framework/bundles/org.eclipse.ecf/src/org/eclipse/ecf/internal/core/ECFPlugin.java - ecf/org.eclipse.ecf - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004 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
  ******************************************************************************/
 package org.eclipse.ecf.internal.core;

 import java.util.Iterator;
 import java.util.Map;
 import java.util.MissingResourceException;
 import java.util.Properties;
 import java.util.ResourceBundle;
 import java.util.WeakHashMap;

 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IExtension;
 import org.eclipse.core.runtime.IExtensionDelta;
 import org.eclipse.core.runtime.IExtensionPoint;
 import org.eclipse.core.runtime.IExtensionRegistry;
 import org.eclipse.core.runtime.ILog;
 import org.eclipse.core.runtime.IRegistryChangeEvent;
 import org.eclipse.core.runtime.IRegistryChangeListener;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.Plugin;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.ecf.core.ContainerFactory;
 import org.eclipse.ecf.core.ContainerTypeDescription;
 import org.eclipse.ecf.core.IContainerFactory;
 import org.eclipse.ecf.core.provider.IContainerInstantiator;
 import org.eclipse.ecf.core.start.ECFStartJob;
 import org.eclipse.ecf.core.start.IECFStart;
 import org.eclipse.ecf.core.util.Trace;
 import org.osgi.framework.BundleContext;

 public class ECFPlugin extends Plugin {

 	public static final String PLUGIN_ID = "org.eclipse.ecf";

 	private static final String ECFNAMESPACE = PLUGIN_ID;

 	private static final String CONTAINER_FACTORY_NAME = "containerFactory";

 	private static final String CONTAINER_FACTORY_EPOINT = ECFNAMESPACE
 			+ "." + CONTAINER_FACTORY_NAME;

 	private static final String STARTUP_NAME = "startup";

 	public static final String START_EPOINT = ECFNAMESPACE + "." + STARTUP_NAME;

 	public static final String PLUGIN_RESOURCE_BUNDLE = ECFNAMESPACE
 			+ ".ECFPluginResources";

 	public static final String CLASS_ATTRIBUTE = "class";

 	public static final String NAME_ATTRIBUTE = "name";

 	public static final String DESCRIPTION_ATTRIBUTE = "description";

 	public static final String ARG_ELEMENT_NAME = "defaultargument";

 	public static final String VALUE_ATTRIBUTE = "value";

 	public static final String PROPERTY_ELEMENT_NAME = "property";

 	public static final int FACTORY_DOES_NOT_IMPLEMENT_ERRORCODE = 10;

 	public static final int FACTORY_NAME_COLLISION_ERRORCODE = 20;

 	public static final int INSTANTIATOR_DOES_NOT_IMPLEMENT_ERRORCODE = 30;

 	public static final int INSTANTIATOR_NAME_COLLISION_ERRORCODE = 50;

 	public static final int INSTANTIATOR_NAMESPACE_LOAD_ERRORCODE = 60;

 	public static final int START_ERRORCODE = 70;

 	protected static final int REMOVE_NAMESPACE_ERRORCODE = 80;

 	// The shared instance.
 	private static ECFPlugin plugin;

 	// Resource bundle.
 	private ResourceBundle resourceBundle;

 	BundleContext bundlecontext = null;

 	private Map disposables = new WeakHashMap();

 	private IRegistryChangeListener registryManager = null;

 	public ECFPlugin() {
 		super();
 		plugin = this;
 		try {
 			resourceBundle = ResourceBundle.getBundle(PLUGIN_RESOURCE_BUNDLE);
 		} catch (MissingResourceException x) {
 			resourceBundle = null;
 		}
 	}

 	public void addDisposable(IDisposable disposable) {
 		disposables.put(disposable, null);
 	}

 	public void removeDisposable(IDisposable disposable) {
 		disposables.remove(disposable);
 	}

 	protected void fireDisposables() {
 		for (Iterator i = disposables.keySet().iterator(); i.hasNext();) {
 			IDisposable d = (IDisposable) i.next();
 			if (d != null)
 				d.dispose();
 		}
 	}

 	public static void log(IStatus status) {
 		if (status == null)
 			return;
 		ILog log = plugin.getLog();
 		if (log != null)
 			log.log(status);
 		else
 			System.err.println("No log output.  Status Message: "
 					+ status.getMessage());
 	}

 	protected String[] getDefaultArgs(IConfigurationElement[] argElements) {
 		String[] argDefaults = new String[0];
 		if (argElements != null) {
 			if (argElements.length > 0) {
 				argDefaults = new String[argElements.length];
 				for (int i = 0; i < argElements.length; i++)
 					argDefaults[i] = argElements[i]
 							.getAttribute(VALUE_ATTRIBUTE);
 			}
 		}
 		return argDefaults;
 	}

 	protected Map getProperties(IConfigurationElement[] propertyElements) {
 		Properties props = new Properties();
 		if (propertyElements != null) {
 			if (propertyElements.length > 0) {
 				for (int i = 0; i < propertyElements.length; i++) {
 					String name = propertyElements[i]
 							.getAttribute(NAME_ATTRIBUTE);
 					String value = propertyElements[i]
 							.getAttribute(VALUE_ATTRIBUTE);
 					if (name != null && !name.equals("") && value != null
 							&& !value.equals("")) {
 						props.setProperty(name, value);
 					}
 				}
 			}
 		}
 		return props;
 	}

 	protected void logException(IStatus status, String method,
 			Throwable exception) {
 		log(status);
 		Trace.catching(ECFPlugin.getDefault(),
 				ECFDebugOptions.EXCEPTIONS_CATCHING, ECFPlugin.class, method,
 				exception);
 	}

 	/**
 	 * Remove extensions for container factory extension point
 	 *
 	 * @param members
 	 *            the members to remove
 	 */
 	protected void removeContainerFactoryExtensions(
 			IConfigurationElement[] members) {
 		String method = "removeContainerFactoryExtensions";
 		Trace.entering(ECFPlugin.getDefault(),
 				ECFDebugOptions.METHODS_ENTERING, ECFPlugin.class, method,
 				members);
 		// For each configuration element
 		for (int m = 0; m < members.length; m++) {
 			IConfigurationElement member = members[m];
 			// Get the label of the extender plugin and the ID of the extension.
 			IExtension extension = member.getDeclaringExtension();
 			String name = null;
 			try {
 				// Get name and get version, if available
 				name = member.getAttribute(NAME_ATTRIBUTE);
 				if (name == null) {
 					name = member.getAttribute(CLASS_ATTRIBUTE);
 				}
 				IContainerFactory factory = ContainerFactory.getDefault();
 				ContainerTypeDescription cd = factory
 						.getDescriptionByName(name);
 				if (cd == null || !factory.containsDescription(cd)) {
 					continue;
 				}
 				// remove
 				factory.removeDescription(cd);
 				Trace.trace(ECFPlugin.getDefault(), ECFDebugOptions.DEBUG,
 						method + ".removed " + cd + " from factory");
 			} catch (Exception e) {
 				logException(
 						new Status(
 								Status.ERROR,
 								getDefault().getBundle().getSymbolicName(),
 								FACTORY_NAME_COLLISION_ERRORCODE,
 								getResourceString("ExtPointError.ContainerNameCollisionPrefix")
 										+ name
 										+ getResourceString("ExtPointError.ContainerNameCollisionSuffix")
 										+ extension
 												.getExtensionPointUniqueIdentifier(),
 								null), method, e);
 			}
 		}
 	}

 	/**
 	 * Add container factory extension point extensions
 	 *
 	 * @param members
 	 *            to add
 	 */
 	protected void addContainerFactoryExtensions(IConfigurationElement[] members) {
 		String method = "addContainerFactoryExtensions";
 		Trace.entering(ECFPlugin.getDefault(),
 				ECFDebugOptions.METHODS_ENTERING, ECFPlugin.class, method,
 				members);
 		// For each configuration element
 		for (int m = 0; m < members.length; m++) {
 			IConfigurationElement member = members[m];
 			// Get the label of the extender plugin and the ID of the extension.
 			IExtension extension = member.getDeclaringExtension();
 			Object exten = null;
 			String name = null;
 			try {
 				// The only required attribute is "class"
 				exten = member.createExecutableExtension(CLASS_ATTRIBUTE);
 				String clazz = exten.getClass().getName();
 				// Get name and get version, if available
 				name = member.getAttribute(NAME_ATTRIBUTE);
 				if (name == null) {
 					name = clazz;
 				}
 				// Get description, if present
 				String description = member.getAttribute(DESCRIPTION_ATTRIBUTE);
 				if (description == null) {
 					description = "";
 				}
 				// Get any arguments
 				String[] defaults = getDefaultArgs(member
 						.getChildren(ARG_ELEMENT_NAME));
 				// Get any property elements
 				Map properties = getProperties(member
 						.getChildren(PROPERTY_ELEMENT_NAME));
 				// Now make description instance
 				ContainerTypeDescription scd = new ContainerTypeDescription(
 						name, (IContainerInstantiator) exten, description,
 						defaults, properties);
 				IContainerFactory factory = ContainerFactory.getDefault();
 				if (factory.containsDescription(scd)) {
 					throw new CoreException(
 							new Status(
 									Status.ERROR,
 									getDefault().getBundle().getSymbolicName(),
 									FACTORY_NAME_COLLISION_ERRORCODE,
 									getResourceString("ExtPointError.ContainerNameCollisionPrefix")
 											+ name
 											+ getResourceString("ExtPointError.ContainerNameCollisionSuffix")
 											+ extension
 													.getExtensionPointUniqueIdentifier(),
 									null));
 				}
 				// Now add the description and we're ready to go.
 				factory.addDescription(scd);
 				Trace.trace(ECFPlugin.getDefault(), ECFDebugOptions.DEBUG,
 						method + ".added " + scd + " to factory " + factory);
 			} catch (CoreException e) {
 				logException(e.getStatus(), method, e);
 			} catch (Exception e) {
 				logException(
 						new Status(
 								Status.ERROR,
 								getDefault().getBundle().getSymbolicName(),
 								FACTORY_NAME_COLLISION_ERRORCODE,
 								getResourceString("ExtPointError.ContainerNameCollisionPrefix")
 										+ name
 										+ getResourceString("ExtPointError.ContainerNameCollisionSuffix")
 										+ extension
 												.getExtensionPointUniqueIdentifier(),
 								null), method, e);
 			}
 		}
 	}

 	/**
 	 * Setup container factory extension point
 	 *
 	 * @param context
 	 *            the BundleContext for this bundle
 	 */
 	protected void setupContainerFactoryExtensionPoint(BundleContext bc) {
 		IExtensionRegistry reg = Platform.getExtensionRegistry();
 		IExtensionPoint extensionPoint = reg
 				.getExtensionPoint(CONTAINER_FACTORY_EPOINT);
 		if (extensionPoint == null) {
 			return;
 		}
 		addContainerFactoryExtensions(extensionPoint.getConfigurationElements());
 	}

 	/**
 	 * Setup start extension point
 	 *
 	 * @param bc
 	 *            the BundleContext fro this bundle
 	 */
 	protected void setupStartExtensionPoint(BundleContext bc) {
 		IExtensionRegistry reg = Platform.getExtensionRegistry();
 		IExtensionPoint extensionPoint = reg.getExtensionPoint(START_EPOINT);
 		if (extensionPoint == null) {
 			return;
 		}
 		runStartExtensions(extensionPoint.getConfigurationElements());
 	}

 	protected void runStartExtensions(
 			IConfigurationElement[] configurationElements) {
 		String method = "runStartExtensions";
 		// For each configuration element
 		for (int m = 0; m < configurationElements.length; m++) {
 			IConfigurationElement member = configurationElements[m];
 			IECFStart exten = null;
 			String name = null;
 			try {
 				// The only required attribute is "class"
 				exten = (IECFStart) member
 						.createExecutableExtension(CLASS_ATTRIBUTE);
 				// Get name and get version, if available
 				name = member.getAttribute(NAME_ATTRIBUTE);
 				if (name == null)
 					name = exten.getClass().getName();
 				startExtension(name, exten);
 			} catch (CoreException e) {
 				logException(e.getStatus(), method, e);
 			} catch (Exception e) {
 				logException(new Status(Status.ERROR, getDefault().getBundle()
 						.getSymbolicName(), START_ERRORCODE,
 						"Unknown start exception", e), method, e);
 			}
 		}
 	}

 	private void startExtension(String name, IECFStart exten) {
 		// Create job to do start, and schedule
 		ECFStartJob job = new ECFStartJob(name, exten);
 		job.schedule();
 	}

 	/**
 	 * This method is called upon plug-in activation
 	 */
 	public void start(BundleContext context) throws Exception {
 		super.start(context);
 		this.bundlecontext = context;
 		this.registryManager = new ECFRegistryManager();
 		Platform.getExtensionRegistry().addRegistryChangeListener(
 				registryManager);
 		setupContainerFactoryExtensionPoint(context);
 		setupStartExtensionPoint(context);
 	}

 	protected class ECFRegistryManager implements IRegistryChangeListener {
 		public void registryChanged(IRegistryChangeEvent event) {
 			IExtensionDelta delta[] = event.getExtensionDeltas(ECFNAMESPACE,
 					CONTAINER_FACTORY_NAME);
 			for (int i = 0; i < delta.length; i++) {
 				switch (delta[i].getKind()) {
 				case IExtensionDelta.ADDED:
 					addContainerFactoryExtensions(delta[i].getExtension()
 							.getConfigurationElements());
 					break;
 				case IExtensionDelta.REMOVED:
 					removeContainerFactoryExtensions(delta[i].getExtension()
 							.getConfigurationElements());
 					break;
 				}
 			}
 		}
 	}

 	/**
 	 * This method is called when the plug-in is stopped
 	 */
 	public void stop(BundleContext context) throws Exception {
 		super.stop(context);
 		fireDisposables();
 		this.disposables = null;
 		this.bundlecontext = null;
 		Platform.getExtensionRegistry().removeRegistryChangeListener(
 				registryManager);
 		this.registryManager = null;
 	}

 	/**
 	 * Returns the shared instance.
 	 */
 	public static ECFPlugin getDefault() {
 		return plugin;
 	}

 	/**
 	 * Returns the string from the plugin's resource bundle, or 'key' if not
 	 * found.
 	 */
 	public static String getResourceString(String key) {
 		ResourceBundle bundle = ECFPlugin.getDefault().getResourceBundle();
 		try {
 			return (bundle != null) ? bundle.getString(key) : "!" + key + "!";
 		} catch (MissingResourceException e) {
 			return "!" + key + "!";
 		}
 	}

 	/**
 	 * Returns the plugin's resource bundle,
 	 */
 	public ResourceBundle getResourceBundle() {
 		return resourceBundle;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2004 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
	******************************************************************************/
	package org.eclipse.ecf.internal.core;

	import java.util.Iterator;
	import java.util.Map;
	import java.util.MissingResourceException;
	import java.util.Properties;
	import java.util.ResourceBundle;
	import java.util.WeakHashMap;

	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IConfigurationElement;
	import org.eclipse.core.runtime.IExtension;
	import org.eclipse.core.runtime.IExtensionDelta;
	import org.eclipse.core.runtime.IExtensionPoint;
	import org.eclipse.core.runtime.IExtensionRegistry;
	import org.eclipse.core.runtime.ILog;
	import org.eclipse.core.runtime.IRegistryChangeEvent;
	import org.eclipse.core.runtime.IRegistryChangeListener;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.Plugin;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.ecf.core.ContainerFactory;
	import org.eclipse.ecf.core.ContainerTypeDescription;
	import org.eclipse.ecf.core.IContainerFactory;
	import org.eclipse.ecf.core.provider.IContainerInstantiator;
	import org.eclipse.ecf.core.start.ECFStartJob;
	import org.eclipse.ecf.core.start.IECFStart;
	import org.eclipse.ecf.core.util.Trace;
	import org.osgi.framework.BundleContext;

	public class ECFPlugin extends Plugin {

	public static final String PLUGIN_ID = "org.eclipse.ecf";

	private static final String ECFNAMESPACE = PLUGIN_ID;

	private static final String CONTAINER_FACTORY_NAME = "containerFactory";

	private static final String CONTAINER_FACTORY_EPOINT = ECFNAMESPACE
	+ "." + CONTAINER_FACTORY_NAME;

	private static final String STARTUP_NAME = "startup";

	public static final String START_EPOINT = ECFNAMESPACE + "." + STARTUP_NAME;

	public static final String PLUGIN_RESOURCE_BUNDLE = ECFNAMESPACE
	+ ".ECFPluginResources";

	public static final String CLASS_ATTRIBUTE = "class";

	public static final String NAME_ATTRIBUTE = "name";

	public static final String DESCRIPTION_ATTRIBUTE = "description";

	public static final String ARG_ELEMENT_NAME = "defaultargument";

	public static final String VALUE_ATTRIBUTE = "value";

	public static final String PROPERTY_ELEMENT_NAME = "property";

	public static final int FACTORY_DOES_NOT_IMPLEMENT_ERRORCODE = 10;

	public static final int FACTORY_NAME_COLLISION_ERRORCODE = 20;

	public static final int INSTANTIATOR_DOES_NOT_IMPLEMENT_ERRORCODE = 30;

	public static final int INSTANTIATOR_NAME_COLLISION_ERRORCODE = 50;

	public static final int INSTANTIATOR_NAMESPACE_LOAD_ERRORCODE = 60;

	public static final int START_ERRORCODE = 70;

	protected static final int REMOVE_NAMESPACE_ERRORCODE = 80;

	// The shared instance.
	private static ECFPlugin plugin;

	// Resource bundle.
	private ResourceBundle resourceBundle;

	BundleContext bundlecontext = null;

	private Map disposables = new WeakHashMap();

	private IRegistryChangeListener registryManager = null;

	public ECFPlugin() {
	super();
	plugin = this;
	try {
	resourceBundle = ResourceBundle.getBundle(PLUGIN_RESOURCE_BUNDLE);
	} catch (MissingResourceException x) {
	resourceBundle = null;
	}
	}

	public void addDisposable(IDisposable disposable) {
	disposables.put(disposable, null);
	}

	public void removeDisposable(IDisposable disposable) {
	disposables.remove(disposable);
	}

	protected void fireDisposables() {
	for (Iterator i = disposables.keySet().iterator(); i.hasNext();) {
	IDisposable d = (IDisposable) i.next();
	if (d != null)
	d.dispose();
	}
	}

	public static void log(IStatus status) {
	if (status == null)
	return;
	ILog log = plugin.getLog();
	if (log != null)
	log.log(status);
	else
	System.err.println("No log output. Status Message: "
	+ status.getMessage());
	}

	protected String[] getDefaultArgs(IConfigurationElement[] argElements) {
	String[] argDefaults = new String[0];
	if (argElements != null) {
	if (argElements.length > 0) {
	argDefaults = new String[argElements.length];
	for (int i = 0; i < argElements.length; i++)
	argDefaults[i] = argElements[i]
	.getAttribute(VALUE_ATTRIBUTE);
	}
	}
	return argDefaults;
	}

	protected Map getProperties(IConfigurationElement[] propertyElements) {
	Properties props = new Properties();
	if (propertyElements != null) {
	if (propertyElements.length > 0) {
	for (int i = 0; i < propertyElements.length; i++) {
	String name = propertyElements[i]
	.getAttribute(NAME_ATTRIBUTE);
	String value = propertyElements[i]
	.getAttribute(VALUE_ATTRIBUTE);
	if (name != null && !name.equals("") && value != null
	&& !value.equals("")) {
	props.setProperty(name, value);
	}
	}
	}
	}
	return props;
	}

	protected void logException(IStatus status, String method,
	Throwable exception) {
	log(status);
	Trace.catching(ECFPlugin.getDefault(),
	ECFDebugOptions.EXCEPTIONS_CATCHING, ECFPlugin.class, method,
	exception);
	}

	/**
	* Remove extensions for container factory extension point
	*
	* @param members
	* the members to remove
	*/
	protected void removeContainerFactoryExtensions(
	IConfigurationElement[] members) {
	String method = "removeContainerFactoryExtensions";
	Trace.entering(ECFPlugin.getDefault(),
	ECFDebugOptions.METHODS_ENTERING, ECFPlugin.class, method,
	members);
	// For each configuration element
	for (int m = 0; m < members.length; m++) {
	IConfigurationElement member = members[m];
	// Get the label of the extender plugin and the ID of the extension.
	IExtension extension = member.getDeclaringExtension();
	String name = null;
	try {
	// Get name and get version, if available
	name = member.getAttribute(NAME_ATTRIBUTE);
	if (name == null) {
	name = member.getAttribute(CLASS_ATTRIBUTE);
	}
	IContainerFactory factory = ContainerFactory.getDefault();
	ContainerTypeDescription cd = factory
	.getDescriptionByName(name);
	if (cd == null \|\| !factory.containsDescription(cd)) {
	continue;
	}
	// remove
	factory.removeDescription(cd);
	Trace.trace(ECFPlugin.getDefault(), ECFDebugOptions.DEBUG,
	method + ".removed " + cd + " from factory");
	} catch (Exception e) {
	logException(
	new Status(
	Status.ERROR,
	getDefault().getBundle().getSymbolicName(),
	FACTORY_NAME_COLLISION_ERRORCODE,
	getResourceString("ExtPointError.ContainerNameCollisionPrefix")
	+ name
	+ getResourceString("ExtPointError.ContainerNameCollisionSuffix")
	+ extension
	.getExtensionPointUniqueIdentifier(),
	null), method, e);
	}
	}
	}

	/**
	* Add container factory extension point extensions
	*
	* @param members
	* to add
	*/
	protected void addContainerFactoryExtensions(IConfigurationElement[] members) {
	String method = "addContainerFactoryExtensions";
	Trace.entering(ECFPlugin.getDefault(),
	ECFDebugOptions.METHODS_ENTERING, ECFPlugin.class, method,
	members);
	// For each configuration element
	for (int m = 0; m < members.length; m++) {
	IConfigurationElement member = members[m];
	// Get the label of the extender plugin and the ID of the extension.
	IExtension extension = member.getDeclaringExtension();
	Object exten = null;
	String name = null;
	try {
	// The only required attribute is "class"
	exten = member.createExecutableExtension(CLASS_ATTRIBUTE);
	String clazz = exten.getClass().getName();
	// Get name and get version, if available
	name = member.getAttribute(NAME_ATTRIBUTE);
	if (name == null) {
	name = clazz;
	}
	// Get description, if present
	String description = member.getAttribute(DESCRIPTION_ATTRIBUTE);
	if (description == null) {
	description = "";
	}
	// Get any arguments
	String[] defaults = getDefaultArgs(member
	.getChildren(ARG_ELEMENT_NAME));
	// Get any property elements
	Map properties = getProperties(member
	.getChildren(PROPERTY_ELEMENT_NAME));
	// Now make description instance
	ContainerTypeDescription scd = new ContainerTypeDescription(
	name, (IContainerInstantiator) exten, description,
	defaults, properties);
	IContainerFactory factory = ContainerFactory.getDefault();
	if (factory.containsDescription(scd)) {
	throw new CoreException(
	new Status(
	Status.ERROR,
	getDefault().getBundle().getSymbolicName(),
	FACTORY_NAME_COLLISION_ERRORCODE,
	getResourceString("ExtPointError.ContainerNameCollisionPrefix")
	+ name
	+ getResourceString("ExtPointError.ContainerNameCollisionSuffix")
	+ extension
	.getExtensionPointUniqueIdentifier(),
	null));
	}
	// Now add the description and we're ready to go.
	factory.addDescription(scd);
	Trace.trace(ECFPlugin.getDefault(), ECFDebugOptions.DEBUG,
	method + ".added " + scd + " to factory " + factory);
	} catch (CoreException e) {
	logException(e.getStatus(), method, e);
	} catch (Exception e) {
	logException(
	new Status(
	Status.ERROR,
	getDefault().getBundle().getSymbolicName(),
	FACTORY_NAME_COLLISION_ERRORCODE,
	getResourceString("ExtPointError.ContainerNameCollisionPrefix")
	+ name
	+ getResourceString("ExtPointError.ContainerNameCollisionSuffix")
	+ extension
	.getExtensionPointUniqueIdentifier(),
	null), method, e);
	}
	}
	}

	/**
	* Setup container factory extension point
	*
	* @param context
	* the BundleContext for this bundle
	*/
	protected void setupContainerFactoryExtensionPoint(BundleContext bc) {
	IExtensionRegistry reg = Platform.getExtensionRegistry();
	IExtensionPoint extensionPoint = reg
	.getExtensionPoint(CONTAINER_FACTORY_EPOINT);
	if (extensionPoint == null) {
	return;
	}
	addContainerFactoryExtensions(extensionPoint.getConfigurationElements());
	}

	/**
	* Setup start extension point
	*
	* @param bc
	* the BundleContext fro this bundle
	*/
	protected void setupStartExtensionPoint(BundleContext bc) {
	IExtensionRegistry reg = Platform.getExtensionRegistry();
	IExtensionPoint extensionPoint = reg.getExtensionPoint(START_EPOINT);
	if (extensionPoint == null) {
	return;
	}
	runStartExtensions(extensionPoint.getConfigurationElements());
	}

	protected void runStartExtensions(
	IConfigurationElement[] configurationElements) {
	String method = "runStartExtensions";
	// For each configuration element
	for (int m = 0; m < configurationElements.length; m++) {
	IConfigurationElement member = configurationElements[m];
	IECFStart exten = null;
	String name = null;
	try {
	// The only required attribute is "class"
	exten = (IECFStart) member
	.createExecutableExtension(CLASS_ATTRIBUTE);
	// Get name and get version, if available
	name = member.getAttribute(NAME_ATTRIBUTE);
	if (name == null)
	name = exten.getClass().getName();
	startExtension(name, exten);
	} catch (CoreException e) {
	logException(e.getStatus(), method, e);
	} catch (Exception e) {
	logException(new Status(Status.ERROR, getDefault().getBundle()
	.getSymbolicName(), START_ERRORCODE,
	"Unknown start exception", e), method, e);
	}
	}
	}

	private void startExtension(String name, IECFStart exten) {
	// Create job to do start, and schedule
	ECFStartJob job = new ECFStartJob(name, exten);
	job.schedule();
	}

	/**
	* This method is called upon plug-in activation
	*/
	public void start(BundleContext context) throws Exception {
	super.start(context);
	this.bundlecontext = context;
	this.registryManager = new ECFRegistryManager();
	Platform.getExtensionRegistry().addRegistryChangeListener(
	registryManager);
	setupContainerFactoryExtensionPoint(context);
	setupStartExtensionPoint(context);
	}

	protected class ECFRegistryManager implements IRegistryChangeListener {
	public void registryChanged(IRegistryChangeEvent event) {
	IExtensionDelta delta[] = event.getExtensionDeltas(ECFNAMESPACE,
	CONTAINER_FACTORY_NAME);
	for (int i = 0; i < delta.length; i++) {
	switch (delta[i].getKind()) {
	case IExtensionDelta.ADDED:
	addContainerFactoryExtensions(delta[i].getExtension()
	.getConfigurationElements());
	break;
	case IExtensionDelta.REMOVED:
	removeContainerFactoryExtensions(delta[i].getExtension()
	.getConfigurationElements());
	break;
	}
	}
	}
	}

	/**
	* This method is called when the plug-in is stopped
	*/
	public void stop(BundleContext context) throws Exception {
	super.stop(context);
	fireDisposables();
	this.disposables = null;
	this.bundlecontext = null;
	Platform.getExtensionRegistry().removeRegistryChangeListener(
	registryManager);
	this.registryManager = null;
	}

	/**
	* Returns the shared instance.
	*/
	public static ECFPlugin getDefault() {
	return plugin;
	}

	/**
	* Returns the string from the plugin's resource bundle, or 'key' if not
	* found.
	*/
	public static String getResourceString(String key) {
	ResourceBundle bundle = ECFPlugin.getDefault().getResourceBundle();
	try {
	return (bundle != null) ? bundle.getString(key) : "!" + key + "!";
	} catch (MissingResourceException e) {
	return "!" + key + "!";
	}
	}

	/**
	* Returns the plugin's resource bundle,
	*/
	public ResourceBundle getResourceBundle() {
	return resourceBundle;
	}
	}