ServantLocatorHelper (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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org.omg.PortableServer
Class ServantLocatorHelper

java.lang.Object
  |
  +--org.omg.PortableServer.ServantLocatorHelper

public abstract class ServantLocatorHelper
extends Object

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

ServantLocatorHelper()


Method Summary

static ServantLocator extract(Any a)


static String id()


static void insert(Any a, ServantLocator that)


static ServantLocator narrow(Object obj)


static ServantLocator read(InputStream istream)


static TypeCode type()


static void write(OutputStream ostream, ServantLocator value)


Methods inherited from class java.lang.Object

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

Constructor Detail