org.apache.slider.server.services.workflow.TestWorkflowForkedProcessService.java Source code

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Here is the source code for org.apache.slider.server.services.workflow.TestWorkflowForkedProcessService.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.slider.server.services.workflow;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.service.ServiceOperations;
import org.apache.slider.test.SliderTestUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeoutException;

/**
 * Test the long lived process by executing a command that works and a command
 * that fails
 */
public class TestWorkflowForkedProcessService extends WorkflowServiceTestBase {
    private static final Logger log = LoggerFactory.getLogger(TestWorkflowForkedProcessService.class);

    private static final Logger processLog = LoggerFactory.getLogger("org.apache.hadoop.services.workflow.Process");
    public static final int RECENT_OUTPUT_SLEEP_DURATION = 4000;

    private ForkedProcessService process;
    private File testDir = new File("target");
    private ProcessCommandFactory commandFactory;
    private Map<String, String> env = new HashMap<String, String>();

    @Before
    public void setupProcesses() {
        commandFactory = ProcessCommandFactory.createProcessCommandFactory();
    }

    @After
    public void stopProcesses() {
        ServiceOperations.stop(process);
    }

    @Test
    public void testLs() throws Throwable {

        initProcess(commandFactory.ls(testDir));
        exec();
        assertFalse(process.isProcessRunning());
        Integer exitCode = process.getExitCode();
        assertNotNull("null exit code", exitCode);
        assertEquals(0, exitCode.intValue());
        // assert that the service did not fail
        assertNull(process.getFailureCause());
    }

    @Test
    public void testExitCodes() throws Throwable {
        SliderTestUtils.skipOnWindows();

        initProcess(commandFactory.exitFalse());
        exec();
        assertFalse(process.isProcessRunning());
        Integer exitCode = process.getExitCode();
        assertNotNull("null exit code", exitCode);
        assertTrue(exitCode != 0);
        int corrected = process.getExitCodeSignCorrected();
        assertEquals(1, corrected);
        // assert that the exit code was uprated to a service failure
        assertNotNull(process.getFailureCause());

    }

    @Test
    public void testEcho() throws Throwable {
        SliderTestUtils.skipOnWindows();
        String echoText = "hello, world";
        initProcess(commandFactory.echo(echoText));
        exec();
        Integer exitCode = process.getExitCode();
        assertNotNull("null exit code", exitCode);
        assertEquals(0, exitCode.intValue());
        assertStringInOutput(echoText, getFinalOutput());

    }

    @Test
    public void testSetenv() throws Throwable {

        String var = "TEST_RUN";
        String val = "TEST-RUN-ENV-VALUE";
        env.put(var, val);
        initProcess(commandFactory.env());
        exec();
        Integer exitCode = process.getExitCode();
        assertNotNull("null exit code", exitCode);
        assertEquals(0, exitCode.intValue());
        assertStringInOutput(val, getFinalOutput());
    }

    /**
     * Get the final output. includes a quick sleep for the tail output
     * @return the last output
     */
    private List<String> getFinalOutput() {
        return process.getRecentOutput(true, RECENT_OUTPUT_SLEEP_DURATION);
    }

    private ForkedProcessService initProcess(List<String> commands) throws IOException {
        process = new ForkedProcessService(name.getMethodName(), env, commands);
        process.init(new Configuration());

        return process;
    }

    public void exec() throws InterruptedException, TimeoutException {
        assertNotNull(process);
        process.start();
        assert process.waitForServiceToStop(5000);
    }

}