| /* |
| * 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.tinkerpop.gremlin.driver; |
| |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.TestName; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.log4j.Level; |
| import org.apache.tinkerpop.gremlin.driver.ser.Serializers; |
| import org.apache.tinkerpop.gremlin.structure.Vertex; |
| import org.apache.tinkerpop.gremlin.util.Log4jRecordingAppender; |
| |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ExecutionException; |
| |
| import static org.hamcrest.core.Is.is; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotNull; |
| |
| public class WebSocketClientBehaviorIntegrateTest { |
| @Rule |
| public TestName name = new TestName(); |
| |
| private static final Logger logger = LoggerFactory.getLogger(WebSocketClientBehaviorIntegrateTest.class); |
| private Log4jRecordingAppender recordingAppender = null; |
| private Level previousLogLevel; |
| private SimpleSocketServer server; |
| |
| @Before |
| public void setUp() throws InterruptedException { |
| recordingAppender = new Log4jRecordingAppender(); |
| final org.apache.log4j.Logger rootLogger = org.apache.log4j.Logger.getRootLogger(); |
| if (name.getMethodName().equals("shouldRemoveConnectionFromPoolWhenServerClose_WithPendingRequests") || |
| name.getMethodName().equals("shouldNotCreateReplacementConnectionWhenClientClosesConnection")) { |
| final org.apache.log4j.Logger connectionPoolLogger = org.apache.log4j.Logger.getLogger(ConnectionPool.class); |
| final org.apache.log4j.Logger connectionLogger = org.apache.log4j.Logger.getLogger(Connection.class); |
| previousLogLevel = connectionPoolLogger.getLevel(); |
| connectionPoolLogger.setLevel(Level.DEBUG); |
| connectionLogger.setLevel(Level.DEBUG); |
| } |
| |
| rootLogger.addAppender(recordingAppender); |
| |
| server = new SimpleSocketServer(); |
| server.start(new TestWSGremlinInitializer()); |
| } |
| |
| @After |
| public void shutdown() { |
| server.stop(); |
| |
| // reset logger |
| final org.apache.log4j.Logger rootLogger = org.apache.log4j.Logger.getRootLogger(); |
| |
| if (name.getMethodName().equals("shouldRemoveConnectionFromPoolWhenServerClose_WithPendingRequests") || |
| name.getMethodName().equals("shouldNotCreateReplacementConnectionWhenClientClosesConnection")) { |
| final org.apache.log4j.Logger connectionPoolLogger = org.apache.log4j.Logger.getLogger(ConnectionPool.class); |
| final org.apache.log4j.Logger connectionLogger = org.apache.log4j.Logger.getLogger(Connection.class); |
| connectionPoolLogger.setLevel(previousLogLevel); |
| connectionLogger.setLevel(previousLogLevel); |
| } |
| |
| rootLogger.removeAppender(recordingAppender); |
| } |
| |
| /** |
| * Test a scenario when server closes a connection which does not have any active requests. Such connection |
| * should be destroyed and replaced by another connection on next request. |
| */ |
| @Test |
| public void shouldRemoveConnectionFromPoolWhenServerClose_WithNoPendingRequests() throws InterruptedException { |
| final Cluster cluster = Cluster.build("localhost").port(SimpleSocketServer.PORT) |
| .minConnectionPoolSize(1) |
| .maxConnectionPoolSize(1) |
| .serializer(Serializers.GRAPHSON_V2D0) |
| .create(); |
| final Client.ClusteredClient client = cluster.connect(); |
| |
| // Initialize the client preemptively |
| client.init(); |
| |
| // assert number of connections opened |
| final ConnectionPool channelPool = client.hostConnectionPools.values().stream().findFirst().get(); |
| assertEquals(1, channelPool.getConnectionIDs().size()); |
| |
| final String originalConnectionID = channelPool.getConnectionIDs().iterator().next(); |
| logger.info("On client init ConnectionIDs: " + channelPool.getConnectionIDs()); |
| |
| // trigger the testing server to send a WS close frame |
| Vertex v = client.submit("1", RequestOptions.build() |
| .overrideRequestId(TestWSGremlinInitializer.SINGLE_VERTEX_DELAYED_CLOSE_CONNECTION_REQUEST_ID).create()) |
| .one().getVertex(); |
| |
| assertNotNull(v); |
| |
| // assert connection is not closed yet |
| assertEquals(1, channelPool.getConnectionIDs().size()); |
| |
| // wait for server to send the close WS frame |
| Thread.sleep(6000); |
| |
| // assert that original connection is not part of the connection pool any more |
| assertThat("The original connection should have been closed by the server.", |
| channelPool.getConnectionIDs().contains(originalConnectionID), is(false)); |
| |
| // assert sanity after connection replacement |
| v = client.submit("1", |
| RequestOptions.build().overrideRequestId(TestWSGremlinInitializer.SINGLE_VERTEX_REQUEST_ID).create()) |
| .one().getVertex(); |
| assertNotNull(v); |
| } |
| |
| /** |
| * Tests a scenario when the connection a faulty connection replaced by a new connection. |
| * Ensures that the creation of a new replacement channel only happens once. |
| */ |
| @Test |
| public void shouldRemoveConnectionFromPoolWhenServerClose_WithPendingRequests() throws InterruptedException, ExecutionException { |
| final Cluster cluster = Cluster.build("localhost").port(SimpleSocketServer.PORT) |
| .minConnectionPoolSize(1) |
| .maxConnectionPoolSize(1) |
| .serializer(Serializers.GRAPHSON_V2D0) |
| .create(); |
| |
| final Client.ClusteredClient client = cluster.connect(); |
| |
| // Initialize the client preemptively |
| client.init(); |
| |
| // assert number of connections opened |
| final ConnectionPool channelPool = client.hostConnectionPools.values().stream().findFirst().get(); |
| assertEquals(1, channelPool.getConnectionIDs().size()); |
| |
| // Send two requests in flight. Both should error out. |
| final CompletableFuture<ResultSet> req1 = client.submitAsync("1", RequestOptions.build() |
| .overrideRequestId(TestWSGremlinInitializer.CLOSE_CONNECTION_REQUEST_ID).create()); |
| final CompletableFuture<ResultSet> req2 = client.submitAsync("1", RequestOptions.build() |
| .overrideRequestId(TestWSGremlinInitializer.CLOSE_CONNECTION_REQUEST_ID_2).create()); |
| |
| |
| // assert both are sent on same connection |
| assertEquals(1, channelPool.getConnectionIDs().size()); |
| |
| // trigger write for both requests |
| req1.get(); |
| req2.get(); |
| |
| // wait for close message to arrive from server |
| Thread.sleep(2000); |
| |
| // Assert that we should consider creating a connection only once, since only one connection is being closed. |
| assertEquals(1, recordingAppender.getMessages().stream().filter(str -> str.contains("Considering new connection on")).count()); |
| |
| // assert sanity after connection replacement |
| final Vertex v = client.submit("1", |
| RequestOptions.build().overrideRequestId(TestWSGremlinInitializer.SINGLE_VERTEX_REQUEST_ID).create()) |
| .one().getVertex(); |
| assertNotNull(v); |
| } |
| |
| /** |
| * Tests the scenario when client intentionally closes the connection. In this case, the |
| * connection should not be recycled. |
| */ |
| @Test |
| public void shouldNotCreateReplacementConnectionWhenClientClosesConnection() throws ExecutionException, InterruptedException { |
| final Cluster cluster = Cluster.build("localhost").port(SimpleSocketServer.PORT) |
| .minConnectionPoolSize(1) |
| .maxConnectionPoolSize(1) |
| .serializer(Serializers.GRAPHSON_V2D0) |
| .create(); |
| final Client.ClusteredClient client = cluster.connect(); |
| |
| // Initialize the client preemptively |
| client.init(); |
| |
| // assert number of connections opened |
| final ConnectionPool channelPool = client.hostConnectionPools.values().stream().findFirst().get(); |
| assertEquals(1, channelPool.getConnectionIDs().size()); |
| |
| // close the connection pool in an authentic manner |
| channelPool.closeAsync().get(); |
| |
| // wait for channel closure callback to trigger |
| Thread.sleep(2000); |
| |
| assertEquals("OnClose callback should be called but only once", 1, |
| recordingAppender.getMessages().stream() |
| .filter(str -> str.contains("OnChannelClose callback called for channel")) |
| .count()); |
| |
| assertEquals("No new connection creation should be started", 0, |
| recordingAppender.getMessages().stream() |
| .filter(str -> str.contains("Considering new connection on")) |
| .count()); |
| } |
| } |