Package com.tangosol.net

Class WrapperInvocationService

java.lang.Object

com.tangosol.net.WrapperService

com.tangosol.net.WrapperInvocationService

All Implemented Interfaces:

ClassLoaderAware, InvocationService, Service, Controllable, Service

public class WrapperInvocationService
extends WrapperService
implements InvocationService

InvocationService implementation that delegates to a wrapped InvocationService instance.

Author:

jh 2010.03.17

Nested Class Summary

Nested classes/interfaces inherited from interface com.tangosol.net.Service

Service.MemberJoinAction

Field Summary

Fields inherited from class com.tangosol.net.WrapperService

m_service

Fields inherited from interface com.tangosol.net.InvocationService

TYPE_DEFAULT, TYPE_REMOTE

Constructor Summary

Constructors

Constructor	Description
WrapperInvocationService(InvocationService service)	Create a new WrapperInvocationService that delegates to the given InvocationService instance.

Method Summary

Modifier and Type	Method	Description
void	execute(Invocable task, Set setMembers, InvocationObserver observer)	Asynchronously invoke the specified task on each of the specified members.
InvocationService	getInvocationService()	Return the wrapped InvocationService.
Map	query(Invocable task, Set setMembers)	Synchronously invoke the specified task on each of the specified members.
String	toString()

Methods inherited from class com.tangosol.net.WrapperService

addMemberListener, addServiceListener, configure, getCluster, getContextClassLoader, getDependencies, getInfo, getMinimumServiceVersion, getResourceRegistry, getSerializer, getService, getUserContext, isRunning, isSuspended, isVersionCompatible, isVersionCompatible, isVersionCompatible, isVersionCompatible, removeMemberListener, removeServiceListener, setContextClassLoader, setDependencies, setUserContext, shutdown, start, stop

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.tangosol.io.ClassLoaderAware

getContextClassLoader, setContextClassLoader

Methods inherited from interface com.tangosol.util.Controllable

configure, isRunning, shutdown, start, stop

Methods inherited from interface com.tangosol.net.Service

addMemberListener, getCluster, getDependencies, getInfo, getMinimumServiceVersion, getResourceRegistry, getSerializer, getUserContext, isSuspended, isVersionCompatible, isVersionCompatible, isVersionCompatible, isVersionCompatible, removeMemberListener, setDependencies, setUserContext

Methods inherited from interface com.tangosol.util.Service

addServiceListener, removeServiceListener

Constructor Detail

WrapperInvocationService

public WrapperInvocationService(InvocationService service)

Create a new WrapperInvocationService that delegates to the given InvocationService instance.

Parameters:

service - the InvocationService to wrap

Method Detail

execute

public void execute(Invocable task,
                    Set setMembers,
                    InvocationObserver observer)

Asynchronously invoke the specified task on each of the specified members. This method may return before the task is executed, or before it finishes executing, or after it finishes executing, or any of the above; however, it is expected that aggressive implementations will attempt to return as quickly as possible.

Specified by:

execute in interface InvocationService

Parameters:

task - the Invocable object to distribute to the specified members in order to be invoked on those members

setMembers - (optional) a set of cluster members to which the Invocable object will be distributed; if null, the Invocable object will be distributed to all cluster members that are running this service

observer - (optional) the InvocationObserver object that will receive notifications related to the Invocable object

query

public Map query(Invocable task,
                 Set setMembers)

Synchronously invoke the specified task on each of the specified members. This method will not return until the specified members have completed their processing, failed in their processing, or died trying.

Members that are specified but are not currently running the InvocationService will not invoke the specified Invocable object. Members that leave (gracefully or otherwise) before the invocation completes will not register a result, and the amount of processing that completed is indeterminate. Members that encounter an exception during invocation will not be retried and no result is returned. Specifically, the result for a given member will not be present under the following conditions:

• if the member did not exist
• if the member was not running the service at the time that the query method was invoked
• if the member left (via the shutdown or stop methods, or unexpectedly) before responding
• if the member encountered an exception while processing and had not registered a non-null result
• if the member completed successfully but registered no result
• if the member completed successfully but explicitly registered a result of null

Specified by:

query in interface InvocationService

Parameters:

task - the Invocable object to distribute to the specified members in order to be invoked on those members

setMembers - (optional) a set of cluster members to which the Invocable object will be distributed; if null, the Invocable object will be distributed to all cluster members that are running this service

Returns:

a Map of result objects keyed by Member object

toString

public String toString()

Overrides:

toString in class WrapperService

getInvocationService

public InvocationService getInvocationService()

Return the wrapped InvocationService.

Returns:

the wrapped InvocationService