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/*
*
* * Copyright 2010-2016 OrientDB LTD (http://orientdb.com)
* *
* * Licensed under the Apache License, Version 2.0 (the "License");
* * you may not use this file except in compliance with the License.
* * You may obtain a copy of the License at
* *
* * http://www.apache.org/licenses/LICENSE-2.0
* *
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS,
* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* * See the License for the specific language governing permissions and
* * limitations under the License.
* *
* * For more information: http://orientdb.com
*
*/
package com.tinkerpop.blueprints.impls.orient;
import com.orientechnologies.common.log.OLogManager;
import com.orientechnologies.orient.core.db.ODatabaseDocumentInternal;
import com.orientechnologies.orient.core.db.OPartitionedDatabasePool;
import com.orientechnologies.orient.core.exception.OTransactionException;
import com.orientechnologies.orient.core.tx.OTransaction.TXSTATUS;
import com.orientechnologies.orient.core.tx.OTransactionNoTx;
import com.tinkerpop.blueprints.TransactionalGraph;
import org.apache.commons.configuration.Configuration;
/**
* A Blueprints implementation of the graph database OrientDB (http://orientdb.com)
*
* @author Luca Garulli (l.garulli--(at)--orientdb.com) (http://orientdb.com)
*/
public abstract class OrientTransactionalGraph extends OrientBaseGraph
implements TransactionalGraph {
/**
* Constructs a new object using an existent database instance.
*
* @param iDatabase Underlying database object to attach
*/
protected OrientTransactionalGraph(final ODatabaseDocumentInternal iDatabase) {
this(iDatabase, true, null, null);
}
protected OrientTransactionalGraph(
final ODatabaseDocumentInternal iDatabase,
final String iUserName,
final String iUserPasswd,
final Settings iConfiguration) {
super(iDatabase, iUserName, iUserPasswd, iConfiguration);
setCurrentGraphInThreadLocal();
super.setAutoStartTx(isAutoStartTx());
if (isAutoStartTx()) ensureTransaction();
}
protected OrientTransactionalGraph(
final ODatabaseDocumentInternal iDatabase,
final boolean iAutoStartTx,
final String iUserName,
final String iUserPasswd) {
super(iDatabase, iUserName, iUserPasswd, null);
setCurrentGraphInThreadLocal();
super.setAutoStartTx(iAutoStartTx);
if (iAutoStartTx) ensureTransaction();
}
protected OrientTransactionalGraph(final OPartitionedDatabasePool pool) {
super(pool);
setCurrentGraphInThreadLocal();
ensureTransaction();
}
protected OrientTransactionalGraph(
final OPartitionedDatabasePool pool, final Settings configuration) {
super(pool, configuration);
setCurrentGraphInThreadLocal();
if (configuration.isAutoStartTx()) ensureTransaction();
}
protected OrientTransactionalGraph(final String url) {
this(url, true);
}
protected OrientTransactionalGraph(final String url, final boolean iAutoStartTx) {
super(url, ADMIN, ADMIN);
setCurrentGraphInThreadLocal();
setAutoStartTx(iAutoStartTx);
if (iAutoStartTx) ensureTransaction();
}
protected OrientTransactionalGraph(
final String url, final String username, final String password) {
this(url, username, password, true);
}
protected OrientTransactionalGraph(
final String url, final String username, final String password, final boolean iAutoStartTx) {
super(url, username, password);
setCurrentGraphInThreadLocal();
this.setAutoStartTx(iAutoStartTx);
if (iAutoStartTx) ensureTransaction();
}
protected OrientTransactionalGraph(final Configuration configuration) {
super(configuration);
final Boolean autoStartTx = configuration.getBoolean("blueprints.orientdb.autoStartTx", null);
if (autoStartTx != null) setAutoStartTx(autoStartTx);
}
public boolean isUseLog() {
makeActive();
return settings.isUseLog();
}
public OrientTransactionalGraph setUseLog(final boolean useLog) {
makeActive();
settings.setUseLog(useLog);
return this;
}
@Override
public void setAutoStartTx(boolean autoStartTx) {
makeActive();
final boolean showWarning;
if (!autoStartTx
&& isAutoStartTx()
&& getDatabase() != null
&& getDatabase().getTransaction().isActive()) {
if (getDatabase().getTransaction().getEntryCount() == 0) {
getDatabase().getTransaction().rollback();
showWarning = false;
} else showWarning = true;
} else showWarning = false;
super.setAutoStartTx(autoStartTx);
if (showWarning)
OLogManager.instance()
.warn(
this,
"Auto Transaction for graphs setting has been turned off, but a transaction was already started."
+ " Commit it manually or consider disabling auto transactions while creating the graph.");
}
/**
* Closes a transaction.
*
* @param conclusion Can be SUCCESS for commit and FAILURE to rollback.
*/
@SuppressWarnings("deprecation")
@Override
public void stopTransaction(final Conclusion conclusion) {
makeActive();
if (getDatabase().isClosed()
|| getDatabase().getTransaction() instanceof OTransactionNoTx
|| getDatabase().getTransaction().getStatus() != TXSTATUS.BEGUN) return;
if (Conclusion.SUCCESS == conclusion) commit();
else rollback();
}
/** Commits the current active transaction. */
public void commit() {
makeActive();
if (getDatabase() == null) return;
getDatabase().commit();
if (isAutoStartTx()) ensureTransaction();
}
/** Rollbacks the current active transaction. All the pending changes are rollbacked. */
public void rollback() {
makeActive();
if (getDatabase() == null) return;
getDatabase().rollback();
if (isAutoStartTx()) ensureTransaction();
}
@Override
public void begin() {
makeActive();
// XXX: Under some circumstances, auto started transactions are committed outside of the graph
// using the
// underlying database and later restarted using the graph. So we have to check the status of
// the
// database transaction to support this behaviour.
if (isAutoStartTx() && getDatabase().getTransaction().isActive())
throw new OTransactionException(
"A mixture of auto started and manually started transactions is not allowed. "
+ "Disable auto transactions for the graph before starting a manual transaction.");
getDatabase().begin();
getDatabase().getTransaction().setUsingLog(settings.isUseLog());
}
@Override
protected void autoStartTransaction() {
final boolean txBegun = getDatabase().getTransaction().isActive();
if (!isAutoStartTx()) {
if (isRequireTransaction() && !txBegun)
throw new OTransactionException("Transaction required to change the Graph");
return;
}
if (!txBegun) {
getDatabase().begin();
getDatabase().getTransaction().setUsingLog(settings.isUseLog());
}
}
private void ensureTransaction() {
final boolean txBegun = getDatabase().getTransaction().isActive();
if (!txBegun) {
getDatabase().begin();
getDatabase().getTransaction().setUsingLog(settings.isUseLog());
}
}
}
