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/*
* 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.tuscany.sca.node.launcher;
import static org.apache.tuscany.sca.node.launcher.NodeLauncherUtil.nodeDaemon;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A launcher for the SCA Node daemon.
*
* @version $Rev$ $Date$
*/
public class NodeDaemonLauncher {
static final Logger logger = Logger.getLogger(NodeDaemonLauncher.class.getName());
/**
* Constructs a new node daemon launcher.
*/
private NodeDaemonLauncher() {
}
/**
* Returns a new launcher instance.
*
* @return a new launcher instance
*/
public static NodeDaemonLauncher newInstance() {
return new NodeDaemonLauncher();
}
/**
* Creates a new node daemon.
*
* @param
* @return a new node daemon
* @throws LauncherException
*/
public <T> T createNodeDaemon() throws LauncherException {
return (T)nodeDaemon();
}
public static void main(String[] args) throws Exception {
logger.info("Apache Tuscany SCA Node Daemon is starting...");
// Create a node launcher
NodeDaemonLauncher launcher = newInstance();
Object node = null;
ShutdownThread shutdown = null;
try {
while (true) {
// Start the node
node = launcher.createNodeDaemon();
try {
node.getClass().getMethod("start").invoke(node);
} catch (Exception e) {
logger.log(Level.SEVERE, "SCA Node Daemon could not be started", e);
throw e;
}
logger.info("SCA Node Daemon is now started.");
// Install a shutdown hook
shutdown = new ShutdownThread(node);
Runtime.getRuntime().addShutdownHook(shutdown);
logger.info("Press 'q' to quit, 'r' to restart.");
int k = 0;
try {
while ((k != 'q') && (k != 'r')) {
k = System.in.read();
}
} catch (IOException e) {
// Wait forever
Object lock = new Object();
synchronized(lock) {
lock.wait();
}
}
// Stop the node
if (node != null) {
Object n = node;
node = null;
stopNode(n);
}
// Quit
if (k == 'q' ) {
break;
}
}
} catch (Exception e) {
// Stop the node
if (node != null) {
try {
Object n = node;
node = null;
stopNode(n);
} catch (Exception e2) {
}
}
throw e;
} finally {
// Remove the shutdown hook
if (shutdown != null) {
Runtime.getRuntime().removeShutdownHook(shutdown);
}
}
}
/**
* Stop the given node.
*
* @param node
* @throws Exception
*/
private static void stopNode(Object node) throws Exception {
try {
node.getClass().getMethod("stop").invoke(node);
logger.info("SCA Node Daemon is now stopped.");
} catch (Exception e) {
logger.log(Level.SEVERE, "SCA Node Daemon could not be stopped", e);
throw e;
}
}
private static class ShutdownThread extends Thread {
private Object node;
public ShutdownThread(Object node) {
super();
this.node = node;
}
@Override
public void run() {
try {
stopNode(node);
} catch (Exception e) {
// Ignore
}
}
}
}
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