/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.controller.extension;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.ParsedBootOp;
import org.jboss.dmr.ModelNode;
import static org.jboss.as.controller.ControllerLogger.MGMT_OP_LOGGER;
import static org.jboss.as.controller.ControllerMessages.MESSAGES;
/**
* Special handler that executes extension initialization in parallel.
*
* @author Brian Stansberry (c) 2011 Red Hat Inc.
*/
public class ParallelExtensionAddHandler implements OperationStepHandler {
private final ExecutorService executor;
private final List<ParsedBootOp> extensionAdds = new ArrayList<ParsedBootOp>();
public ParallelExtensionAddHandler(ExecutorService executorService) {
this.executor = executorService;
}
public void addParsedOp(final ParsedBootOp op, final ExtensionAddHandler handler) {
extensionAdds.add(new ParsedBootOp(op, handler));
}
@Override
public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
context.addStep(getParallelExtensionInitializeStep(), OperationContext.Stage.IMMEDIATE);
for (int i = extensionAdds.size() -1; i >= 0; i--) { // Reverse order so they execute in normal order!
ParsedBootOp op = extensionAdds.get(i);
context.addStep(op.response, op.operation, op.handler, OperationContext.Stage.IMMEDIATE);
}
context.stepCompleted();
}
private OperationStepHandler getParallelExtensionInitializeStep() {
return new OperationStepHandler() {
@Override
public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
long start = System.currentTimeMillis();
final Map<String, Future<OperationFailedException>> futures = new LinkedHashMap<String, Future<OperationFailedException>>();
for (ParsedBootOp op : extensionAdds) {
String module = op.address.getLastElement().getValue();
ExtensionAddHandler addHandler = ExtensionAddHandler.class.cast(op.handler);
Future<OperationFailedException> future = executor.submit(new ExtensionInitializeTask(module, addHandler));
futures.put(module, future);
}
for (Map.Entry<String, Future<OperationFailedException>> entry : futures.entrySet()) {
try {
OperationFailedException ofe = entry.getValue().get();
if (ofe != null) {
throw ofe;
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw MESSAGES.moduleInitializationInterrupted(entry.getKey());
} catch (ExecutionException e) {
throw MESSAGES.failedInitializingModule(e, entry.getKey());
}
}
if (MGMT_OP_LOGGER.isDebugEnabled()) {
long elapsed = System.currentTimeMillis() - start;
MGMT_OP_LOGGER.debugf("Initialized extensions in [%d] ms", elapsed);
}
context.stepCompleted();
}
};
}
private static class ExtensionInitializeTask implements Callable<OperationFailedException> {
private final String module;
private final ExtensionAddHandler addHandler;
public ExtensionInitializeTask(String module, ExtensionAddHandler addHandler) {
this.module = module;
this.addHandler = addHandler;
}
@Override
public OperationFailedException call() {
OperationFailedException failure = null;
try {
addHandler.initializeExtension(module);
} catch (OperationFailedException e) {
failure = e;
}
return failure;
}
}
}