/*
* 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.karaf.cellar.hazelcast.factory;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import com.hazelcast.config.Config;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;
import org.apache.karaf.cellar.core.utils.CombinedClassLoader;
import org.osgi.framework.BundleContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A factory for a Hazelcast Instance, which integration with OSGi Service Registry and Config Admin.
*/
public class HazelcastServiceFactory {
private static final transient Logger LOGGER = LoggerFactory.getLogger(HazelcastServiceFactory.class);
private BundleContext bundleContext;
private CombinedClassLoader combinedClassLoader;
private HazelcastConfigurationManager configurationManager = new HazelcastConfigurationManager();
private CountDownLatch initializationLatch = new CountDownLatch(1);
private CountDownLatch instnaceLatch = new CountDownLatch(1);
private HazelcastInstance instance;
public void init() {
if (combinedClassLoader != null) {
combinedClassLoader.addBundle(bundleContext.getBundle());
}
initializationLatch.countDown();
}
public void destroy() {
if (instance != null) {
instance.getLifecycleService().shutdown();
}
}
public void update(Map properties) throws InterruptedException {
LOGGER.info("Instance configuration updated. Checking if instance requires restarting.");
if(configurationManager.isUpdated(properties)) {
instnaceLatch.await();
Config updatedConfig = configurationManager.getHazelcastConfig();
instance.getConfig().setNetworkConfig(updatedConfig.getNetworkConfig());
instance.getConfig().setGroupConfig(updatedConfig.getGroupConfig());
LOGGER.info("Restaring Hazelcast instance.");
instance.getLifecycleService().restart();
}
}
/**
* Returs a Hazelcast instance from service registry.
*
* @return
*/
public HazelcastInstance getInstance() throws InterruptedException {
if (instance == null) {
initializationLatch.await();
this.instance = buildInstance();
instnaceLatch.countDown();
}
return instance;
}
/**
* Builds a {@link HazelcastInstance}
*
* @return
*/
private HazelcastInstance buildInstance() {
if(combinedClassLoader != null) {
Thread.currentThread().setContextClassLoader(combinedClassLoader);
}
return Hazelcast.newHazelcastInstance(configurationManager.getHazelcastConfig());
}
public BundleContext getBundleContext() {
return bundleContext;
}
public void setBundleContext(BundleContext bundleContext) {
this.bundleContext = bundleContext;
}
public CombinedClassLoader getCombinedClassLoader() {
return combinedClassLoader;
}
public void setCombinedClassLoader(CombinedClassLoader combinedClassLoader) {
this.combinedClassLoader = combinedClassLoader;
}
}