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org.apache.activemq.console.command.CreateCommand Maven / Gradle / Ivy
/*
* 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 org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.*;
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 java.io.*;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.List;
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 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 = "[$][{]brokerName[}]"; // use to replace broker name property holders
protected String amqConf = "conf/activemq.xml"; // default conf if no conf is specified via --amqconf
// default files to create
protected String[][] fileWriteMap = {
{ "winActivemq", "bin/${brokerName}.bat" },
{ "unixActivemq", "bin/${brokerName}" }
};
protected String brokerName;
protected File amqHome;
protected File targetAmqBase;
@Override
public String getName() {
return "create";
}
@Override
public String getOneLineDescription() {
return "Creates a runnable broker instance in the specified path.";
}
protected void runTask(List 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);
copyConfDirectory(new File(amqHome, "conf"), new File(targetAmqBase, "conf"));
}
}
/**
* Handle the --amqconf options.
*
* @param token - option token to handle
* @param tokens - succeeding command arguments
* @throws Exception
*/
protected void handleOption(String token, List 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 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("[$][{]activemq.base[}]", targetAmqBase.getCanonicalPath().replaceAll("[\\\\]", "/"), data);
} else if (typeName.equals("unixActivemq")) {
data = getUnixActivemqData();
data = resolveParam("[$][{]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();
try(FileOutputStream fos = new FileOutputStream(dest);
FileChannel destinationChannel = fos.getChannel()) {
destinationChannel.write(buf);
}
// 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;
}
try(FileInputStream fis = new FileInputStream(from);
FileChannel sourceChannel = fis.getChannel();
FileOutputStream fos = new FileOutputStream(dest);
FileChannel destinationChannel = fos.getChannel()) {
sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
}
}
private void copyConfDirectory(File from, File dest) throws IOException {
if (from.isDirectory()) {
String files[] = from.list();
for (String file : files) {
File srcFile = new File(from, file);
if (srcFile.isFile() && !srcFile.getName().equals("activemq.xml")) {
File destFile = new File(dest, file);
context.print("Copying from: " + srcFile.getCanonicalPath() + "\n to: " + destFile.getCanonicalPath());
copyFile(srcFile, destFile);
}
}
} else {
throw new IOException(from + " is not a directory");
}
}
// 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%";
private String getUnixActivemqData() {
StringBuffer res = new StringBuffer();
res.append("## Figure out the ACTIVEMQ_BASE from the directory this script was run from\n");
res.append("PRG=\"$0\"\n");
res.append("progname=`basename \"$0\"`\n");
res.append("saveddir=`pwd`\n");
res.append("# need this for relative symlinks\n");
res.append("dirname_prg=`dirname \"$PRG\"`\n");
res.append("cd \"$dirname_prg\"\n");
res.append("while [ -h \"$PRG\" ] ; do\n");
res.append(" ls=`ls -ld \"$PRG\"`\n");
res.append(" link=`expr \"$ls\" : '.*-> \\(.*\\)$'`\n");
res.append(" if expr \"$link\" : '.*/.*' > /dev/null; then\n");
res.append(" PRG=\"$link\"\n");
res.append(" else\n");
res.append(" PRG=`dirname \"$PRG\"`\"/$link\"\n");
res.append(" fi\n");
res.append("done\n");
res.append("ACTIVEMQ_BASE=`dirname \"$PRG\"`/..\n");
res.append("cd \"$saveddir\"\n\n");
res.append("ACTIVEMQ_BASE=`cd \"$ACTIVEMQ_BASE\" && pwd`\n\n");
res.append("## Enable remote debugging\n");
res.append("#export ACTIVEMQ_DEBUG_OPTS=\"-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005\"\n\n");
res.append("## Add system properties for this instance here (if needed), e.g\n");
res.append("#export ACTIVEMQ_OPTS_MEMORY=\"-Xms256M -Xmx1G\"\n");
res.append("#export ACTIVEMQ_OPTS=\"$ACTIVEMQ_OPTS_MEMORY -Dorg.apache.activemq.UseDedicatedTaskRunner=true -Djava.util.logging.config.file=logging.properties\"\n\n");
res.append("export ACTIVEMQ_HOME=${activemq.home}\n");
res.append("export ACTIVEMQ_BASE=$ACTIVEMQ_BASE\n\n");
res.append("${ACTIVEMQ_HOME}/bin/activemq \"$@\"");
return res.toString();
}
}
