Package org.apache.dubbo.rpc.listener

Class InjvmExporterListener

java.lang.Object

org.apache.dubbo.rpc.listener.ExporterListenerAdapter

org.apache.dubbo.rpc.listener.InjvmExporterListener

All Implemented Interfaces:

ExporterListener

public class InjvmExporterListener
extends ExporterListenerAdapter

The InjvmExporterListener class is an implementation of the ExporterListenerAdapter abstract class,

which is used to listen for changes to the InjvmExporter instances.

It maintains two ConcurrentHashMaps, one to keep track of the ExporterChangeListeners registered for each service,

and another to keep track of the currently exported services and their associated Exporter instances.

It overrides the exported and unexported methods to add or remove the corresponding Exporter instances to/from

the exporters ConcurrentHashMap, and to notify all registered ExporterChangeListeners of the change.

It also provides methods to add or remove ExporterChangeListeners for a specific service, and to retrieve the

currently exported Exporter instance for a given service.

Constructor Summary

Constructors

Constructor	Description
InjvmExporterListener()

Method Summary

Modifier and Type	Method	Description
void	addExporterChangeListener(ExporterChangeListener listener, String serviceKey)	Adds an ExporterChangeListener for a specific service, and notifies the listener of the current Exporter instance
void	exported(Exporter<?> exporter)	Overrides the exported method to add the given exporter to the exporters ConcurrentHashMap,
void	removeExporterChangeListener(ExporterChangeListener listener, String listenerKey)	Removes an ExporterChangeListener for a specific service.
void	unexported(Exporter<?> exporter)	Overrides the unexported method to remove the given exporter from the exporters ConcurrentHashMap,

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

InjvmExporterListener

public InjvmExporterListener()

Method Details

exported

public void exported(Exporter<?> exporter)
              throws RpcException

Overrides the exported method to add the given exporter to the exporters ConcurrentHashMap,

and to notify all registered ExporterChangeListeners of the export event.

Specified by:

exported in interface ExporterListener

Overrides:

exported in class ExporterListenerAdapter

Parameters:

exporter - The Exporter instance that has been exported.

Throws:

RpcException - If there is an error during the export process.

See Also:

• Protocol.export(Invoker)

unexported

public void unexported(Exporter<?> exporter)
                throws RpcException

Overrides the unexported method to remove the given exporter from the exporters ConcurrentHashMap,

and to notify all registered ExporterChangeListeners of the unexport event.

Specified by:

unexported in interface ExporterListener

Overrides:

unexported in class ExporterListenerAdapter

Parameters:

exporter - The Exporter instance that has been unexported.

Throws:

RpcException - If there is an error during the unexport process.

See Also:

• Exporter.unexport()

addExporterChangeListener

public void addExporterChangeListener(ExporterChangeListener listener,
 String serviceKey)

Adds an ExporterChangeListener for a specific service, and notifies the listener of the current Exporter instance

if it exists.

Parameters:

listener - The ExporterChangeListener to add.

serviceKey - The service key for the service to listen for changes on.

removeExporterChangeListener

public void removeExporterChangeListener(ExporterChangeListener listener,
 String listenerKey)

Removes an ExporterChangeListener for a specific service.

Parameters:

listener - The ExporterChangeListener to remove.

listenerKey - The service key for the service to remove the listener from.