
+ }
+ }
+
+ }
+
+ private static enum MaintainIndexType {
+ STARTUP, REINDEX
+ }
+
+ // FIXME: document concurrency model
+
+ private Directory directory;
+
+ private MaintainIndexJob maintainIndexJob;
+
+ /**
+ * must be synchronized before accessing or modifying
+ */
+ private final Map<ITask, TaskData> reindexQueue = new HashMap<ITask, TaskData>();
+
+ /**
+ * do not access directly, instead use {@link #getIndexReader()}. 'this' must be synchronized before accessing or
+ * modifying
+ */
+ private IndexReader indexReader;
+
+ /**
+ * indicate the need to rebuild the whole index
+ */
+ private volatile boolean rebuildIndex = false;
+
+ /**
+ * 'this' must be synchronized before accessing or modifying
+ */
+ private String lastPatternString;
+
+ /**
+ * 'this' must be synchronized before accessing or modifying
+ */
+ private Set<String> lastResults;
+
+ private IndexField defaultField = IndexField.SUMMARY;
+
+ private final TaskList taskList;
+
+ private final TaskDataManager dataManager;
+
+ private final IRepositoryManager repositoryManager;
+
+ private long startupDelay = 6000L;
+
+ private long reindexDelay = 3000L;
+
+ private int maxMatchSearchHits = 1500;
+
+ /**
+ * must hold this lock as a read lock when accessing the index, and must hold this lock as a write lock when closing
+ * or reassigning {@link #indexReader}.
+ */
+ private final ReadWriteLock indexReaderLock = new ReentrantReadWriteLock(true);
+
+ private TaskListIndex(TaskList taskList, TaskDataManager dataManager, IRepositoryManager repositoryManager) {
+ Assert.isNotNull(taskList);
+ Assert.isNotNull(dataManager);
+ Assert.isNotNull(repositoryManager);
+
+ this.taskList = taskList;
+ this.dataManager = dataManager;
+ this.repositoryManager = repositoryManager;
+ }
+
+ /**
+ * the task list associated with this index
+ */
+ public ITaskList getTaskList() {
+ return taskList;
+ }
+
+ /**
+ * the data manager associated with this index
+ */
+ public ITaskDataManager getDataManager() {
+ return dataManager;
+ }
+
+ /**
+ * the repository manager associated with this index
+ */
+ public IRepositoryManager getRepositoryManager() {
+ return repositoryManager;
+ }
+
+ /**
+ * Create an index on the given task list. Must be matched by a corresponding call to {@link #close()}.
+ *
+ * @param taskList
+ * the task list that is to be indexed
+ * @param dataManager
+ * the data manager that corresponds to the task list
+ * @param repositoryManager
+ * the repository manager that corresponds to the task list
+ * @param indexLocation
+ * the location of the index on the filesystem
+ * @see #TaskListIndex(TaskList, TaskDataManager, Directory)
+ */
+ public TaskListIndex(TaskList taskList, TaskDataManager dataManager, IRepositoryManager repositoryManager,
+ File indexLocation) {
+ this(taskList, dataManager, repositoryManager, indexLocation, 6000L);
+ }
+
+ /**
+ * Create an index on the given task list. Must be matched by a corresponding call to {@link #close()}.
+ *
+ * @param taskList
+ * the task list that is to be indexed
+ * @param dataManager
+ * the data manager that corresponds to the task list
+ * @param repositoryManager
+ * the repository manager that corresponds to the task list
+ * @param startupDelay
+ * the delay in miliseconds before the index initialization maintenance process should begin
+ * @see #TaskListIndex(TaskList, TaskDataManager, File)
+ */
+ public TaskListIndex(TaskList taskList, TaskDataManager dataManager, IRepositoryManager repositoryManager,
+ File indexLocation, long startupDelay) {
+ this(taskList, dataManager, repositoryManager);
+ Assert.isTrue(startupDelay >= 0L && startupDelay <= (1000L * 60));
+ Assert.isNotNull(indexLocation);
+
+ this.startupDelay = startupDelay;
+ if (!indexLocation.exists()) {
+ rebuildIndex = true;
+ if (!indexLocation.mkdirs()) {
+ StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
+ "Cannot create task list index folder: " + indexLocation)); //$NON-NLS-1$
+ }
+ }
+ if (indexLocation.exists() && indexLocation.isDirectory()) {
+ try {
+ directory = new NIOFSDirectory(indexLocation);
+ } catch (IOException e) {
+ StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
+ "Cannot create task list index", e)); //$NON-NLS-1$
+ }
+ }
+ initialize();
+ }
+
+ /**
+ * Create an index on the given task list. Must be matched by a corresponding call to {@link #close()}.
+ *
+ * @param taskList
+ * the task list that is to be indexed
+ * @param dataManager
+ * the data manager that corresponds to the task list
+ * @param repositoryManager
+ * the repository manager that corresponds to the task list
+ * @param directory
+ * the directory in which the index should be stored
+ * @see #TaskListIndex(TaskList, TaskDataManager, File)
+ */
+ public TaskListIndex(TaskList taskList, TaskDataManager dataManager, IRepositoryManager repositoryManager,
+ Directory directory) {
+ this(taskList, dataManager, repositoryManager);
+ this.directory = directory;
+ initialize();
+ }
+
+ /**
+ * the delay before reindexing occurs after a task has changed or after {@link #reindex()} is called
+ */
+ public long getReindexDelay() {
+ return reindexDelay;
+ }
+
+ /**
+ * the delay before reindexing occurs after a task has changed or after {@link #reindex()} is called.
+ *
+ * @param reindexDelay
+ * The delay in miliseconds. Specify 0 to indicate no delay.
+ */
+ public void setReindexDelay(long reindexDelay) {
+ Assert.isTrue(reindexDelay >= 0);
+ this.reindexDelay = reindexDelay;
+ }
+
+ /**
+ * the default field used to match tasks when unspecified in the query
+ */
+ public IndexField getDefaultField() {
+ return defaultField;
+ }
+
+ /**
+ * the default field used to match tasks when unspecified in the query
+ */
+ public void setDefaultField(IndexField defaultField) {
+ Assert.isNotNull(defaultField);
+ this.defaultField = defaultField;
+ synchronized (this) {
+ lastResults = null;
+ }
+ }
+
+ /**
+ * the maximum number of search hits that should be provided when using {@link #matches(ITask, String)}
+ */
+ public int getMaxMatchSearchHits() {
+ return maxMatchSearchHits;
+ }
+
+ /**
+ * the maximum number of search hits that should be provided when using {@link #matches(ITask, String)}
+ */
+ public void setMaxMatchSearchHits(int maxMatchSearchHits) {
+ this.maxMatchSearchHits = maxMatchSearchHits;
+ }
+
+ private void initialize() {
+ if (!rebuildIndex) {
+ IndexReader indexReader = null;
+ try {
+ indexReader = getIndexReader();
+ } catch (Exception e) {
+ // ignore, this can happen if the index is corrupt
+ }
+ if (indexReader == null) {
+ rebuildIndex = true;
+ }
+ }
+ maintainIndexJob = new MaintainIndexJob();
+ dataManager.addListener(this);
+ taskList.addChangeListener(this);
+ repositoryManager.addListener(this);
+
+ scheduleIndexMaintenance(MaintainIndexType.STARTUP);
+ }
+
+ private void scheduleIndexMaintenance(MaintainIndexType type) {
+ long delay = 0L;
+ switch (type) {
+ case STARTUP:
+ delay = startupDelay;
+ break;
+ case REINDEX:
+ delay = reindexDelay;
+ }
+
+ if (delay == 0L) {
+ // primarily for testing purposes
+
+ maintainIndexJob.cancel();
+ try {
+ maintainIndexJob.join();
+ } catch (InterruptedException e) {
+ // ignore
+ }
+ try {
+ maintainIndex(new NullProgressMonitor());
+ } catch (CoreException e) {
+ MultiStatus logStatus = new MultiStatus(TasksIndexCore.ID_PLUGIN, 0,
+ "Failed to update task list index", e); //$NON-NLS-1$
+ logStatus.add(e.getStatus());
+ StatusHandler.log(logStatus);
+ }
+ } else {
+ maintainIndexJob.schedule(delay);
+ }
+ }
+
+ /**
+ * Indicates if the given task matches the given pattern string. Uses the backing index to detect a match by looking
+ * for tasks that match the given pattern string. The results of the search are cached such that future calls to
+ * this method using the same pattern string do not require use of the backing index, making this method very
+ * efficient for multiple calls with the same pattern string. Cached results for a given pattern string are
+ * discarded if this method is called with a different pattern string.
+ *
+ * @param task
+ * the task to match
+ * @param patternString
+ * the pattern used to detect a match
+ */
+ public boolean matches(ITask task, String patternString) {
+ if (patternString.equals(COMMAND_RESET_INDEX)) {
+ reindex();
+ }
+ Lock readLock = indexReaderLock.readLock();
+ readLock.lock();
+ try {
+
+ IndexReader indexReader = getIndexReader();
+ if (indexReader != null) {
+ Set<String> hits;
+
+ final boolean needIndexHit;
+ synchronized (this) {
+ needIndexHit = lastResults == null
+ || (lastPatternString == null || !lastPatternString.equals(patternString));
+ }
+ if (needIndexHit) {
+ this.lastPatternString = patternString;
+
+ hits = new HashSet<String>();
+
+ IndexSearcher indexSearcher = new IndexSearcher(indexReader);
+ try {
+ Query query = computeQuery(patternString);
+ TopDocs results = indexSearcher.search(query, maxMatchSearchHits);
+ for (ScoreDoc scoreDoc : results.scoreDocs) {
+ Document document = indexReader.document(scoreDoc.doc);
+ hits.add(document.get(IndexField.IDENTIFIER.fieldName()));
+ }
+ } catch (IOException e) {
+ StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
+ "Unexpected failure within task list index", e)); //$NON-NLS-1$
+ } finally {
+ try {
+ indexSearcher.close();
+ } catch (IOException e) {
+ // ignore
+ }
+ }
+
+ } else {
+ hits = lastResults;
+ }
+ synchronized (this) {
+ if (this.indexReader == indexReader) {
+ this.lastPatternString = patternString;
+ this.lastResults = hits;
+ }
+ }
+ String taskIdentifier = task.getHandleIdentifier();
+ return hits != null && hits.contains(taskIdentifier);
+ }
+
+ } finally {
+ readLock.unlock();
+ }
+ return false;
+ }
+
+ public void reindex() {
+ rebuildIndex = true;
+ scheduleIndexMaintenance(MaintainIndexType.REINDEX);
+ }
+
+ /**
+ * call to wait until index maintenance has completed
+ *
+ * @throws InterruptedException
+ */
+ public void waitUntilIdle() throws InterruptedException {
+ if (!Platform.isRunning() && reindexDelay != 0L) {
+ // job join() behaviour is not the same when platform is not running
+ Logger.getLogger(TaskListIndex.class.getName()).warning(
+ "Index job joining may not work properly when Eclipse platform is not running"); //$NON-NLS-1$
+ }
+ maintainIndexJob.join();
+ }
+
+ /**
+ * finds tasks that match the given pattern string
+ *
+ * @param patternString
+ * the pattern string, used to match tasks
+ * @param collector
+ * the collector that receives tasks
+ * @param resultsLimit
+ * the maximum number of tasks to find. Specifying a limit enables the index to be more efficient since
+ * it can skip over matching tasks that do not score highly enough. Specify {@link Integer#MAX_VALUE} if
+ * there should be no limit.
+ */
+ public void find(String patternString, TaskCollector collector, int resultsLimit) {
+ Assert.isNotNull(patternString);
+ Assert.isNotNull(collector);
+ Assert.isTrue(resultsLimit > 0);
+
+ Lock readLock = indexReaderLock.readLock();
+ readLock.lock();
+ try {
+ IndexReader indexReader = getIndexReader();
+ if (indexReader != null) {
+ IndexSearcher indexSearcher = new IndexSearcher(indexReader);
+ try {
+ Query query = computeQuery(patternString);
+ TopDocs results = indexSearcher.search(query, resultsLimit);
+ for (ScoreDoc scoreDoc : results.scoreDocs) {
+ Document document = indexReader.document(scoreDoc.doc);
+ String taskIdentifier = document.get(IndexField.IDENTIFIER.fieldName());
+ AbstractTask task = taskList.getTask(taskIdentifier);
+ if (task != null) {
+ collector.collect(task);
+ }
+ }
+ } catch (IOException e) {
+ StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
+ "Unexpected failure within task list index", e)); //$NON-NLS-1$
+ } finally {
+ try {
+ indexSearcher.close();
+ } catch (IOException e) {
+ // ignore
+ }
+ }
+ }
+ } finally {
+ readLock.unlock();
+ }
+ }
+
+ private Query computeQuery(String patternString) {
+ String upperPatternString = patternString.toUpperCase();
+
+ boolean hasBooleanSpecifiers = upperPatternString.contains(" OR ") || upperPatternString.contains(" AND ") //$NON-NLS-1$ //$NON-NLS-2$
+ || upperPatternString.contains(" NOT "); //$NON-NLS-1$
+
+ if (patternString.indexOf(':') == -1 && !hasBooleanSpecifiers && defaultField == IndexField.SUMMARY
+ && patternString.indexOf('"') == -1) {
+ return new PrefixQuery(new Term(defaultField.fieldName(), patternString));
+ }
+ QueryParser qp = new QueryParser(Version.LUCENE_CURRENT, defaultField.fieldName(), new TaskAnalyzer());
+ Query q;
+ try {
+ q = qp.parse(patternString);
+ } catch (ParseException e) {
+ return new PrefixQuery(new Term(defaultField.fieldName(), patternString));
+ }
+
+ // relax term clauses to be prefix clauses so that we get results close
+ // to what we're expecting
+ // from previous task list search
+ if (q instanceof BooleanQuery) {
+ BooleanQuery query = (BooleanQuery) q;
+ for (BooleanClause clause : query.getClauses()) {
+ if (clause.getQuery() instanceof TermQuery) {
+ TermQuery termQuery = (TermQuery) clause.getQuery();
+ clause.setQuery(new PrefixQuery(termQuery.getTerm()));
+ }
+ if (!hasBooleanSpecifiers) {
+ clause.setOccur(Occur.MUST);
+ }
+ }
+ } else if (q instanceof TermQuery) {
+ return new PrefixQuery(((TermQuery) q).getTerm());
+ }
+ return q;
+ }
+
+ public void close() {
+ dataManager.removeListener(this);
+ taskList.removeChangeListener(this);
+ repositoryManager.removeListener(this);
+
+ maintainIndexJob.cancel();
+ try {
+ maintainIndexJob.join();
+ } catch (InterruptedException e) {
+ // ignore
+ }
+
+ Lock writeLock = indexReaderLock.writeLock();
+ writeLock.lock();
+ try {
+ synchronized (this) {
+ if (indexReader != null) {
+ try {
+ indexReader.close();
+ } catch (IOException e) {
+ // ignore
+ }
+ indexReader = null;
+ }
+ }
+ try {
+ directory.close();
+ } catch (IOException e) {
+ StatusHandler.log(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
+ "Cannot close index: " + e.getMessage(), e)); //$NON-NLS-1$
+ }
+ } finally {
+ writeLock.unlock();
+ }
+ }
+
+ private IndexReader getIndexReader() {
+ try {
+ synchronized (this) {
+ if (indexReader == null) {
+ indexReader = IndexReader.open(directory, true);
+ lastResults = null;
+ }
+ return indexReader;
+ }
+ } catch (CorruptIndexException e) {
+ rebuildIndex = true;
+ if (maintainIndexJob != null) {
+ scheduleIndexMaintenance(MaintainIndexType.REINDEX);
+ }
+ } catch (FileNotFoundException e) {
+ rebuildIndex = true;
+ // expected if the index doesn't exist
+ } catch (IOException e) {
+ // ignore
+ }
+ return null;
+ }
+
+ public void taskDataUpdated(TaskDataManagerEvent event) {
+ reindex(event.getTask(), event.getTaskData());
+ }
+
+ public void editsDiscarded(TaskDataManagerEvent event) {
+ reindex(event.getTask(), event.getTaskData());
+ }
+
+ public void containersChanged(Set<TaskContainerDelta> containers) {
+ for (TaskContainerDelta delta : containers) {
+ switch (delta.getKind()) {
+ case ADDED:
+ case REMOVED:
+ case CONTENT:
+ IRepositoryElement element = delta.getElement();
+ if (element instanceof ITask) {
+ ITask task = (ITask) element;
+ if ("local".equals(((AbstractTask) task).getConnectorKind())) { //$NON-NLS-1$
+ reindex(task, null);
+ }
+ }
+ }
+ }
+ }
+
+ /**
+ * advanced usage: cause the given task to be reindexed using {@link MaintainIndexType#REINDEX reindex scheduling
+ * rule}.
+ *
+ * @param task
+ * the task
+ * @param taskData
+ * the task data, or nul if it's not available
+ */
+ protected void reindex(ITask task, TaskData taskData) {
+ if (task == null) {
+ // this can happen when edits are discarded
+ return;
+ }
+ if (!taskIsIndexable(task, taskData)) {
+ return;
+ }
+ synchronized (reindexQueue) {
+ reindexQueue.put(task, taskData);
+ }
+ scheduleIndexMaintenance(MaintainIndexType.REINDEX);
+ }
+
+ private void addIndexedAttributes(Document document, ITask task, TaskAttribute root) {
+ addIndexedAttribute(document, IndexField.TASK_KEY, task.getTaskKey());
+ addIndexedAttribute(document, IndexField.REPOSITORY_URL, task.getRepositoryUrl());
+ addIndexedAttribute(document, IndexField.SUMMARY, task.getSummary());
+
+ for (TaskAttribute contentAttribute : computeContentAttributes(root)) {
+ addIndexedAttribute(document, IndexField.CONTENT, contentAttribute);
+ }
+
+ addIndexedDateAttributes(document, task);
+
+ List<TaskAttribute> commentAttributes = root.getTaskData()
+ .getAttributeMapper()
+ .getAttributesByType(root.getTaskData(), TaskAttribute.TYPE_COMMENT);
+ for (TaskAttribute commentAttribute : commentAttributes) {
+
+ TaskComment taskComment = new TaskComment(root.getTaskData().getAttributeMapper().getTaskRepository(),
+ task, commentAttribute);
+ root.getTaskData().getAttributeMapper().updateTaskComment(taskComment, commentAttribute);
+
+ String text = taskComment.getText();
+ if (text.length() != 0) {
+ addIndexedAttribute(document, IndexField.CONTENT, text);
+ }
+ IRepositoryPerson author = taskComment.getAuthor();
+ if (author != null) {
+ addIndexedAttribute(document, IndexField.PERSON, author.getPersonId());
+ }
+ }
+
+ List<TaskAttribute> personAttributes = root.getTaskData()
+ .getAttributeMapper()
+ .getAttributesByType(root.getTaskData(), TaskAttribute.TYPE_PERSON);
+ for (TaskAttribute personAttribute : personAttributes) {
+ addIndexedAttribute(document, IndexField.PERSON, personAttribute);
+ }
+
+ for (IndexField field : IndexField.values()) {
+ if (field.getAttributeId() != null) {
+ addIndexedAttribute(document, field, root.getMappedAttribute(field.getAttributeId()));
+ }
+ }
+ }
+
+ /**
+ * compute attributes that should be indexed as {@link IndexField#CONTENT}
+ */
+ private Collection<TaskAttribute> computeContentAttributes(TaskAttribute root) {
+ Set<TaskAttribute> attributes = new LinkedHashSet<TaskAttribute>();
+
+ // add default content attributes
+ {
+ TaskAttribute attribute = root.getMappedAttribute(TaskAttribute.SUMMARY);
+ if (attribute != null) {
+ attributes.add(attribute);
+ }
+ attribute = root.getMappedAttribute(TaskAttribute.DESCRIPTION);
+ if (attribute != null) {
+ attributes.add(attribute);
+ }
+ }
+
+ for (TaskAttribute attribute : root.getAttributes().values()) {
+ if (Boolean.parseBoolean(attribute.getMetaData().getValue(META_INDEXED_AS_CONTENT))) {
+ attributes.add(attribute);
+ }
+ }
+
+ return attributes;
+ }
+
+ private void addIndexedAttributes(Document document, ITask task) {
+ addIndexedAttribute(document, IndexField.TASK_KEY, task.getTaskKey());
+ addIndexedAttribute(document, IndexField.REPOSITORY_URL, task.getRepositoryUrl());
+ addIndexedAttribute(document, IndexField.SUMMARY, task.getSummary());
+ addIndexedAttribute(document, IndexField.CONTENT, task.getSummary());
+ addIndexedAttribute(document, IndexField.CONTENT, ((AbstractTask) task).getNotes());
+ addIndexedDateAttributes(document, task);
+ }
+
+ private void addIndexedDateAttributes(Document document, ITask task) {
+ addIndexedAttribute(document, IndexField.COMPLETION_DATE, task.getCompletionDate());
+ addIndexedAttribute(document, IndexField.CREATION_DATE, task.getCreationDate());
+ addIndexedAttribute(document, IndexField.DUE_DATE, task.getDueDate());
+ addIndexedAttribute(document, IndexField.MODIFICATION_DATE, task.getModificationDate());
+ }
+
+ private void addIndexedAttribute(Document document, IndexField indexField, TaskAttribute attribute) {
+ if (attribute == null) {
+ return;
+ }
+ List<String> values = attribute.getTaskData().getAttributeMapper().getValueLabels(attribute);
+ if (values.isEmpty()) {
+ return;
+ }
+
+ if (indexField.isPersonField()) {
+ IRepositoryPerson repositoryPerson = attribute.getTaskData()
+ .getAttributeMapper()
+ .getRepositoryPerson(attribute);
+ addIndexedAttribute(document, indexField, repositoryPerson);
+
+ if (values.size() <= 1) {
+ return;
+ }
+ }
+
+ for (String value : values) {
+ if (value.length() != 0) {
+ addIndexedAttribute(document, indexField, value);
+ }
+ }
+ }
+
+ private void addIndexedAttribute(Document document, IndexField indexField, IRepositoryPerson person) {
+ if (person != null) {
+ addIndexedAttribute(document, indexField, person.getPersonId());
+ addIndexedAttribute(document, indexField, person.getName());
+ }
+ }
+
+ private void addIndexedAttribute(Document document, IndexField indexField, String value) {
+ if (value == null) {
+ return;
+ }
+ Field field = document.getField(indexField.fieldName());
+ if (field == null) {
+ field = new Field(indexField.fieldName(), value, Store.YES, org.apache.lucene.document.Field.Index.ANALYZED);
+ document.add(field);
+ } else {
+ String existingValue = field.stringValue();
+ if (indexField != IndexField.PERSON || !existingValue.contains(value)) {
+ field.setValue(existingValue + " " + value); //$NON-NLS-1$
+ }
+ }
+ }
+
+ private void addIndexedAttribute(Document document, IndexField indexField, Date date) {
+ if (date == null) {
+ return;
+ }
+ // FIXME: date tools converts dates to GMT, and we don't really want that. So
+ // move the date by the GMT offset if there is any
+
+ String value = DateTools.dateToString(date, Resolution.HOUR);
+ Field field = document.getField(indexField.fieldName());
+ if (field == null) {
+ field = new Field(indexField.fieldName(), value, Store.YES, org.apache.lucene.document.Field.Index.ANALYZED);
+ document.add(field);
+ } else {
+ field.setValue(value);
+ }
+ }
+
+ /**
+ * Computes a query element for a field that must lie in a specified date range.
+ *
+ * @param field
+ * the field
+ * @param lowerBoundInclusive
+ * the date lower bound that the field value must match, inclusive
+ * @param upperBoundInclusive
+ * the date upper bound that the field value must match, inclusive
+ * @return
+ */
+ public String computeQueryFieldDateRange(IndexField field, Date lowerBoundInclusive, Date upperBoundInclusive) {
+ return field.fieldName()
+ + ":[" + DateTools.dateToString(lowerBoundInclusive, Resolution.DAY) + " TO " + DateTools.dateToString(upperBoundInclusive, Resolution.DAY) + "]"; //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
+ }
+
+ /**
+ * Indicates if the given task is indexable. The default implementation returns true, subclasses may override to
+ * filter some tasks from the task list. This method may be called more than once per task, with some calls omitting
+ * the task data. In this way implementations can avoid loading task data if the decision to filter tasks can be
+ * based on the ITask alone. Implementations that must read the task data in order to determine eligibility for
+ * indexing should return true for tasks where the provided task data is null.
+ *
+ * @param task
+ * the task
+ * @param taskData
+ * the task data, or null if there is no task data
+ * @return true if the given task should be indexed, otherwise false.
+ */
+ protected boolean taskIsIndexable(ITask task, TaskData taskData) {
+ return true;
+ }
+
+ /**
+ * Escapes special characters in the given literal value so that they are not interpreted as special characters in a
+ * query.
+ *
+ * @param value
+ * the value to escape
+ * @return a representation of the value with characters escaped
+ */
+ public String escapeFieldValue(String value) {
+ // see http://lucene.apache.org/java/2_9_1/queryparsersyntax.html#Escaping%20Special%20Characters
+ String escaped = value.replaceAll("([\\+\\-\\!\\(\\)\\{\\}\\[\\]^\"~\\*\\?:\\\\]|&&|\\|\\|)", "\\\\$1"); //$NON-NLS-1$ //$NON-NLS-2$
+ return escaped;
+ }
+
+ private void maintainIndex(IProgressMonitor m) throws CoreException {
+ final int WORK_PER_SEGMENT = 1000;
+ SubMonitor monitor = SubMonitor.convert(m, 2 * WORK_PER_SEGMENT);
+ try {
+ try {
+ if (!rebuildIndex) {
+ try {
+ IndexReader reader = IndexReader.open(directory, false);
+ reader.close();
+ } catch (CorruptIndexException e) {
+ rebuildIndex = true;
+ }
+ }
+
+ if (rebuildIndex) {
+ synchronized (reindexQueue) {
+ reindexQueue.clear();
+ }
+
+ IStatus status = rebuildIndexCompletely(monitor.newChild(WORK_PER_SEGMENT));
+ if (!status.isOK()) {
+ StatusHandler.log(status);
+ }
+ } else {
+ monitor.worked(WORK_PER_SEGMENT);
+ }
+
+ // index any tasks that have been changed
+ indexQueuedTasks(monitor.newChild(WORK_PER_SEGMENT));
+
+ // prevent new searches from reading the now-stale index
+ closeIndexReader();
+ } catch (IOException e) {
+ throw new CoreException(new Status(IStatus.ERROR, TasksIndexCore.ID_PLUGIN,
+ "Unexpected exception: " + e.getMessage(), e)); //$NON-NLS-1$
+ }
+ } finally {
+ monitor.done();
+ }
+ }
+
+ private void closeIndexReader() throws IOException {
+ Lock writeLock = indexReaderLock.writeLock();
+ writeLock.lock();
+ try {
+ synchronized (this) {
+ if (indexReader != null) {
+ indexReader.close();
+ indexReader = null;
+ }
+ }
+ } finally {
+ writeLock.unlock();
+ }
+ }
+
+ private void indexQueuedTasks(SubMonitor monitor) throws CorruptIndexException, LockObtainFailedException,
+ IOException {
+
+ synchronized (reindexQueue) {
+ if (reindexQueue.isEmpty()) {
+ return;
+ }
+
+ monitor.beginTask(Messages.TaskListIndex_task_rebuilding_index, reindexQueue.size());
+ }
+
+ try {
+ IndexWriter writer = null;
+ try {
+ Map<ITask, TaskData> workingQueue = new HashMap<ITask, TaskData>();
+
+ // reindex tasks that are in the reindexQueue, making multiple passes so that we catch anything
+ // added/changed while we were reindexing
+ for (;;) {
+ workingQueue.clear();
+
+ synchronized (reindexQueue) {
+ if (reindexQueue.isEmpty()) {
+ break;
+ }
+ // move items from the reindexQueue to the temporary working queue
+ workingQueue.putAll(reindexQueue);
+ reindexQueue.keySet().removeAll(workingQueue.keySet());
+ }
+
+ if (writer == null) {
+ writer = new IndexWriter(directory, new TaskAnalyzer(), false,
+ IndexWriter.MaxFieldLength.UNLIMITED);
+ }
+
+ monitor.setWorkRemaining(workingQueue.size());
+
+ for (Entry<ITask, TaskData> entry : workingQueue.entrySet()) {
+ ITask task = entry.getKey();
+ TaskData taskData = entry.getValue();
+
+ writer.deleteDocuments(new Term(IndexField.IDENTIFIER.fieldName(), task.getHandleIdentifier()));
+
+ add(writer, task, taskData);
+
+ monitor.worked(1);
+ }
+ }
+ } finally {
+ if (writer != null) {
+ writer.close();
+ }
+ }
+ } finally {
+ monitor.done();
+ }
+ }
+
+ private class TaskListState implements ITaskListRunnable {
+ List<ITask> indexableTasks;
+
+ public void execute(IProgressMonitor monitor) throws CoreException {
+ Collection<AbstractTask> tasks = taskList.getAllTasks();
+ indexableTasks = new ArrayList<ITask>(tasks.size());
+
+ for (ITask task : tasks) {
+ if (taskIsIndexable(task, null)) {
+ indexableTasks.add(task);
+ }
+ }
+ }
+
+ }
+
+ private IStatus rebuildIndexCompletely(SubMonitor monitor) throws CorruptIndexException, LockObtainFailedException,
+ IOException, CoreException {
+
+ MultiStatus multiStatus = new MultiStatus(TasksIndexCore.ID_PLUGIN, 0, null, null);
+
+ // get indexable tasks from the task list
+ final TaskListState taskListState = new TaskListState();
+ taskList.run(taskListState, monitor.newChild(0));
+
+ monitor.beginTask(Messages.TaskListIndex_task_rebuilding_index, taskListState.indexableTasks.size());
+ try {
+ final IndexWriter writer = new IndexWriter(directory, new TaskAnalyzer(), true,
+ IndexWriter.MaxFieldLength.UNLIMITED);
+ try {
+
+ for (ITask task : taskListState.indexableTasks) {
+ if (taskIsIndexable(task, null)) {
+ try {
+ TaskData taskData = dataManager.getTaskData(task);
+ add(writer, task, taskData);
+ } catch (CoreException e) {
+ // an individual task data error should not prevent the index from updating
+ multiStatus.add(e.getStatus());
+ }
+ }
+ monitor.worked(1);
+ }
+ synchronized (this) {
+ rebuildIndex = false;
+ }
+ } finally {
+ writer.close();
+ }
+ } finally {
+ monitor.done();
+ }
+ return multiStatus;
+ }
+
+ /**
+ * @param writer
+ * @param task
+ * the task
+ * @param taskData
+ * may be null for local tasks
+ * @throws CorruptIndexException
+ * @throws IOException
+ */
+ private void add(IndexWriter writer, ITask task, TaskData taskData) throws CorruptIndexException, IOException {
+ if (!taskIsIndexable(task, taskData)) {
+ return;
+ }
+
+ Document document = new Document();
+
+ document.add(new Field(IndexField.IDENTIFIER.fieldName(), task.getHandleIdentifier(), Store.YES,
+ org.apache.lucene.document.Field.Index.ANALYZED));
+ if (taskData == null) {
+ if ("local".equals(((AbstractTask) task).getConnectorKind())) { //$NON-NLS-1$
+ addIndexedAttributes(document, task);
+ } else {
+ return;
+ }
+ } else {
+ addIndexedAttributes(document, task, taskData.getRoot());
+ }
+ writer.addDocument(document);
+ }
+
+ public void repositoryAdded(TaskRepository repository) {
+ // ignore
+ }
+
+ public void repositoryRemoved(TaskRepository repository) {
+ // ignore
+ }
+
+ public void repositorySettingsChanged(TaskRepository repository) {
+ // ignore
+ }
+
+ public void repositoryUrlChanged(TaskRepository repository, String oldUrl) {
+ reindex();
+ }
+}

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