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/*******************************************************************************
* Copyright (c) 2004, 2009 Tasktop Technologies and others.
* 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.provisional.tasks.core;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.mylyn.commons.core.StatusHandler;
import org.eclipse.mylyn.internal.tasks.core.ITasksCoreConstants;
import org.eclipse.mylyn.tasks.core.IRepositoryListener;
import org.eclipse.mylyn.tasks.core.TaskRepository;
import org.eclipse.mylyn.tasks.core.TaskRepositoryLocationFactory;
/**
* TODO: fix class loading problems caused by serialization and make API
*
* @author Steffen Pingel
*/
abstract class RepositoryClientManager<T, C extends Serializable> implements IRepositoryListener {
private final Map<String, T> clientByUrl = new HashMap<String, T>();
private final Map<String, C> clientDataByUrl = new HashMap<String, C>();
private final File cacheFile;
private TaskRepositoryLocationFactory taskRepositoryLocationFactory;
public RepositoryClientManager(File cacheFile) {
Assert.isNotNull(cacheFile);
this.cacheFile = cacheFile;
readCache();
}
public synchronized T getClient(TaskRepository taskRepository) {
Assert.isNotNull(taskRepository);
T client = clientByUrl.get(taskRepository.getRepositoryUrl());
if (client == null) {
C data = clientDataByUrl.get(taskRepository.getRepositoryUrl());
if (data == null) {
data = createRepositoryConfiguration();
clientDataByUrl.put(taskRepository.getRepositoryUrl(), data);
}
client = createClient(taskRepository, data);
clientByUrl.put(taskRepository.getRepositoryUrl(), client);
}
return client;
}
protected abstract C createRepositoryConfiguration();
protected abstract T createClient(TaskRepository taskRepository, C data);
public void repositoriesRead() {
// ignore
}
public synchronized void repositoryAdded(TaskRepository repository) {
removeClient(repository);
clientDataByUrl.remove(repository.getRepositoryUrl());
}
private void removeClient(TaskRepository repository) {
clientByUrl.remove(repository.getRepositoryUrl());
}
public synchronized void repositoryRemoved(TaskRepository repository) {
removeClient(repository);
clientDataByUrl.remove(repository.getRepositoryUrl());
}
public synchronized void repositorySettingsChanged(TaskRepository repository) {
removeClient(repository);
}
@SuppressWarnings("unchecked")
public void readCache() {
if (cacheFile == null || !cacheFile.exists()) {
return;
}
ObjectInputStream in = null;
try {
in = new ObjectInputStream(new FileInputStream(cacheFile));
int size = in.readInt();
for (int i = 0; i < size; i++) {
String url = (String) in.readObject();
C data = (C) in.readObject();
if (url != null && data != null) {
clientDataByUrl.put(url, data);
}
}
} catch (Throwable e) {
StatusHandler.log(new Status(IStatus.WARNING, ITasksCoreConstants.ID_PLUGIN,
"The respository configuration cache could not be read", e)); //$NON-NLS-1$
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
// ignore
}
}
}
}
public void writeCache() {
if (cacheFile == null) {
return;
}
ObjectOutputStream out = null;
try {
out = new ObjectOutputStream(new FileOutputStream(cacheFile));
out.writeInt(clientDataByUrl.size());
for (String url : clientDataByUrl.keySet()) {
out.writeObject(url);
out.writeObject(clientDataByUrl.get(url));
}
} catch (IOException e) {
StatusHandler.log(new Status(IStatus.WARNING, ITasksCoreConstants.ID_PLUGIN,
"The respository configuration cache could not be written", e)); //$NON-NLS-1$
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
// ignore
}
}
}
}
public TaskRepositoryLocationFactory getTaskRepositoryLocationFactory() {
return taskRepositoryLocationFactory;
}
public void setTaskRepositoryLocationFactory(TaskRepositoryLocationFactory taskRepositoryLocationFactory) {
this.taskRepositoryLocationFactory = taskRepositoryLocationFactory;
}
public void repositoryUrlChanged(TaskRepository repository, String oldUrl) {
// ignore
}
}
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