1 files changed, 98 insertions, 0 deletions
diff --git a/ACE/examples/Web_Crawler/Command_Processor.h b/ACE/examples/Web_Crawler/Command_Processor.h
new file mode 100644
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+++ b/ACE/examples/Web_Crawler/Command_Processor.h
@@ -0,0 +1,98 @@
+/* -*- C++ -*- */
+// $Id$
+
+// ============================================================================
+//
+// = LIBRARY
+//    examples/Web_Crawler
+//
+// = FILENAME
+//    Command_Processor.h
+//
+// = AUTHOR
+//    Douglas C. Schmidt <schmidt@cs.wustl.edu>
+//
+// ============================================================================
+
+#ifndef _COMMAND_PROCESSOR_H
+#define _COMMAND_PROCESSOR_H
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+#pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "ace/Containers.h"
+#include "Options.h"
+
+// Forward decl.
+class URL;
+
+class Command
+{
+  // = TITLE
+  //     Abstract base class for a command.
+  //
+  // = DESCRIPTION
+  //     Each command is executed by a <Command_Processor>.
+public:
+  virtual ~Command (void);
+  // Virtual destructor.
+
+  virtual int execute (void) = 0;
+  // This is the entry point to execute the command.
+  virtual int destroy (void) = 0;
+};
+
+class URL_Command : public Command
+{
+  // = TITLE
+  //     Defines an API for executing a command on a URL.
+  //
+  // = DESCRIPTION
+  //     Each command is executed by a <Command_Processor>.
+public:
+  URL_Command (URL *);
+  // Constructor.
+  
+  virtual int execute (void);
+  // Execute the URL command.
+
+  int destroy (void);
+  // Commit suicide.
+private:
+  URL *url_;
+  // Pointer to the URL.
+};
+
+class Command_Processor
+{
+  // = TITLE
+  //     Execute commands that are passed to it.
+  //
+  // = DESCRIPTION
+  //     This class implements the Command Processor pattern.
+public:
+  Command_Processor (void);
+
+  int insert (Command *);
+  // Insert a new <Command> into the <Command_Processor>'s queue.
+
+  int execute (void);
+  // Execute all the <Commands> in the queue.
+
+  int destroy (void);
+  // Destroy the <Command_Processor>.
+
+private:
+  friend class ACE_Shutup_GPlusPlus;
+  // Turn off g++ warning
+
+  ~Command_Processor (void);
+  // Ensure dynamic allocation.
+
+  // @@ You fill in here...
+  ACE_Unbounded_Queue<Command *> url_queue_;
+};
+
+
+#endif /* _COMMAND_PROCESSOR_H */