org.openorb.net
Interface ClientRequest

All Superinterfaces:

ClientRequestInfo, ClientRequestInfoOperations, IDLEntity, Object, RequestInfo, RequestInfoOperations, java.io.Serializable

All Known Implementing Classes:

AbstractClientRequest

public interface ClientRequest

extends ClientRequestInfo

Interface for client requests. The client request holds all the data concering a request. The client request object is responsible for request state management, managing interception points and the various policies affecting a single request.

Version:

$Revision: 1.5 $ $Date: 2002/06/28 08:59:05 $

Author:

Chris Wood

Field Summary

static short	OBJECT_HERE Extra reply status denoting a locate request found the object.
static int	STATE_COMPLETE Request is complete.
static int	STATE_CREATED Request created.
static int	STATE_MARSHAL While in MARSHAL arguments are marshaled into the input stream and message fragments may be sent.
static int	STATE_UNMARSHAL Response is being unmarshaled.
static int	STATE_WAITING Waiting for a response from the server.
static short	UNKNOWN_OBJECT Extra reply status denoting a locate request where the object is not found

Method Summary

Address	address() Client address
OutputStream	begin_marshal() Begin marshalling arguments.
boolean	cancel(SystemException ex) Cancel the request with the specified system exception reply.
ClientChannel	channel() Client channel
IOR	effective_target_ior() Get the effective target IOR.
IOR	forward_reference_ior() Get the ior associated with a forward reference.
ServiceContext[]	get_request_service_contexts() Get all request service contexts that have been set.
java.lang.Object	get_transport_association() Get the transport association.
boolean	is_locate() This returns true if this request is a locate request.
boolean	is_poll() Request is a poll.
boolean	is_request() This returns true if this request is a standard request.
ORB	orb() ORB associated with the target.
boolean	poll_response() Poll to see if a response is available from the target.
InputStream	receive_response() Get the response output stream.
java.lang.String	received_exception_id() Get the ID of the system exception which would be contained in the any returned from receive_exception.
SystemException	received_system_exception() Get the system exception which would be contained in the any returned from receive_exception.
int	send_request() When this returns the last fragment of the request has been sent.
int	state() Current request state.
IOR	target_ior() Get the target IOR.
int	wait_for_response(long timeout) Wait for a response from the server.

Methods inherited from interface org.omg.PortableInterceptor.ClientRequestInfoOperations

add_request_service_context, effective_profile, effective_target, get_effective_component, get_effective_components, get_request_policy, received_exception, target

Methods inherited from interface org.omg.PortableInterceptor.RequestInfoOperations

arguments, contexts, exceptions, forward_reference, get_reply_service_context, get_request_service_context, get_slot, operation_context, operation, reply_status, request_id, response_expected, result, sync_scope

Methods inherited from interface org.omg.CORBA.Object

_create_request, _create_request, _duplicate, _get_domain_managers, _get_interface_def, _get_interface, _get_policy, _hash, _is_a, _is_equivalent, _non_existent, _release, _request, _set_policy_override

Field Detail

OBJECT_HERE

public static final short OBJECT_HERE

Extra reply status denoting a locate request found the object.

UNKNOWN_OBJECT

public static final short UNKNOWN_OBJECT

Extra reply status denoting a locate request where the object is not found

STATE_CREATED

public static final int STATE_CREATED

Request created. Client side interception points send_request/send_poll are called while in this state.

STATE_MARSHAL

public static final int STATE_MARSHAL

While in MARSHAL arguments are marshaled into the input stream and message fragments may be sent.

STATE_WAITING

public static final int STATE_WAITING

Waiting for a response from the server.

STATE_UNMARSHAL

public static final int STATE_UNMARSHAL

Response is being unmarshaled. This state is reached when a reply is arriving and reply_status is either SUCESSFUL or USER_EXCEPTION. Terminating client side interceptors will not have been called yet.

STATE_COMPLETE

public static final int STATE_COMPLETE

Request is complete. Last fragment has been unmarshalled and all terminating interception points have occoured. To determine the exact response call the reply_status function.

Method Detail

channel

public ClientChannel channel()

Client channel

address

public Address address()

Client address

orb

public ORB orb()

ORB associated with the target.

target_ior

public IOR target_ior()

Get the target IOR. This calls ior() on the object passed with creation

effective_target_ior

public IOR effective_target_ior()

Get the effective target IOR. This gets the IOR from the address passed in creation. Calling this function instead of effective_target avoids constructing an enclosing delegate/object.

get_transport_association

public java.lang.Object get_transport_association()

Get the transport association.

state

public int state()

Current request state.

cancel

public boolean cancel(SystemException ex)

Cancel the request with the specified system exception reply. This is valid in any state apart from COMPLETE. This may result in cancel messages being sent to the server. If the cancel is successful state changes to COMPLETED/SYSTEM_EXCEPTION. If the provided exception's status is set to null the exception thown will set the exception status according to the request's state.

Returns:

true if the request is succesfully canceled.

is_request

public boolean is_request()

This returns true if this request is a standard request. While in the CREATED state it is valid to call any client request info operations which would be valid in the client side interception points send_request. The send_request interception points are called while in this state.

is_poll

public boolean is_poll()

Request is a poll. While in the CREATED state it is valid to call any client request info operations which would be valid in the client side interception points send_poll. The send_poll interception points are called while in this state.

is_locate

public boolean is_locate()

This returns true if this request is a locate request. Client side interceptors are not called for locate requests. ClientRequestInfo operations: arguments, exceptions, contexts, operation_context, result, get_request_service_context, get_reply_service_context, add_request_service_context are not valid. operation returns the empty string "", response_expected returns true. Note the extra values for reply_status, UNKNOWN_OBJECT and OBJECT_HERE

begin_marshal

public OutputStream begin_marshal()

Begin marshalling arguments. Valid in CREATED state. All client side interception points send_request/send_poll complete and state changes to MARSHAL. If no arguments are required for marshalling this can enter the MARSHAL state and return null, this occours for locate requests and polls only. This may also return null if entering COMPLETE/SYSTEM_EXCEPTION/COMPLETED_NO, COMPLETE/LOCATION_FORWARD or COMPLETE/LOCATION_FORWARD_PERMINENT due to communication problems or client side interceptors.

get_request_service_contexts

public ServiceContext[] get_request_service_contexts()

Get all request service contexts that have been set. From MARSHAL onward this will be a constant list.

send_request

public int send_request()

When this returns the last fragment of the request has been sent. In MARSHAL state changes to WAITING or COMPLETE. This may result in entering COMPLETE/SYSTEM_EXCEPTION/COMPLETED_NO, COMPLETE/LOCATION_FORWARD or COMPLETE/LOCATION_FORWARD_PERMINENT due to communication problems.

Returns:

new state. May be WAITING or COMPLETE.

poll_response

public boolean poll_response()

Poll to see if a response is available from the target. If in the WAITING state this will return true if wait_for_response would not have to wait for a response. In the UNMARSHAL and COMPLETE states this returns true, It is illegal to call this function in all other states.

wait_for_response

public int wait_for_response(long timeout)

Wait for a response from the server. When this returns either the given wait_time has expired (WAITING), a response has arrived from the server (UNMARSHAL or COMPLETE), a transport error has occoured (COMPLETE), or for requests where no response is expected the sync scope is satisfied (COMPLETE). The request state will not exit the WAITING state unless this function is called.

Parameters:

timeout - Maximum amount of time to wait for response. 0 to wait forever, > 0 for some timeout (in ms)

Returns:

new state. May be WAITING, UNMARSHAL or COMPLETE.

receive_response

public InputStream receive_response()

Get the response output stream. This function is valid in the UNMARSHAL state when reply_status is SUCESSFUL or USER_EXCEPTION. The returned input stream may throw a system exception with status COMPLETED_YES at any time.

forward_reference_ior

public IOR forward_reference_ior()

Get the ior associated with a forward reference. Calling this function instead of forward_reference avoids creating an enclosing delegate/object. This function is valid in the COMPLETE/LOCATION_FORWARD.

received_system_exception

public SystemException received_system_exception()

Get the system exception which would be contained in the any returned from receive_exception. This function is valid in the COMPLETE/SYSTEM_EXCEPTION state.

received_exception_id

public java.lang.String received_exception_id()

Get the ID of the system exception which would be contained in the any returned from receive_exception. This function is valid in the COMPLETE/SYSTEM_EXCEPTION, UNMARSHAL/USER_EXCEPTION and COMPLETE/USER_EXCEPTION states.

Specified by:

received_exception_id in interface ClientRequestInfoOperations

Following copied from interface: org.omg.PortableInterceptor.ClientRequestInfoOperations

Returns:

the attribute value