org.omg.PortableServer

Class ServantLocatorPOATie

java.lang.Object

org.omg.PortableServer.Servant

org.omg.PortableServer.ServantLocatorPOA

org.omg.PortableServer.ServantLocatorPOATie

All Implemented Interfaces:

InvokeHandler, ServantLocatorOperations, ServantManagerOperations

public class ServantLocatorPOATie
extends ServantLocatorPOA

When the POA has the NON_RETAIN policy it uses servant managers that are ServantLocators. Because the POA knows that the servant returned by this servant manager will be used only for a single request, it can supply extra information to the servant manager's operations and the servant manager's pair of operations may be able to cooperate to do something different than a ServantActivator. When the POA uses the ServantLocator interface, immediately after performing the operation invocation on the servant returned by preinvoke, the POA will invoke postinvoke on the servant manager, passing the ObjectId value and the Servant value as parameters (among others). This feature may be used to force every request for objects associated with a POA to be mediated by the servant manager.

Constructor Summary

Constructors

Constructor and Description
ServantLocatorPOATie(ServantLocatorOperations delegate)
ServantLocatorPOATie(ServantLocatorOperations delegate, POA poa)

Method Summary

Modifier and Type	Method and Description
POA	_default_POA() Returns the root POA from the ORB instance associated with the servant.
ServantLocatorOperations	_delegate()
void	_delegate(ServantLocatorOperations delegate)
void	postinvoke(byte[] oid, POA adapter, String operation, Object the_cookie, Servant the_servant) This operation is invoked whenener a servant completes a request.
Servant	preinvoke(byte[] oid, POA adapter, String operation, CookieHolder the_cookie) This operations is used to get a servant that will be used to process the request that caused preinvoke to be called.

Methods inherited from class org.omg.PortableServer.ServantLocatorPOA

_all_interfaces, _invoke, _this, _this

Methods inherited from class org.omg.PortableServer.Servant

_get_delegate, _get_interface_def, _is_a, _non_existent, _object_id, _orb, _poa, _set_delegate, _this_object, _this_object

Methods inherited from class java.lang.Object

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

Constructor Detail

ServantLocatorPOATie

public ServantLocatorPOATie(ServantLocatorOperations delegate)

ServantLocatorPOATie

public ServantLocatorPOATie(ServantLocatorOperations delegate,
                            POA poa)

Method Detail

_delegate

public ServantLocatorOperations _delegate()

_delegate

public void _delegate(ServantLocatorOperations delegate)

_default_POA

public POA _default_POA()

Description copied from class: Servant

Returns the root POA from the ORB instance associated with the servant. Subclasses may override this method to return a different POA.

Overrides:

_default_POA in class Servant

Returns:

default_POA the POA associated with the Servant.

preinvoke

public Servant preinvoke(byte[] oid,
                         POA adapter,
                         String operation,
                         CookieHolder the_cookie)
                  throws ForwardRequest

This operations is used to get a servant that will be used to process the request that caused preinvoke to be called.

Parameters:

oid - the object id associated with object on which the request was made.

adapter - the reference for POA in which the object is being activated.

operation - the operation name.

the_cookie - an opaque value that can be set by the servant manager to be used during postinvoke.

Returns:

Servant used to process incoming request.

Throws:

ForwardRequest - to indicate to the ORB that it is responsible for delivering the current request and subsequent requests to the object denoted in the forward_reference member of the exception.

postinvoke

public void postinvoke(byte[] oid,
                       POA adapter,
                       String operation,
                       Object the_cookie,
                       Servant the_servant)

This operation is invoked whenener a servant completes a request.

Parameters:

oid - the object id ssociated with object on which the request was made.

adapter - the reference for POA in which the object was active.

the_cookie - an opaque value that contains the data set by preinvoke.

the_servant - reference to the servant that is associated with the object.