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 /*
  * Copyright (c) OSGi Alliance (2001, 2011). All Rights Reserved.
  * 
  * Licensed 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.osgi.framework;

A synchronous BundleEvent listener. SynchronousBundleListener is a listener interface that may be implemented by a bundle developer. When a BundleEvent is fired, it is synchronously delivered to a SynchronousBundleListener. The Framework may deliver BundleEvent objects to a SynchronousBundleListener out of order and may concurrently call and/or reenter a SynchronousBundleListener.

For BundleEvent types STARTED and LAZY_ACTIVATION, the Framework must not hold the referenced bundle's "state change" lock when the BundleEvent is delivered to a SynchronousBundleListener. For the other BundleEvent types, the Framework must hold the referenced bundle's "state change" lock when the BundleEvent is delivered to a SynchronousBundleListener. A SynchronousBundleListener cannot directly call life cycle methods on the referenced bundle when the Framework is holding the referenced bundle's "state change" lock.

A SynchronousBundleListener object is registered with the Framework using the BundleContext.addBundleListener(org.osgi.framework.BundleListener) method. SynchronousBundleListener objects are called with a BundleEvent object when a bundle has been installed, resolved, starting, started, stopping, stopped, updated, unresolved, or uninstalled.

Unlike normal BundleListener objects, SynchronousBundleListeners are synchronously called during bundle lifecycle processing. The bundle lifecycle processing will not proceed until all SynchronousBundleListeners have completed. SynchronousBundleListener objects will be called prior to BundleListener objects.

AdminPermission[bundle,LISTENER] is required to add or remove a SynchronousBundleListener object.

Version:
$Id: 74246f4ceeba7f9a5ee198048522f93d4691c51a $
Since:
1.1
See also:
BundleEvent
ThreadSafe:
public interface SynchronousBundleListener extends BundleListener {
	// This is a marker interface
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