/*******************************************************************************
* * Copyright 2012 Impetus Infotech.
* *
* * 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.
******************************************************************************/
package com.impetus.kundera.persistence;
import java.util.HashMap;
import java.util.Map;
import com.impetus.kundera.persistence.KunderaEntityTransaction.TxAction;
import com.impetus.kundera.persistence.TransactionResource.Response;
/**
* @author vivek
*
*/
class Coordinator
{
// private List<TransactionResource> txResources = new
// ArrayList<TransactionResource>();
private Map<String, TransactionResource> txResources = new HashMap<String, TransactionResource>();
public Coordinator()
{
}
void addResource(TransactionResource resource, final String pu)
{
txResources.put(pu, resource);
}
TransactionResource getResource(final String pu)
{
return txResources.get(pu);
}
Response coordinate(TxAction action)
{
Response response = Response.YES;
switch (action)
{
case BEGIN:
for (TransactionResource res : txResources.values())
{
res.onBegin();
}
break;
case PREPARE:
// TODO:: need to handle case of two phase commit, in case of
// polyglot persistence.
for (TransactionResource res : txResources.values())
{
res.prepare();
}
break;
case COMMIT:
for (TransactionResource res : txResources.values())
{
res.onCommit();
}
break;
case ROLLBACK:
for (TransactionResource res : txResources.values())
{
res.onRollback();
}
break;
default:
throw new IllegalArgumentException("Invalid transaction action : " + action);
}
return response;
}
boolean isTransactionActive()
{
for (TransactionResource res : txResources.values())
{
if (res.isActive())
{
return true;
}
}
return false;
}
}