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+// -*- 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 */