org.apache.solr.client.solrj.ConnectionReuseTest.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.solr.client.solrj;

import java.io.IOException;
import java.net.URL;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.http.HttpClientConnection;
import org.apache.http.HttpConnectionMetrics;
import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.conn.ConnectionPoolTimeoutException;
import org.apache.http.conn.ConnectionRequest;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicHttpRequest;
import org.apache.solr.SolrTestCaseJ4.SuppressSSL;
import org.apache.solr.client.solrj.impl.CloudSolrClient;
import org.apache.solr.client.solrj.impl.ConcurrentUpdateSolrClient;
import org.apache.solr.client.solrj.impl.HttpClientUtil;
import org.apache.solr.client.solrj.request.CollectionAdminRequest;
import org.apache.solr.cloud.SolrCloudTestCase;
import org.apache.solr.common.cloud.DocCollection;
import org.apache.solr.update.AddUpdateCommand;
import org.apache.solr.util.TestInjection;
import org.junit.BeforeClass;
import org.junit.Test;

@SuppressSSL
public class ConnectionReuseTest extends SolrCloudTestCase {

    private AtomicInteger id = new AtomicInteger();
    private HttpClientContext context = HttpClientContext.create();

    private static final String COLLECTION = "collection1";

    @BeforeClass
    public static void setupCluster() throws Exception {
        TestInjection.failUpdateRequests = "true:100";
        configureCluster(1)
                .addConfig("config", TEST_PATH().resolve("configsets").resolve("cloud-minimal").resolve("conf"))
                .configure();

        CollectionAdminRequest.createCollection(COLLECTION, "config", 1, 1).processAndWait(cluster.getSolrClient(),
                DEFAULT_TIMEOUT);

        cluster.getSolrClient().waitForState(COLLECTION, DEFAULT_TIMEOUT, TimeUnit.SECONDS,
                (n, c) -> DocCollection.isFullyActive(n, c, 1, 1));
    }

    private SolrClient buildClient(CloseableHttpClient httpClient, URL url) {
        switch (random().nextInt(3)) {
        case 0:
            // currently only testing with 1 thread
            return getConcurrentUpdateSolrClient(url.toString() + "/" + COLLECTION, httpClient, 6, 1);
        case 1:
            return getHttpSolrClient(url.toString() + "/" + COLLECTION, httpClient);
        case 2:
            CloudSolrClient client = getCloudSolrClient(cluster.getZkServer().getZkAddress(),
                    random().nextBoolean(), httpClient);
            client.setParallelUpdates(random().nextBoolean());
            client.setDefaultCollection(COLLECTION);
            client.getLbClient().setConnectionTimeout(30000);
            client.getLbClient().setSoTimeout(60000);
            return client;
        }
        throw new RuntimeException("impossible");
    }

    @Test
    public void testConnectionReuse() throws Exception {

        URL url = cluster.getJettySolrRunners().get(0).getBaseUrl();
        PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();

        CloseableHttpClient httpClient = HttpClientUtil.createClient(null, cm);
        try (SolrClient client = buildClient(httpClient, url)) {

            HttpHost target = new HttpHost(url.getHost(), url.getPort(), isSSLMode() ? "https" : "http");
            HttpRoute route = new HttpRoute(target);

            ConnectionRequest mConn = getClientConnectionRequest(httpClient, route, cm);

            HttpClientConnection conn1 = getConn(mConn);
            headerRequest(target, route, conn1, cm);

            cm.releaseConnection(conn1, null, -1, TimeUnit.MILLISECONDS);

            int queueBreaks = 0;
            int cnt1 = atLeast(3);
            int cnt2 = atLeast(30);
            for (int j = 0; j < cnt1; j++) {
                boolean done = false;
                for (int i = 0; i < cnt2; i++) {
                    AddUpdateCommand c = new AddUpdateCommand(null);
                    c.solrDoc = sdoc("id", id.incrementAndGet());
                    try {
                        client.add(c.solrDoc);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    if (!done && i > 0 && i < cnt2 - 1 && client instanceof ConcurrentUpdateSolrClient
                            && random().nextInt(10) > 8) {
                        queueBreaks++;
                        done = true;
                        Thread.sleep(350); // wait past streaming client poll time of 250ms
                    }
                }
                if (client instanceof ConcurrentUpdateSolrClient) {
                    ((ConcurrentUpdateSolrClient) client).blockUntilFinished();
                }
            }

            route = new HttpRoute(new HttpHost(url.getHost(), url.getPort(), isSSLMode() ? "https" : "http"));

            mConn = cm.requestConnection(route, null);

            HttpClientConnection conn2 = getConn(mConn);

            HttpConnectionMetrics metrics = conn2.getMetrics();
            headerRequest(target, route, conn2, cm);

            cm.releaseConnection(conn2, null, -1, TimeUnit.MILLISECONDS);

            assertNotNull(
                    "No connection metrics found - is the connection getting aborted? server closing the connection? "
                            + client.getClass().getSimpleName(),
                    metrics);

            // we try and make sure the connection we get has handled all of the requests in this test
            if (client instanceof ConcurrentUpdateSolrClient) {
                // we can't fully control queue polling breaking up requests - allow a bit of leeway
                int exp = cnt1 + queueBreaks + 2;
                assertTrue(
                        "We expected all communication via streaming client to use one connection! expected=" + exp
                                + " got=" + metrics.getRequestCount(),
                        Math.max(exp, metrics.getRequestCount()) - Math.min(exp, metrics.getRequestCount()) < 3);
            } else {
                assertTrue("We expected all communication to use one connection! "
                        + client.getClass().getSimpleName() + " " + metrics.getRequestCount(),
                        cnt1 * cnt2 + 2 <= metrics.getRequestCount());
            }

        } finally {
            HttpClientUtil.close(httpClient);
        }
    }

    public HttpClientConnection getConn(ConnectionRequest mConn)
            throws InterruptedException, ConnectionPoolTimeoutException, ExecutionException {
        HttpClientConnection conn = mConn.get(30, TimeUnit.SECONDS);

        return conn;
    }

    public void headerRequest(HttpHost target, HttpRoute route, HttpClientConnection conn,
            PoolingHttpClientConnectionManager cm) throws IOException, HttpException {
        HttpRequest req = new BasicHttpRequest("OPTIONS", "*", HttpVersion.HTTP_1_1);

        req.addHeader("Host", target.getHostName());
        if (!conn.isOpen()) {
            // establish connection based on its route info
            cm.connect(conn, route, 1000, context);
            // and mark it as route complete
            cm.routeComplete(conn, route, context);
        }
        conn.sendRequestHeader(req);
        conn.flush();
        conn.receiveResponseHeader();
    }

    public ConnectionRequest getClientConnectionRequest(HttpClient httpClient, HttpRoute route,
            PoolingHttpClientConnectionManager cm) {
        ConnectionRequest mConn = cm.requestConnection(route, null);
        return mConn;
    }

}