org.apache.hadoop.hbase.util.TestDynamicClassLoader.java Source code

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Here is the source code for org.apache.hadoop.hbase.util.TestDynamicClassLoader.java

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/*
 *
 * 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.util;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.fail;

import java.io.File;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseCommonTestingUtility;
import org.apache.hadoop.hbase.SmallTests;
import org.junit.Test;
import org.junit.experimental.categories.Category;

/**
 * Test TestDynamicClassLoader
 */
@Category(SmallTests.class)
public class TestDynamicClassLoader {
    private static final Log LOG = LogFactory.getLog(TestDynamicClassLoader.class);

    private static final HBaseCommonTestingUtility TEST_UTIL = new HBaseCommonTestingUtility();
    private static final Configuration conf = TEST_UTIL.getConfiguration();

    static {
        conf.set("hbase.dynamic.jars.dir", TEST_UTIL.getDataTestDir().toString());
    }

    @Test
    public void testLoadClassFromLocalPath() throws Exception {
        ClassLoader parent = TestDynamicClassLoader.class.getClassLoader();
        DynamicClassLoader classLoader = new DynamicClassLoader(conf, parent);

        String className = "TestLoadClassFromLocalPath";
        deleteClass(className);
        try {
            classLoader.loadClass(className);
            fail("Should not be able to load class " + className);
        } catch (ClassNotFoundException cnfe) {
            // expected, move on
        }

        try {
            String folder = TEST_UTIL.getDataTestDir().toString();
            ClassLoaderTestHelper.buildJar(folder, className, null, ClassLoaderTestHelper.localDirPath(conf));
            classLoader.loadClass(className);
        } catch (ClassNotFoundException cnfe) {
            LOG.error("Should be able to load class " + className, cnfe);
            fail(cnfe.getMessage());
        }
    }

    @Test
    public void testLoadClassFromAnotherPath() throws Exception {
        ClassLoader parent = TestDynamicClassLoader.class.getClassLoader();
        DynamicClassLoader classLoader = new DynamicClassLoader(conf, parent);

        String className = "TestLoadClassFromAnotherPath";
        deleteClass(className);
        try {
            classLoader.loadClass(className);
            fail("Should not be able to load class " + className);
        } catch (ClassNotFoundException cnfe) {
            // expected, move on
        }

        try {
            String folder = TEST_UTIL.getDataTestDir().toString();
            ClassLoaderTestHelper.buildJar(folder, className, null);
            classLoader.loadClass(className);
        } catch (ClassNotFoundException cnfe) {
            LOG.error("Should be able to load class " + className, cnfe);
            fail(cnfe.getMessage());
        }
    }

    private void deleteClass(String className) throws Exception {
        String jarFileName = className + ".jar";
        File file = new File(TEST_UTIL.getDataTestDir().toString(), jarFileName);
        file.delete();
        assertFalse("Should be deleted: " + file.getPath(), file.exists());

        file = new File(conf.get("hbase.dynamic.jars.dir"), jarFileName);
        file.delete();
        assertFalse("Should be deleted: " + file.getPath(), file.exists());

        file = new File(ClassLoaderTestHelper.localDirPath(conf), jarFileName);
        file.delete();
        assertFalse("Should be deleted: " + file.getPath(), file.exists());
    }
}