ACE  6.3.4
Public Types | Public Member Functions | Protected Attributes | List of all members
ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS > Class Template Reference

Defines the interface for a service that exchanges data with its connected peer. More...

#include <Svc_Handler.h>

Inheritance diagram for ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >:
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Collaboration diagram for ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >:
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Public Types

typedef PEER_STREAM::PEER_ADDR addr_type
 
typedef PEER_STREAM stream_type
 
- Public Types inherited from ACE_Event_Handler
enum  {
  LO_PRIORITY = 0, HI_PRIORITY = 10, NULL_MASK = 0, READ_MASK = (1 << 0),
  WRITE_MASK = (1 << 1), EXCEPT_MASK = (1 << 2), ACCEPT_MASK = (1 << 3), CONNECT_MASK = (1 << 4),
  TIMER_MASK = (1 << 5), QOS_MASK = (1 << 6), GROUP_QOS_MASK = (1 << 7), SIGNAL_MASK = (1 << 8),
  ALL_EVENTS_MASK, RWE_MASK, DONT_CALL = (1 << 9)
}
 
enum  { ACE_EVENT_HANDLER_NOT_RESUMED = -1, ACE_REACTOR_RESUMES_HANDLER = 0, ACE_APPLICATION_RESUMES_HANDLER }
 
typedef long Reference_Count
 Reference count type. More...
 

Public Member Functions

 ACE_Svc_Handler (ACE_Thread_Manager *thr_mgr=0, ACE_Message_Queue< SYNCH_TRAITS > *mq=0, ACE_Reactor *reactor=ACE_Reactor::instance())
 
virtual ~ACE_Svc_Handler (void)
 Destructor. More...
 
virtual int open (void *acceptor_or_connector=0)
 
virtual int close (u_long flags=0)
 
virtual int idle (u_long flags=0)
 
virtual ACE_Recyclable_State recycle_state (void) const
 
virtual int recycle_state (ACE_Recyclable_State new_state)
 
virtual void cleanup_hint (void **act_holder=0)
 
virtual int init (int argc, ACE_TCHAR *argv[])
 
virtual int fini (void)
 
virtual int info (ACE_TCHAR **info_string, size_t length) const
 
virtual int handle_close (ACE_HANDLE=ACE_INVALID_HANDLE, ACE_Reactor_Mask=ACE_Event_Handler::ALL_EVENTS_MASK)
 
virtual int handle_timeout (const ACE_Time_Value &time, const void *)
 
virtual ACE_HANDLE get_handle (void) const
 Get the underlying handle associated with the <peer_>. More...
 
virtual void set_handle (ACE_HANDLE)
 Set the underlying handle associated with the <peer_>. More...
 
PEER_STREAM & peer (void) const
 
void * operator new (size_t n)
 
void * operator new (size_t n, void *p)
 This operator permits "placement new" on a per-object basis. More...
 
virtual void destroy (void)
 
void operator delete (void *)
 
void operator delete (void *, void *)
 
void shutdown (void)
 Close down the descriptor and unregister from the Reactor. More...
 
void dump (void) const
 Dump the state of an object. More...
 
virtual void recycler (ACE_Connection_Recycling_Strategy *recycler, const void *recycling_act)
 
virtual ACE_Connection_Recycling_Strategyrecycler (void) const
 Get the recycler. More...
 
virtual const void * recycling_act (void) const
 Get the recycling act. More...
 
virtual int recycle (void *=0)
 
- Public Member Functions inherited from ACE_Task< SYNCH_TRAITS >
 ACE_Task (ACE_Thread_Manager *thr_mgr=0, ACE_Message_Queue< ACE_SYNCH_USE, ACE_System_Time_Policy > *mq=0)
 
virtual ~ACE_Task (void)
 Destructor. More...
 
ACE_Message_Queue< ACE_SYNCH_USE, ACE_System_Time_Policy > * msg_queue (void)
 Gets the message queue associated with this task. More...
 
void msg_queue (ACE_Message_Queue< ACE_SYNCH_USE, ACE_System_Time_Policy > *)
 Sets the message queue associated with this task. More...
 
ACE_Time_Value_T< ACE_System_Time_Policygettimeofday (void) const
 
void set_time_policy (ACE_System_Time_Policyconst &time_policy)
 
int putq (ACE_Message_Block *, ACE_Time_Value *timeout=0)
 
int getq (ACE_Message_Block *&mb, ACE_Time_Value *timeout=0)
 
int ungetq (ACE_Message_Block *, ACE_Time_Value *timeout=0)
 
int reply (ACE_Message_Block *mb, ACE_Time_Value *tv=0)
 
int put_next (ACE_Message_Block *msg, ACE_Time_Value *timeout=0)
 
const ACE_TCHARname (void) const
 
ACE_Task< ACE_SYNCH_USE, ACE_System_Time_Policy > * next (void)
 Get next Task pointer. More...
 
void next (ACE_Task< ACE_SYNCH_USE, ACE_System_Time_Policy > *)
 Set next Task pointer. More...
 
ACE_Task< ACE_SYNCH_USE, ACE_System_Time_Policy > * sibling (void)
 
ACE_Module< ACE_SYNCH_USE, ACE_System_Time_Policy > * module (void) const
 Return the Task's Module if there is one, else returns 0. More...
 
int flush (u_long flag=ACE_Task_Flags::ACE_FLUSHALL)
 
void water_marks (ACE_IO_Cntl_Msg::ACE_IO_Cntl_Cmds, size_t)
 Manipulate watermarks. More...
 
void dump (void) const
 Dump the state of an object. More...
 
- Public Member Functions inherited from ACE_Task_Base
 ACE_Task_Base (ACE_Thread_Manager *=0)
 Constructor. More...
 
virtual ~ACE_Task_Base (void)
 Destructor. More...
 
virtual int module_closed (void)
 
virtual int put (ACE_Message_Block *, ACE_Time_Value *=0)
 Default ACE_Task put routine. More...
 
virtual int svc (void)
 Run by a daemon thread to handle deferred processing. More...
 
virtual int activate (long flags=THR_NEW_LWP|THR_JOINABLE|THR_INHERIT_SCHED, int n_threads=1, int force_active=0, long priority=ACE_DEFAULT_THREAD_PRIORITY, int grp_id=-1, ACE_Task_Base *task=0, ACE_hthread_t thread_handles[]=0, void *stack[]=0, size_t stack_size[]=0, ACE_thread_t thread_ids[]=0, const char *thr_name[]=0)
 
virtual int wait (void)
 Wait for all threads running in a task to exit. More...
 
virtual int suspend (void)
 Suspend a task. More...
 
virtual int resume (void)
 Resume a suspended task. More...
 
int grp_id (void) const
 Get the current group id. More...
 
void grp_id (int)
 Set the current group id. More...
 
ACE_Thread_Managerthr_mgr (void) const
 Get the thread manager associated with this Task. More...
 
void thr_mgr (ACE_Thread_Manager *)
 Set the thread manager associated with this Task. More...
 
int is_reader (void) const
 True if queue is a reader, else false. More...
 
int is_writer (void) const
 True if queue is a writer, else false. More...
 
size_t thr_count (void) const
 
ACE_thread_t last_thread (void) const
 
- Public Member Functions inherited from ACE_Service_Object
 ACE_Service_Object (ACE_Reactor *=0)
 Constructor. More...
 
virtual ~ACE_Service_Object (void)
 Destructor. More...
 
- Public Member Functions inherited from ACE_Event_Handler
virtual ~ACE_Event_Handler (void)
 Destructor is virtual to enable proper cleanup. More...
 
virtual int priority (void) const
 
virtual void priority (int priority)
 Set the priority of the Event_Handler. More...
 
virtual int handle_input (ACE_HANDLE fd=ACE_INVALID_HANDLE)
 Called when input events occur (e.g., connection or data). More...
 
virtual int handle_output (ACE_HANDLE fd=ACE_INVALID_HANDLE)
 
virtual int handle_exception (ACE_HANDLE fd=ACE_INVALID_HANDLE)
 Called when an exceptional events occur (e.g., SIGURG). More...
 
virtual int handle_exit (ACE_Process *)
 Called when a process exits. More...
 
virtual int handle_signal (int signum, siginfo_t *=0, ucontext_t *=0)
 
virtual int resume_handler (void)
 
virtual int handle_qos (ACE_HANDLE=ACE_INVALID_HANDLE)
 
virtual int handle_group_qos (ACE_HANDLE=ACE_INVALID_HANDLE)
 
virtual void reactor (ACE_Reactor *reactor)
 Set the event demultiplexors. More...
 
virtual ACE_Reactorreactor (void) const
 Get the event demultiplexors. More...
 
virtual ACE_Reactor_Timer_Interfacereactor_timer_interface (void) const
 Get only the reactor's timer related interface. More...
 
virtual Reference_Count add_reference (void)
 Increment reference count on the handler. More...
 
virtual Reference_Count remove_reference (void)
 Decrement reference count on the handler. More...
 
Reference_Counting_Policyreference_counting_policy (void)
 Current Reference_Counting_Policy. More...
 
- Public Member Functions inherited from ACE_Shared_Object
 ACE_Shared_Object (void)
 Constructor. More...
 
virtual ~ACE_Shared_Object (void)
 Destructor. More...
 

Protected Attributes

PEER_STREAM peer_
 Maintain connection with client. More...
 
bool dynamic_
 Have we been dynamically created? More...
 
bool closing_
 
ACE_Connection_Recycling_Strategyrecycler_
 Pointer to the connection recycler. More...
 
const void * recycling_act_
 
- Protected Attributes inherited from ACE_Task_Base
size_t thr_count_
 
ACE_Thread_Managerthr_mgr_
 Multi-threading manager. More...
 
u_long flags_
 ACE_Task flags. More...
 
int grp_id_
 This maintains the group id of the Task. More...
 
ACE_thread_t last_thread_id_
 Holds the thread ID of the last thread to exit svc() in this object. More...
 
- Protected Attributes inherited from ACE_Event_Handler
Atomic_Reference_Count reference_count_
 Reference count. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from ACE_Task_Base
static ACE_THR_FUNC_RETURN svc_run (void *)
 Routine that runs the service routine as a daemon thread. More...
 
static void cleanup (void *object, void *params)
 
- Static Public Member Functions inherited from ACE_Event_Handler
static ACE_THR_FUNC_RETURN read_adapter (void *event_handler)
 
static int register_stdin_handler (ACE_Event_Handler *eh, ACE_Reactor *reactor, ACE_Thread_Manager *thr_mgr, int flags=THR_DETACHED)
 
static int remove_stdin_handler (ACE_Reactor *reactor, ACE_Thread_Manager *thr_mgr)
 Performs the inverse of the register_stdin_handler() method. More...
 
- Public Attributes inherited from ACE_Task< SYNCH_TRAITS >
ACE_Message_Queue< ACE_SYNCH_USE, ACE_System_Time_Policy > * msg_queue_
 Queue of messages on the ACE_Task.. More...
 
bool delete_msg_queue_
 true if should delete Message_Queue, false otherwise. More...
 
ACE_Module< ACE_SYNCH_USE, ACE_System_Time_Policy > * mod_
 Back-pointer to the enclosing module. More...
 
ACE_Task< ACE_SYNCH_USE, ACE_System_Time_Policy > * next_
 Pointer to adjacent ACE_Task. More...
 
 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks. More...
 
- Public Attributes inherited from ACE_Service_Object
 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks. More...
 
- Protected Types inherited from ACE_Event_Handler
typedef ACE_Atomic_Op< ACE_SYNCH_MUTEX, Reference_CountAtomic_Reference_Count
 Typedef for implementation of reference counting. More...
 
- Protected Member Functions inherited from ACE_Event_Handler
 ACE_Event_Handler (ACE_Reactor *=0, int priority=ACE_Event_Handler::LO_PRIORITY)
 Force ACE_Event_Handler to be an abstract base class. More...
 

Detailed Description

template<typename PEER_STREAM, typename SYNCH_TRAITS>
class ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >

Defines the interface for a service that exchanges data with its connected peer.

This class provides a well-defined interface that the ACE_Acceptor and ACE_Connector factories use as their target. Typically, client applications will subclass ACE_Svc_Handler and do all the interesting work in the subclass. An ACE_Svc_Handler is parameterized by concrete types that conform to the interfaces of PEER_ACCEPTOR and SYNCH_TRAITS described below.

Template Parameters
PEER_STREAMThe name of the class that implements the PEER_STREAM endpoint (e.g., ACE_SOCK_Stream) that is contained in an ACE_Svc_Handler and initialized by an ACE_Acceptor or ACE_Connector when a connection is established successfully. A PEER_STREAM implementation must provide a PEER_ADDR trait (e.g., ACE_INET_Addr to identify the type of address used by the endpoint. This endpoint is used to exchange data between a ACE_Svc_Handler and the peer it is connected with.
SYNCH_TRAITSThe name of the synchronization traits class that will be used by the ACE_Svc_Handler (e.g., ACE_NULL_SYNCH or ACE_MT_SYNCH). The synchronization traits class provides typedefs for the mutex, condition, and semaphore implementations the ACE_Svc_Handler will use.
See also
Synch_Traits.h.

Member Typedef Documentation

template<typename PEER_STREAM , typename SYNCH_TRAITS >
typedef PEER_STREAM::PEER_ADDR ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::addr_type
template<typename PEER_STREAM , typename SYNCH_TRAITS >
typedef PEER_STREAM ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::stream_type

Constructor & Destructor Documentation

template<typename PEER_STREAM , typename SYNCH_TRAITS >
ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::ACE_Svc_Handler ( ACE_Thread_Manager thr_mgr = 0,
ACE_Message_Queue< SYNCH_TRAITS > *  mq = 0,
ACE_Reactor reactor = ACE_Reactor::instance () 
)

Constructor initializes the thr_mgr and mq by passing them down to the ACE_Task base class. The reactor is passed to the ACE_Event_Handler.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::~ACE_Svc_Handler ( void  )
virtual

Destructor.

Member Function Documentation

template<typename PEER_STREAM , typename SYNCH_TRAITS >
void ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::cleanup_hint ( void **  act_holder = 0)
virtual

When the svc_handle is no longer needed around as a hint, call this method. In addition, reset *act_holder to zero if act_holder != 0.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::close ( u_long  flags = 0)
virtual

Object termination hook – application-specific cleanup code goes here. This function is called by the idle() function if the object does not have a ACE_Connection_Recycling_Strategy associated with it. Also, due to this class's derivation from ACE_Task, close() is also called when a thread activated with this object exits. See ACE_Task::close() for further details. The default action of this function is to call handle_close() with the default arguments.

Reimplemented from ACE_Task_Base.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
void ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::destroy ( void  )
virtual

Call this to free up dynamically allocated <Svc_Handlers> (otherwise you will get memory leaks). In general, you should call this method rather than <delete> since this method knows whether or not the object was allocated dynamically, and can act accordingly (i.e., deleting it if it was allocated dynamically).

template<typename PEER_STREAM , typename SYNCH_TRAITS >
void ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::dump ( void  ) const

Dump the state of an object.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::fini ( void  )
virtual

Default version does no work and returns -1. Must be overloaded by application developer to do anything meaningful.

Reimplemented from ACE_Shared_Object.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
ACE_HANDLE ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::get_handle ( void  ) const
virtual

Get the underlying handle associated with the <peer_>.

Reimplemented from ACE_Event_Handler.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::handle_close ( ACE_HANDLE  = ACE_INVALID_HANDLE,
ACE_Reactor_Mask  = ACE_Event_Handler::ALL_EVENTS_MASK 
)
virtual

Perform termination activities on the SVC_HANDLER. The default behavior is to close down the <peer_> (to avoid descriptor leaks) and to <destroy> this object (to avoid memory leaks)! If you don't want this behavior make sure you override this method...

Reimplemented from ACE_Event_Handler.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::handle_timeout ( const ACE_Time_Value time,
const void *   
)
virtual

Default behavior when timeouts occur is to close down the <Svc_Handler> by calling <handle_close>.

Reimplemented from ACE_Event_Handler.

Reimplemented in ACE_Buffered_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::idle ( u_long  flags = 0)
virtual

Call this method if you want to recycling the Svc_Handler instead of closing it. If the object does not have a recycler, it will be closed.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::info ( ACE_TCHAR **  info_string,
size_t  length 
) const
virtual

Default version does no work and returns -1. Must be overloaded by application developer to do anything meaningful.

Reimplemented from ACE_Shared_Object.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::init ( int  argc,
ACE_TCHAR argv[] 
)
virtual

Default version does no work and returns -1. Must be overloaded by application developer to do anything meaningful.

Reimplemented from ACE_Shared_Object.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::open ( void *  acceptor_or_connector = 0)
virtual

Activate the client handler. This is typically called by the ACE_Acceptor or ACE_Connector, which passes "this" in as the parameter to open. If this method returns -1 the Svc_Handler's close() method is automatically called.

Reimplemented from ACE_Task_Base.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
void ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::operator delete ( void *  obj)

This really should be private so that users are forced to call <destroy>. Unfortunately, the C++ standard doesn't allow there to be a public new and a private delete. It is a bad idea to call this method directly, so use <destroy> instead, unless you know for sure that you've allocated the object dynamically.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
void ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::operator delete ( void *  ,
void *   
)

This operator is necessary to complement the class-specific operator new above. Unfortunately, it's not portable to all C++ compilers...

template<typename PEER_STREAM , typename SYNCH_TRAITS >
void * ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::operator new ( size_t  n)

Overloaded new operator. This method unobtrusively records if a <Svc_Handler> is allocated dynamically, which allows it to clean itself up correctly whether or not it's allocated statically or dynamically.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
void * ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::operator new ( size_t  n,
void *  p 
)

This operator permits "placement new" on a per-object basis.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
PEER_STREAM & ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::peer ( void  ) const

Returns the underlying PEER_STREAM. Used by <ACE_Acceptor::accept> and <ACE_Connector::connect> factories.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::recycle ( void *  = 0)
virtual

Upcall made by the recycler when it is about to recycle the connection. This gives the object a chance to prepare itself for recycling. Return 0 if the object is ready for recycling, -1 on failures.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
ACE_Recyclable_State ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::recycle_state ( void  ) const
virtual

Call this method if you want to get/set the state of the Svc_Handler. If the object does not have a recycler, this call will have no effect (and the accessor will return ACE_RECYCLABLE_UNKNOWN).

template<typename PEER_STREAM , typename SYNCH_TRAITS >
int ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::recycle_state ( ACE_Recyclable_State  new_state)
virtual
template<typename PEER_STREAM , typename SYNCH_TRAITS >
void ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::recycler ( ACE_Connection_Recycling_Strategy recycler,
const void *  recycling_act 
)
virtual

Set the recycler and the recycling_act that is used during purging and caching.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
ACE_Connection_Recycling_Strategy * ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::recycler ( void  ) const
virtual

Get the recycler.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
const void * ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::recycling_act ( void  ) const
virtual

Get the recycling act.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
void ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::set_handle ( ACE_HANDLE  h)
virtual

Set the underlying handle associated with the <peer_>.

Reimplemented from ACE_Event_Handler.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
void ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::shutdown ( void  )

Close down the descriptor and unregister from the Reactor.

Member Data Documentation

template<typename PEER_STREAM , typename SYNCH_TRAITS >
bool ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::closing_
protected

Keeps track of whether we are in the process of closing (required to avoid circular calls to <handle_close>).

template<typename PEER_STREAM , typename SYNCH_TRAITS >
bool ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::dynamic_
protected

Have we been dynamically created?

template<typename PEER_STREAM , typename SYNCH_TRAITS >
PEER_STREAM ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::peer_
protected

Maintain connection with client.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
ACE_Connection_Recycling_Strategy* ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::recycler_
protected

Pointer to the connection recycler.

template<typename PEER_STREAM , typename SYNCH_TRAITS >
const void* ACE_Svc_Handler< PEER_STREAM, SYNCH_TRAITS >::recycling_act_
protected

Asynchronous Completion Token (ACT) to be used to when talking to the recycler.


The documentation for this class was generated from the following files: