1 files changed, 74 insertions, 0 deletions
diff --git a/TAO/orbsvcs/orbsvcs/LoadBalancing/LB_Balancing_Strategy.h b/TAO/orbsvcs/orbsvcs/LoadBalancing/LB_Balancing_Strategy.h
new file mode 100644
index 00000000000..a78ad47aebc
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+++ b/TAO/orbsvcs/orbsvcs/LoadBalancing/LB_Balancing_Strategy.h
@@ -0,0 +1,74 @@
+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file LoadBalancing_Strategy.h
+ *
+ *  $Id$
+ *
+ *  @author Ossama Othman <ossama@uci.edu>
+ */
+//=============================================================================
+
+
+#ifndef TAO_LB_BALANCING_STRATEGY_H
+#define TAO_LB_BALANCING_STRATEGY_H
+
+#include "ace/pre.h"
+
+#include "orbsvcs/LoadBalancingS.h"
+#include "LoadBalancing_export.h"
+
+# if !defined (ACE_LACKS_PRAGMA_ONCE)
+#   pragma once
+# endif /* ACE_LACKS_PRAGMA_ONCE */
+
+class TAO_LB_ReplicaProxy;
+
+
+/**
+ * @class TAO_LB_Balancing_Strategy
+ *
+ * @brief Load balancing strategy abstract base class.
+ *
+ * This abstract base class defines the interface load balancing
+ * strategies should implement.
+ */
+class TAO_LoadBalancing_Export TAO_LB_Balancing_Strategy
+{
+public:
+
+  /// Destructor
+  virtual ~TAO_LB_Balancing_Strategy (void);
+
+  // @@ The name of the method should be more meaningful, what about:
+  //    select_replica(), select_unloaded_replica() or something like
+  //    that?
+  /// Return the object reference to the Replica to which requests should
+  /// be redirected.
+  virtual CORBA::Object_ptr replica (CORBA::Environment &ACE_TRY_ENV)
+    ACE_THROW_SPEC ((CORBA::SystemException)) = 0;
+
+  /// Insert ReplicaProxy servant into the set of replica proxies upon
+  /// which the load balancing algorithm is performed.
+  virtual int insert (TAO_LB_ReplicaProxy *) = 0;
+
+  /// Remove ReplicaProxy servant from the set of replica proxies.
+  virtual int remove (TAO_LB_ReplicaProxy *) = 0;
+
+  /**
+   * The load on one proxy has changed.
+   * @@ Ossama: see my comments on LoadBalancing_i about changing the
+   * signature of this method.
+   */
+  virtual void load_changed (TAO_LB_ReplicaProxy *proxy,
+                             CORBA::Environment &ACE_TRY_ENV);
+};
+
+#if !defined (__ACE_INLINE__)
+#include "LoadBalancing_Strategy.i"
+#endif /* __ACE_INLINE__ */
+
+#include "ace/post.h"
+
+#endif  /* TAO_LB_BALANCING_STRATEGY_H */