diff options
Diffstat (limited to 'examples/Web_Crawler/Cached_Connect_Strategy_T.cpp')
| -rw-r--r-- | examples/Web_Crawler/Cached_Connect_Strategy_T.cpp | 643 |
1 files changed, 0 insertions, 643 deletions
diff --git a/examples/Web_Crawler/Cached_Connect_Strategy_T.cpp b/examples/Web_Crawler/Cached_Connect_Strategy_T.cpp deleted file mode 100644 index bdb7047736e..00000000000 --- a/examples/Web_Crawler/Cached_Connect_Strategy_T.cpp +++ /dev/null @@ -1,643 +0,0 @@ -//$Id: - -#ifndef CACHED_CONNECT_STRATEGY_T_C -#define CACHED_CONNECT_STRATEGY_T_C - -#if !defined (ACE_LACKS_PRAGMA_ONCE) -#define ACE_LACKS_PRAGMA_ONCE -#endif /* ACE_LACKS_PRAGMA_ONCE */ - -#include "ace/ACE.h" -#include "Cached_Connect_Strategy_T.h" -#include "ace/Service_Repository.h" -#include "ace/Synch.h" -#include "ace/Service_Types.h" -#include "ace/Thread_Manager.h" -#include "ace/WFMO_Reactor.h" -#include "ace/Pair_T.h" -#include "Options.h" - -#if defined (ACE_LACKS_INLINE_FUNCTIONS) -#include "Cached_Connect_Strategy_T.i" -#endif /* ACE_LACKS_INLINE_FUNCTIONS */ - -ACE_RCSID(Web_Crawler, Cached_Connect_Strategy_T, "$Id$") - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::ACE_Cached_Connect_Strategy_Ex - (ACE_Creation_Strategy<SVC_HANDLER> *cre_s, - ACE_Concurrency_Strategy<SVC_HANDLER> *con_s, - ACE_Recycling_Strategy<SVC_HANDLER> *rec_s) - : creation_strategy_ (0), - delete_creation_strategy_ (0), - concurrency_strategy_ (0), - delete_concurrency_strategy_ (0), - recycling_strategy_ (0), - delete_recycling_strategy_ (0) -{ - - ACE_DEBUG ((LM_DEBUG, "ACE_Cached_Connect_Strategy_Ex::ACE_Cached_Connect_Strategy_Ex\n")); - - if (this->open (cre_s, con_s, rec_s) == -1) - ACE_ERROR ((LM_ERROR, - ASYS_TEXT ("%p\n"), - ASYS_TEXT ("ACE_Cached_Connect_Strategy_Ex::ACE_Cached_Connect_Strategy_Ex"))); -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::~ACE_Cached_Connect_Strategy_Ex (void) -{ - ACE_DEBUG ((LM_DEBUG, "ACE_Cached_Connect_Strategy_Ex::~ACE_Cached_Connect_Strategy_Ex\n")); - if (this->delete_creation_strategy_) - delete this->creation_strategy_; - this->delete_creation_strategy_ = 0; - this->creation_strategy_ = 0; - - if (this->delete_concurrency_strategy_) - delete this->concurrency_strategy_; - this->delete_concurrency_strategy_ = 0; - this->concurrency_strategy_ = 0; - - if (this->delete_recycling_strategy_) - delete this->recycling_strategy_; - this->delete_recycling_strategy_ = 0; - this->recycling_strategy_ = 0; - - // Close down all cached service handlers. - for (CONNECTION_CACHE_ITERATOR iter = this->connection_cache_.begin (); - iter != this->connection_cache_.end (); - ++iter) - { - if ((*iter).second () != 0) - { - (*iter).second ()->recycler (0, 0); - (*iter).second ()->close (); - } - } -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::open - (ACE_Creation_Strategy<SVC_HANDLER> *cre_s, - ACE_Concurrency_Strategy<SVC_HANDLER> *con_s, - ACE_Recycling_Strategy<SVC_HANDLER> *rec_s) -{ - // Initialize the creation strategy. - // First we decide if we need to clean up. - if (this->creation_strategy_ != 0 && - this->delete_creation_strategy_ != 0 && - cre_s != 0) - { - delete this->creation_strategy_; - this->creation_strategy_ = 0; - this->delete_creation_strategy_ = 0; - } - - if (cre_s != 0) - this->creation_strategy_ = cre_s; - else if (this->creation_strategy_ == 0) - { - ACE_NEW_RETURN (this->creation_strategy_, - CREATION_STRATEGY, -1); - this->delete_creation_strategy_ = 1; - } - - // Initialize the concurrency strategy. - - if (this->concurrency_strategy_ != 0 && - this->delete_concurrency_strategy_ != 0 && - con_s != 0) - { - delete this->concurrency_strategy_; - this->concurrency_strategy_ = 0; - this->delete_concurrency_strategy_ = 0; - } - - if (con_s != 0) - this->concurrency_strategy_ = con_s; - else if (this->concurrency_strategy_ == 0) - { - ACE_NEW_RETURN (this->concurrency_strategy_, - CONCURRENCY_STRATEGY, -1); - this->delete_concurrency_strategy_ = 1; - } - - // Initialize the recycling strategy. - - if (this->recycling_strategy_ != 0 && - this->delete_recycling_strategy_ != 0 && - rec_s != 0) - { - delete this->recycling_strategy_; - this->recycling_strategy_ = 0; - this->delete_recycling_strategy_ = 0; - } - - if (rec_s != 0) - this->recycling_strategy_ = rec_s; - else if (this->recycling_strategy_ == 0) - { - ACE_NEW_RETURN (this->recycling_strategy_, - RECYCLING_STRATEGY, -1); - this->delete_recycling_strategy_ = 1; - } - - return 0; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::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_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::CONNECTION_CACHE_ENTRY *&entry, - int &found) -{ - ACE_UNUSED_ARG (remote_addr); - ACE_UNUSED_ARG (timeout); - ACE_UNUSED_ARG (local_addr); - ACE_UNUSED_ARG (reuse_addr); - ACE_UNUSED_ARG (flags); - ACE_UNUSED_ARG (perms); - - found = 0; - - // Get the recycling act for the svc_handler - CONNECTION_CACHE_ENTRY *possible_entry = (CONNECTION_CACHE_ENTRY *) sh->recycling_act (); - - // Check to see if the hint svc_handler has been closed down - if (possible_entry->ext_id_.state () == ACE_Recyclable::CLOSED) - { - // If close, decrement refcount - if (possible_entry->ext_id_.decrement () == 0) - { - // If refcount goes to zero, close down the svc_handler - possible_entry->int_id_.first ()->recycler (0, 0); - possible_entry->int_id_.first ()->close (); - this->purge_i (possible_entry); - } - - // Hint not successful - found = 0; - - // Reset hint - sh = 0; - } - - // If hint is not closed, see if it is connected to the correct - // address and is recyclable - else if (possible_entry->ext_id_ == remote_addr) - { - // Hint successful - found = 1; - - // Tell the <svc_handler> that it should prepare itself for - // being recycled. - this->prepare_for_recycling (sh); - } - else - { - // This hint will not be used. - possible_entry->ext_id_.decrement (); - - // Hint not successful - found = 0; - - // If <sh> is not connected to the correct address or is busy, - // we will not use it. - sh = 0; - } - - if (found) - entry = possible_entry; - - return 0; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::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_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::CONNECTION_CACHE_ENTRY *&entry, - int &found) -{ - - ACE::set_handle_limit (OPTIONS::instance ()->handle_limit ()); - //ACE_DEBUG ((LM_DEBUG, "MAX handles %d \n", ACE::max_handles ())); - // Explicit type conversion - REFCOUNTED_HASH_RECYCLABLE_ADDRESS search_addr (remote_addr); - - // Try to find the address in the cache. Only if we don't find it - // do we create a new <SVC_HANDLER> and connect it with the server. - if (this->connection_cache_.find (search_addr, entry) == -1) - { - // Set the flag - found = 0; - - // Create a new svc_handler - if (this->make_svc_handler (sh) == -1) - return -1; - - if (this->connect (...) == -1) - { - return -1; - } - else - { - // Insert the new SVC_HANDLER instance into the cache. - if (this->connection_cache_.bind (search_addr, - sh, - entry) == -1) - return -1; - - // Set the recycler and the recycling act - this->assign_recycler (sh, this, entry); - } - } - else // We found a cached svc_handler. - { - // Set the flag - found = 1; - - // Get the cached <svc_handler> - sh = entry->int_id_.first (); - - // Tell the <svc_handler> that it should prepare itself for - // being recycled. - this->prepare_for_recycling (sh); - } - - return 0; - -} - -connect () -{ - // Actively establish the connection. This is a timed blocking - // connect. - if (this->CONNECT_STRATEGY::connect_svc_handler (sh, - remote_addr, - timeout, - local_addr, - reuse_addr, - flags, - perms) == -1) - { - // If connect() failed because of timeouts, we have to reject - // the connection entirely. This is necessary since currently - // there is no way for the non-blocking connects to complete and - // for the <Connector> to notify the cache of the completion of - // connect(). - if (errno == EWOULDBLOCK) - errno = ENOTSUP; - else if (errno == EMFILE) - { - // @@purge here... - - // Try connecting again. - if (this->CONNECT_STRATEGY::connect_svc_handler (sh, - remote_addr, - timeout, - local_addr, - reuse_addr, - flags, - perms) == -1) - { - if (errno == EWOULDBLOCK) - errno = ENOTSUP; - return -1; - } - } - else - { - return -1; - } - } - else - { - return 0; - } -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::connect_svc_handler - (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_DEBUG ((LM_DEBUG, "ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::connect_svc_handler\n")); - int found = 0; - - // This artificial scope is required since we need to let go of the - // lock *before* registering the newly created handler with the - // Reactor. - { - // Synchronization is required here as the setting of the - // recyclable state must be done atomically with the finding and - // binding of the service handler in the cache. - ACE_GUARD_RETURN (MUTEX, ace_mon, this->lock_, -1); - - int result = this->connect_svc_handler_i (sh, - remote_addr, - timeout, - local_addr, - reuse_addr, - flags, - perms, - found); - if (result != 0) - return result; - - } - - // If it is a new connection, activate it. - // - // Note: This activation is outside the scope of the lock of the - // cached connector. This is necessary to avoid subtle deadlock - // conditions with this lock and the Reactor lock. - // - // @@ If an error occurs on activation, we should try to remove this - // entry from the internal table. - - if (!found) - if (this->activate_svc_handler (sh)) - return -1; - - return 0; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::connect_svc_handler - (SVC_HANDLER *&sh, - 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) -{ - int found = 0; - - // This artificial scope is required since we need to let go of the - // lock *before* registering the newly created handler with the - // Reactor. - { - // Synchronization is required here as the setting of the - // recyclable state must be done atomically with the finding and - // binding of the service handler in the cache. - ACE_GUARD_RETURN (MUTEX, ace_mon, this->lock_, -1); - - int result = this->connect_svc_handler_i (sh, - remote_addr, - timeout, - local_addr, - reuse_addr, - flags, - perms, - found); - sh_copy = sh; - - ACE_DEBUG ((LM_DEBUG,"after connect_svc_handler_i ACE_Cached_Connect_Strategy_Ex::connect_svc_handler sh_Copy result =%d\n", result)); - if (result != 0) - return result; - - } - - // If it is a new connection, activate it. - // - // Note: This activation is outside the scope of the lock of the - // cached connector. This is necessary to avoid subtle deadlock - // conditions with this lock and the Reactor lock. - // - // @@ If an error occurs on activation, we should try to remove this - // entry from the internal table. - - if (!found) - if (this->activate_svc_handler (sh)) - return -1; - - return 0; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::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) -{ - CONNECTION_CACHE_ENTRY *entry = 0; - - // Check if the user passed a hint svc_handler - if (sh != 0) - { - - int result = this->check_hint_i (sh, - remote_addr, - timeout, - local_addr, - reuse_addr, - flags, - perms, - entry, - found); - // @@ Remove debugging - ACE_DEBUG ((LM_DEBUG, "ACE_Cached_Connect_Strategy_Ex::connect_svc_handler_i CHECK_HINT_I result = %d\n", result)); - - if (result != 0) - return result; - } - - // If not found - if (!found) - { - int result = this->find_or_create_svc_handler_i (sh, - remote_addr, - timeout, - local_addr, - reuse_addr, - flags, - perms, - entry, - found); - - // @@ Purging here is not correct... - - if (result != 0) - { - // If the connect failed due to the process running out of - // file descriptors then, auto_purging of some connections - // are done from the CONNECTION_CACHE. This frees the - // descriptors which get used in the connect process and - // hence the same method is called again! - if (errno == EMFILE) - { - int result = this->connection_cache_.purge (); - if (result == -1) - return result; - - if (this->find_or_create_svc_handler_i (sh, - remote_addr, - timeout, - local_addr, - reuse_addr, - flags, - perms, - entry, - found) == -1) - return -1; - } - else - return result; - } - } - - // For all successful cases: mark the <svc_handler> in the cache - // as being <in_use>. Therefore recyclable is BUSY. - entry->ext_id_.state (ACE_Recyclable::BUSY); - - // And increment the refcount - entry->ext_id_.increment (); - - return 0; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::cache (const void *recycling_act) -{ - // Synchronization is required here as the setting of the recyclable - // state must be done atomically with respect to other threads that - // are querying the cache. - ACE_GUARD_RETURN (MUTEX, ace_mon, this->lock_, -1); - - ACE_DEBUG ((LM_DEBUG, "ACE_Cached_Connect_Strategy_Ex::cache\n")); - return this->cache_i (recycling_act); -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::cache_i (const void *recycling_act) -{ - // The wonders and perils of ACT - CONNECTION_CACHE_ENTRY *entry = (CONNECTION_CACHE_ENTRY *) recycling_act; - - // Mark the <svc_handler> in the cache as not being <in_use>. - // Therefore recyclable is IDLE. - - entry->ext_id_.state (ACE_Recyclable::IDLE); - - return 0; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::purge (const void *recycling_act) -{ - // Excluded other threads from changing cache while we take this - // entry out. - ACE_GUARD_RETURN (MUTEX, ace_mon, this->lock_, -1); - - return this->purge_i (recycling_act); -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::purge_i (const void *recycling_act) -{ - // The wonders and perils of ACT - CONNECTION_CACHE_ENTRY *entry = (CONNECTION_CACHE_ENTRY *) recycling_act; - - return this->connection_cache_.unbind (entry); -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::mark_as_closed (const void *recycling_act) -{ - // Excluded other threads from changing cache while we take this - // entry out. - ACE_GUARD_RETURN (MUTEX, ace_mon, this->lock_, -1); - - return this->mark_as_closed_i (recycling_act); -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::mark_as_closed_i (const void *recycling_act) -{ - // The wonders and perils of ACT - CONNECTION_CACHE_ENTRY *entry = (CONNECTION_CACHE_ENTRY *) recycling_act; - - // Mark the <svc_handler> in the cache as CLOSED. - entry->ext_id_.state (ACE_Recyclable::CLOSED); - - return 0; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::cleanup_hint (const void *recycling_act) -{ - // Excluded other threads from changing cache while we take this - // entry out. - ACE_GUARD_RETURN (MUTEX, ace_mon, this->lock_, -1); - - return this->cleanup_hint_i (recycling_act); -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> int -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::cleanup_hint_i (const void *recycling_act) -{ - // The wonders and perils of ACT - CONNECTION_CACHE_ENTRY *entry = (CONNECTION_CACHE_ENTRY *) recycling_act; - - // Decrement the refcount on the <svc_handler>. - int refcount = entry->ext_id_.decrement (); - - // If the svc_handler state is closed and the refcount == 0, call - // close() on svc_handler. - if (entry->ext_id_.state () == ACE_Recyclable::CLOSED && - refcount == 0) - { - entry->int_id_.first ()->recycler (0, 0); - entry->int_id_.first ()->close (); - this->purge_i (entry); - } - - return 0; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> ACE_Creation_Strategy<SVC_HANDLER> * -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::creation_strategy (void) const -{ - return this->creation_strategy_; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> ACE_Recycling_Strategy<SVC_HANDLER> * -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::recycling_strategy (void) const -{ - return this->recycling_strategy_; -} - -template<class SVC_HANDLER, ACE_PEER_CONNECTOR_1, class CACHING_STRATEGY, class MUTEX> ACE_Concurrency_Strategy<SVC_HANDLER> * -ACE_Cached_Connect_Strategy_Ex<SVC_HANDLER, ACE_PEER_CONNECTOR_2, CACHING_STRATEGY, MUTEX>::concurrency_strategy (void) const -{ - return this->concurrency_strategy_; -} - -ACE_ALLOC_HOOK_DEFINE(ACE_Cached_Connect_Strategy_Ex) - -#endif /* CACHED_CONNECT_STRATEGY_T_C */ |