Initial checkin of example loadbalancing app

12 files changed, 374 insertions, 0 deletions

diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.classpath b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.classpath
new file mode 100644
index 000000000..64c5e31b7
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.classpath
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.project b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.project
new file mode 100644
index 000000000..bf577ae43
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.project
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.eclipse.ecf.examples.loadbalancing.servicehost</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.api.tools.apiAnalysisBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.pde.api.tools.apiAnalysisNature</nature>
+	</natures>
+</projectDescription>
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.settings/org.eclipse.jdt.core.prefs b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 000000000..89fb0efd3
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,8 @@
+#Mon Oct 19 11:04:06 PDT 2009
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
+org.eclipse.jdt.core.compiler.compliance=1.5
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.5
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.settings/org.eclipse.pde.core.prefs b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.settings/org.eclipse.pde.core.prefs
new file mode 100644
index 000000000..4dfff9304
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/.settings/org.eclipse.pde.core.prefs
@@ -0,0 +1,4 @@
+#Mon Oct 19 11:18:36 PDT 2009
+eclipse.preferences.version=1
+pluginProject.extensions=true
+resolve.requirebundle=false
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/META-INF/MANIFEST.MF b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/META-INF/MANIFEST.MF
new file mode 100644
index 000000000..1d0ae9e0f
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/META-INF/MANIFEST.MF
@@ -0,0 +1,20 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: %bundleName
+Bundle-SymbolicName: org.eclipse.ecf.examples.loadbalancing.servicehost;singleton:=true
+Bundle-Version: 1.0.0.qualifier
+Bundle-Activator: org.eclipse.ecf.internal.examples.loadbalancing.servicehost.Activator
+Bundle-Vendor: %bundleProvider
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
+Import-Package: org.eclipse.ecf.core,
+ org.eclipse.ecf.core.identity;version="3.0.0",
+ org.eclipse.ecf.examples.loadbalancing,
+ org.eclipse.ecf.remoteservice,
+ org.eclipse.equinox.app;version="1.0.0",
+ org.osgi.framework;version="1.3.0",
+ org.osgi.util.tracker
+Bundle-ActivationPolicy: lazy
+Bundle-Localization: bundle
+Export-Package: org.eclipse.ecf.internal.examples.loadbalancing.servicehost;x-internal:=true
+Require-Bundle: org.eclipse.equinox.common;bundle-version="3.5.1"
+
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/about.html b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/about.html
new file mode 100644
index 000000000..4c79781a5
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/about.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
+<title>About</title>
+</head>
+<body lang="EN-US">
+<h2>About This Content</h2>
+ 
+<p>June 25, 2008</p>	
+<h3>License</h3>
+
+<p>The Eclipse Foundation makes available all content in this plug-in (&quot;Content&quot;).  Unless otherwise 
+indicated below, the Content is provided to you under the terms and conditions of the
+Eclipse Public License Version 1.0 (&quot;EPL&quot;).  A copy of the EPL is available 
+at <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a>.
+For purposes of the EPL, &quot;Program&quot; will mean the Content.</p>
+
+<p>If you did not receive this Content directly from the Eclipse Foundation, the Content is 
+being redistributed by another party (&quot;Redistributor&quot;) and different terms and conditions may
+apply to your use of any object code in the Content.  Check the Redistributor's license that was 
+provided with the Content.  If no such license exists, contact the Redistributor.  Unless otherwise
+indicated below, the terms and conditions of the EPL still apply to any source code in the Content
+and such source code may be obtained at <a href="/">http://www.eclipse.org</a>.</p>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/build.properties b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/build.properties
new file mode 100644
index 000000000..e25268790
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/build.properties
@@ -0,0 +1,11 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .,\
+               bundle.properties,\
+               about.html,\
+               plugin.xml
+src.includes = about.html,\
+               META-INF/,\
+               bundle.properties,\
+               src/
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/bundle.properties b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/bundle.properties
new file mode 100644
index 000000000..1c350eebf
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/bundle.properties
@@ -0,0 +1,12 @@
+################################################################################
+# Copyright (c) 2009 Composent, Inc. and others.
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Eclipse Public License v1.0
+# which accompanies this distribution, and is available at
+# http://www.eclipse.org/legal/epl-v10.html
+# 
+# Contributors:
+#     Composent, Inc. - initial API and implementation
+################################################################################
+bundleName=ECF Load Balancing Example Service Host
+bundleProvider=Eclipse.org - ECF
\ No newline at end of file
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/plugin.xml b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/plugin.xml
new file mode 100644
index 000000000..6f45b894a
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/plugin.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?eclipse version="3.4"?>
+<plugin>
+   <extension
+         id="DataProcessorServiceHost"
+         point="org.eclipse.core.runtime.applications">
+      <application
+            cardinality="singleton-global"
+            thread="main"
+            visible="true">
+         <run
+               class="org.eclipse.ecf.internal.examples.loadbalancing.servicehost.DataProcessorServiceHostApplication">
+         </run>
+      </application>
+   </extension>
+
+</plugin>
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/products/Data Processor Service Host (activemq).product b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/products/Data Processor Service Host (activemq).product
new file mode 100644
index 000000000..7eabfdb0a
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/products/Data Processor Service Host (activemq).product
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?pde version="3.5"?>
+
+<product name="ECF Example Load Balancing Service Host" uid="org.eclipse.ecf.examples.loadbalancing.servicehost" application="org.eclipse.ecf.examples.loadbalancing.servicehost.DataProcessorServiceHost" version="1.0.0" useFeatures="false" includeLaunchers="false">
+
+   <configIni use="default">
+   </configIni>
+
+   <launcherArgs>
+      <vmArgsMac>-XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts</vmArgsMac>
+   </launcherArgs>
+
+   <plugins>
+      <plugin id="org.eclipse.core.contenttype"/>
+      <plugin id="org.eclipse.core.jobs"/>
+      <plugin id="org.eclipse.core.runtime"/>
+      <plugin id="org.eclipse.core.runtime.compatibility.registry" fragment="true"/>
+      <plugin id="org.eclipse.ecf"/>
+      <plugin id="org.eclipse.ecf.datashare"/>
+      <plugin id="org.eclipse.ecf.discovery"/>
+      <plugin id="org.eclipse.ecf.examples.loadbalancing"/>
+      <plugin id="org.eclipse.ecf.examples.loadbalancing.servicehost"/>
+      <plugin id="org.eclipse.ecf.identity"/>
+      <plugin id="org.eclipse.ecf.provider"/>
+      <plugin id="org.eclipse.ecf.provider.datashare"/>
+      <plugin id="org.eclipse.ecf.provider.jms"/>
+      <plugin id="org.eclipse.ecf.provider.jms.activemq"/>
+      <plugin id="org.eclipse.ecf.provider.remoteservice"/>
+      <plugin id="org.eclipse.ecf.remoteservice"/>
+      <plugin id="org.eclipse.ecf.sharedobject"/>
+      <plugin id="org.eclipse.ecf.ssl" fragment="true"/>
+      <plugin id="org.eclipse.equinox.app"/>
+      <plugin id="org.eclipse.equinox.common"/>
+      <plugin id="org.eclipse.equinox.concurrent"/>
+      <plugin id="org.eclipse.equinox.preferences"/>
+      <plugin id="org.eclipse.equinox.registry"/>
+      <plugin id="org.eclipse.osgi"/>
+      <plugin id="org.eclipse.osgi.services"/>
+   </plugins>
+
+
+</product>
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/src/org/eclipse/ecf/internal/examples/loadbalancing/servicehost/Activator.java b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/src/org/eclipse/ecf/internal/examples/loadbalancing/servicehost/Activator.java
new file mode 100644
index 000000000..4bf9c4d60
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/src/org/eclipse/ecf/internal/examples/loadbalancing/servicehost/Activator.java
@@ -0,0 +1,34 @@
+package org.eclipse.ecf.internal.examples.loadbalancing.servicehost;
+
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+
+public class Activator implements BundleActivator {
+	private static BundleContext context;
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext
+	 * )
+	 */
+	public void start(BundleContext ctxt) throws Exception {
+		context = ctxt;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
+	 */
+	public void stop(BundleContext context) throws Exception {
+		context = null;
+	}
+
+	public static BundleContext getContext() {
+		return context;
+	}
+
+}
diff --git a/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/src/org/eclipse/ecf/internal/examples/loadbalancing/servicehost/DataProcessorServiceHostApplication.java b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/src/org/eclipse/ecf/internal/examples/loadbalancing/servicehost/DataProcessorServiceHostApplication.java
new file mode 100644
index 000000000..10a037238
--- /dev/null
+++ b/examples/bundles/org.eclipse.ecf.examples.loadbalancing.servicehost/src/org/eclipse/ecf/internal/examples/loadbalancing/servicehost/DataProcessorServiceHostApplication.java
@@ -0,0 +1,157 @@
+/*******************************************************************************
+ * Copyright (c) 2009 EclipseSource and others. All rights reserved. This
+ * program and the accompanying materials are made available under the terms of
+ * the Eclipse Public License v1.0 which accompanies this distribution, and is
+ * available at http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   EclipseSource - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.ecf.internal.examples.loadbalancing.servicehost;
+
+import java.util.Properties;
+
+import org.eclipse.ecf.core.IContainer;
+import org.eclipse.ecf.core.IContainerManager;
+import org.eclipse.ecf.examples.loadbalancing.IDataProcessor;
+import org.eclipse.ecf.remoteservice.IRemoteServiceContainerAdapter;
+import org.eclipse.ecf.remoteservice.IRemoteServiceRegistration;
+import org.eclipse.equinox.app.IApplication;
+import org.eclipse.equinox.app.IApplicationContext;
+import org.osgi.framework.BundleContext;
+import org.osgi.util.tracker.ServiceTracker;
+
+public class DataProcessorServiceHostApplication implements IApplication {
+
+	private static final String LB_SVCHOST_CONTAINER_TYPE = "ecf.jms.activemq.tcp.manager.lb.svchost";
+	public static final String DEFAULT_QUEUE_ID = "tcp://localhost:61616/exampleQueue";
+	private static final String DEFAULT_TOPIC_ID = "tcp://localhost:61616/exampleTopic";
+	private static final String LOAD_BALANCING_SERVICE_PROPERTY = "jms.queue.loadbalance";
+
+	private BundleContext bundleContext;
+	private ServiceTracker containerManagerServiceTracker;
+
+	// JMS Queue URI that we will attach to as queue message producer (to issue
+	// actual remote method/invocation
+	// requests to server consumers). Note that this queueId can be changed by
+	// using the -queueId launch parameter...e.g.:
+	// -queueId tcp://myjmdnsbrokerdnsname:61616/myQueueName
+	private String queueId = DEFAULT_QUEUE_ID;
+	// JMS topic URI that we will register remote service registrations on...
+	// so that service consumers can lookup/get/use remote services. Note that
+	// this
+	// topicId can be changed by using the -topicId launch parameter...e.g.
+	// -topicId tcp://myjmdnsbrokerdnsname:61616/myTopicName
+	private String topicId = DEFAULT_TOPIC_ID;
+
+	// Container instance that connects us with the ActiveMQ queue as a message
+	// producer and publishes the service on the topicId
+	private IContainer container;
+	// The service host remote service registration. This is used simply to
+	// unregister the service when this application is stopped
+	private IRemoteServiceRegistration dataProcessorServiceHostRegistration;
+
+	public Object start(IApplicationContext appContext) throws Exception {
+		bundleContext = Activator.getContext();
+		// Process Arguments...i.e. set queueId and topicId if specified
+		processArgs(appContext);
+
+		// Create container of appropriate type, and with the topicId and
+		// queueId set
+		// upon construction
+		container = getContainerManagerService().getContainerFactory()
+				.createContainer(LB_SVCHOST_CONTAINER_TYPE,
+						new Object[] { topicId, queueId });
+
+		// Get IRemoteServiceContainerAdapter
+		IRemoteServiceContainerAdapter remoteServiceAdapter = (IRemoteServiceContainerAdapter) container
+				.getAdapter(IRemoteServiceContainerAdapter.class);
+
+		Properties properties = new Properties();
+		// This is setting (currently) magical service property that indicates
+		// that
+		// this service registration is a load balancing service host
+		properties.put(LOAD_BALANCING_SERVICE_PROPERTY, "true");
+		// Register the remote service with the IDataProcessor interface as it's
+		// service registration.
+		// Note that the LOAD_BALANCING_SERVICE_PROPERTY allows a new Object to
+		// be specified as the implementation.
+		// This object does not implement the IDataProcessor service interface,
+		// but it is not actually used. Rather,
+		// the LOAD_BALANCING_SERVICE_PROPERTY set to "true" specifies that for
+		// this container the remote service
+		// requests are proxied and forwarded to the JMS queue (where they are
+		// load balanced among the n servers
+		// that are consumers from that queue)
+		dataProcessorServiceHostRegistration = remoteServiceAdapter
+				.registerRemoteService(new String[] { IDataProcessor.class
+						.getName() }, new Object(), properties);
+
+		System.out.println("Registered service host with registration="
+				+ dataProcessorServiceHostRegistration);
+
+		// wait for remote service requests until stopped
+		waitForDone();
+
+		return IApplication.EXIT_OK;
+	}
+
+	public void stop() {
+		if (dataProcessorServiceHostRegistration != null) {
+			dataProcessorServiceHostRegistration.unregister();
+			dataProcessorServiceHostRegistration = null;
+		}
+		if (container != null) {
+			container.dispose();
+			container = null;
+			getContainerManagerService().removeAllContainers();
+		}
+		if (containerManagerServiceTracker != null) {
+			containerManagerServiceTracker.close();
+			containerManagerServiceTracker = null;
+		}
+		bundleContext = null;
+	}
+
+	private void processArgs(IApplicationContext appContext) {
+		String[] originalArgs = (String[]) appContext.getArguments().get(
+				"application.args");
+		if (originalArgs == null)
+			return;
+		for (int i = 0; i < originalArgs.length; i++) {
+			if (originalArgs[i].equals("-queueId")) {
+				queueId = originalArgs[i + 1];
+				i++;
+			} else if (originalArgs[i].equals("-topicId")) {
+				topicId = originalArgs[i + 1];
+				i++;
+			}
+		}
+	}
+
+	private IContainerManager getContainerManagerService() {
+		if (containerManagerServiceTracker == null) {
+			containerManagerServiceTracker = new ServiceTracker(bundleContext,
+					IContainerManager.class.getName(), null);
+			containerManagerServiceTracker.open();
+		}
+		return (IContainerManager) containerManagerServiceTracker.getService();
+	}
+
+	private final Object appLock = new Object();
+	private boolean done = false;
+
+	private void waitForDone() {
+		// then just wait here
+		synchronized (appLock) {
+			while (!done) {
+				try {
+					appLock.wait();
+				} catch (InterruptedException e) {
+					// do nothing
+				}
+			}
+		}
+	}
+
+}