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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.osgi.launcher;
import static org.apache.tuscany.sca.node.osgi.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 OSGi 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 OSGi 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 OSGi Node is starting...");
// Create a node
NodeLauncher launcher = newInstance();
OSGiHost host = NodeLauncherUtil.startOSGi();
try {
Object node;
if (args.length == 1) {
// Create from a configuration URI
String configurationURI = args[0];
logger.info("SCA OSGi Node configuration: " + configurationURI);
node = launcher.createNodeFromURL(configurationURI);
} else {
// Create from a composite URI and a contribution location
String compositeURI = args[0];
String contributionLocation = args[1];
logger.info("SCA composite: " + compositeURI);
logger.info("SCA contribution: " + contributionLocation);
node = launcher.createNode(compositeURI, new Contribution("default", contributionLocation));
}
// Start the node
try {
node.getClass().getMethod("start").invoke(node);
} catch (Exception e) {
logger.log(Level.SEVERE, "SCA OSGi Node could not be started", e);
throw e;
}
logger.info("SCA OSGi Node is now started.");
logger.info("Press Enter to shutdown...");
try {
System.in.read();
} catch (IOException e) {
}
// Stop the node
try {
node.getClass().getMethod("stop").invoke(node);
} catch (Exception e) {
logger.log(Level.SEVERE, "SCA OSGi Node could not be stopped", e);
throw e;
}
} finally {
NodeLauncherUtil.stopOSGi(host);
}
}
}
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