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Diffstat (limited to 'trunk/TAO/orbsvcs/orbsvcs/Event/EC_Reactive_SupplierControl.h')
-rw-r--r-- | trunk/TAO/orbsvcs/orbsvcs/Event/EC_Reactive_SupplierControl.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/trunk/TAO/orbsvcs/orbsvcs/Event/EC_Reactive_SupplierControl.h b/trunk/TAO/orbsvcs/orbsvcs/Event/EC_Reactive_SupplierControl.h new file mode 100644 index 00000000000..a2e37e70acf --- /dev/null +++ b/trunk/TAO/orbsvcs/orbsvcs/Event/EC_Reactive_SupplierControl.h @@ -0,0 +1,166 @@ +// -*- C++ -*- + +/** + * @file EC_Reactive_SupplierControl.h + * + * $Id$ + * + * @author Carlos O'Ryan (coryan@cs.wustl.edu) + * + * Based on previous work by Tim Harrison (harrison@cs.wustl.edu) and + * other members of the DOC group. More details can be found in: + * + * http://doc.ece.uci.edu/~coryan/EC/index.html + */ + +#ifndef TAO_EC_REACTIVE_SUPPLIERCONTROL_H +#define TAO_EC_REACTIVE_SUPPLIERCONTROL_H + +#include /**/ "ace/pre.h" + +#include "orbsvcs/Event/EC_SupplierControl.h" + +#include "orbsvcs/ESF/ESF_Worker.h" + +#if !defined (ACE_LACKS_PRAGMA_ONCE) +# pragma once +#endif /* ACE_LACKS_PRAGMA_ONCE */ + +#include "tao/ORB.h" +#include "tao/PolicyC.h" + +#include "ace/Event_Handler.h" + +TAO_BEGIN_VERSIONED_NAMESPACE_DECL + +class TAO_EC_Event_Channel_Base; + +class TAO_EC_Reactive_SupplierControl; + +/** + * @class TAO_EC_SupplierControl_Adapter + * + * @brief Forwards timeout events to the Reactive SupplierControl + * + * The Reactive SupplierControl strategy uses the reactor to + * periodically wakeup and verify the state of the suppliers + * registered with the Event Channel. + * + * @todo Marina Spivak made the following observation: these classes + * and implementation seem nearly identical to those in + * EC_Reactive_ConsumerControl.* The only differences are using + * consumer_admin collection vs supplier_admin, and calling + * disconnect_push_consumer vs disconnect_push_supplier ... Seems + * like it may be a good idea to change some naming and templatize... + * @todo The same templates should be used for the Notification and + * COS Event services. + * + */ +class TAO_RTEvent_Serv_Export TAO_EC_SupplierControl_Adapter : public ACE_Event_Handler +{ +public: + /// Constructor + TAO_EC_SupplierControl_Adapter (TAO_EC_Reactive_SupplierControl *adaptee); + + // = Documented in ACE_Event_Handler. + virtual int handle_timeout (const ACE_Time_Value &tv, + const void *arg = 0); + +private: + /// The adapted object + TAO_EC_Reactive_SupplierControl *adaptee_; +}; + +/** + * @class TAO_EC_Reactive_SupplierControl + * + * @brief SupplierControl + * + * Defines the interface for the supplier control strategy. + * This strategy handles misbehaving or failing suppliers. + */ +class TAO_RTEvent_Serv_Export TAO_EC_Reactive_SupplierControl : public TAO_EC_SupplierControl +{ +public: + /// Constructor. It does not assume ownership of the @a event_channel + /// parameter. + TAO_EC_Reactive_SupplierControl (const ACE_Time_Value &rate, + const ACE_Time_Value &timeout, + TAO_EC_Event_Channel_Base *event_channel, + CORBA::ORB_ptr orb); + + /// Destructor. + virtual ~TAO_EC_Reactive_SupplierControl (void); + + /// Receive the timeout from the adapter + void handle_timeout (const ACE_Time_Value &tv, + const void* arg); + + // = Documented in TAO_EC_SupplierControl + virtual int activate (void); + virtual int shutdown (void); + virtual void supplier_not_exist (TAO_EC_ProxyPushConsumer *proxy + ACE_ENV_ARG_DECL_NOT_USED); + virtual void system_exception (TAO_EC_ProxyPushConsumer *proxy, + CORBA::SystemException & + ACE_ENV_ARG_DECL_NOT_USED); + +private: + /// Check if the suppliers still exists. It is a helper method for + /// handle_timeout() to isolate the exceptions. + void query_suppliers (ACE_ENV_SINGLE_ARG_DECL); + +private: + /// The polling rate + ACE_Time_Value rate_; + + /// The polling timeout + ACE_Time_Value timeout_; + + /// The Adapter for the reactor events + TAO_EC_SupplierControl_Adapter adapter_; + + /// The event channel + TAO_EC_Event_Channel_Base *event_channel_; + + /// The ORB + CORBA::ORB_var orb_; + + /// To control the timeout policy in the thread + CORBA::PolicyCurrent_var policy_current_; + + /// Precomputed policy list to the set timeout. + CORBA::PolicyList policy_list_; + + /// The ORB reactor + ACE_Reactor *reactor_; + +#if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0 + /// The timer id + long timer_id_; +#endif /* TAO_HAS_CORBA_MESSAGING */ +}; + +// **************************************************************** + +class TAO_EC_Ping_Supplier : public TAO_ESF_Worker<TAO_EC_ProxyPushConsumer> +{ +public: + TAO_EC_Ping_Supplier (TAO_EC_SupplierControl *control); + + virtual void work (TAO_EC_ProxyPushConsumer *consumer + ACE_ENV_ARG_DECL); + +private: + TAO_EC_SupplierControl *control_; +}; + +TAO_END_VERSIONED_NAMESPACE_DECL + +#if defined (__ACE_INLINE__) +#include "orbsvcs/Event/EC_Reactive_SupplierControl.inl" +#endif /* __ACE_INLINE__ */ + +#include /**/ "ace/post.h" + +#endif /* TAO_EC_SUPPLIERCONTROL_H */ |