org.omg.CORBA.ServerRequest Maven / Gradle / Ivy
Show all versions of openjdk-orb Show documentation
/*
* Copyright (c) 1996, 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package org.omg.CORBA;
/**
* An object that captures the explicit state of a request
* for the Dynamic Skeleton Interface (DSI). This class, the
* cornerstone of the DSI, is analogous to the Request
* object in the DII.
*
* The ORB is responsible for creating this embodiment of a request,
* and delivering it to a Dynamic Implementation Routine (DIR).
* A dynamic servant (a DIR) is created by implementing the
* DynamicImplementation class,
* which has a single invoke method. This method accepts a
* ServerRequest object.
*
* The abstract class ServerRequest defines
* methods for accessing the
* method name, the arguments and the context of the request, as
* well as methods for setting the result of the request either as a
* return value or an exception.
*
* A subtlety with accessing the arguments of the request is that the
* DIR needs to provide type information about the
* expected arguments, since there is no compiled information about
* these. This information is provided through an NVList,
* which is a list of NamedValue objects.
* Each NamedValue object
* contains an Any object, which in turn
* has a TypeCode object representing the type
* of the argument.
*
* Similarly, type information needs to be provided for the response,
* for either the expected result or for an exception, so the methods
* result and except take an Any
* object as a parameter.
*
* @see org.omg.CORBA.DynamicImplementation
* @see org.omg.CORBA.NVList
* @see org.omg.CORBA.NamedValue
*
*/
public abstract class ServerRequest {
/**
* Retrieves the name of the operation being
* invoked. According to OMG IDL's rules, these names must be unique
* among all operations supported by this object's "most-derived"
* interface. Note that the operation names for getting and setting
* attributes are _get_<attribute_name>
* and _set_<attribute_name>,
* respectively.
*
* @return the name of the operation to be invoked
* @deprecated use operation()
*/
@Deprecated
public String op_name()
{
return operation();
}
/**
* Throws an org.omg.CORBA.NO_IMPLEMENT exception.
*
* Retrieves the name of the operation being
* invoked. According to OMG IDL's rules, these names must be unique
* among all operations supported by this object's "most-derived"
* interface. Note that the operation names for getting and setting
* attributes are _get_<attribute_name>
* and _set_<attribute_name>,
* respectively.
*
* @return the name of the operation to be invoked
* @see CORBA
* package comments for unimplemented features
*/
public String operation()
{
throw new org.omg.CORBA.NO_IMPLEMENT();
}
/**
* Specifies method parameter types and retrieves "in" and "inout"
* argument values.
*
* Note that this method is deprecated; use the method
* arguments in its place.
*
* Unless it calls the method set_exception,
* the DIR must call this method exactly once, even if the
* method signature contains no parameters. Once the method
* arguments or set_exception
* has been called, calling arguments on the same
* ServerRequest object
* will result in a BAD_INV_ORDER system exception.
* The DIR must pass in to the method arguments
* an NVList initialized with TypeCodes and Flags
* describing the parameter types for the operation, in the order in which
* they appear in the IDL specification (left to right). A
* potentially-different NVList will be returned from
* arguments, with the
* "in" and "inout" argument values supplied. If it does not call
* the method set_exception,
* the DIR must supply the returned NVList with return
* values for any "out" arguments before returning, and may also change
* the return values for any "inout" arguments.
*
* @param params the arguments of the method, in the
* form of an NVList object
* @deprecated use the method arguments
*/
@Deprecated
public void params(NVList params)
{
arguments(params);
}
/**
* Specifies method parameter types and retrieves "in" and "inout"
* argument values.
* Unless it calls the method set_exception,
* the DIR must call this method exactly once, even if the
* method signature contains no parameters. Once the method
* arguments or set_exception
* has been called, calling arguments on the same
* ServerRequest object
* will result in a BAD_INV_ORDER system exception.
* The DIR must pass in to the method arguments
* an NVList initialized with TypeCodes and Flags
* describing the parameter types for the operation, in the order in which
* they appear in the IDL specification (left to right). A
* potentially-different NVList will be returned from
* arguments, with the
* "in" and "inout" argument values supplied. If it does not call
* the method set_exception,
* the DIR must supply the returned NVList with return
* values for any "out" arguments before returning, and it may also change
* the return values for any "inout" arguments.
*
* @param args the arguments of the method, in the
* form of an NVList
* @see CORBA
* package comments for unimplemented features
*/
public void arguments(org.omg.CORBA.NVList args) {
throw new org.omg.CORBA.NO_IMPLEMENT();
}
/**
* Specifies any return value for the call.
*
* Note that this method is deprecated; use the method
* set_result in its place.
*
* Unless the method
* set_exception is called, if the invoked method
* has a non-void result type, the method set_result
* must be called exactly once before the DIR returns.
* If the operation has a void result type, the method
* set_result may optionally be
* called once with an Any object whose type is
* tk_void. Calling the method set_result before
* the method arguments has been called or after
* the method set_result or set_exception has been
* called will result in a BAD_INV_ORDER exception. Calling the method
* set_result without having previously called
* the method ctx when the IDL operation contains a
* context expression, or when the NVList passed to arguments did not
* describe all parameters passed by the client, may result in a MARSHAL
* system exception.
*
* @param any an Any object containing the return value to be set
* @deprecated use the method set_result
*/
@Deprecated
public void result(Any any)
{
set_result(any);
}
/**
* Throws an org.omg.CORBA.NO_IMPLEMENT exception.
*
* Specifies any return value for the call. Unless the method
* set_exception is called, if the invoked method
* has a non-void result type, the method set_result
* must be called exactly once before the DIR returns.
* If the operation has a void result type, the method
* set_result may optionally be
* called once with an Any object whose type is
* tk_void. Calling the method set_result before
* the method arguments has been called or after
* the method set_result or set_exception has been
* called will result in a BAD_INV_ORDER exception. Calling the method
* set_result without having previously called
* the method ctx when the IDL operation contains a
* context expression, or when the NVList passed to arguments did not
* describe all parameters passed by the client, may result in a MARSHAL
* system exception.
*
* @param any an Any object containing the return value to be set
* @see CORBA
* package comments for unimplemented features
*/
public void set_result(org.omg.CORBA.Any any)
{
throw new org.omg.CORBA.NO_IMPLEMENT();
}
/**
* The DIR may call set_exception at any time to return an exception to the
* client. The Any passed to set_exception must contain either a system
* exception or a user exception specified in the raises expression
* of the invoked operation's IDL definition. Passing in an Any that does
* not
* contain an exception will result in a BAD_PARAM system exception. Passing
* in an unlisted user exception will result in either the DIR receiving a
* BAD_PARAM system exception or in the client receiving an
* UNKNOWN_EXCEPTION system exception.
*
* @param any the Any object containing the exception
* @deprecated use set_exception()
*/
@Deprecated
public void except(Any any)
{
set_exception(any);
}
/**
* Throws an org.omg.CORBA.NO_IMPLEMENT exception.
*
* Returns the given exception to the client. This method
* is invoked by the DIR, which may call it at any time.
* The Any object passed to this method must
* contain either a system
* exception or one of the user exceptions specified in the
* invoked operation's IDL definition. Passing in an
* Any object that does not contain an exception
* will cause a BAD_PARAM system exception to be thrown. Passing
* in an unlisted user exception will result in either the DIR receiving a
* BAD_PARAM system exception or in the client receiving an
* UNKNOWN_EXCEPTION system exception.
*
* @param any the Any object containing the exception
* @exception BAD_PARAM if the given Any object does not
* contain an exception or the exception is an
* unlisted user exception
* @exception UNKNOWN_EXCEPTION if the given exception is an unlisted
* user exception and the DIR did not
* receive a BAD_PARAM exception
* @see CORBA
* package comments for unimplemented features
*/
public void set_exception(Any any)
{
throw new org.omg.CORBA.NO_IMPLEMENT();
}
/**
* Returns the context information specified in IDL for the operation
* when the operation is not an attribute access and the operation's IDL
* definition contains a context expression; otherwise it returns
* a nil Context reference. Calling the method
* ctx before the method arguments has
* been called or after the method ctx,
* set_result, or set_exception
* has been called will result in a
* BAD_INV_ORDER system exception.
*
* @return the context object that is to be used
* to resolve any context strings whose
* values need to be sent with the invocation.
* @exception BAD_INV_ORDER if (1) the method ctx is called
* before the method arguments or
* (2) the method ctx is called
* after calling set_result or
* set_exception
*/
public abstract Context ctx();
}