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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* 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:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.core.model.cache;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import org.eclipse.osee.framework.core.enums.OseeCacheEnum;
import org.eclipse.osee.framework.core.enums.TransactionVersion;
import org.eclipse.osee.framework.core.exception.OseeCoreException;
import org.eclipse.osee.framework.core.exception.OseeStateException;
import org.eclipse.osee.framework.core.model.Branch;
import org.eclipse.osee.framework.core.model.TransactionRecord;
import org.eclipse.osee.framework.core.util.Conditions;
import org.eclipse.osee.framework.logging.OseeLog;
/**
* @author Roberto E. Escobar
*/
public class TransactionCache implements IOseeCache<String, TransactionRecord> {
private ITransactionDataAccessor accessor;
private final Map<Integer, TransactionRecord> transactionIdCache =
new ConcurrentHashMap<Integer, TransactionRecord>();
private final OseeCacheEnum cacheId;
private boolean ensurePopulatedRanOnce;
private long lastLoaded;
public TransactionCache() {
this.lastLoaded = 0;
this.cacheId = OseeCacheEnum.TRANSACTION_CACHE;
this.ensurePopulatedRanOnce = false;
}
public void setAccessor(ITransactionDataAccessor accessor) {
this.accessor = accessor;
}
protected ITransactionDataAccessor getDataAccessor() {
return accessor;
}
@Override
public void cache(TransactionRecord... types) throws OseeCoreException {
Conditions.checkNotNull(types, "types to cache");
for (TransactionRecord type : types) {
cache(type);
}
}
@Override
public void cache(TransactionRecord type) throws OseeCoreException {
Conditions.checkNotNull(type, "type to cache");
ensurePopulated();
transactionIdCache.put(type.getId(), type);
}
@Override
public void decache(TransactionRecord... types) throws OseeCoreException {
Conditions.checkNotNull(types, "types to de-cache");
for (TransactionRecord type : types) {
decache(type);
}
}
@Override
public void decache(TransactionRecord type) throws OseeCoreException {
Conditions.checkNotNull(type, "type to de-cache");
ensurePopulated();
if (type.isIdValid()) {
transactionIdCache.remove(type.getId());
}
}
@Override
public Collection<TransactionRecord> getAll() throws OseeCoreException {
ensurePopulated();
return new ArrayList<TransactionRecord>(transactionIdCache.values());
}
public TransactionRecord getOrLoad(int txId) throws OseeCoreException {
TransactionRecord transactionRecord = getById(txId);
if (transactionRecord == null) {
loadTransactions(Collections.singletonList(txId));
transactionRecord = getById(txId);
if (transactionRecord == null) {
throw new OseeStateException("Transaction Record[%s] was not found", txId);
}
}
return transactionRecord;
}
@Override
public TransactionRecord getById(int txId) throws OseeCoreException {
ensurePopulated();
return transactionIdCache.get(txId);
}
@Override
public TransactionRecord getByGuid(String guid) throws OseeCoreException {
throw new OseeStateException("TransactionCache.getByGuid() is not implemented...");
}
@Override
public OseeCacheEnum getCacheId() {
return cacheId;
}
@Override
public int size() {
return transactionIdCache.size();
}
@Override
public Collection<TransactionRecord> getAllDirty() {
Set<TransactionRecord> dirtys = new HashSet<TransactionRecord>();
for (TransactionRecord record : transactionIdCache.values()) {
if (record.isDirty()) {
dirtys.add(record);
}
}
return dirtys;
}
@Override
public void storeAllModified() {
}
@Override
public void storeItems(TransactionRecord... items) {
}
@Override
public void storeItems(Collection<TransactionRecord> toStore) {
}
public TransactionRecord getPriorTransaction(TransactionRecord transactionId) throws OseeCoreException {
return getDataAccessor().getOrLoadPriorTransaction(this, transactionId.getId(), transactionId.getBranchId());
}
public TransactionRecord getTransaction(Branch branch, TransactionVersion revision) throws OseeCoreException {
TransactionRecord toReturn = null;
if (TransactionVersion.BASE == revision) {
toReturn = branch.getBaseTransaction();
}
if (toReturn == null) {
toReturn = getDataAccessor().loadTransactionRecord(this, branch, revision);
}
return toReturn;
}
public Collection<TransactionRecord> getTransactions(Branch branch) {
return Collections.emptyList();
}
public void loadTransactions(Collection<Integer> transactionIds) throws OseeCoreException {
ensurePopulated();
getDataAccessor().loadTransactionRecord(this, transactionIds);
}
@Override
public synchronized void ensurePopulated() throws OseeCoreException {
if (!ensurePopulatedRanOnce) {
ensurePopulatedRanOnce = true;
reloadCache();
}
}
@Override
public long getLastLoaded() {
return lastLoaded;
}
private synchronized void setLastLoaded(long lastLoaded) {
this.lastLoaded = lastLoaded;
}
@Override
public synchronized boolean reloadCache() throws OseeCoreException {
getDataAccessor().load(this);
OseeLog.log(this.getClass(), Level.INFO, "Loaded " + getCacheId().toString().toLowerCase());
setLastLoaded(System.currentTimeMillis());
return true;
}
@Override
public void decacheAll() {
transactionIdCache.clear();
this.ensurePopulatedRanOnce = false;
}
}
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