SVC_HANDLER
instances), thereby allowing
subsequent re-use of unused, but available, connections.
#include <ace/Cached_Connect_Strategy_T.h>
template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class ATTRIBUTES, class MUTEX> class ACE_Cached_Connect_Strategy_Ex : public ACE_Cached_Connect_Strategy<SVC_HANDLER, ACE_PEER_CONNECTOR_2, MUTEX> {
public:
ACE_Cached_Connect_Strategy_Ex ( CACHING_STRATEGY &caching_s, ACE_Creation_Strategy<SVC_HANDLER> *cre_s = 0, ACE_Concurrency_Strategy<SVC_HANDLER> *con_s = 0, ACE_Recycling_Strategy<SVC_HANDLER> *rec_s = 0, MUTEX *lock = 0, int delete_lock = 0 );
virtual ~ACE_Cached_Connect_Strategy_Ex (void);
virtual int purge_connections (void);
virtual int mark_as_closed_i (const void *recycling_act);
typedef ACE_Refcounted_Hash_Recyclable<ACE_PEER_CONNECTOR_ADDR> REFCOUNTED_HASH_RECYCLABLE_ADDRESS; typedef ACE_Hash_Cache_Map_Manager<REFCOUNTED_HASH_RECYCLABLE_ADDRESS, SVC_HANDLER *, ACE_Hash<REFCOUNTED_HASH_RECYCLABLE_ADDRESS>, ACE_Equal_To<REFCOUNTED_HASH_RECYCLABLE_ADDRESS>, CACHING_STRATEGY, ATTRIBUTES> CONNECTION_CACHE; typedef ACE_TYPENAME CONNECTION_CACHE::CACHE_ENTRY CONNECTION_CACHE_ENTRY;typedef ACE_TYPENAME CONNECTION_CACHE::key_type KEY;
typedef ACE_TYPENAME CONNECTION_CACHE::mapped_type VALUE;
typedef ACE_Recyclable_Handler_Cleanup_Strategy<REFCOUNTED_HASH_RECYCLABLE_ADDRESS, ACE_Pair<SVC_HANDLER *, ATTRIBUTES>, ACE_Hash_Map_Manager_Ex<REFCOUNTED_HASH_RECYCLABLE_ADDRESS, ACE_Pair<SVC_HANDLER *, ATTRIBUTES>, ACE_Hash<REFCOUNTED_HASH_RECYCLABLE_ADDRESS>, ACE_Equal_To<REFCOUNTED_HASH_RECYCLABLE_ADDRESS>, MUTEX> > CLEANUP_STRATEGY; typedef ACE_Cached_Connect_Strategy<SVC_HANDLER, ACE_PEER_CONNECTOR_2, MUTEX> CCSBASE;CACHING_STRATEGY &caching_strategy (void);
protected:
int find ( ACE_Refcounted_Hash_Recyclable<ACE_PEER_CONNECTOR_ADDR> &search_addr, ACE_Hash_Map_Entry<ACE_Refcounted_Hash_Recyclable<ACE_PEER_CONNECTOR_ADDR>, ACE_Pair<SVC_HANDLER *, ATTRIBUTES> > *&entry );
virtual int purge_i (const void *recycling_act);
virtual int cache_i (const void *recycling_act);
virtual int recycle_state_i ( const void *recycling_act, ACE_Recyclable_State new_state );
virtual ACE_Recyclable_State recycle_state_i ( const void *recycling_act ) const;
virtual int cleanup_hint_i ( const void *recycling_act, void **act_holder );
int check_hint_i ( SVC_HANDLER *&sh, 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, ACE_Hash_Map_Entry<ACE_Refcounted_Hash_Recyclable<ACE_PEER_CONNECTOR_ADDR>, ACE_Pair<SVC_HANDLER *, ATTRIBUTES> > *&entry, int &found );
int find_or_create_svc_handler_i ( SVC_HANDLER *&sh, 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, ACE_Hash_Map_Entry<ACE_Refcounted_Hash_Recyclable<ACE_PEER_CONNECTOR_ADDR>, ACE_Pair<SVC_HANDLER *, ATTRIBUTES> > *&entry, int &found );
virtual int connect_svc_handler_i ( SVC_HANDLER *&sh, 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, int &found );
virtual int cached_connect ( SVC_HANDLER *&sh, 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 );
void cleanup (void);
CONNECTION_CACHE connection_cache_;
};
Cached_Connect_Strategy
is intended to be used as a
plug-in connection strategy for ACE_Strategy_Connector
.
It's added value is re-use of established connections and
tweaking the role of the cache as per the caching strategy.
typedef ACE_Refcounted_Hash_Recyclable<ACE_PEER_CONNECTOR_ADDR> REFCOUNTED_HASH_RECYCLABLE_ADDRESS;
typedef ACE_Hash_Cache_Map_Manager<REFCOUNTED_HASH_RECYCLABLE_ADDRESS, SVC_HANDLER *, ACE_Hash<REFCOUNTED_HASH_RECYCLABLE_ADDRESS>, ACE_Equal_To<REFCOUNTED_HASH_RECYCLABLE_ADDRESS>, CACHING_STRATEGY, ATTRIBUTES> CONNECTION_CACHE;
typedef ACE_TYPENAME CONNECTION_CACHE::CACHE_ENTRY CONNECTION_CACHE_ENTRY;
typedef ACE_TYPENAME CONNECTION_CACHE::key_type KEY;
typedef ACE_TYPENAME CONNECTION_CACHE::mapped_type VALUE;
typedef ACE_Recyclable_Handler_Cleanup_Strategy<REFCOUNTED_HASH_RECYCLABLE_ADDRESS, ACE_Pair<SVC_HANDLER *, ATTRIBUTES>, ACE_Hash_Map_Manager_Ex<REFCOUNTED_HASH_RECYCLABLE_ADDRESS, ACE_Pair<SVC_HANDLER *, ATTRIBUTES>, ACE_Hash<REFCOUNTED_HASH_RECYCLABLE_ADDRESS>, ACE_Equal_To<REFCOUNTED_HASH_RECYCLABLE_ADDRESS>, MUTEX> > CLEANUP_STRATEGY;
typedef ACE_Cached_Connect_Strategy<SVC_HANDLER, ACE_PEER_CONNECTOR_2, MUTEX> CCSBASE;
CACHING_STRATEGY &caching_strategy (void);
int check_hint_i (
SVC_HANDLER *&sh,
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,
ACE_Hash_Map_Entry<ACE_Refcounted_Hash_Recyclable<ACE_PEER_CONNECTOR_ADDR>, ACE_Pair<SVC_HANDLER *, ATTRIBUTES> > *&entry,
int &found
);
int find_or_create_svc_handler_i (
SVC_HANDLER *&sh,
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,
ACE_Hash_Map_Entry<ACE_Refcounted_Hash_Recyclable<ACE_PEER_CONNECTOR_ADDR>, ACE_Pair<SVC_HANDLER *, ATTRIBUTES> > *&entry,
int &found
);
virtual int connect_svc_handler_i (
SVC_HANDLER *&sh,
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,
int &found
);
virtual int cached_connect (
SVC_HANDLER *&sh,
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
);
void cleanup (void);
2.8 arent happy with templates, this special
method had to be devised to avoid memory leaks and perform
cleanup of the connection_cache_
.
CONNECTION_CACHE connection_cache_;
SVC_HANDLER
s.
kirthika@cs.wustl.edu