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org.omg.PortableInterceptor
interface RequestInfoOperations

All Known Subinterfaces:
ClientRequestInfoOperations, ServerRequestInfoOperations

public interface RequestInfoOperations

Request Information, accessible to Interceptors.

Each interception point is given an object through which the Interceptor can access request information. Client-side and server-side interception points are concerned with different information, so there are two information objects: ClientRequestInfo is passed to the client-side interception points and ServerRequestInfo is passed to the server-side interception points. But there is information that is common to both, so they both inherit from a common interface: RequestInfo.


Method Summary
 Parameter[]

          Returns an array of Parameter objects, containing the arguments on the operation being invoked.
 String[]

          Returns an array of String objects describing the contexts that may be passed on this operation invocation.
 TypeCode[]

          Returns an array of TypeCode objects describing the TypeCodes of the user exceptions that this operation invocation may throw.
 Object

          Contains the object to which the request will be forwarded, if the reply_status attribute is LOCATION_FORWARD.
 ServiceContext

          Returns a copy of the service context with the given ID that is associated with the reply.
 ServiceContext

          Returns a copy of the service context with the given ID that is associated with the request.
 Any
get_slot(int id)

          Returns the data from the given slot of the PortableInterceptor.Current that is in the scope of the request.
 String

          Returns the name of the operation being invoked.
 String[]

          Returns an array of String objects containing the contexts being sent on the request.
 short

          Describes the state of the result of the operation invocation.
 int

          Returns an id that uniquely identifies an active request/reply sequence.
 boolean

          Indicates whether a response is expected.
 Any

          Returns an any containing the result of the operation invocation.
 short

          Defines how far the request shall progress before control is returned to the client.
 

Method Detail

arguments

public Parameter[] arguments()
Returns an array of Parameter objects, containing the arguments on the operation being invoked. If there are no arguments, this attribute will be a zero length array.

Not all environments provide access to the arguments. With the Java portable bindings, for example, the arguments are not available. In these environments, when this attribute is accessed, NO_RESOURCES will be thrown with a standard minor code of 1.

Note: Arguments are available for DSI/DII calls.


contexts

public String[] contexts()
Returns an array of String objects describing the contexts that may be passed on this operation invocation. If there are no contexts, this will return a zero length array.

Not all environments provide access to the context list. With the Java portable bindings, for example, the context list is not available. In these environments, when this attribute is accessed, NO_RESOURCES will be thrown with a standard minor code of 1.

Note: Contexts are available for DSI/DII calls.


exceptions

public TypeCode[] exceptions()
Returns an array of TypeCode objects describing the TypeCodes of the user exceptions that this operation invocation may throw. If there are no user exceptions, this will return a zero length array.

Not all environments provide access to the exception list. With the Java portable bindings, for example, the exception list is not available. In these environments, when this attribute is accessed, NO_RESOURCES will be thrown with a standard minor code of 1.

Note: Exceptions are available for DSI/DII calls.


forward_reference

public Object forward_reference()
Contains the object to which the request will be forwarded, if the reply_status attribute is LOCATION_FORWARD. It is indeterminate whether a forwarded request will actually occur.


get_reply_service_context

public ServiceContext get_reply_service_context(int id)
Returns a copy of the service context with the given ID that is associated with the reply.

Parameters:
id - The IOP.ServiceId of the service context which is to be returned.
Returns:
The IOP.ServiceContext obtained with the given identifier.

get_request_service_context

public ServiceContext get_request_service_context(int id)
Returns a copy of the service context with the given ID that is associated with the request.

Parameters:
id - The IOP.ServiceId of the service context which is to be returned.
Returns:
The IOP.ServiceContext obtained with the given identifier.

get_slot

public Any get_slot(int id)
             throws InvalidSlot
Returns the data from the given slot of the PortableInterceptor.Current that is in the scope of the request.

If the given slot has not been set, then an any containing a type code with a TCKind value of tk_null is returned.

Parameters:
id - The SlotId of the slot which is to be returned.
Returns:
The slot data, in the form of an any, obtained with the given identifier.
Throws:
InvalidSlot - thrown if the ID does not define an allocated slot.

operation

public String operation()
Returns the name of the operation being invoked.


operation_context

public String[] operation_context()
Returns an array of String objects containing the contexts being sent on the request.

Not all environments provide access to the context. With the Java portable bindings, for example, the context is not available. In these environments, when this attribute is accessed, NO_RESOURCES will be thrown with standard minor code of 1.

Note: operation_context is available for DSI/DII calls.


reply_status

public short reply_status()
Describes the state of the result of the operation invocation. The return value can be one of the following: On the client: On the server:


request_id

public int request_id()
Returns an id that uniquely identifies an active request/reply sequence. Once a request/reply sequence is concluded this ID may be reused. Note that this id is not the same as the GIOP request_id. If GIOP is the transport mechanism used, then these IDs may very well be the same, but this is not guaranteed nor required.


response_expected

public boolean response_expected()
Indicates whether a response is expected.

On the client, a reply is not returned when response_expected is false, so receive_reply cannot be called. receive_other is called unless an exception occurs, in which case receive_exception is called.

On the client, within send_poll, this attribute is true.


result

public Any result()
Returns an any containing the result of the operation invocation. If the operation return type is void, this attribute will be an any containing a type code with a TCKind value of tk_void and no value.

Not all environments provide access to the result. With the Java portable bindings, for example, the result is not available. In these environments, when this attribute is accessed, NO_RESOURCES will be thrown with a standard minor code of 1.

Note: Result is available for DSI/DII calls.


sync_scope

public short sync_scope()
Defines how far the request shall progress before control is returned to the client. This is defined in the Messaging specification, and is pertinent only when response_expected is false. If response_expected is true, the value of sync_scope is undefined. This attribute may have one of the following values: On the server, for all scopes, a reply will be created from the return of the target operation call, but the reply will not return to the client. Although it does not return to the client, it does occur, so the normal server-side interception points are followed (i.e., receive_request_service_contexts, receive_request, send_reply or send_exception).

For SYNC_WITH_SERVER and SYNC_WITH_TARGET, the server does send an empty reply back to the client before the target is invoked. This reply is not intercepted by server-side Interceptors.



This documentation differs from the official API. Jadeite adds extra features to the API including: variable font sizes, constructions examples, placeholders for classes and methods, and auto-generated “See Also” links. Additionally it is missing some items found in standard Javadoc documentation, including: generics type information, “Deprecated” tags and comments, “See Also” links, along with other minor differences. Please send any questions or feedback to bam@cs.cmu.edu.
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