org.globus.ogsa.impl.core.registry
Class RegistryPublishProvider

java.lang.Object
  extended byorg.globus.ogsa.impl.core.registry.RegistryPublishProvider
All Implemented Interfaces:
GridServiceCallback, OperationProvider

public class RegistryPublishProvider
extends java.lang.Object
implements OperationProvider, GridServiceCallback

This operation provider allows services to add themselves to remote ServiceGroups, and maintain their entries there. This operation provider takes the following parameter from the service's WSDD properties: registrationConfig - path to the config file for this operation provider. The configuration file is in XML format giving details of each ServiceGroup that the local service should be registered to. Parameters that may be specified in this file (per registration) are: registry - the GSH of the remote registry (ServiceGroup) to register to. This parameter must be specified. keepalive - boolean (default: false) The registration is kept alive with softstate lifetime management. There isn't much point setting this to true unless registry-lifetime is also set. lifetime - integer, number of seconds. default: infinity) The lifetime of the remote registration will be set to this number of seconds. If registry-keepalive is true, then the lifetime will be extended at least twice in this period. If no value is specified, the default of infinity will apply. remove - boolean, defaults to true. detemines if the provider should remove the service from the remote ServiceGroup at local container shutdown Note that the terms 'registry' and 'ServiceGroup' are used interchangeably.


Constructor Summary
RegistryPublishProvider()
           
 
Method Summary
 void activate(GridContext context)
          Called when a service becomes active after having been deactivated.
 void deactivate(GridContext context)
          Called just before a service gets deactivated.
 javax.xml.namespace.QName[] getOperations()
          Called during initialization when the Grid service needs to find out what operations are supported by this provider.
 void initialize(GridServiceBase base)
          Called when the operation provider is added to a grid service.
 void postCreate(GridContext context)
          Called when a service has been created and all of its configuration has been set up.
 void preCreate(GridServiceBase base)
          Called when a service object is created.
 void preDestroy(GridContext context)
          Called just before a service gets destroyed.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RegistryPublishProvider

public RegistryPublishProvider()
Method Detail

initialize

public void initialize(GridServiceBase base)
                throws GridServiceException
Description copied from interface: OperationProvider
Called when the operation provider is added to a grid service.

Specified by:
initialize in interface OperationProvider
Parameters:
base - the service this provider is being associated with
Throws:
GridServiceException - if the initialization (and service creation is to be aborted)

postCreate

public void postCreate(GridContext context)
                throws GridServiceException
Description copied from interface: GridServiceCallback
Called when a service has been created and all of its configuration has been set up.

Specified by:
postCreate in interface GridServiceCallback
Parameters:
context - state information currently associated with the service that was created.
Throws:
GridServiceException - if the service creation should be aborted

getOperations

public javax.xml.namespace.QName[] getOperations()
Description copied from interface: OperationProvider
Called during initialization when the Grid service needs to find out what operations are supported by this provider.

Specified by:
getOperations in interface OperationProvider
Returns:
an array of operation qnames as defined in WSDL. An OperationProvider can use the empty string "" to denote that all operations with a certain local name are implemented. Similarly the wildcard "*" can be used in the local part of the qname to denote that all operations within a certain namespace are implemented. Combining these two approaches and returning: new QName[] {new QName("","*")}, will result in all incoming operations being redirected to this provider (apart from the OGSI defined GridService interface operations provided by the GridServiceBase implementation. Note that individual operations in the OGSI namespace could still be overridded with this approach, but not using the 'all namespaces and all operation' wildcard.

preCreate

public void preCreate(GridServiceBase base)
               throws GridServiceException
Description copied from interface: GridServiceCallback
Called when a service object is created.

Specified by:
preCreate in interface GridServiceCallback
Parameters:
base - the Grid service that is in the process of creating this service object, or if this is a persistent Grid service it points to the service to be created.
Throws:
GridServiceException - if the service should not be created

activate

public void activate(GridContext context)
              throws GridServiceException
Description copied from interface: GridServiceCallback
Called when a service becomes active after having been deactivated. A service is always activated before any methods can be called on it.

Specified by:
activate in interface GridServiceCallback
Parameters:
context - state information currently associated with the service
Throws:
GridServiceException - if the service activation should be aborted

deactivate

public void deactivate(GridContext context)
                throws GridServiceException
Description copied from interface: GridServiceCallback
Called just before a service gets deactivated. When a service is deactivated it is subject to garbage collection, so if state is to be survive deactivation it has to be checkpointed into persistent storage. A deactivated service is however still discoverable by clients.

Specified by:
deactivate in interface GridServiceCallback
Parameters:
context - state information currently associated with the service
Throws:
GridServiceException - if the service deactivation failed

preDestroy

public void preDestroy(GridContext context)
                throws GridServiceException
Description copied from interface: GridServiceCallback
Called just before a service gets destroyed. After this call is made the framework removes all knowledge about the service, so it is a good place to clean up service resources. Note that this call can be triggered both by a client initiated destroy call, as well as a framework initiated softstate timeout.

Specified by:
preDestroy in interface GridServiceCallback
Parameters:
context - state information currently associated with the service
Throws:
GridServiceException - if the destruction failed (will be reported to clients in the case of explicit destroy calls)


Copyright ? 1999 University of Chicago and The University of Southern California. All Rights Reserved.