/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.geronimo.blueprint;
import java.util.Hashtable;
import java.util.concurrent.CountDownLatch;
import org.apache.geronimo.gbean.annotation.GBean;
import org.apache.geronimo.gbean.annotation.ParamSpecial;
import org.apache.geronimo.gbean.annotation.Priority;
import org.apache.geronimo.gbean.annotation.SpecialAttributeType;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.blueprint.container.BlueprintEvent;
import org.osgi.service.blueprint.container.BlueprintListener;
/**
* Blueprint starts beans asynchornously whereas geronimo starts configurations in a single thread.
* This bean waits for the blueprint activity to complete before returning.
*
* @version $Rev: 938534 $ $Date: 2010-04-27 12:05:19 -0400 (Tue, 27 Apr 2010) $
*/
@GBean
@Priority(priority = 2)
public class WaitForBlueprintGBean {
private volatile BlueprintEvent event;
private CountDownLatch latch = new CountDownLatch(1);
public WaitForBlueprintGBean(@ParamSpecial(type= SpecialAttributeType.bundleContext)BundleContext bundleContext) throws Exception {
final Bundle bundle = bundleContext.getBundle();
BlueprintListener listener = new BlueprintListener() {
@Override
public void blueprintEvent(BlueprintEvent event) {
if (event.getBundle() == bundle) {
if (event.getType() == BlueprintEvent.CREATED || event.getType() == BlueprintEvent.FAILURE) {
WaitForBlueprintGBean.this.event = event;
latch.countDown();
}
}
}
};
ServiceRegistration registration = bundleContext.registerService(BlueprintListener.class.getName(), listener, new Hashtable());
latch.await();
registration.unregister();
if (event.getType() == BlueprintEvent.FAILURE) {
throw new Exception("Could not start blueprint plan", event.getCause());
}
}
}