Package org.apache.felix.scr.impl
Class AbstractExtender
- java.lang.Object
-
- org.apache.felix.scr.impl.AbstractExtender
-
- All Implemented Interfaces:
java.util.EventListener
,org.osgi.framework.BundleActivator
,org.osgi.framework.BundleListener
,org.osgi.framework.SynchronousBundleListener
,org.osgi.util.tracker.BundleTrackerCustomizer<org.osgi.framework.Bundle>
- Direct Known Subclasses:
Activator
public abstract class AbstractExtender extends java.lang.Object implements org.osgi.framework.BundleActivator, org.osgi.util.tracker.BundleTrackerCustomizer<org.osgi.framework.Bundle>, org.osgi.framework.SynchronousBundleListener
Base class to write bundle extenders. This extender tracks started bundles (or starting if they have a lazy activation policy) and will create an extension for each of them to manage it. The extender will handle all concurrency and synchronization issues. The extender guarantee that all extensions will be stopped synchronously with the STOPPING event of a given bundle and that all extensions will be stopped before the extender bundle is stopped.
-
-
Field Summary
Fields Modifier and Type Field Description private org.osgi.framework.BundleContext
context
private java.util.concurrent.ConcurrentMap<org.osgi.framework.Bundle,java.util.concurrent.FutureTask<java.lang.Void>>
destroying
private java.util.concurrent.ConcurrentMap<org.osgi.framework.Bundle,Activator.ScrExtension>
extensions
private boolean
stopped
private boolean
stopping
private org.osgi.util.tracker.BundleTracker<org.osgi.framework.Bundle>
tracker
-
Constructor Summary
Constructors Constructor Description AbstractExtender()
-
Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description org.osgi.framework.Bundle
addingBundle(org.osgi.framework.Bundle bundle, org.osgi.framework.BundleEvent event)
void
bundleChanged(org.osgi.framework.BundleEvent event)
protected java.util.Collection<org.osgi.framework.Bundle>
chooseBundlesToDestroy(java.util.Set<org.osgi.framework.Bundle> bundles)
protected java.util.concurrent.ExecutorService
createExecutor()
Create the executor used to start extensions asynchronously.private void
createExtension(org.osgi.framework.Bundle bundle)
protected abstract void
debug(org.osgi.framework.Bundle bundle, java.lang.String msg)
private void
destroyExtension(org.osgi.framework.Bundle bundle)
protected abstract Activator.ScrExtension
doCreateExtension(org.osgi.framework.Bundle bundle)
Create the extension for the given bundle, or null if the bundle is not to be extended.protected void
doStart()
protected void
doStop()
org.osgi.framework.BundleContext
getBundleContext()
boolean
isStopping()
void
modifiedBundle(org.osgi.framework.Bundle bundle, org.osgi.framework.BundleEvent event, org.osgi.framework.Bundle object)
void
removedBundle(org.osgi.framework.Bundle bundle, org.osgi.framework.BundleEvent event, org.osgi.framework.Bundle object)
void
start(org.osgi.framework.BundleContext context)
protected void
startTracking()
void
stop(org.osgi.framework.BundleContext context)
protected void
stopTracking()
protected abstract void
warn(org.osgi.framework.Bundle bundle, java.lang.String msg, java.lang.Throwable t)
-
-
-
Field Detail
-
extensions
private final java.util.concurrent.ConcurrentMap<org.osgi.framework.Bundle,Activator.ScrExtension> extensions
-
destroying
private final java.util.concurrent.ConcurrentMap<org.osgi.framework.Bundle,java.util.concurrent.FutureTask<java.lang.Void>> destroying
-
stopping
private volatile boolean stopping
-
stopped
private volatile boolean stopped
-
context
private org.osgi.framework.BundleContext context
-
tracker
private org.osgi.util.tracker.BundleTracker<org.osgi.framework.Bundle> tracker
-
-
Method Detail
-
getBundleContext
public org.osgi.framework.BundleContext getBundleContext()
-
isStopping
public boolean isStopping()
-
start
public void start(org.osgi.framework.BundleContext context) throws java.lang.Exception
- Specified by:
start
in interfaceorg.osgi.framework.BundleActivator
- Throws:
java.lang.Exception
-
stop
public void stop(org.osgi.framework.BundleContext context) throws java.lang.Exception
- Specified by:
stop
in interfaceorg.osgi.framework.BundleActivator
- Throws:
java.lang.Exception
-
doStart
protected void doStart() throws java.lang.Exception
- Throws:
java.lang.Exception
-
doStop
protected void doStop() throws java.lang.Exception
- Throws:
java.lang.Exception
-
startTracking
protected void startTracking()
-
stopTracking
protected void stopTracking()
-
createExecutor
protected java.util.concurrent.ExecutorService createExecutor()
Create the executor used to start extensions asynchronously.- Returns:
- an
-
chooseBundlesToDestroy
protected java.util.Collection<org.osgi.framework.Bundle> chooseBundlesToDestroy(java.util.Set<org.osgi.framework.Bundle> bundles)
-
bundleChanged
public void bundleChanged(org.osgi.framework.BundleEvent event)
- Specified by:
bundleChanged
in interfaceorg.osgi.framework.BundleListener
-
addingBundle
public org.osgi.framework.Bundle addingBundle(org.osgi.framework.Bundle bundle, org.osgi.framework.BundleEvent event)
- Specified by:
addingBundle
in interfaceorg.osgi.util.tracker.BundleTrackerCustomizer<org.osgi.framework.Bundle>
-
modifiedBundle
public void modifiedBundle(org.osgi.framework.Bundle bundle, org.osgi.framework.BundleEvent event, org.osgi.framework.Bundle object)
- Specified by:
modifiedBundle
in interfaceorg.osgi.util.tracker.BundleTrackerCustomizer<org.osgi.framework.Bundle>
-
removedBundle
public void removedBundle(org.osgi.framework.Bundle bundle, org.osgi.framework.BundleEvent event, org.osgi.framework.Bundle object)
- Specified by:
removedBundle
in interfaceorg.osgi.util.tracker.BundleTrackerCustomizer<org.osgi.framework.Bundle>
-
createExtension
private void createExtension(org.osgi.framework.Bundle bundle)
-
destroyExtension
private void destroyExtension(org.osgi.framework.Bundle bundle)
-
doCreateExtension
protected abstract Activator.ScrExtension doCreateExtension(org.osgi.framework.Bundle bundle) throws java.lang.Exception
Create the extension for the given bundle, or null if the bundle is not to be extended.- Parameters:
bundle
- the bundle to extend- Returns:
- The extension
- Throws:
java.lang.Exception
- If something goes wrong
-
debug
protected abstract void debug(org.osgi.framework.Bundle bundle, java.lang.String msg)
-
warn
protected abstract void warn(org.osgi.framework.Bundle bundle, java.lang.String msg, java.lang.Throwable t)
-
-