/*
* 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.aries.transaction.internal;
import java.io.IOException;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.Hashtable;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceReference;
import org.osgi.service.cm.Configuration;
import org.osgi.service.cm.ConfigurationAdmin;
import org.osgi.service.cm.ConfigurationException;
import org.osgi.service.cm.ManagedService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.aries.transaction.internal.TransactionManagerService.DEFAULT_RECOVERABLE;
import static org.apache.aries.transaction.internal.TransactionManagerService.RECOVERABLE;
/**
*/
public class Activator implements BundleActivator, ManagedService {
public static final String PID = "org.apache.aries.transaction";
private static final Logger log = LoggerFactory.getLogger(PID);
private BundleContext bundleContext;
private TransactionManagerService manager;
private Dictionary<String, ?> properties;
public void start(BundleContext bundleContext) throws Exception {
this.bundleContext = bundleContext;
// Make sure TransactionManager comes up even if no config admin is installed
Dictionary<String, Object> properties = getInitialConfig();
updated(properties);
bundleContext.registerService(ManagedService.class.getName(), this, getProps());
}
private Dictionary<String, Object> getInitialConfig() {
try {
ServiceReference<ConfigurationAdmin> ref = bundleContext.getServiceReference(ConfigurationAdmin.class);
if (ref != null) {
ConfigurationAdmin configurationAdmin = bundleContext.getService(ref);
if (configurationAdmin != null) {
try {
Configuration config = configurationAdmin.getConfiguration(PID);
return config.getProperties();
} finally {
bundleContext.ungetService(ref);
}
}
}
} catch (Exception e) {
// Ignore
}
return null;
}
private Dictionary<String, Object> getProps() {
Dictionary<String, Object> props = new Hashtable<String, Object>();
props.put(Constants.SERVICE_PID, PID);
return props;
}
public void stop(BundleContext context) throws Exception {
deleted();
}
@SuppressWarnings("unchecked")
public synchronized void updated(Dictionary<String, ?> properties) throws ConfigurationException {
if (properties == null) {
properties = getProps();
}
if (!equals(this.properties, properties)) {
deleted();
// ARIES-1719 - copy tx log with different configuration
// we can move active transactions (LogRecordType.XACOMMIT without XADONE)
// to different tx log
try {
if (TransactionManagerService.getBool(properties, RECOVERABLE, DEFAULT_RECOVERABLE)) {
TransactionLogUtils.copyActiveTransactions((Dictionary<String, Object>) this.properties, properties);
}
} catch (IOException e) {
log.error(NLS.MESSAGES.getMessage("exception.tx.manager.start"), e);
}
this.properties = properties;
manager = new TransactionManagerService(PID, properties, bundleContext);
try {
manager.start();
} catch (Exception e) {
log.error(NLS.MESSAGES.getMessage("exception.tx.manager.start"), e);
}
}
}
private boolean equals(Dictionary<String, ?> d1, Dictionary<String, ?> d2) {
if (d1 == d2) {
return true;
} else if (d1 == null ^ d2 == null) {
return false;
} else if (d1.size() != d2.size()) {
return false;
} else {
for (Enumeration<String> e1 = d1.keys(); e1.hasMoreElements();) {
String key = e1.nextElement();
Object v1 = d1.get(key);
Object v2 = d2.get(key);
if (v1 != v2 && (v2 == null || !v2.equals(v1))) {
return false;
}
}
return true;
}
}
public synchronized void deleted() {
if (manager != null) {
try {
manager.close();
} catch (Exception e) {
log.error(NLS.MESSAGES.getMessage("exception.tx.manager.stop"), e);
} finally {
manager = null;
}
}
}
}