org.apache.htrace.util.TestHTracedProcess.java Source code

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Here is the source code for org.apache.htrace.util.TestHTracedProcess.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.htrace.util;

import static org.junit.Assert.assertTrue;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Before;
import org.junit.Test;

/**
 * Test putting up an htraced and making sure it basically works.
 * Makes presumption about paths; where data is relative to the htraced binary, etc., encoded
 * in methods in the below.
 */
public class TestHTracedProcess {
    private static final Log LOG = LogFactory.getLog(TestHTracedProcess.class);
    private DataDir testDir = null;
    private final int TIMEOUT = 10000;

    @Before
    public void setupTest() {
        this.testDir = new DataDir();
    }

    /*
     * Do a basic GET of the server info from the running htraced instance.
     */
    private String doGet(final URL url) throws IOException {
        URLConnection connection = url.openConnection();
        connection.setConnectTimeout(TIMEOUT);
        connection.setReadTimeout(TIMEOUT);
        connection.connect();
        StringBuffer sb = new StringBuffer();
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        try {
            String line = null;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
                sb.append(line);
            }
        } finally {
            reader.close();
        }
        return sb.toString();
    }

    /**
     * Put up an htraced instance and do a Get against /server/info.
     * @throws IOException
     * @throws InterruptedException
     */
    @Test(timeout = 10000)
    public void testStartStopHTraced() throws Exception {
        HTracedProcess htraced = null;
        File dataDir = this.testDir.getDataDir();
        File topLevel = DataDir.getTopLevelOfCheckout(dataDir);
        try {
            htraced = new HTracedProcess(HTracedProcess.getPathToHTraceBinaryFromTopLevel(topLevel), dataDir,
                    "localhost");
            LOG.info("Started HTracedProcess with REST server URL " + htraced.getHttpAddr());
            String str = doGet(new URL("http://" + htraced.getHttpAddr() + "/server/info"));
            // Assert we go something back.
            assertTrue(str.contains("ReleaseVersion"));
            // Assert that the datadir is not empty.
        } finally {
            if (htraced != null) {
                htraced.destroy();
                System.out.println("ExitValue=" + htraced.waitFor());
            }
        }
    }
}