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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.node;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A launcher for SCA nodes.
*
* @version $Rev$ $Date$
*/
public class NodeLauncher {
static final Logger logger = Logger.getLogger(NodeLauncher.class.getName());
/**
* Constructs a new node launcher.
*/
private NodeLauncher() {
}
/**
* Returns a new launcher instance.
*
* @return a new launcher instance
*/
public static NodeLauncher newInstance() {
return new NodeLauncher();
}
/**
* Creates a new SCA node from the configuration URL
*
* @param configurationURL the URL of the node configuration which is the ATOM feed
* that contains the URI of the composite and a collection of URLs for the contributions
*
* @return a new SCA node.
* @throws LauncherException
*/
public <T> T createNodeFromURL(String configurationURL) throws LauncherException {
return (T)node(configurationURL, null, null, null, null);
}
/**
* Creates a new SCA Node.
*
* @param compositeURI the URI of the composite to use
* @param contributions the URI of the contributions that provides the composites and related
* artifacts. If the list is empty, then we will use the thread context classloader to discover
* the contribution on the classpath
*
* @return a new SCA node.
* @throws LauncherException
*/
public <T> T createNode(String compositeURI, Contribution...contributions) throws LauncherException {
return (T)node(null, compositeURI, null, contributions, null);
}
/**
* Creates a new SCA Node.
*
* @param compositeURI the URI of the composite to use
* @param compositeContent the XML content of the composite to use
* @param contributions the URI of the contributions that provides the composites and related artifacts
* @return a new SCA node.
* @throws LauncherException
*/
public <T> T createNode(String compositeURI, String compositeContent, Contribution...contributions) throws LauncherException {
return (T)node(null, compositeURI, compositeContent, contributions, null);
}
/**
* Create a SCA node based on the discovery of the contribution on the classpath for the
* given classloader. This method should be treated a convenient shortcut with the following
* assumptions:
* <ul>
* <li>This is a standalone application and there is a deployable composite file on the classpath.
* <li>There is only one contribution which contains the deployable composite file physically in its packaging hierarchy.
* </ul>
*
* @param compositeURI The URI of the composite file relative to the root of the enclosing contribution
* @param classLoader The ClassLoader used to load the composite file as a resource. If the value is null,
* then thread context classloader will be used
* @return A newly created SCA node
*/
public <T> T createNodeFromClassLoader(String compositeURI, ClassLoader classLoader) throws LauncherException {
return (T)node(null, compositeURI, null, null, classLoader);
}
public static void main(String[] args) throws Exception {
logger.info("Apache Tuscany SCA Node is starting...");
// Create a node launcher
NodeLauncher launcher = newInstance();
Object node = null;
ShutdownThread shutdown = null;
try {
while (true) {
if (args.length ==1) {
// Create a node from a configuration URI
String configurationURI = args[0];
logger.info("SCA Node configuration: " + configurationURI);
node = launcher.createNodeFromURL(configurationURI);
} else {
// Create a node from a composite URI and a contribution location
String compositeURI = args[0];
if ("-".equals(compositeURI)) {
compositeURI = null;
} else {
logger.info("SCA composite: " + compositeURI);
}
Contribution contributions[] = new Contribution[args.length - 1];
for (int i = 1; i < args.length; i++) {
String contributionLocation = args[i];
logger.info("SCA contribution: " + contributionLocation);
contributions[i - 1] = new Contribution("contribution" + (i - 1), contributionLocation);
}
node = launcher.createNode(compositeURI, contributions);
}
// Start the node
try {
node.getClass().getMethod("start").invoke(node);
} catch (Exception e) {
logger.log(Level.SEVERE, "SCA Node could not be started", e);
throw e;
}
logger.info("SCA Node 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 is now stopped.");
} catch (Exception e) {
logger.log(Level.SEVERE, "SCA Node could not be stopped", e);
throw e;
}
}
private static class ShutdownThread extends Thread {
private Object node;
public ShutdownThread(Object node) {
super();
this.node = node;
}
public void run() {
try {
stopNode(node);
} catch (Exception e) {
// Ignore
}
}
}
}
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