/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.smoketest;

import org.apache.lucene.util.LuceneTestCase;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.ESLoggerFactory;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.node.internal.InternalSettingsPreparer;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.nio.file.Path;
import java.util.Locale;
import java.util.concurrent.atomic.AtomicInteger;

import static com.carrotsearch.randomizedtesting.RandomizedTest.randomAsciiOfLength;
import static org.hamcrest.Matchers.notNullValue;

/**
 * {@link ESSmokeClientTestCase} is an abstract base class to run integration
 * tests against an external Elasticsearch Cluster.
 * <p/>
 * You can define a list of transport addresses from where you can reach your cluster
 * by setting "tests.cluster" system property. It defaults to "localhost:9300".
 * <p/>
 * All tests can be run from maven using mvn install as maven will start an external cluster first.
 * <p/>
 * If you want to debug this module from your IDE, then start an external cluster by yourself
 * then run JUnit. If you changed the default port, set "tests.cluster=localhost:PORT" when running
 * your test.
 */
@LuceneTestCase.SuppressSysoutChecks(bugUrl = "we log a lot on purpose")
public abstract class ESSmokeClientTestCase extends LuceneTestCase {

    /**
     * Key used to eventually switch to using an external cluster and provide its transport addresses
     */
    public static final String TESTS_CLUSTER = "tests.cluster";

    /**
     * Defaults to localhost:9300
     */
    public static final String TESTS_CLUSTER_DEFAULT = "localhost:9300";

    protected static final ESLogger logger = ESLoggerFactory.getLogger(ESSmokeClientTestCase.class.getName());

    private static final AtomicInteger counter = new AtomicInteger();
    private static Client client;
    private static String clusterAddresses;
    protected String index;

    private static Client startClient(Path tempDir, TransportAddress... transportAddresses) {
        Settings clientSettings = Settings.settingsBuilder()
                .put("name", "qa_smoke_client_" + counter.getAndIncrement())
                .put(InternalSettingsPreparer.IGNORE_SYSTEM_PROPERTIES_SETTING, true) // prevents any settings to be replaced by system properties.
                .put("client.transport.ignore_cluster_name", true)
                .put("path.home", tempDir)
                .put("node.mode", "network").build(); // we require network here!

        TransportClient.Builder transportClientBuilder = TransportClient.builder().settings(clientSettings);
        TransportClient client = transportClientBuilder.build().addTransportAddresses(transportAddresses);

        logger.info("--> Elasticsearch Java TransportClient started");

        Exception clientException = null;
        try {
            ClusterHealthResponse health = client.admin().cluster().prepareHealth().get();
            logger.info("--> connected to [{}] cluster which is running [{}] node(s).",
                    health.getClusterName(), health.getNumberOfNodes());
        } catch (Exception e) {
            clientException = e;
        }

        assumeNoException("Sounds like your cluster is not running at " + clusterAddresses, clientException);

        return client;
    }

    private static Client startClient() throws UnknownHostException {
        String[] stringAddresses = clusterAddresses.split(",");
        TransportAddress[] transportAddresses = new TransportAddress[stringAddresses.length];
        int i = 0;
        for (String stringAddress : stringAddresses) {
            String[] split = stringAddress.split(":");
            if (split.length < 2) {
                throw new IllegalArgumentException("address [" + clusterAddresses + "] not valid");
            }
            try {
                transportAddresses[i++] = new InetSocketTransportAddress(InetAddress.getByName(split[0]), Integer.valueOf(split[1]));
            } catch (NumberFormatException e) {
                throw new IllegalArgumentException("port is not valid, expected number but was [" + split[1] + "]");
            }
        }
        return startClient(createTempDir(), transportAddresses);
    }

    public static Client getClient() {
        if (client == null) {
            try {
                client = startClient();
            } catch (UnknownHostException e) {
                logger.error("can not start the client", e);
            }
            assertThat(client, notNullValue());
        }
        return client;
    }

    @BeforeClass
    public static void initializeSettings() throws UnknownHostException {
        clusterAddresses = System.getProperty(TESTS_CLUSTER);
        if (clusterAddresses == null || clusterAddresses.isEmpty()) {
            clusterAddresses = TESTS_CLUSTER_DEFAULT;
            logger.info("[{}] not set. Falling back to [{}]", TESTS_CLUSTER, TESTS_CLUSTER_DEFAULT);
        }
    }

    @AfterClass
    public static void stopTransportClient() {
        if (client != null) {
            client.close();
            client = null;
        }
    }

    @Before
    public void defineIndexName() {
        doClean();
        index = "qa-smoke-test-client-" + randomAsciiOfLength(10).toLowerCase(Locale.getDefault());
    }

    @After
    public void cleanIndex() {
        doClean();
    }

    private void doClean() {
        if (client != null) {
            try {
                client.admin().indices().prepareDelete(index).get();
            } catch (Exception e) {
                // We ignore this cleanup exception
            }
        }
    }

}

@@ -1945,25 +1945,24 @@
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Fix straggler in qa tests