svn commit: r547161 - /activemq/camel/trunk/components/camel-spring/src/main/java/org/apache/camel/spring/Main.java

[js...@apache.org]

Author: jstrachan
Date: Thu Jun 14 00:45:44 2007
New Revision: 547161

URL: http://svn.apache.org/viewvc?view=rev&rev=547161
Log:
added a simple command line tool

Added:
    activemq/camel/trunk/components/camel-spring/src/main/java/org/apache/camel/spring/Main.java

Added: activemq/camel/trunk/components/camel-spring/src/main/java/org/apache/camel/spring/Main.java
URL: http://svn.apache.org/viewvc/activemq/camel/trunk/components/camel-spring/src/main/java/org/apache/camel/spring/Main.java?view=auto&rev=547161
==============================================================================
--- activemq/camel/trunk/components/camel-spring/src/main/java/org/apache/camel/spring/Main.java (added)
+++ activemq/camel/trunk/components/camel-spring/src/main/java/org/apache/camel/spring/Main.java Thu Jun 14 00:45:44 2007
@@ -0,0 +1,174 @@
+/*
+ * 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.camel.spring;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * A command line tool for booting up a CamelContext using an
+ * optional Spring ApplicationContext
+ *
+ * @version $Revision: $
+ */
+public class Main {
+
+    private String applicationContextUri;
+
+    private List<Option> options = new ArrayList<Option>();
+    private CountDownLatch latch = new CountDownLatch(1);
+    private AtomicBoolean completed = new AtomicBoolean(false);
+
+    public static void main(String[] args) {
+        Main main = new Main();
+        main.run(args);
+    }
+
+    public Main() {
+        addOption(new Option("h", "help", "Displays the help screen") {
+            protected void doProcess(String arg, LinkedList<String> remainingArgs) {
+                showOptions();
+                completed();
+            }
+        });
+    }
+
+
+    /**
+     * Runs this process with the given arguments
+     */
+    public void run(String[] args) {
+        if (!parseArguments(args)) {
+            showOptions();
+            return;
+        }
+        if (!completed.get()) {
+            start();
+            waitUntilCompleted();
+            stop();
+        }
+    }
+
+    protected void start() {
+        // TODO
+    }
+
+    protected void stop() {
+        // TODO
+    }
+
+    protected void waitUntilCompleted() {
+        while (!completed.get()) {
+            try {
+                latch.await();
+            }
+            catch (InterruptedException e) {
+                // ignore
+            }
+        }
+    }
+
+    /**
+     * Marks this process as being completed
+     */
+    public void completed() {
+        completed.set(true);
+        latch.countDown();
+    }
+
+    /**
+     * Displays the command line options
+     */
+    public void showOptions() {
+        System.out.println("Apache Camel Runner takes the following options");
+
+        for (Option option : options) {
+            System.out.println("  -" + option.getAbbreviation() + " or -" + option.getFullName()
+                    + " = " + option.getDescription());
+        }
+    }
+
+    public boolean parseArguments(String[] arguments) {
+        LinkedList<String> args = new LinkedList<String>(Arrays.asList(arguments));
+
+        if (args.isEmpty()) {
+            return false;
+        }
+        while (!args.isEmpty()) {
+            String arg = args.removeFirst();
+
+            boolean handled = false;
+            for (Option option : options) {
+                if (option.processOption(arg, args)) {
+                    handled = true;
+                    break;
+                }
+            }
+            if (!handled) {
+                System.out.println("Unknown option: " + arg);
+                return false;
+            }
+        }
+        return true;
+
+    }
+
+
+    public void addOption(Option option) {
+        options.add(option);
+    }
+
+
+    public abstract class Option {
+        private String abbreviation;
+        private String fullName;
+        private String description;
+
+        protected Option(String abbreviation, String fullName, String description) {
+            this.abbreviation = abbreviation;
+            this.fullName = fullName;
+            this.description = description;
+        }
+
+        public boolean processOption(String arg, LinkedList<String> remainingArgs) {
+            if (arg.equalsIgnoreCase(abbreviation) || fullName.startsWith(fullName)) {
+                doProcess(arg, remainingArgs);
+                return true;
+            }
+            return false;
+        }
+
+        public String getAbbreviation() {
+            return abbreviation;
+        }
+
+        public String getDescription() {
+            return description;
+        }
+
+        public String getFullName() {
+            return fullName;
+        }
+
+        protected abstract void doProcess(String arg, LinkedList<String> remainingArgs);
+    }
+
+}