1 files changed, 98 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/tools/messagestore/commands/Help.java b/qpid/java/broker/src/main/java/org/apache/qpid/tools/messagestore/commands/Help.java
new file mode 100644
index 0000000000..0f9546541b
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/tools/messagestore/commands/Help.java
@@ -0,0 +1,98 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.    
+ *
+ * 
+ */
+package org.apache.qpid.tools.messagestore.commands;
+
+import org.apache.qpid.tools.messagestore.MessageStoreTool;
+import org.apache.qpid.tools.utils.Console;
+
+import java.util.LinkedList;
+import java.util.Map;
+
+public class Help extends AbstractCommand
+{
+    public Help(MessageStoreTool tool)
+    {
+        super(tool);
+    }
+
+    public String help()
+    {
+        return "Provides detailed help on commands.";
+    }
+
+    public String getCommand()
+    {
+        return "help";
+    }
+
+    public String usage()
+    {
+        return "help [<command>]";
+    }
+
+    public void execute(String... args)
+    {
+        assert args.length > 0;
+        assert args[0].equals(getCommand());
+
+        if (args.length > 1)
+        {
+            Command command = _tool.getCommands().get(args[1]);
+            if (command != null)
+            {
+                _console.println(command.help());
+                _console.println("Usage:" + command.usage());
+            }
+            else
+            {
+                commandError("Command not found: ", args);
+            }
+        }
+        else
+        {
+            java.util.List<java.util.List> data = new LinkedList<java.util.List>();
+
+            java.util.List<String> commandName = new LinkedList<String>();
+            java.util.List<String> commandDescription = new LinkedList<String>();
+
+            data.add(commandName);
+            data.add(commandDescription);
+
+            //Set up Headers
+            commandName.add("Command");
+            commandDescription.add("Description");
+
+            commandName.add(Console.ROW_DIVIDER);
+            commandDescription.add(Console.ROW_DIVIDER);
+
+            //Add current Commands with descriptions
+            Map<String, Command> commands = _tool.getCommands();
+
+            for (Command command : commands.values())
+            {
+                commandName.add(command.getCommand());
+                commandDescription.add(command.help());
+            }
+
+            _console.printMap("Available Commands", data);
+        }
+    }
+}