com.streamsets.datacollector.cluster.TarFileCreator.java Source code

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Here is the source code for com.streamsets.datacollector.cluster.TarFileCreator.java

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/**
 * Copyright 2015 StreamSets Inc.
 *
 * Licensed under 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 com.streamsets.datacollector.cluster;

import com.streamsets.pipeline.api.impl.Utils;
import org.apache.commons.io.IOUtils;
import org.kamranzafar.jtar.TarEntry;
import org.kamranzafar.jtar.TarHeader;
import org.kamranzafar.jtar.TarOutputStream;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.List;
import java.util.Map;
import java.util.zip.GZIPOutputStream;

public class TarFileCreator {

    private TarFileCreator() {
    }

    public static void createLibsTarGz(List<URL> apiCl, List<URL> containerCL,
            Map<String, List<URL>> streamsetsLibsCl, Map<String, List<URL>> userLibsCL, File staticWebDir,
            File outputFile) throws IOException {
        long now = System.currentTimeMillis() / 1000L;
        FileOutputStream dest = new FileOutputStream(outputFile);
        TarOutputStream out = new TarOutputStream(new BufferedOutputStream(new GZIPOutputStream(dest), 65536));
        // api-lib
        String prefix = ClusterModeConstants.API_LIB;
        out.putNextEntry(new TarEntry(TarHeader.createHeader(prefix, 0L, now, true)));
        addClasspath(prefix, out, apiCl);
        prefix = ClusterModeConstants.CONTAINER_LIB;
        out.putNextEntry(new TarEntry(TarHeader.createHeader(prefix, 0L, now, true)));
        addClasspath(prefix, out, containerCL);
        addLibrary(ClusterModeConstants.STREAMSETS_LIBS, now, out, streamsetsLibsCl);
        addLibrary(ClusterModeConstants.USER_LIBS, now, out, userLibsCL);
        tarFolder(null, staticWebDir.getAbsolutePath(), out);
        out.putNextEntry(new TarEntry(TarHeader.createHeader("libs-common-lib", 0L, now, true)));
        out.flush();
        out.close();
    }

    public static void createTarGz(File dir, File outputFile) throws IOException {
        Utils.checkState(dir.isDirectory(), Utils.formatL("Path {} is not a directory", dir));
        Utils.checkState(dir.canRead(), Utils.formatL("Directory {} cannot be read", dir));
        FileOutputStream dest = new FileOutputStream(outputFile);
        TarOutputStream out = new TarOutputStream(new BufferedOutputStream(new GZIPOutputStream(dest), 65536));
        File[] files = dir.listFiles();
        Utils.checkState(files != null, Utils.formatL("Directory {} could not be read", dir));
        Utils.checkState(files.length > 0, Utils.formatL("Directory {} is empty", dir));
        tarFolder(null, dir.getAbsolutePath(), out);
        out.close();
    }

    private static void addLibrary(final String originalPrefix, long now, TarOutputStream out,
            Map<String, List<URL>> lib) throws IOException {
        out.putNextEntry(new TarEntry(TarHeader.createHeader(originalPrefix, 0L, now, true)));
        for (Map.Entry<String, List<URL>> entry : lib.entrySet()) {
            String prefix = originalPrefix;
            prefix += "/" + entry.getKey();
            out.putNextEntry(new TarEntry(TarHeader.createHeader(prefix, 0L, now, true)));
            prefix += "/lib";
            out.putNextEntry(new TarEntry(TarHeader.createHeader(prefix, 0L, now, true)));
            addClasspath(prefix, out, entry.getValue());
        }
    }

    private static void addClasspath(String prefix, TarOutputStream out, List<URL> urls) throws IOException {
        if (urls != null) {
            for (URL url : urls) {
                File file = new File(url.getPath());
                String name = file.getName();
                if (name.endsWith(".jar")) {
                    out.putNextEntry(new TarEntry(file, prefix + "/" + file.getName()));
                    BufferedInputStream src = new BufferedInputStream(new FileInputStream(file), 65536);
                    IOUtils.copy(src, out);
                    src.close();
                    out.flush();
                }
            }
        }
    }

    /**
     * Copied from https://raw.githubusercontent.com/kamranzafar/jtar/master/src/test/java/org/kamranzafar/jtar/JTarTest.java
     */
    private static void tarFolder(String parent, String path, TarOutputStream out) throws IOException {
        BufferedInputStream src = null;
        File f = new File(path);
        String files[] = f.list();
        // is file
        if (files == null) {
            files = new String[1];
            files[0] = f.getName();
        }
        parent = ((parent == null) ? (f.isFile()) ? "" : f.getName() + "/" : parent + f.getName() + "/");
        for (int i = 0; i < files.length; i++) {
            File fe = f;
            if (f.isDirectory()) {
                fe = new File(f, files[i]);
            }
            if (fe.isDirectory()) {
                String[] fl = fe.list();
                if (fl != null && fl.length != 0) {
                    tarFolder(parent, fe.getPath(), out);
                } else {
                    TarEntry entry = new TarEntry(fe, parent + files[i] + "/");
                    out.putNextEntry(entry);
                }
                continue;
            }
            FileInputStream fi = new FileInputStream(fe);
            src = new BufferedInputStream(fi);
            TarEntry entry = new TarEntry(fe, parent + files[i]);
            out.putNextEntry(entry);
            IOUtils.copy(src, out);
            src.close();
            out.flush();
        }
    }
}