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ServantLocatorOperations.java API Doc Java SE 5 API 3043 Fri Aug 26 17:25:04 BST 2005 org.omg.PortableServer

ServantLocatorOperations

public interface ServantLocatorOperations implements org.omg.PortableServer.ServantManagerOperations

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.

Fields Summary
Constructors Summary
Methods Summary
public void postinvoke(byte[] oid, org.omg.PortableServer.POA adapter, java.lang.String operation, java.lang.Object the_cookie, org.omg.PortableServer.Servant the_servant)
This operation is invoked whenener a servant completes a request.
param
oid the object id ssociated with object on which the request was made.
param
adapter the reference for POA in which the object was active.
param
the_cookie an opaque value that contains the data set by preinvoke.
param
the_servant reference to the servant that is associated with the object.
public org.omg.PortableServer.Servant preinvoke(byte[] oid, org.omg.PortableServer.POA adapter, java.lang.String operation, org.omg.PortableServer.ServantLocatorPackage.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.
param
oid the object id associated with object on which the request was made.
param
adapter the reference for POA in which the object is being activated.
param
operation the operation name.
param
the_cookie an opaque value that can be set by the servant manager to be used during postinvoke.
return
Servant used to process incoming request.
exception
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.