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Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.6.2/modules/node-launcher/src/main/java/org/apache/tuscany/sca/node/launcher/NodeLauncher.java')
| -rw-r--r-- | sca-java-1.x/branches/sca-java-1.6.2/modules/node-launcher/src/main/java/org/apache/tuscany/sca/node/launcher/NodeLauncher.java | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/node-launcher/src/main/java/org/apache/tuscany/sca/node/launcher/NodeLauncher.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/node-launcher/src/main/java/org/apache/tuscany/sca/node/launcher/NodeLauncher.java new file mode 100644 index 0000000000..74d47ceb55 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/node-launcher/src/main/java/org/apache/tuscany/sca/node/launcher/NodeLauncher.java @@ -0,0 +1,238 @@ +/* + * 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 + } + } + } +} |