local/elasticsearch-reindex/src/test/java/org/apache/streams/example/elasticsearch/test/ElasticsearchReindexParentChildIT.java

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 * 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
 *
 *   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.
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package org.apache.streams.example.elasticsearch.test;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.google.common.collect.Lists;
import org.apache.commons.io.Charsets;
import org.apache.commons.io.IOUtils;
import org.apache.streams.core.StreamsDatum;
import org.apache.streams.elasticsearch.ElasticsearchConfiguration;
import org.apache.streams.elasticsearch.ElasticsearchPersistWriter;
import org.apache.streams.elasticsearch.ElasticsearchWriterConfiguration;
import org.apache.streams.elasticsearch.example.ElasticsearchReindex;
import org.apache.streams.elasticsearch.example.ElasticsearchReindexConfiguration;
import org.apache.streams.jackson.StreamsJacksonMapper;
import org.apache.streams.pojo.json.Activity;
import org.apache.streams.pojo.json.ActivityObject;
import org.elasticsearch.action.admin.indices.template.put.PutIndexTemplateRequestBuilder;
import org.elasticsearch.test.ElasticsearchIntegrationTest;
import org.junit.Before;
import org.junit.Test;
import org.reflections.Reflections;
import org.reflections.scanners.SubTypesScanner;
import org.reflections.util.ClasspathHelper;
import org.reflections.util.ConfigurationBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.InputStream;
import java.net.URL;
import java.util.List;
import java.util.Set;

/**
 * Test copying parent/child associated documents between two indexes on same cluster
 */
@ElasticsearchIntegrationTest.ClusterScope(scope= ElasticsearchIntegrationTest.Scope.TEST, numNodes=1)
public class ElasticsearchReindexParentChildIT extends ElasticsearchIntegrationTest {

    private final static Logger LOGGER = LoggerFactory.getLogger(ElasticsearchReindexIT.class);

    ObjectMapper MAPPER = StreamsJacksonMapper.getInstance();

    ElasticsearchConfiguration testConfiguration = new ElasticsearchConfiguration();

    @Before
    public void prepareTest() throws Exception {

        testConfiguration = new ElasticsearchConfiguration();
        testConfiguration.setHosts(Lists.newArrayList("localhost"));
        testConfiguration.setClusterName(cluster().getClusterName());

        PutIndexTemplateRequestBuilder putTemplateRequestBuilder = client().admin().indices().preparePutTemplate("mappings");
        URL templateURL = ElasticsearchReindexParentChildIT.class.getResource("/ActivityChildObjectParent.json");
        ObjectNode template = MAPPER.readValue(templateURL, ObjectNode.class);
        String templateSource = MAPPER.writeValueAsString(template);
        putTemplateRequestBuilder.setSource(templateSource);

        client().admin().indices().putTemplate(putTemplateRequestBuilder.request()).actionGet();

        Reflections reflections = new Reflections(new ConfigurationBuilder()
                .setUrls(ClasspathHelper.forPackage("org.apache.streams.pojo.json"))
                .setScanners(new SubTypesScanner()));
        Set<Class<? extends ActivityObject>> objectTypes = reflections.getSubTypesOf(ActivityObject.class);

        ElasticsearchWriterConfiguration setupWriterConfiguration = MAPPER.convertValue(testConfiguration, ElasticsearchWriterConfiguration.class);
        setupWriterConfiguration.setIndex("source");
        setupWriterConfiguration.setBatchSize(5l);

        ElasticsearchPersistWriter setupWriter = new ElasticsearchPersistWriter(setupWriterConfiguration);
        setupWriter.prepare(null);

        for( Class objectType : objectTypes ) {
            Object object = objectType.newInstance();
            ActivityObject activityObject = MAPPER.convertValue(object, ActivityObject.class);
            StreamsDatum datum = new StreamsDatum(activityObject, activityObject.getObjectType());
            datum.getMetadata().put("type", "object");
            setupWriter.write( datum );
        }

        InputStream testActivityFolderStream = ElasticsearchReindexIT.class.getClassLoader()
                .getResourceAsStream("activities");
        List<String> files = IOUtils.readLines(testActivityFolderStream, Charsets.UTF_8);

        for( String file : files) {
            LOGGER.info("File: " + file );
            InputStream testActivityFileStream = ElasticsearchReindexIT.class.getClassLoader()
                    .getResourceAsStream("activities/" + file);
            Activity activity = MAPPER.readValue(testActivityFileStream, Activity.class);
            StreamsDatum datum = new StreamsDatum(activity, activity.getVerb());
            datum.getMetadata().put("parent", activity.getObject().getObjectType());
            datum.getMetadata().put("type", "activity");
            setupWriter.write( datum );
            LOGGER.info("Wrote: " + activity.getVerb() );
        }

        setupWriter.cleanUp();

        flushAndRefresh();

    }

    @Test
    public void testReindex() throws Exception {

        assert(indexExists("source"));
        long srcCount = client().count(client().prepareCount("source").request()).get().getCount();
        assert srcCount > 0;

        ElasticsearchReindexConfiguration reindexConfiguration = MAPPER.readValue(
           ElasticsearchReindexParentChildIT.class.getResourceAsStream("/testReindexParent.json"), ElasticsearchReindexConfiguration.class);

       reindexConfiguration.getDestination().setClusterName(cluster().getClusterName());
       reindexConfiguration.getSource().setClusterName(cluster().getClusterName());

        ElasticsearchReindex reindex = new ElasticsearchReindex(reindexConfiguration);

       Thread reindexThread = new Thread(reindex);
       reindexThread.start();
       reindexThread.join();

       flushAndRefresh();

        ElasticsearchReindexConfiguration reindexConfiguration2 = MAPPER.readValue(
                ElasticsearchReindexParentChildIT.class.getResourceAsStream("/testReindexChild.json"), ElasticsearchReindexConfiguration.class);

        reindexConfiguration2.getDestination().setClusterName(cluster().getClusterName());
        reindexConfiguration2.getSource().setClusterName(cluster().getClusterName());

        ElasticsearchReindex reindex2 = new ElasticsearchReindex(reindexConfiguration2);

        Thread reindexThread2 = new Thread(reindex2);
        reindexThread2.start();
        reindexThread2.join();

        flushAndRefresh();

        assert(indexExists("destination"));

        long destCount = client().count(client().prepareCount("destination").request()).get().getCount();
        assert srcCount == destCount;

    }

}