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Subject: svn commit: r829073 -
 /activemq/trunk/activemq-console/src/main/java/org/apache/activemq/console/command/CreateCommand.java
Date: Fri, 23 Oct 2009 14:15:00 -0000
To: commits@activemq.apache.org
From: dejanb@apache.org
Message-Id: <20091023141500.ED6E5238888E@eris.apache.org>

Author: dejanb
Date: Fri Oct 23 14:15:00 2009
New Revision: 829073

URL: http://svn.apache.org/viewvc?rev=829073&view=rev
Log:
https://issues.apache.org/activemq/browse/AMQ-2462 - new activemq-admin commands - create command

Added:
    activemq/trunk/activemq-console/src/main/java/org/apache/activemq/console/command/CreateCommand.java

Added: activemq/trunk/activemq-console/src/main/java/org/apache/activemq/console/command/CreateCommand.java
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-console/src/main/java/org/apache/activemq/console/command/CreateCommand.java?rev=829073&view=auto
==============================================================================
--- activemq/trunk/activemq-console/src/main/java/org/apache/activemq/console/command/CreateCommand.java (added)
+++ activemq/trunk/activemq-console/src/main/java/org/apache/activemq/console/command/CreateCommand.java Fri Oct 23 14:15:00 2009
@@ -0,0 +1,292 @@
+/*
+ * 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.activemq.console.command;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.util.List;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.Result;
+import javax.xml.transform.Source;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathConstants;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFactory;
+
+import org.w3c.dom.Attr;
+import org.w3c.dom.Element;
+import org.xml.sax.SAXException;
+
+public class CreateCommand extends AbstractCommand {
+
+    protected final String[] helpFile = new String[] {
+        "Task Usage: Main create path/to/brokerA [create-options]",
+        "Description:  Creates a runnable broker instance in the specified path.",
+        "",
+        "List Options:",
+        "    --amqconf <file path>   Path to ActiveMQ conf file that will be used in the broker instance. Default is: conf/activemq.xml",
+        "    --version               Display the version information.",
+        "    -h,-?,--help            Display the create broker help information.",
+        ""
+    };
+
+    protected final String DEFAULT_TARGET_ACTIVEMQ_CONF = "conf/activemq.xml"; // default activemq conf to create in the new broker instance
+    protected final String DEFAULT_BROKERNAME_XPATH = "/beans/broker/@brokerName"; // default broker name xpath to change the broker name
+
+    protected final String[] BASE_SUB_DIRS = { "bin", "conf" }; // default sub directories that will be created
+    protected final String BROKER_NAME_REGEX = "[$][{]brokerName[}]"; // use to replace broker name property holders
+
+    protected String amqConf = "conf/activemq.xml"; // default conf if no conf is specified via --amqconf
+
+    // default files to copy from activemq home to the new broker instance
+    protected String[][] fileCopyMap = {
+        { "conf/log4j.properties", "conf/log4j.properties" },
+        { "conf/broker.ks", "conf/broker.ks" },
+        { "conf/broker.ts", "conf/broker.ts" },
+        { "conf/camel.xml", "conf/camel.xml" },
+        { "conf/jetty.xml", "conf/jetty.xml" },
+        { "conf/credentials.properties", "conf/credentials.properties" }
+    };
+
+    // default files to create 
+    protected String[][] fileWriteMap = {
+        { "winActivemq", "bin/${brokerName}.bat" },
+        { "unixActivemq", "bin/${brokerName}" }
+    };
+
+
+    protected String brokerName;
+    protected File amqHome;
+    protected File targetAmqBase;
+
+    protected void runTask(List<String> tokens) throws Exception {
+        context.print("Running create broker task...");
+        amqHome = new File(System.getProperty("activemq.home"));
+        for (String token : tokens) {
+
+            targetAmqBase = new File(token);
+            brokerName = targetAmqBase.getName();
+            
+
+            if (targetAmqBase.exists()) {
+                BufferedReader console = new BufferedReader(new InputStreamReader(System.in));
+                String resp;
+                while (true) {
+                    context.print("Target directory (" + targetAmqBase.getCanonicalPath() + ") already exists. Overwrite (y/n): ");
+                    resp = console.readLine();
+                    if (resp.equalsIgnoreCase("y") || resp.equalsIgnoreCase("yes")) {
+                        break;
+                    } else if (resp.equalsIgnoreCase("n") || resp.equalsIgnoreCase("no")) {
+                        return;
+                    }
+                }
+            }
+
+            context.print("Creating directory: " + targetAmqBase.getCanonicalPath());
+            targetAmqBase.mkdirs();
+            createSubDirs(targetAmqBase, BASE_SUB_DIRS);
+            writeFileMapping(targetAmqBase, fileWriteMap);
+            copyActivemqConf(amqHome, targetAmqBase, amqConf);
+            copyFileMapping(amqHome, targetAmqBase, fileCopyMap);
+        }
+    }
+
+    /**
+     * Handle the --amqconf options.
+     *
+     * @param token  - option token to handle
+     * @param tokens - succeeding command arguments
+     * @throws Exception
+     */
+    protected void handleOption(String token, List<String> tokens) throws Exception {
+        if (token.startsWith("--amqconf")) {
+            // If no amqconf specified, or next token is a new option
+            if (tokens.isEmpty() || tokens.get(0).startsWith("-")) {
+                context.printException(new IllegalArgumentException("Attributes to amqconf not specified"));
+                return;
+            }
+
+            amqConf = tokens.remove(0);
+        } else {
+            // Let super class handle unknown option
+            super.handleOption(token, tokens);
+        }
+    }
+
+    protected void createSubDirs(File target, String[] subDirs) throws IOException {
+        File subDirFile;
+        for (String subDir : BASE_SUB_DIRS) {
+            subDirFile = new File(target, subDir);
+            context.print("Creating directory: " + subDirFile.getCanonicalPath());
+            subDirFile.mkdirs();
+        }
+    }
+
+    protected void writeFileMapping(File targetBase, String[][] fileWriteMapping) throws IOException {
+        for (String[] fileWrite : fileWriteMapping) {
+            File dest = new File(targetBase, resolveParam(BROKER_NAME_REGEX, brokerName, fileWrite[1]));
+            context.print("Creating new file: " + dest.getCanonicalPath());
+            writeFile(fileWrite[0], dest);
+        }
+    }
+
+    protected void copyFileMapping(File srcBase, File targetBase, String[][] fileMapping) throws IOException {
+        for (String[] fileMap : fileMapping) {
+            File src = new File(srcBase, fileMap[0]);
+            File dest = new File(targetBase, resolveParam(BROKER_NAME_REGEX, brokerName, fileMap[1]));
+            context.print("Copying from: " + src.getCanonicalPath() + "\n          to: " + dest.getCanonicalPath());
+            copyFile(src, dest);
+        }
+    }
+
+    protected void copyActivemqConf(File srcBase, File targetBase, String activemqConf) throws IOException, ParserConfigurationException, SAXException, TransformerException, XPathExpressionException {
+        File src = new File(srcBase, activemqConf);
+
+        if (!src.exists()) {
+            throw new FileNotFoundException("File: " + src.getCanonicalPath() + " not found.");
+        }
+
+        File dest = new File(targetBase, DEFAULT_TARGET_ACTIVEMQ_CONF);
+        context.print("Copying from: " + src.getCanonicalPath() + "\n          to: " + dest.getCanonicalPath());
+
+        DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
+        Element docElem = builder.parse(src).getDocumentElement();
+
+        XPath xpath = XPathFactory.newInstance().newXPath();
+        Attr brokerNameAttr = (Attr) xpath.evaluate(DEFAULT_BROKERNAME_XPATH, docElem, XPathConstants.NODE);
+        brokerNameAttr.setValue(brokerName);
+
+        writeToFile(new DOMSource(docElem), dest);
+    }
+
+    protected void printHelp() {
+        context.printHelp(helpFile);
+    }
+
+    // write the default files to create (i.e. script files)
+    private void writeFile(String typeName, File dest) throws IOException {
+        String data;
+        if (typeName.equals("winActivemq")) {
+            data = winActivemqData;
+            data = resolveParam("[$][{]activemq.home[}]", amqHome.getCanonicalPath().replaceAll("[\\\\]", "/"), data);
+            data = resolveParam("[$][{]activemq.base[}]", targetAmqBase.getCanonicalPath().replaceAll("[\\\\]", "/"), data);
+        } else if (typeName.equals("unixActivemq")) {
+            data = unixActivemqData;
+            data = resolveParam("[$][{]activemq.home[}]", amqHome.getCanonicalPath().replaceAll("[\\\\]", "/"), data);
+            data = resolveParam("[$][{]activemq.base[}]", targetAmqBase.getCanonicalPath().replaceAll("[\\\\]", "/"), data);
+        } else {
+            throw new IllegalStateException("Unknown file type: " + typeName);
+        }
+
+        ByteBuffer buf = ByteBuffer.allocate(data.length());
+        buf.put(data.getBytes());
+        buf.flip();
+
+        FileChannel destinationChannel = new FileOutputStream(dest).getChannel();
+        destinationChannel.write(buf);
+        destinationChannel.close();
+
+        // Set file permissions available for Java 6.0 only
+//        dest.setExecutable(true);
+//        dest.setReadable(true);
+//        dest.setWritable(true);
+    }
+
+    // utlity method to write an xml source to file
+    private void writeToFile(Source src, File file) throws TransformerException {
+        TransformerFactory tFactory = TransformerFactory.newInstance();
+        Transformer fileTransformer = tFactory.newTransformer();
+
+        Result res = new StreamResult(file);
+        fileTransformer.transform(src, res);
+    }
+
+    // utility method to copy one file to another
+    private void copyFile(File from, File dest) throws IOException {
+        if (!from.exists()) {
+            return;
+        }
+        FileChannel sourceChannel = new FileInputStream(from).getChannel();
+        FileChannel destinationChannel = new FileOutputStream(dest).getChannel();
+        sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
+        sourceChannel.close();
+        destinationChannel.close();
+    }
+
+    // replace a property place holder (paramName) with the paramValue
+    private String resolveParam(String paramName, String paramValue, String target) {
+        return target.replaceAll(paramName, paramValue);
+    }
+
+    // Embedded windows script data
+    private static final String winActivemqData =
+        "@echo off\n"
+            + "set ACTIVEMQ_HOME=\"${activemq.home}\"\n"
+            + "set ACTIVEMQ_BASE=\"${activemq.base}\"\n"
+            + "\n"
+            + "set PARAM=%1\n"
+            + ":getParam\n"
+            + "shift\n"
+            + "if \"%1\"==\"\" goto end\n"
+            + "set PARAM=%PARAM% %1\n"
+            + "goto getParam\n"
+            + ":end\n"
+            + "\n"
+            + "%ACTIVEMQ_HOME%/bin/activemq %PARAM%";
+
+
+    // Embedded unix script data
+    private static final String unixActivemqData = "## Figure out the ACTIVEMQ_BASE from the directory this script was run from\n"
+        + "PRG=\"$0\"\n"
+        + "progname=`basename \"$0\"`\n"
+        + "saveddir=`pwd`\n"
+        + "# need this for relative symlinks\n"
+        + "dirname_prg=`dirname \"$PRG\"`\n"
+        + "cd \"$dirname_prg\"\n"
+        + "while [ -h \"$PRG\" ] ; do\n"
+        + "  ls=`ls -ld \"$PRG\"`\n"
+        + "  link=`expr \"$ls\" : '.*-> \\(.*\\)$'`\n"
+        + "  if expr \"$link\" : '.*/.*' > /dev/null; then\n"
+        + "    PRG=\"$link\"\n"
+        + "  else\n"
+        + "    PRG=`dirname \"$PRG\"`\"/$link\"\n"
+        + "  fi\n"
+        + "done\n"
+        + "ACTIVEMQ_BASE=`dirname \"$PRG\"`/..\n"
+        + "cd \"$saveddir\"\n"
+        + "\n"
+        + "ACTIVEMQ_BASE=`cd \"$ACTIVEMQ_BASE\" && pwd`\n\n"
+        + "export ACTIVEMQ_HOME=${activemq.home}\n"
+        + "export ACTIVEMQ_BASE=$ACTIVEMQ_BASE\n\n"
+        + "${ACTIVEMQ_HOME}/bin/activemq \"$*\"";
+
+}