| /******************************************************************************* |
| * Copyright (c) 2003, 2009 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.osgi.framework.internal.core; |
| |
| import java.io.File; |
| import java.io.InputStream; |
| import java.security.*; |
| import java.util.*; |
| import org.eclipse.osgi.event.BatchBundleListener; |
| import org.eclipse.osgi.framework.debug.Debug; |
| import org.eclipse.osgi.framework.eventmgr.CopyOnWriteIdentityMap; |
| import org.eclipse.osgi.framework.eventmgr.EventDispatcher; |
| import org.eclipse.osgi.internal.profile.Profile; |
| import org.eclipse.osgi.internal.serviceregistry.ServiceReferenceImpl; |
| import org.eclipse.osgi.internal.serviceregistry.ServiceRegistry; |
| import org.eclipse.osgi.util.NLS; |
| import org.osgi.framework.*; |
| |
| /** |
| * Bundle's execution context. |
| * |
| * This object is given out to bundles and wraps the internal |
| * BundleContext object. It is destroyed when a bundle is stopped. |
| */ |
| |
| public class BundleContextImpl implements BundleContext, EventDispatcher { |
| private static boolean SET_TCCL = "true".equals(FrameworkProperties.getProperty("eclipse.bundle.setTCCL", "true")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| /** true if the bundle context is still valid */ |
| private volatile boolean valid; |
| |
| /** Bundle object this context is associated with. */ |
| // This slot is accessed directly by the Framework instead of using |
| // the getBundle() method because the Framework needs access to the bundle |
| // even when the context is invalid while the close method is being called. |
| final BundleHost bundle; |
| |
| /** Internal framework object. */ |
| final Framework framework; |
| |
| /** Services that bundle is using. Key is ServiceRegistrationImpl, |
| Value is ServiceUse */ |
| /* @GuardedBy("contextLock") */ |
| private HashMap/*<ServiceRegistrationImpl, ServiceUse>*/servicesInUse; |
| |
| /** Listener list for bundle's BundleListeners */ |
| protected Map bundleEvent; |
| |
| /** Listener list for bundle's SynchronousBundleListeners */ |
| protected Map bundleEventSync; |
| |
| /** Listener list for bundle's FrameworkListeners */ |
| protected Map frameworkEvent; |
| |
| /** The current instantiation of the activator. */ |
| protected BundleActivator activator; |
| |
| /** private object for locking */ |
| private final Object contextLock = new Object(); |
| |
| /** |
| * Construct a BundleContext which wrappers the framework for a |
| * bundle |
| * |
| * @param bundle The bundle we are wrapping. |
| */ |
| protected BundleContextImpl(BundleHost bundle) { |
| this.bundle = bundle; |
| valid = true; |
| framework = bundle.framework; |
| bundleEvent = null; |
| bundleEventSync = null; |
| frameworkEvent = null; |
| synchronized (contextLock) { |
| servicesInUse = null; |
| } |
| activator = null; |
| } |
| |
| /** |
| * Destroy the wrapper. This is called when the bundle is stopped. |
| * |
| */ |
| protected void close() { |
| valid = false; /* invalidate context */ |
| |
| final ServiceRegistry registry = framework.getServiceRegistry(); |
| |
| registry.removeAllServiceListeners(this); |
| synchronized (framework.frameworkEvent) { |
| if (frameworkEvent != null) { |
| framework.frameworkEvent.remove(this); |
| frameworkEvent = null; |
| } |
| } |
| synchronized (framework.bundleEvent) { |
| if (bundleEvent != null) { |
| framework.bundleEvent.remove(this); |
| bundleEvent = null; |
| } |
| } |
| synchronized (framework.bundleEventSync) { |
| if (bundleEventSync != null) { |
| framework.bundleEventSync.remove(this); |
| bundleEventSync = null; |
| } |
| } |
| |
| /* service's registered by the bundle, if any, are unregistered. */ |
| registry.unregisterServices(this); |
| |
| /* service's used by the bundle, if any, are released. */ |
| registry.releaseServicesInUse(this); |
| |
| synchronized (contextLock) { |
| servicesInUse = null; |
| } |
| } |
| |
| /** |
| * Retrieve the value of the named environment property. |
| * |
| * @param key The name of the requested property. |
| * @return The value of the requested property, or <code>null</code> if |
| * the property is undefined. |
| */ |
| public String getProperty(String key) { |
| SecurityManager sm = System.getSecurityManager(); |
| |
| if (sm != null) { |
| sm.checkPropertyAccess(key); |
| } |
| |
| return (framework.getProperty(key)); |
| } |
| |
| /** |
| * Retrieve the Bundle object for the context bundle. |
| * |
| * @return The context bundle's Bundle object. |
| */ |
| public Bundle getBundle() { |
| checkValid(); |
| |
| return getBundleImpl(); |
| } |
| |
| public AbstractBundle getBundleImpl() { |
| return bundle; |
| } |
| |
| public Bundle installBundle(String location) throws BundleException { |
| return installBundle(location, null); |
| } |
| |
| public Bundle installBundle(String location, InputStream in) throws BundleException { |
| checkValid(); |
| //note AdminPermission is checked after bundle is loaded |
| return framework.installBundle(location, in); |
| } |
| |
| /** |
| * Retrieve the bundle that has the given unique identifier. |
| * |
| * @param id The identifier of the bundle to retrieve. |
| * @return A Bundle object, or <code>null</code> |
| * if the identifier doesn't match any installed bundle. |
| */ |
| public Bundle getBundle(long id) { |
| return (framework.getBundle(id)); |
| } |
| |
| /** |
| * Retrieve the bundle that has the given location. |
| * |
| * @param location The location string of the bundle to retrieve. |
| * @return A Bundle object, or <code>null</code> |
| * if the location doesn't match any installed bundle. |
| */ |
| public AbstractBundle getBundleByLocation(String location) { |
| return (framework.getBundleByLocation(location)); |
| } |
| |
| /** |
| * Retrieve a list of all installed bundles. |
| * The list is valid at the time |
| * of the call to getBundles, but the framework is a very dynamic |
| * environment and bundles can be installed or uninstalled at anytime. |
| * |
| * @return An array of {@link AbstractBundle} objects, one |
| * object per installed bundle. |
| */ |
| public Bundle[] getBundles() { |
| return framework.getAllBundles(); |
| } |
| |
| /** |
| * Add a service listener with a filter. |
| * {@link ServiceListener}s are notified when a service has a lifecycle |
| * state change. |
| * See {@link #getServiceReferences(String, String) getServiceReferences} |
| * for a description of the filter syntax. |
| * The listener is added to the context bundle's list of listeners. |
| * See {@link #getBundle() getBundle()} |
| * for a definition of context bundle. |
| * |
| * <p>The listener is called if the filter criteria is met. |
| * To filter based upon the class of the service, the filter |
| * should reference the "objectClass" property. |
| * If the filter paramater is <code>null</code>, all services |
| * are considered to match the filter. |
| * <p>If the Java runtime environment supports permissions, then additional |
| * filtering is done. |
| * {@link AbstractBundle#hasPermission(Object) Bundle.hasPermission} is called for the |
| * bundle which defines the listener to validate that the listener has the |
| * {@link ServicePermission} permission to <code>"get"</code> the service |
| * using at least one of the named classes the service was registered under. |
| * |
| * @param listener The service listener to add. |
| * @param filter The filter criteria. |
| * @exception InvalidSyntaxException If the filter parameter contains |
| * an invalid filter string which cannot be parsed. |
| * @see ServiceEvent |
| * @see ServiceListener |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| */ |
| public void addServiceListener(ServiceListener listener, String filter) throws InvalidSyntaxException { |
| checkValid(); |
| |
| if (listener == null) { |
| throw new IllegalArgumentException(); |
| } |
| framework.getServiceRegistry().addServiceListener(this, listener, filter); |
| } |
| |
| /** |
| * Add a service listener. |
| * |
| * <p>This method is the same as calling |
| * {@link #addServiceListener(ServiceListener, String)} |
| * with filter set to <code>null</code>. |
| * |
| * @see #addServiceListener(ServiceListener, String) |
| */ |
| public void addServiceListener(ServiceListener listener) { |
| try { |
| addServiceListener(listener, null); |
| } catch (InvalidSyntaxException e) { |
| if (Debug.DEBUG && Debug.DEBUG_GENERAL) { |
| Debug.println("InvalidSyntaxException w/ null filter" + e.getMessage()); //$NON-NLS-1$ |
| Debug.printStackTrace(e); |
| } |
| } |
| } |
| |
| /** |
| * Remove a service listener. |
| * The listener is removed from the context bundle's list of listeners. |
| * See {@link #getBundle() getBundle()} |
| * for a definition of context bundle. |
| * |
| * <p>If this method is called with a listener which is not registered, |
| * then this method does nothing. |
| * |
| * @param listener The service listener to remove. |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| */ |
| public void removeServiceListener(ServiceListener listener) { |
| checkValid(); |
| |
| if (listener == null) { |
| throw new IllegalArgumentException(); |
| } |
| framework.getServiceRegistry().removeServiceListener(this, listener); |
| } |
| |
| /** |
| * Add a bundle listener. |
| * {@link BundleListener}s are notified when a bundle has a lifecycle |
| * state change. |
| * The listener is added to the context bundle's list of listeners. |
| * See {@link #getBundle() getBundle()} |
| * for a definition of context bundle. |
| * |
| * @param listener The bundle listener to add. |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| * @see BundleEvent |
| * @see BundleListener |
| */ |
| public void addBundleListener(BundleListener listener) { |
| checkValid(); |
| if (listener == null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| if (Debug.DEBUG && Debug.DEBUG_EVENTS) { |
| String listenerName = listener.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(listener)); //$NON-NLS-1$ |
| Debug.println("addBundleListener[" + bundle + "](" + listenerName + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| |
| if (listener instanceof SynchronousBundleListener) { |
| framework.checkAdminPermission(getBundle(), AdminPermission.LISTENER); |
| synchronized (framework.bundleEventSync) { |
| checkValid(); |
| if (bundleEventSync == null) { |
| bundleEventSync = new CopyOnWriteIdentityMap(); |
| framework.bundleEventSync.put(this, this); |
| } |
| |
| bundleEventSync.put(listener, listener); |
| } |
| } else { |
| synchronized (framework.bundleEvent) { |
| checkValid(); |
| if (bundleEvent == null) { |
| bundleEvent = new CopyOnWriteIdentityMap(); |
| framework.bundleEvent.put(this, this); |
| } |
| |
| bundleEvent.put(listener, listener); |
| } |
| } |
| } |
| |
| /** |
| * Remove a bundle listener. |
| * The listener is removed from the context bundle's list of listeners. |
| * See {@link #getBundle() getBundle()} |
| * for a definition of context bundle. |
| * |
| * <p>If this method is called with a listener which is not registered, |
| * then this method does nothing. |
| * |
| * @param listener The bundle listener to remove. |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| */ |
| public void removeBundleListener(BundleListener listener) { |
| checkValid(); |
| if (listener == null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| if (Debug.DEBUG && Debug.DEBUG_EVENTS) { |
| String listenerName = listener.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(listener)); //$NON-NLS-1$ |
| Debug.println("removeBundleListener[" + bundle + "](" + listenerName + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| |
| if (listener instanceof SynchronousBundleListener) { |
| framework.checkAdminPermission(getBundle(), AdminPermission.LISTENER); |
| |
| synchronized (framework.bundleEventSync) { |
| if (bundleEventSync != null) { |
| bundleEventSync.remove(listener); |
| } |
| } |
| } else { |
| synchronized (framework.bundleEvent) { |
| if (bundleEvent != null) { |
| bundleEvent.remove(listener); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Add a general framework listener. |
| * {@link FrameworkListener}s are notified of general framework events. |
| * The listener is added to the context bundle's list of listeners. |
| * See {@link #getBundle() getBundle()} |
| * for a definition of context bundle. |
| * |
| * @param listener The framework listener to add. |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| * @see FrameworkEvent |
| * @see FrameworkListener |
| */ |
| public void addFrameworkListener(FrameworkListener listener) { |
| checkValid(); |
| if (listener == null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| if (Debug.DEBUG && Debug.DEBUG_EVENTS) { |
| String listenerName = listener.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(listener)); //$NON-NLS-1$ |
| Debug.println("addFrameworkListener[" + bundle + "](" + listenerName + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| |
| synchronized (framework.frameworkEvent) { |
| checkValid(); |
| if (frameworkEvent == null) { |
| frameworkEvent = new CopyOnWriteIdentityMap(); |
| framework.frameworkEvent.put(this, this); |
| } |
| |
| frameworkEvent.put(listener, listener); |
| } |
| } |
| |
| /** |
| * Remove a framework listener. |
| * The listener is removed from the context bundle's list of listeners. |
| * See {@link #getBundle() getBundle()} |
| * for a definition of context bundle. |
| * |
| * <p>If this method is called with a listener which is not registered, |
| * then this method does nothing. |
| * |
| * @param listener The framework listener to remove. |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| */ |
| public void removeFrameworkListener(FrameworkListener listener) { |
| checkValid(); |
| if (listener == null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| if (Debug.DEBUG && Debug.DEBUG_EVENTS) { |
| String listenerName = listener.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(listener)); //$NON-NLS-1$ |
| Debug.println("removeFrameworkListener[" + bundle + "](" + listenerName + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| |
| synchronized (framework.frameworkEvent) { |
| if (frameworkEvent != null) { |
| frameworkEvent.remove(listener); |
| } |
| } |
| } |
| |
| /** |
| * Register a service with multiple names. |
| * This method registers the given service object with the given properties |
| * under the given class names. |
| * A {@link ServiceRegistration} object is returned. |
| * The {@link ServiceRegistration} object is for the private use of the bundle |
| * registering the service and should not be shared with other bundles. |
| * The registering bundle is defined to be the context bundle. |
| * See {@link #getBundle()} for a definition of context bundle. |
| * Other bundles can locate the service by using either the |
| * {@link #getServiceReferences getServiceReferences} or |
| * {@link #getServiceReference getServiceReference} method. |
| * |
| * <p>A bundle can register a service object that implements the |
| * {@link ServiceFactory} interface to |
| * have more flexiblity in providing service objects to different |
| * bundles. |
| * |
| * <p>The following steps are followed to register a service: |
| * <ol> |
| * <li>If the service parameter is not a {@link ServiceFactory}, |
| * an <code>IllegalArgumentException</code> is thrown if the |
| * service parameter is not an <code>instanceof</code> |
| * all the classes named. |
| * <li>The service is added to the framework's service registry |
| * and may now be used by other bundles. |
| * <li>A {@link ServiceEvent} of type {@link ServiceEvent#REGISTERED} |
| * is synchronously sent. |
| * <li>A {@link ServiceRegistration} object for this registration |
| * is returned. |
| * </ol> |
| * |
| * @param clazzes The class names under which the service can be located. |
| * The class names in this array will be stored in the service's |
| * properties under the key "objectClass". |
| * @param service The service object or a {@link ServiceFactory} object. |
| * @param properties The properties for this service. |
| * The keys in the properties object must all be Strings. |
| * Changes should not be made to this object after calling this method. |
| * To update the service's properties call the |
| * {@link ServiceRegistration#setProperties ServiceRegistration.setProperties} |
| * method. |
| * This parameter may be <code>null</code> if the service has no properties. |
| * @return A {@link ServiceRegistration} object for use by the bundle |
| * registering the service to update the |
| * service's properties or to unregister the service. |
| * @exception java.lang.IllegalArgumentException If one of the following is true: |
| * <ul> |
| * <li>The service parameter is null. |
| * <li>The service parameter is not a {@link ServiceFactory} and is not an |
| * <code>instanceof</code> all the named classes in the clazzes parameter. |
| * </ul> |
| * @exception java.lang.SecurityException If the caller does not have |
| * {@link ServicePermission} permission to "register" the service for |
| * all the named classes |
| * and the Java runtime environment supports permissions. |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| * @see ServiceRegistration |
| * @see ServiceFactory |
| */ |
| public ServiceRegistration registerService(String[] clazzes, Object service, Dictionary properties) { |
| checkValid(); |
| |
| return framework.getServiceRegistry().registerService(this, clazzes, service, properties); |
| } |
| |
| /** |
| * Register a service with a single name. |
| * This method registers the given service object with the given properties |
| * under the given class name. |
| * |
| * <p>This method is otherwise identical to |
| * {@link #registerService(java.lang.String[], java.lang.Object, java.util.Dictionary)} |
| * and is provided as a convenience when the service parameter will only be registered |
| * under a single class name. |
| * |
| * @see #registerService(java.lang.String[], java.lang.Object, java.util.Dictionary) |
| */ |
| public ServiceRegistration registerService(String clazz, Object service, Dictionary properties) { |
| String[] clazzes = new String[] {clazz}; |
| |
| return registerService(clazzes, service, properties); |
| } |
| |
| /** |
| * Returns a list of <tt>ServiceReference</tt> objects. This method returns a list of |
| * <tt>ServiceReference</tt> objects for services which implement and were registered under |
| * the specified class and match the specified filter criteria. |
| * |
| * <p>The list is valid at the time of the call to this method, however as the Framework is |
| * a very dynamic environment, services can be modified or unregistered at anytime. |
| * |
| * <p><tt>filter</tt> is used to select the registered service whose |
| * properties objects contain keys and values which satisfy the filter. |
| * See {@link Filter}for a description of the filter string syntax. |
| * |
| * <p>If <tt>filter</tt> is <tt>null</tt>, all registered services |
| * are considered to match the filter. |
| * <p>If <tt>filter</tt> cannot be parsed, an {@link InvalidSyntaxException} will |
| * be thrown with a human readable message where the filter became unparsable. |
| * |
| * <p>The following steps are required to select a service: |
| * <ol> |
| * <li>If the Java Runtime Environment supports permissions, the caller is checked for the |
| * <tt>ServicePermission</tt> to get the service with the specified class. |
| * If the caller does not have the correct permission, <tt>null</tt> is returned. |
| * <li>If the filter string is not <tt>null</tt>, the filter string is |
| * parsed and the set of registered services which satisfy the filter is |
| * produced. |
| * If the filter string is <tt>null</tt>, then all registered services |
| * are considered to satisfy the filter. |
| * <li>If <code>clazz</code> is not <tt>null</tt>, the set is further reduced to |
| * those services which are an <tt>instanceof</tt> and were registered under the specified class. |
| * The complete list of classes of which a service is an instance and which |
| * were specified when the service was registered is available from the |
| * service's {@link Constants#OBJECTCLASS}property. |
| * <li>An array of <tt>ServiceReference</tt> to the selected services is returned. |
| * </ol> |
| * |
| * @param clazz The class name with which the service was registered, or |
| * <tt>null</tt> for all services. |
| * @param filter The filter criteria. |
| * @return An array of <tt>ServiceReference</tt> objects, or |
| * <tt>null</tt> if no services are registered which satisfy the search. |
| * @exception InvalidSyntaxException If <tt>filter</tt> contains |
| * an invalid filter string which cannot be parsed. |
| */ |
| public ServiceReference[] getServiceReferences(String clazz, String filter) throws InvalidSyntaxException { |
| checkValid(); |
| return framework.getServiceRegistry().getServiceReferences(this, clazz, filter, false); |
| } |
| |
| public ServiceReference[] getAllServiceReferences(String clazz, String filter) throws InvalidSyntaxException { |
| checkValid(); |
| return framework.getServiceRegistry().getServiceReferences(this, clazz, filter, true); |
| } |
| |
| /** |
| * Get a service reference. |
| * Retrieves a {@link ServiceReference} for a service |
| * which implements the named class. |
| * |
| * <p>This reference is valid at the time |
| * of the call to this method, but since the framework is a very dynamic |
| * environment, services can be modified or unregistered at anytime. |
| * |
| * <p>This method is provided as a convenience for when the caller is |
| * interested in any service which implements a named class. This method is |
| * the same as calling {@link #getServiceReferences getServiceReferences} |
| * with a <code>null</code> filter string but only a single {@link ServiceReference} |
| * is returned. |
| * |
| * @param clazz The class name which the service must implement. |
| * @return A {@link ServiceReference} object, or <code>null</code> |
| * if no services are registered which implement the named class. |
| * @see #getServiceReferences |
| */ |
| public ServiceReference getServiceReference(String clazz) { |
| checkValid(); |
| |
| return framework.getServiceRegistry().getServiceReference(this, clazz); |
| } |
| |
| /** |
| * Get a service's service object. |
| * Retrieves the service object for a service. |
| * A bundle's use of a service is tracked by a |
| * use count. Each time a service's service object is returned by |
| * {@link #getService}, the context bundle's use count for the service |
| * is incremented by one. Each time the service is release by |
| * {@link #ungetService}, the context bundle's use count |
| * for the service is decremented by one. |
| * When a bundle's use count for a service |
| * drops to zero, the bundle should no longer use the service. |
| * See {@link #getBundle()} for a definition of context bundle. |
| * |
| * <p>This method will always return <code>null</code> when the |
| * service associated with this reference has been unregistered. |
| * |
| * <p>The following steps are followed to get the service object: |
| * <ol> |
| * <li>If the service has been unregistered, |
| * <code>null</code> is returned. |
| * <li>The context bundle's use count for this service is incremented by one. |
| * <li>If the context bundle's use count for the service is now one and |
| * the service was registered with a {@link ServiceFactory}, |
| * the {@link ServiceFactory#getService ServiceFactory.getService} method |
| * is called to create a service object for the context bundle. |
| * This service object is cached by the framework. |
| * While the context bundle's use count for the service is greater than zero, |
| * subsequent calls to get the services's service object for the context bundle |
| * will return the cached service object. |
| * <br>If the service object returned by the {@link ServiceFactory} |
| * is not an <code>instanceof</code> |
| * all the classes named when the service was registered or |
| * the {@link ServiceFactory} throws an exception, |
| * <code>null</code> is returned and a |
| * {@link FrameworkEvent} of type {@link FrameworkEvent#ERROR} is broadcast. |
| * <li>The service object for the service is returned. |
| * </ol> |
| * |
| * @param reference A reference to the service whose service object is desired. |
| * @return A service object for the service associated with this |
| * reference, or <code>null</code> if the service is not registered. |
| * @exception java.lang.SecurityException If the caller does not have |
| * {@link ServicePermission} permission to "get" the service |
| * using at least one of the named classes the service was registered under |
| * and the Java runtime environment supports permissions. |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| * @see #ungetService |
| * @see ServiceFactory |
| */ |
| public Object getService(ServiceReference reference) { |
| checkValid(); |
| if (reference == null) |
| throw new NullPointerException("A null service reference is not allowed."); //$NON-NLS-1$ |
| synchronized (contextLock) { |
| if (servicesInUse == null) |
| // Cannot predict how many services a bundle will use, start with a small table. |
| servicesInUse = new HashMap(10); |
| } |
| |
| return framework.getServiceRegistry().getService(this, (ServiceReferenceImpl) reference); |
| } |
| |
| /** |
| * Unget a service's service object. |
| * Releases the service object for a service. |
| * If the context bundle's use count for the service is zero, this method |
| * returns <code>false</code>. Otherwise, the context bundle's use count for the |
| * service is decremented by one. |
| * See {@link #getBundle()} for a definition of context bundle. |
| * |
| * <p>The service's service object |
| * should no longer be used and all references to it should be destroyed |
| * when a bundle's use count for the service |
| * drops to zero. |
| * |
| * <p>The following steps are followed to unget the service object: |
| * <ol> |
| * <li>If the context bundle's use count for the service is zero or |
| * the service has been unregistered, |
| * <code>false</code> is returned. |
| * <li>The context bundle's use count for this service is decremented by one. |
| * <li>If the context bundle's use count for the service is now zero and |
| * the service was registered with a {@link ServiceFactory}, |
| * the {@link ServiceFactory#ungetService ServiceFactory.ungetService} method |
| * is called to release the service object for the context bundle. |
| * <li><code>true</code> is returned. |
| * </ol> |
| * |
| * @param reference A reference to the service to be released. |
| * @return <code>false</code> if the context bundle's use count for the service |
| * is zero or if the service has been unregistered, |
| * otherwise <code>true</code>. |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| * @see #getService |
| * @see ServiceFactory |
| */ |
| public boolean ungetService(ServiceReference reference) { |
| checkValid(); |
| |
| return framework.getServiceRegistry().ungetService(this, (ServiceReferenceImpl) reference); |
| } |
| |
| /** |
| * Creates a <code>File</code> object for a file in the |
| * persistent storage area provided for the bundle by the framework. |
| * If the adaptor does not have file system support, this method will |
| * return <code>null</code>. |
| * |
| * <p>A <code>File</code> object for the base directory of the |
| * persistent storage area provided for the context bundle by the framework |
| * can be obtained by calling this method with the empty string ("") |
| * as the parameter. |
| * See {@link #getBundle()} for a definition of context bundle. |
| * |
| * <p>If the Java runtime environment supports permissions, |
| * the framework the will ensure that the bundle has |
| * <code>java.io.FilePermission</code> with actions |
| * "read","write","execute","delete" for all files (recursively) in the |
| * persistent storage area provided for the context bundle by the framework. |
| * |
| * @param filename A relative name to the file to be accessed. |
| * @return A <code>File</code> object that represents the requested file or |
| * <code>null</code> if the adaptor does not have file system support. |
| * @exception java.lang.IllegalStateException |
| * If the bundle context has stopped. |
| */ |
| public File getDataFile(String filename) { |
| checkValid(); |
| |
| return (framework.getDataFile(bundle, filename)); |
| } |
| |
| /** |
| * Call bundle's BundleActivator.start() |
| * This method is called by Bundle.startWorker to start the bundle. |
| * |
| * @exception BundleException if |
| * the bundle has a class that implements the BundleActivator interface, |
| * but Framework couldn't instantiate it, or the BundleActivator.start() |
| * method failed |
| */ |
| protected void start() throws BundleException { |
| activator = bundle.loadBundleActivator(); |
| |
| if (activator != null) { |
| try { |
| startActivator(activator); |
| } catch (BundleException be) { |
| activator = null; |
| throw be; |
| } |
| } |
| |
| /* activator completed successfully. We must use this |
| same activator object when we stop this bundle. */ |
| } |
| |
| /** |
| * Calls the start method of a BundleActivator. |
| * @param bundleActivator that activator to start |
| */ |
| protected void startActivator(final BundleActivator bundleActivator) throws BundleException { |
| if (Profile.PROFILE && Profile.STARTUP) |
| Profile.logEnter("BundleContextImpl.startActivator()", null); //$NON-NLS-1$ |
| try { |
| AccessController.doPrivileged(new PrivilegedExceptionAction() { |
| public Object run() throws Exception { |
| if (bundleActivator != null) { |
| if (Profile.PROFILE && Profile.STARTUP) |
| Profile.logTime("BundleContextImpl.startActivator()", "calling " + bundle.getLocation() + " bundle activator"); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$ |
| // make sure the context class loader is set correctly |
| Object previousTCCL = setContextFinder(); |
| /* Start the bundle synchronously */ |
| try { |
| bundleActivator.start(BundleContextImpl.this); |
| } finally { |
| if (previousTCCL != Boolean.FALSE) |
| Thread.currentThread().setContextClassLoader((ClassLoader) previousTCCL); |
| } |
| if (Profile.PROFILE && Profile.STARTUP) |
| Profile.logTime("BundleContextImpl.startActivator()", "returned from " + bundle.getLocation() + " bundle activator"); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$ |
| } |
| return null; |
| } |
| }); |
| } catch (Throwable t) { |
| if (t instanceof PrivilegedActionException) { |
| t = ((PrivilegedActionException) t).getException(); |
| } |
| |
| if (Debug.DEBUG && Debug.DEBUG_GENERAL) { |
| Debug.printStackTrace(t); |
| } |
| |
| String clazz = null; |
| clazz = bundleActivator.getClass().getName(); |
| |
| throw new BundleException(NLS.bind(Msg.BUNDLE_ACTIVATOR_EXCEPTION, new Object[] {clazz, "start", bundle.getSymbolicName() == null ? "" + bundle.getBundleId() : bundle.getSymbolicName()}), BundleException.ACTIVATOR_ERROR, t); //$NON-NLS-1$ //$NON-NLS-2$ |
| } finally { |
| if (Profile.PROFILE && Profile.STARTUP) |
| Profile.logExit("BundleContextImpl.startActivator()"); //$NON-NLS-1$ |
| } |
| } |
| |
| Object setContextFinder() { |
| if (!SET_TCCL) |
| return Boolean.FALSE; |
| Thread currentThread = Thread.currentThread(); |
| ClassLoader previousTCCL = currentThread.getContextClassLoader(); |
| ClassLoader contextFinder = framework.getContextFinder(); |
| if (previousTCCL != contextFinder) { |
| currentThread.setContextClassLoader(framework.getContextFinder()); |
| return previousTCCL; |
| } |
| return Boolean.FALSE; |
| } |
| |
| /** |
| * Call bundle's BundleActivator.stop() |
| * This method is called by Bundle.stopWorker to stop the bundle. |
| * |
| * @exception BundleException if |
| * the bundle has a class that implements the BundleActivator interface, |
| * and the BundleActivator.stop() method failed |
| */ |
| protected void stop() throws BundleException { |
| try { |
| AccessController.doPrivileged(new PrivilegedExceptionAction() { |
| public Object run() throws Exception { |
| if (activator != null) { |
| // make sure the context class loader is set correctly |
| Object previousTCCL = setContextFinder(); |
| try { |
| /* Stop the bundle synchronously */ |
| activator.stop(BundleContextImpl.this); |
| } finally { |
| if (previousTCCL != Boolean.FALSE) |
| Thread.currentThread().setContextClassLoader((ClassLoader) previousTCCL); |
| } |
| } |
| return null; |
| } |
| }); |
| } catch (Throwable t) { |
| if (t instanceof PrivilegedActionException) { |
| t = ((PrivilegedActionException) t).getException(); |
| } |
| |
| if (Debug.DEBUG && Debug.DEBUG_GENERAL) { |
| Debug.printStackTrace(t); |
| } |
| |
| String clazz = (activator == null) ? "" : activator.getClass().getName(); //$NON-NLS-1$ |
| |
| throw new BundleException(NLS.bind(Msg.BUNDLE_ACTIVATOR_EXCEPTION, new Object[] {clazz, "stop", bundle.getSymbolicName() == null ? "" + bundle.getBundleId() : bundle.getSymbolicName()}), BundleException.ACTIVATOR_ERROR, t); //$NON-NLS-1$ //$NON-NLS-2$ |
| } finally { |
| activator = null; |
| } |
| } |
| |
| /** |
| * Return the map of ServiceRegistrationImpl to ServiceUse for services being |
| * used by this context. |
| * @return A map of ServiceRegistrationImpl to ServiceUse for services in use by |
| * this context. |
| */ |
| public Map getServicesInUseMap() { |
| synchronized (contextLock) { |
| return servicesInUse; |
| } |
| } |
| |
| /** |
| * Bottom level event dispatcher for the BundleContext. |
| * |
| * @param originalListener listener object registered under. |
| * @param l listener to call (may be filtered). |
| * @param action Event class type |
| * @param object Event object |
| */ |
| public void dispatchEvent(Object originalListener, Object l, int action, Object object) { |
| // save the bundle ref to a local variable |
| // to avoid interference from another thread closing this context |
| AbstractBundle tmpBundle = bundle; |
| Object previousTCCL = setContextFinder(); |
| try { |
| if (isValid()) /* if context still valid */{ |
| switch (action) { |
| case Framework.BUNDLEEVENT : |
| case Framework.BUNDLEEVENTSYNC : { |
| BundleListener listener = (BundleListener) l; |
| |
| if (Debug.DEBUG && Debug.DEBUG_EVENTS) { |
| String listenerName = listener.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(listener)); //$NON-NLS-1$ |
| Debug.println("dispatchBundleEvent[" + tmpBundle + "](" + listenerName + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| |
| BundleEvent event = (BundleEvent) object; |
| switch (event.getType()) { |
| case Framework.BATCHEVENT_BEGIN : { |
| if (listener instanceof BatchBundleListener) |
| ((BatchBundleListener) listener).batchBegin(); |
| break; |
| } |
| case Framework.BATCHEVENT_END : { |
| if (listener instanceof BatchBundleListener) |
| ((BatchBundleListener) listener).batchEnd(); |
| break; |
| } |
| default : { |
| listener.bundleChanged((BundleEvent) object); |
| } |
| } |
| break; |
| } |
| |
| case ServiceRegistry.SERVICEEVENT : { |
| ServiceEvent event = (ServiceEvent) object; |
| |
| ServiceListener listener = (ServiceListener) l; |
| if (Debug.DEBUG && Debug.DEBUG_EVENTS) { |
| String listenerName = listener.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(listener)); //$NON-NLS-1$ |
| Debug.println("dispatchServiceEvent[" + tmpBundle + "](" + listenerName + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| listener.serviceChanged(event); |
| |
| break; |
| } |
| |
| case Framework.FRAMEWORKEVENT : { |
| FrameworkListener listener = (FrameworkListener) l; |
| |
| if (Debug.DEBUG && Debug.DEBUG_EVENTS) { |
| String listenerName = listener.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(listener)); //$NON-NLS-1$ |
| Debug.println("dispatchFrameworkEvent[" + tmpBundle + "](" + listenerName + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| |
| listener.frameworkEvent((FrameworkEvent) object); |
| break; |
| } |
| default : { |
| throw new InternalError(); |
| } |
| } |
| } |
| } catch (Throwable t) { |
| if (Debug.DEBUG && Debug.DEBUG_GENERAL) { |
| Debug.println("Exception in bottom level event dispatcher: " + t.getMessage()); //$NON-NLS-1$ |
| Debug.printStackTrace(t); |
| } |
| // allow the adaptor to handle this unexpected error |
| framework.adaptor.handleRuntimeError(t); |
| publisherror: { |
| if (action == Framework.FRAMEWORKEVENT) { |
| FrameworkEvent event = (FrameworkEvent) object; |
| if (event.getType() == FrameworkEvent.ERROR) { |
| break publisherror; // avoid infinite loop |
| } |
| } |
| |
| framework.publishFrameworkEvent(FrameworkEvent.ERROR, tmpBundle, t); |
| } |
| } finally { |
| if (previousTCCL != Boolean.FALSE) |
| Thread.currentThread().setContextClassLoader((ClassLoader) previousTCCL); |
| } |
| } |
| |
| /** |
| * Construct a Filter object. This filter object may be used |
| * to match a ServiceReference or a Dictionary. |
| * See Filter |
| * for a description of the filter string syntax. |
| * |
| * @param filter The filter string. |
| * @return A Filter object encapsulating the filter string. |
| * @exception InvalidSyntaxException If the filter parameter contains |
| * an invalid filter string which cannot be parsed. |
| */ |
| public Filter createFilter(String filter) throws InvalidSyntaxException { |
| checkValid(); |
| |
| return FilterImpl.newInstance(filter); |
| } |
| |
| /** |
| * This method checks that the context is still valid. If the context is |
| * no longer valid, an IllegalStateException is thrown. |
| * |
| * @exception java.lang.IllegalStateException |
| * If the context bundle has stopped. |
| */ |
| public void checkValid() { |
| if (!isValid()) { |
| throw new IllegalStateException(Msg.BUNDLE_CONTEXT_INVALID_EXCEPTION); |
| } |
| } |
| |
| /** |
| * This method checks that the context is still valid. |
| * |
| * @return true if the context is still valid; false otherwise |
| */ |
| protected boolean isValid() { |
| return valid; |
| } |
| |
| public Framework getFramework() { |
| return framework; |
| } |
| } |