Java Jar File Find findJarsDir(String sparkHome, String scalaVersion, boolean failIfNotFound)

Description

Find the location of the Spark jars dir, depending on whether we're looking at a build or a distribution directory.

License

Apache License

Declaration

static String findJarsDir(String sparkHome, String scalaVersion, boolean failIfNotFound) 

Method Source Code

//package com.java2s;
/*//from   ww  w. j a  va  2s .com
 * 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.
 */

import java.io.File;

public class Main {
    /**
     * Find the location of the Spark jars dir, depending on whether we're looking at a build
     * or a distribution directory.
     */
    static String findJarsDir(String sparkHome, String scalaVersion, boolean failIfNotFound) {
        // TODO: change to the correct directory once the assembly build is changed.
        File libdir;
        if (new File(sparkHome, "RELEASE").isFile()) {
            libdir = new File(sparkHome, "jars");
            checkState(!failIfNotFound || libdir.isDirectory(), "Library directory '%s' does not exist.",
                    libdir.getAbsolutePath());
        } else {
            libdir = new File(sparkHome, String.format("assembly/target/scala-%s/jars", scalaVersion));
            if (!libdir.isDirectory()) {
                checkState(!failIfNotFound, "Library directory '%s' does not exist; make sure Spark is built.",
                        libdir.getAbsolutePath());
                libdir = null;
            }
        }
        return libdir != null ? libdir.getAbsolutePath() : null;
    }

    /** Throws IllegalStateException with the given message if the check is false. */
    static void checkState(boolean check, String msg, Object... args) {
        if (!check) {
            throw new IllegalStateException(String.format(msg, args));
        }
    }
}

Related

1. findJarContaining(Class c)
2. findJarEntry(String entryName, JarInputStream jarFile)
3. findJarFiles(String[] classPathLines)
4. findJars(File folder)
5. findJars(File libDir)
6. findJarsFromDirectory(File targetDirectory)
7. findJarsNamesInPath(String path)
8. getJarFile(@Nonnull Class clazz)
9. getJarFile(Class clazz)