Java tutorial
/* * 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.impl; 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.client.solrj.SolrClient; import org.apache.solr.client.solrj.request.CollectionAdminRequest; import org.apache.solr.cloud.SolrCloudTestCase; import org.apache.solr.SolrTestCaseJ4.SuppressSSL; 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, HttpSolrClient.cacheKey); 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, HttpSolrClient.cacheKey); return mConn; } }