Package org.omg.PortableServer
Class ServantLocatorPOA
java.lang.Object
org.omg.PortableServer.Servant
org.omg.PortableServer.ServantLocatorPOA
- All Implemented Interfaces:
InvokeHandler
,ServantLocatorOperations
,ServantManagerOperations
- Direct Known Subclasses:
ServantLocatorPOATie
public abstract class ServantLocatorPOA
extends Servant
implements ServantLocatorOperations, InvokeHandler
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.
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionString[]
_all_interfaces
(POA poa, byte[] objectId) Used by the ORB to obtain complete type information from the servant._invoke
(String $method, InputStream in, ResponseHandler $rh) Invoked by the ORB to dispatch a request to the servant._this()
Methods inherited from class org.omg.PortableServer.Servant
_default_POA, _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
Methods inherited from interface org.omg.PortableServer.ServantLocatorOperations
postinvoke, preinvoke
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Field Details
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_methods
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__ids
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Constructor Details
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ServantLocatorPOA
public ServantLocatorPOA()
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Method Details
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_invoke
Description copied from interface:InvokeHandler
Invoked by the ORB to dispatch a request to the servant. ORB passes the method name, an InputStream containing the marshalled arguments, and a ResponseHandler which the servant uses to construct a proper reply. Only CORBA SystemException may be thrown by this method. The method must return an OutputStream created by the ResponseHandler which contains the marshalled reply. A servant must not retain a reference to the ResponseHandler beyond the lifetime of a method invocation. Servant behaviour is defined as follows:1. Determine correct method, and unmarshal parameters from InputStream.
2. Invoke method implementation.
3. If no user exception, create a normal reply using ResponseHandler.
4. If user exception occurred, create exception reply using ResponseHandler.
5. Marshal reply into OutputStream returned by ResponseHandler.
6. Return OutputStream to ORB.
- Specified by:
_invoke
in interfaceInvokeHandler
- Parameters:
$method
- The method name.in
- TheInputStream
containing the marshalled arguments.$rh
- TheResponseHandler
which the servant uses to construct a proper reply- Returns:
- The
OutputStream
created by the ResponseHandler which contains the marshalled reply
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_all_interfaces
Description copied from class:Servant
Used by the ORB to obtain complete type information from the servant.- Specified by:
_all_interfaces
in classServant
- Parameters:
poa
- POA with which the servant is associated.objectId
- is the id corresponding to the object associated with this servant.- Returns:
- list of type information for the object.
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_this
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_this
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