ACE_Connector< SVC_HANDLER, > Class Template Reference

Generic factory for actively connecting clients and creating service handlers (SVC_HANDLERs). More...

#include <Connector.h>

Inheritance diagram for ACE_Connector< SVC_HANDLER, >:

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Collaboration diagram for ACE_Connector< SVC_HANDLER, >:

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List of all members.

Public Types

typedef SVC_HANDLER::addr_type addr_type
typedef ACE_PEER_CONNECTOR connector_type
typedef SVC_HANDLER handler_type
typedef SVC_HANDLER::stream_type stream_type
typedef
ACE_PEER_CONNECTOR::PEER_ADDR 
peer_addr_type
typedef ACE_PEER_CONNECTOR_ADDR ACE_PEER_ADDR_TYPEDEF

Public Member Functions

 ACE_Connector (ACE_Reactor *r=ACE_Reactor::instance(), int flags=0)
virtual int open (ACE_Reactor *r=ACE_Reactor::instance(), int flags=0)
virtual ~ACE_Connector (void)
 Shutdown a connector and release resources.
virtual int connect (SVC_HANDLER *&svc_handler, const ACE_PEER_CONNECTOR_ADDR &remote_addr, const ACE_Synch_Options &synch_options=ACE_Synch_Options::defaults, const ACE_PEER_CONNECTOR_ADDR &local_addr=(peer_addr_type &) ACE_PEER_CONNECTOR_ADDR_ANY, int reuse_addr=0, int flags=O_RDWR, int perms=0)
virtual int connect (SVC_HANDLER *&svc_handler_hint, SVC_HANDLER *&svc_handler, const ACE_PEER_CONNECTOR_ADDR &remote_addr, const ACE_Synch_Options &synch_options=ACE_Synch_Options::defaults, const ACE_PEER_CONNECTOR_ADDR &local_addr=(peer_addr_type &) ACE_PEER_CONNECTOR_ADDR_ANY, int reuse_addr=0, int flags=O_RDWR, int perms=0)
virtual int connect_n (size_t n, SVC_HANDLER *svc_handlers[], ACE_PEER_CONNECTOR_ADDR remote_addrs[], ACE_TCHAR *failed_svc_handlers=0, const ACE_Synch_Options &synch_options=ACE_Synch_Options::defaults)
virtual int cancel (SVC_HANDLER *svc_handler)
virtual int close (void)
virtual ACE_PEER_CONNECTOR & connector (void) const
 Return the underlying PEER_CONNECTOR object.
virtual void initialize_svc_handler (ACE_HANDLE handle, SVC_HANDLER *svc_handler)
 Initialize Svc_Handler.
virtual void reactor (ACE_Reactor *reactor)
 Set Reactor.
virtual ACE_Reactorreactor (void) const
 Get Reactor.
void dump (void) const
 Dump the state of an object.

Public Attributes

 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks.

Protected Types

typedef
ACE_NonBlocking_Connect_Handler
< SVC_HANDLER > 
NBCH

Protected Member Functions

virtual int make_svc_handler (SVC_HANDLER *&sh)
virtual int connect_svc_handler (SVC_HANDLER *&svc_handler, const ACE_PEER_CONNECTOR_ADDR &remote_addr, ACE_Time_Value *timeout, const ACE_PEER_CONNECTOR_ADDR &local_addr, int reuse_addr, int flags, int perms)
virtual int connect_svc_handler (SVC_HANDLER *&svc_handler, SVC_HANDLER *&sh_copy, const ACE_PEER_CONNECTOR_ADDR &remote_addr, ACE_Time_Value *timeout, const ACE_PEER_CONNECTOR_ADDR &local_addr, int reuse_addr, int flags, int perms)
virtual int activate_svc_handler (SVC_HANDLER *svc_handler)
int nonblocking_connect (SVC_HANDLER *, const ACE_Synch_Options &)
 Creates and registers ACE_NonBlocking_Connect_Handler.
virtual int connect_i (SVC_HANDLER *&svc_handler, SVC_HANDLER **sh_copy, const ACE_PEER_CONNECTOR_ADDR &remote_addr, const ACE_Synch_Options &synch_options, const ACE_PEER_CONNECTOR_ADDR &local_addr, int reuse_addr, int flags, int perms)
 Implementation of the connect methods.
ACE_Unbounded_Set< ACE_HANDLE > & non_blocking_handles (void)
virtual int init (int argc, ACE_TCHAR *argv[])
virtual int fini (void)
 Calls handle_close() to shutdown the Connector gracefully.
virtual int info (ACE_TCHAR **strp, size_t length) const
 Default version returns address info in buf.
virtual int suspend (void)
virtual int resume (void)

Private Attributes

ACE_PEER_CONNECTOR connector_
 This is the peer connector factory.
int flags_
ACE_Reactorreactor_
 Pointer to the Reactor.
ACE_Unbounded_Set< ACE_HANDLE > non_blocking_handles_
 Handle set representing the non-blocking connects in progress.


Detailed Description

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1>
class ACE_Connector< SVC_HANDLER, >

Generic factory for actively connecting clients and creating service handlers (SVC_HANDLERs).

Implements the strategy for actively establishing connections with clients. An ACE_Connector is parameterized by concrete types that conform to the interfaces of PEER_CONNECTOR and SVC_HANDLER. The PEER_CONNECTOR is instantiated with a transport mechanism that actively establishes connections. The SVC_HANDLER is instantiated with a concrete type that performs the application-specific service. Both blocking and non-blocking connects are supported. Further, non-blocking connects support timeouts.


Member Typedef Documentation

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
typedef SVC_HANDLER::addr_type ACE_Connector< SVC_HANDLER, >::addr_type

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
typedef ACE_PEER_CONNECTOR ACE_Connector< SVC_HANDLER, >::connector_type

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
typedef SVC_HANDLER ACE_Connector< SVC_HANDLER, >::handler_type

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
typedef SVC_HANDLER::stream_type ACE_Connector< SVC_HANDLER, >::stream_type

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
typedef ACE_PEER_CONNECTOR::PEER_ADDR ACE_Connector< SVC_HANDLER, >::peer_addr_type

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
typedef ACE_PEER_CONNECTOR_ADDR ACE_Connector< SVC_HANDLER, >::ACE_PEER_ADDR_TYPEDEF

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
typedef ACE_NonBlocking_Connect_Handler<SVC_HANDLER> ACE_Connector< SVC_HANDLER, >::NBCH [protected]


Constructor & Destructor Documentation

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
ACE_Connector< SVC_HANDLER, >::ACE_Connector ( ACE_Reactor r = ACE_Reactor::instance(),
int  flags = 0 
)

Initialize a connector. flags indicates how SVC_HANDLER's should be initialized prior to being activated. Right now, the only flag that is processed is ACE_NONBLOCK, which enabled non-blocking I/O on the SVC_HANDLER when it is opened.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual ACE_Connector< SVC_HANDLER, >::~ACE_Connector ( void   )  [virtual]

Shutdown a connector and release resources.


Member Function Documentation

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::open ( ACE_Reactor r = ACE_Reactor::instance(),
int  flags = 0 
) [virtual]

Initialize a connector. flags indicates how SVC_HANDLER's should be initialized prior to being activated. Right now, the only flag that is processed is ACE_NONBLOCK, which enabled non-blocking I/O on the SVC_HANDLER when it is opened.

Reimplemented in ACE_Strategy_Connector< SVC_HANDLER, >.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::connect ( SVC_HANDLER *&  svc_handler,
const ACE_PEER_CONNECTOR_ADDR &  remote_addr,
const ACE_Synch_Options synch_options = ACE_Synch_Options::defaults,
const ACE_PEER_CONNECTOR_ADDR &  local_addr = (peer_addr_type &) ACE_PEER_CONNECTOR_ADDR_ANY,
int  reuse_addr = 0,
int  flags = O_RDWR,
int  perms = 0 
) [virtual]

Initiate connection of svc_handler to peer at remote_addr using synch_options. If the caller wants to designate the selected local_addr they can (and can also insist that the local_addr be reused by passing a value reuse_addr == 1). flags and perms can be used to pass any flags that are needed to perform specific operations such as opening a file within connect with certain permissions. If the connection fails the <close> hook on the <svc_handler> will be called automatically to prevent resource leaks.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::connect ( SVC_HANDLER *&  svc_handler_hint,
SVC_HANDLER *&  svc_handler,
const ACE_PEER_CONNECTOR_ADDR &  remote_addr,
const ACE_Synch_Options synch_options = ACE_Synch_Options::defaults,
const ACE_PEER_CONNECTOR_ADDR &  local_addr = (peer_addr_type &) ACE_PEER_CONNECTOR_ADDR_ANY,
int  reuse_addr = 0,
int  flags = O_RDWR,
int  perms = 0 
) [virtual]

This is a variation on the previous <connect> method. On cached connectors the svc_handler_hint variable can be used as a hint for future lookups. Since this variable is modified in the context of the internal cache its use is thread-safe. But the actual svc_handler for the current connection is returned in the second parameter svc_handler. If the connection fails the <close> hook on the <svc_handler> will be called automatically to prevent resource leaks.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::connect_n ( size_t  n,
SVC_HANDLER *  svc_handlers[],
ACE_PEER_CONNECTOR_ADDR  remote_addrs[],
ACE_TCHAR failed_svc_handlers = 0,
const ACE_Synch_Options synch_options = ACE_Synch_Options::defaults 
) [virtual]

Initiate connection of n svc_handlers to peers at remote_addrs using synch_options. Returns -1 if failure occurs and 0 otherwise. If failed_svc_handlers is non-NULL, a 1 is placed in the corresponding index of failed_svc_handlers for each <svc_handlers[i]> that failed to connect, else a 0 is placed in that index.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::cancel ( SVC_HANDLER *  svc_handler  )  [virtual]

Cancel the svc_handler that was started asynchronously. Note that this is the only case when the Connector does not actively close the svc_handler. It is left up to the caller of <cancel> to decide the fate of the svc_handler.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::close ( void   )  [virtual]

Close down the Connector. All pending non-blocking connects are canceled and the corresponding svc_handler is closed.

Reimplemented in ACE_Strategy_Connector< SVC_HANDLER, >.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual ACE_PEER_CONNECTOR& ACE_Connector< SVC_HANDLER, >::connector ( void   )  const [virtual]

Return the underlying PEER_CONNECTOR object.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual void ACE_Connector< SVC_HANDLER, >::initialize_svc_handler ( ACE_HANDLE  handle,
SVC_HANDLER *  svc_handler 
) [virtual]

Initialize Svc_Handler.

Implements ACE_Connector_Base< SVC_HANDLER >.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual void ACE_Connector< SVC_HANDLER, >::reactor ( ACE_Reactor reactor  )  [virtual]

Set Reactor.

Reimplemented from ACE_Event_Handler.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual ACE_Reactor* ACE_Connector< SVC_HANDLER, >::reactor ( void   )  const [virtual]

Get Reactor.

Reimplemented from ACE_Event_Handler.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
void ACE_Connector< SVC_HANDLER, >::dump ( void   )  const

Dump the state of an object.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::make_svc_handler ( SVC_HANDLER *&  sh  )  [protected, virtual]

Bridge method for creating a SVC_HANDLER. The default is to create a new SVC_HANDLER only if sh == 0, else sh is unchanged. However, subclasses can override this policy to perform SVC_HANDLER creation in any way that they like (such as creating subclass instances of SVC_HANDLER, using a singleton, dynamically linking the handler, etc.). Returns -1 if failure, else 0.

Reimplemented in ACE_Strategy_Connector< SVC_HANDLER, >.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::connect_svc_handler ( SVC_HANDLER *&  svc_handler,
const ACE_PEER_CONNECTOR_ADDR &  remote_addr,
ACE_Time_Value timeout,
const ACE_PEER_CONNECTOR_ADDR &  local_addr,
int  reuse_addr,
int  flags,
int  perms 
) [protected, virtual]

Bridge method for connecting the svc_handler to the remote_addr. The default behavior delegates to the <PEER_CONNECTOR::connect>.

Reimplemented in ACE_Strategy_Connector< SVC_HANDLER, >.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::connect_svc_handler ( SVC_HANDLER *&  svc_handler,
SVC_HANDLER *&  sh_copy,
const ACE_PEER_CONNECTOR_ADDR &  remote_addr,
ACE_Time_Value timeout,
const ACE_PEER_CONNECTOR_ADDR &  local_addr,
int  reuse_addr,
int  flags,
int  perms 
) [protected, virtual]

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::activate_svc_handler ( SVC_HANDLER *  svc_handler  )  [protected, virtual]

Bridge method for activating a svc_handler with the appropriate concurrency strategy. The default behavior of this method is to activate the SVC_HANDLER by calling its <open> method (which allows the SVC_HANDLER to define its own concurrency strategy). However, subclasses can override this strategy to do more sophisticated concurrency activations (such as creating the SVC_HANDLER as an "active object" via multi-threading or multi-processing).

Reimplemented in ACE_Strategy_Connector< SVC_HANDLER, >.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
int ACE_Connector< SVC_HANDLER, >::nonblocking_connect ( SVC_HANDLER *  ,
const ACE_Synch_Options  
) [protected]

Creates and registers ACE_NonBlocking_Connect_Handler.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::connect_i ( SVC_HANDLER *&  svc_handler,
SVC_HANDLER **  sh_copy,
const ACE_PEER_CONNECTOR_ADDR &  remote_addr,
const ACE_Synch_Options synch_options,
const ACE_PEER_CONNECTOR_ADDR &  local_addr,
int  reuse_addr,
int  flags,
int  perms 
) [protected, virtual]

Implementation of the connect methods.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
ACE_Unbounded_Set<ACE_HANDLE>& ACE_Connector< SVC_HANDLER, >::non_blocking_handles ( void   )  [protected, virtual]

Return the handle set representing the non-blocking connects in progress.

Implements ACE_Connector_Base< SVC_HANDLER >.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::init ( int  argc,
ACE_TCHAR argv[] 
) [protected, 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<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::fini ( void   )  [protected, virtual]

Calls handle_close() to shutdown the Connector gracefully.

Reimplemented from ACE_Shared_Object.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::info ( ACE_TCHAR **  strp,
size_t  length 
) const [protected, virtual]

Default version returns address info in buf.

Reimplemented from ACE_Shared_Object.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::suspend ( void   )  [protected, virtual]

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

Reimplemented from ACE_Service_Object.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
virtual int ACE_Connector< SVC_HANDLER, >::resume ( void   )  [protected, virtual]

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

Reimplemented from ACE_Service_Object.


Member Data Documentation

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
ACE_Connector< SVC_HANDLER, >::ACE_ALLOC_HOOK_DECLARE

Declare the dynamic allocation hooks.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
ACE_PEER_CONNECTOR ACE_Connector< SVC_HANDLER, >::connector_ [private]

This is the peer connector factory.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
int ACE_Connector< SVC_HANDLER, >::flags_ [private]

Flags that indicate how SVC_HANDLER's should be initialized prior to being activated. Right now, the only flag that is processed is ACE_NONBLOCK, which enabled non-blocking I/O on the SVC_HANDLER when it is opened.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
ACE_Reactor* ACE_Connector< SVC_HANDLER, >::reactor_ [private]

Pointer to the Reactor.

Reimplemented from ACE_Event_Handler.

template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1 >
ACE_Unbounded_Set<ACE_HANDLE> ACE_Connector< SVC_HANDLER, >::non_blocking_handles_ [private]

Handle set representing the non-blocking connects in progress.


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

Generated on Wed Apr 23 02:38:43 2008 for ACE by  doxygen 1.5.5