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Server functionality for HBase
/*
* 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.hadoop.hbase.mapreduce;
import com.google.common.base.Preconditions;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLDecoder;
import java.text.MessageFormat;
import java.util.Enumeration;
import java.util.jar.JarFile;
import java.util.jar.JarOutputStream;
import java.util.jar.Manifest;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
/**
* Finds the Jar for a class. If the class is in a directory in the
* classpath, it creates a Jar on the fly with the contents of the directory
* and returns the path to that Jar. If a Jar is created, it is created in
* the system temporary directory.
*
* This file was forked from hadoop/common/branches/branch-2@1377176.
*/
public class JarFinder {
private static void copyToZipStream(File file, ZipEntry entry,
ZipOutputStream zos) throws IOException {
InputStream is = new FileInputStream(file);
try {
zos.putNextEntry(entry);
byte[] arr = new byte[4096];
int read = is.read(arr);
while (read > -1) {
zos.write(arr, 0, read);
read = is.read(arr);
}
} finally {
try {
is.close();
} finally {
zos.closeEntry();
}
}
}
public static void jarDir(File dir, String relativePath, ZipOutputStream zos)
throws IOException {
Preconditions.checkNotNull(relativePath, "relativePath");
Preconditions.checkNotNull(zos, "zos");
// by JAR spec, if there is a manifest, it must be the first entry in the
// ZIP.
File manifestFile = new File(dir, JarFile.MANIFEST_NAME);
ZipEntry manifestEntry = new ZipEntry(JarFile.MANIFEST_NAME);
if (!manifestFile.exists()) {
zos.putNextEntry(manifestEntry);
new Manifest().write(new BufferedOutputStream(zos));
zos.closeEntry();
} else {
copyToZipStream(manifestFile, manifestEntry, zos);
}
zos.closeEntry();
zipDir(dir, relativePath, zos, true);
zos.close();
}
private static void zipDir(File dir, String relativePath, ZipOutputStream zos,
boolean start) throws IOException {
String[] dirList = dir.list();
for (String aDirList : dirList) {
File f = new File(dir, aDirList);
if (!f.isHidden()) {
if (f.isDirectory()) {
if (!start) {
ZipEntry dirEntry = new ZipEntry(relativePath + f.getName() + "/");
zos.putNextEntry(dirEntry);
zos.closeEntry();
}
String filePath = f.getPath();
File file = new File(filePath);
zipDir(file, relativePath + f.getName() + "/", zos, false);
}
else {
String path = relativePath + f.getName();
if (!path.equals(JarFile.MANIFEST_NAME)) {
ZipEntry anEntry = new ZipEntry(path);
copyToZipStream(f, anEntry, zos);
}
}
}
}
}
private static void createJar(File dir, File jarFile) throws IOException {
Preconditions.checkNotNull(dir, "dir");
Preconditions.checkNotNull(jarFile, "jarFile");
File jarDir = jarFile.getParentFile();
if (!jarDir.exists()) {
if (!jarDir.mkdirs()) {
throw new IOException(MessageFormat.format("could not create dir [{0}]",
jarDir));
}
}
JarOutputStream zos = new JarOutputStream(new FileOutputStream(jarFile));
jarDir(dir, "", zos);
}
/**
* Returns the full path to the Jar containing the class. It always return a
* JAR.
*
* @param klass class.
*
* @return path to the Jar containing the class.
*/
public static String getJar(Class klass) {
Preconditions.checkNotNull(klass, "klass");
ClassLoader loader = klass.getClassLoader();
if (loader != null) {
String class_file = klass.getName().replaceAll("\\.", "/") + ".class";
try {
for (Enumeration itr = loader.getResources(class_file);
itr.hasMoreElements(); ) {
URL url = (URL) itr.nextElement();
String path = url.getPath();
if (path.startsWith("file:")) {
path = path.substring("file:".length());
}
path = URLDecoder.decode(path, "UTF-8");
if ("jar".equals(url.getProtocol())) {
path = URLDecoder.decode(path, "UTF-8");
return path.replaceAll("!.*$", "");
}
else if ("file".equals(url.getProtocol())) {
String klassName = klass.getName();
klassName = klassName.replace(".", "/") + ".class";
path = path.substring(0, path.length() - klassName.length());
File baseDir = new File(path);
File testDir = new File(System.getProperty("test.build.dir", "target/test-dir"));
testDir = testDir.getAbsoluteFile();
if (!testDir.exists()) {
testDir.mkdirs();
}
File tempJar = File.createTempFile("hadoop-", "", testDir);
tempJar = new File(tempJar.getAbsolutePath() + ".jar");
tempJar.deleteOnExit();
createJar(baseDir, tempJar);
return tempJar.getAbsolutePath();
}
}
}
catch (IOException e) {
throw new RuntimeException(e);
}
}
return null;
}
}