src/org/apache/kandula/participant/at/ParticipantTransactionCoordinator.java

/*
 * Copyright  2004 The Apache Software Foundation.
 *
 *  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 org.apache.kandula.participant.at;

import org.apache.kandula.Status;
import org.apache.kandula.context.AbstractContext;
import org.apache.kandula.context.impl.ParticipantContext;
import org.apache.kandula.faults.AbstractKandulaException;
import org.apache.kandula.faults.InvalidStateException;
import org.apache.kandula.wsat.twopc.CoordinatorPortTypeRawXMLStub;

public class ParticipantTransactionCoordinator {

	public void prepare(AbstractContext context)
			throws AbstractKandulaException {
		CoordinatorPortTypeRawXMLStub stub;
		ParticipantContext atContext = (ParticipantContext) context;
		atContext.lock();
		switch (context.getStatus()) {
		case (Status.CoordinatorStatus.STATUS_NONE):
			atContext.unlock();
			stub = new CoordinatorPortTypeRawXMLStub(atContext
					.getCoordinationEPR());
			stub.abortedOperation();
			break;
		case (Status.CoordinatorStatus.STATUS_PREPARING):
		case (Status.CoordinatorStatus.STATUS_PREPARED):
		case (Status.CoordinatorStatus.STATUS_COMMITTING):
			// Ignore the message
			atContext.unlock();
			break;
		case (Status.CoordinatorStatus.STATUS_PREPARED_SUCCESS):
			atContext.unlock();
			stub = new CoordinatorPortTypeRawXMLStub(atContext
					.getCoordinationEPR());
			stub.preparedOperation();
			break;
		case (Status.CoordinatorStatus.STATUS_ACTIVE):
			atContext.setStatus(Status.CoordinatorStatus.STATUS_PREPARING);
			atContext.unlock();
			KandulaAtomicResource resource = (KandulaAtomicResource)atContext.getResource();
			Vote vote = resource.prepare();
			stub = new CoordinatorPortTypeRawXMLStub(atContext
					.getCoordinationEPR());
			if (vote == Vote.ABORT) {
				stub.abortedOperation();
			} else if (vote == Vote.PREPARED) {
				stub.preparedOperation();
			} else if (vote == Vote.READ_ONLY) {
				stub.readOnlyOperation();
			}
			break;
		default:
			context.unlock();
			throw new InvalidStateException();
		}
	}

	public void commit(AbstractContext context) throws AbstractKandulaException {
		ParticipantContext atContext = (ParticipantContext) context;
		boolean outcome = ((KandulaAtomicResource)atContext.getResource()).commit();
		CoordinatorPortTypeRawXMLStub stub = new CoordinatorPortTypeRawXMLStub(
				atContext.getCoordinationEPR());
		if (outcome) {
			stub.committedOperation();
		} else {
			stub.abortedOperation();
		}
		// ATParticipantContext atContext = (ATParticipantContext) context;
		// atContext.lock();
		// switch (context.getStatus()) {
		// case (Status.CoordinatorStatus.STATUS_NONE):
		// //TODO send aborted
		// atContext.unlock();
		// return Vote.ABORT;
		// case (Status.CoordinatorStatus.STATUS_PREPARING):
		// case (Status.CoordinatorStatus.STATUS_PREPARED):
		// case (Status.CoordinatorStatus.STATUS_COMMITTING):
		// //Ignore the message
		// atContext.unlock();
		// return Vote.NONE;
		// case (Status.CoordinatorStatus.STATUS_PREPARED_SUCCESS):
		// atContext.unlock();
		// return Vote.PREPARED;
		// case (Status.CoordinatorStatus.STATUS_ACTIVE):
		// atContext.setStatus(Status.CoordinatorStatus.STATUS_PREPARING);
		// KandulaResource resource = atContext.getResource();
		// return resource.prepare();
		// default:
		// context.unlock();
		// throw new InvalidStateException();
		// }
	}

	public void rollback(AbstractContext context) throws AbstractKandulaException {
		ParticipantContext atContext = (ParticipantContext) context;
		((KandulaAtomicResource)atContext.getResource()).rollback();
		CoordinatorPortTypeRawXMLStub stub = new CoordinatorPortTypeRawXMLStub(
				atContext.getCoordinationEPR());
		stub.abortedOperation();
	}

}