org.apache.whirr.service.ganglia.integration.GangliaServiceTest.java Source code

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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.whirr.service.ganglia.integration;

import com.google.common.collect.Sets;
import junit.framework.TestCase;
import org.apache.commons.configuration.CompositeConfiguration;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.io.IOUtils;
import org.apache.whirr.Cluster;
import org.apache.whirr.Cluster.Instance;
import org.apache.whirr.ClusterController;
import org.apache.whirr.ClusterControllerFactory;
import org.apache.whirr.ClusterSpec;
import org.apache.whirr.RolePredicates;
import org.apache.whirr.TestConstants;
import org.apache.whirr.service.ganglia.GangliaMetadClusterActionHandler;
import org.apache.whirr.service.ganglia.GangliaMonitorClusterActionHandler;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.net.Socket;

import static org.apache.whirr.RolePredicates.anyRoleIn;
import static org.apache.whirr.service.ganglia.GangliaMetadClusterActionHandler.GANGLIA_METAD_ROLE;
import static org.apache.whirr.service.ganglia.GangliaMonitorClusterActionHandler.GANGLIA_MONITOR_ROLE;

public class GangliaServiceTest extends TestCase {

    private ClusterSpec clusterSpec;
    private Cluster cluster;
    private ClusterController controller;

    @Before
    public void setUp() throws Exception {
        CompositeConfiguration config = new CompositeConfiguration();
        if (System.getProperty("config") != null) {
            config.addConfiguration(new PropertiesConfiguration(System.getProperty("config")));
        }
        config.addConfiguration(new PropertiesConfiguration("whirr-ganglia-test.properties"));
        clusterSpec = ClusterSpec.withTemporaryKeys(config);
        controller = new ClusterControllerFactory().create(clusterSpec.getServiceName());

        cluster = controller.launchCluster(clusterSpec);
    }

    @Test(timeout = TestConstants.ITEST_TIMEOUT)
    public void test() throws Exception {
        Instance metad = cluster
                .getInstanceMatching(RolePredicates.role(GangliaMetadClusterActionHandler.GANGLIA_METAD_ROLE));
        String metadHostname = metad.getPublicHostName();

        assertNotNull(metadHostname);
        HttpClient client = new HttpClient();
        GetMethod getIndex = new GetMethod(String.format("http://%s/ganglia/", metadHostname));
        int statusCode = client.executeMethod(getIndex);

        assertEquals("Status code should be 200", HttpStatus.SC_OK, statusCode);
        String indexPageHTML = getIndex.getResponseBodyAsString();
        assertTrue("The string 'Ganglia' should appear on the index page", indexPageHTML.contains("Ganglia"));
        assertTrue("The string 'WhirrGrid' should appear on the index page", indexPageHTML.contains("WhirrGrid"));

        // Now check the xml produced when connecting to the ganglia monitor port on all instances.
        for (Instance instance : cluster.getInstancesMatching(
                anyRoleIn(Sets.<String>newHashSet(GANGLIA_METAD_ROLE, GANGLIA_MONITOR_ROLE)))) {
            testMonitorResponse(instance);
        }
    }

    private void testMonitorResponse(Instance instance) throws IOException {
        Socket s = null;
        try {
            s = new Socket(instance.getPublicAddress(), GangliaMonitorClusterActionHandler.GANGLIA_MONITOR_PORT);
            String gangliaXml = IOUtils.toString(s.getInputStream());
            assertTrue(String.format(
                    "The ganglia monitor output on instance %s with roles %s did not contain 'HOST NAME'",
                    instance.getPublicHostName(), instance.getRoles()), gangliaXml.contains("HOST NAME"));
        } finally {
            if (s != null)
                s.close();
        }
    }

    @After
    public void tearDown() throws IOException, InterruptedException {
        controller.destroyCluster(clusterSpec);
    }

}