com.cloudera.llama.server.TestAbstractServer.java Source code

Introduction

Here is the source code for com.cloudera.llama.server.TestAbstractServer.java

Source

/**
 * 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 com.cloudera.llama.server;

import junit.framework.Assert;
import org.apache.hadoop.conf.Configuration;
import org.junit.Test;

import javax.security.auth.Subject;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.CountDownLatch;

public class TestAbstractServer {
    private static final Set<String> STEPS = new HashSet<String>();

    static {
        STEPS.add("metrics");
        STEPS.add("jmx");
        STEPS.add("service");
        STEPS.add("transport");
    }

    public static class MyServer extends AbstractServer {
        private volatile boolean started = false;

        protected MyServer() {
            super("myServer");
        }

        private void trace(String propName) {
            getConf().setBoolean(propName + ".trace", true);
        }

        private void failIf(String propName) {
            if (getConf().getBoolean(propName + ".fail", false)) {
                throw new RuntimeException();
            }
        }

        @Override
        protected void startMetrics() {
            trace("start.metrics");
            failIf("start.metrics");
        }

        @Override
        protected void stopMetrics() {
            trace("stop.metrics");
            failIf("stop.metrics");
        }

        @Override
        protected void startJMX() {
            trace("start.jmx");
            failIf("start.jmx");
        }

        @Override
        protected void stopJMX() {
            trace("stop.jmx");
            failIf("stop.jmx");
        }

        @Override
        protected Subject loginServerSubject() {
            return new Subject();
        }

        @Override
        protected void startService() {
            trace("start.service");
            failIf("start.service");
        }

        @Override
        protected void stopService() {
            trace("stop.service");
            failIf("stop.service");
        }

        @Override
        protected void startTransport(CountDownLatch latch) {
            latch.countDown();
            trace("start.transport");
            failIf("start.transport");
            started = true;
        }

        @Override
        protected void stopTransport() {
            trace("stop.transport");
            failIf("stop.transport");
        }

        @Override
        public String getAddressHost() {
            return "localhost";
        }

        @Override
        public int getAddressPort() {
            return (started) ? 1 : 0;
        }
    }

    @Test
    public void testStartStopStepsOK() throws Exception {
        MyServer server = new MyServer();
        Configuration conf = new Configuration(false);
        server.setConf(conf);
        server.start();
        for (String step : STEPS) {
            Assert.assertTrue(conf.getBoolean("start." + step + ".trace", false));
            Assert.assertFalse(conf.getBoolean("stop." + step + ".trace", false));
        }
        for (String step : STEPS) {
            conf.setBoolean("start." + step + ".trace", false);
        }
        server.stop();
        for (String step : STEPS) {
            Assert.assertFalse(conf.getBoolean("start." + step + ".trace", false));
            Assert.assertTrue(conf.getBoolean("stop." + step + ".trace", false));
        }
    }

    @Test(expected = RuntimeException.class)
    public void testDoubleStartFailure() throws Exception {
        MyServer server = new MyServer();
        try {
            Configuration conf = new Configuration(false);
            server.setConf(conf);
            server.start();
            server.start();
        } finally {
            server.stop();
        }
    }

    @Test
    public void testStartStepsFailures() throws Exception {
        for (String step : STEPS) {
            MyServer server = new MyServer();
            Configuration conf = new Configuration(false);
            conf.setBoolean("start." + step + ".fail", true);
            server.setConf(conf);
            try {
                server.start();
                Assert.fail();
            } catch (RuntimeException ex) {
                //NOP        
            } catch (Exception ex) {
                Assert.fail();
            } finally {
                server.stop();
            }
        }
    }

    @Test
    public void testStopStepsFailures() throws Exception {
        for (String step : STEPS) {
            MyServer server = new MyServer();
            Configuration conf = new Configuration(false);
            conf.setBoolean("stop." + step + ".fail", true);
            server.setConf(conf);
            server.start();
            server.stop();
            for (String step2 : STEPS) {
                Assert.assertTrue(conf.getBoolean("start." + step2 + ".trace", false));
                Assert.assertTrue(conf.getBoolean("stop." + step2 + ".trace", false));
            }
        }
    }

    @Test
    public void testShutdown() throws Exception {
        final MyServer server = new MyServer();
        Configuration conf = new Configuration(false);
        server.setConf(conf);
        server.start();
        server.shutdown(1);
        Assert.assertEquals(1, server.getExitCode());
    }

}