org.apache.whirr.service.elasticsearch.integration.ElasticSearchTest.java Source code

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Here is the source code for org.apache.whirr.service.elasticsearch.integration.ElasticSearchTest.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.whirr.service.elasticsearch.integration;

import com.google.common.collect.Iterables;
import org.apache.commons.configuration.CompositeConfiguration;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.whirr.Cluster;
import org.apache.whirr.ClusterController;
import org.apache.whirr.ClusterSpec;
import org.apache.whirr.TestConstants;
import org.apache.whirr.service.elasticsearch.ElasticSearchHandler;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static org.apache.whirr.RolePredicates.role;

public class ElasticSearchTest {

    private static final Logger LOG = LoggerFactory.getLogger(ElasticSearchHandler.class);

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

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

    @Test(timeout = TestConstants.ITEST_TIMEOUT)
    public void testCheckNumberOfNodes() throws Exception {
        for (int i = 0; i < 20; i++) {
            int nodes = getNumberOfNodes();
            LOG.info("{}/{} nodes joined the elasticsearch cluster", nodes, cluster.getInstances().size());
            if (nodes == cluster.getInstances().size()) {
                return;
            }
            try {
                Thread.sleep(5000);
            } catch (InterruptedException e) {
            }
        }
        throw new Exception("All nodes did not joined the cluster as expected");
    }

    private int getNumberOfNodes() throws Exception {
        String healthInfo = getHealthInfo();
        Pattern nodesPattern = Pattern.compile("\".*number_of_nodes\":(\\d+).*");
        Matcher matcher = nodesPattern.matcher(healthInfo);
        if (matcher.find()) {
            return Integer.parseInt(matcher.group(1));
        }
        return 0;
    }

    private String getHealthInfo() throws Exception {
        for (int i = 0; i < 20; i++) {
            try {
                Cluster.Instance instance = Iterables
                        .get(cluster.getInstancesMatching(role(ElasticSearchHandler.ROLE)), 0);
                String address = instance.getPublicAddress().getHostAddress();

                URL url = new URL(String.format("http://%s:9200/_cluster/health", address));
                BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));

                StringBuilder builder = new StringBuilder();
                String line;
                while ((line = in.readLine()) != null) {
                    builder.append(line);
                }
                in.close();
                return builder.toString();

            } catch (IOException e) {
                try {
                    Thread.sleep(5000);
                } catch (InterruptedException e1) {
                }
            }
        }
        throw new Exception("Unable to get cluster health info.");
    }

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

}