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Issue 148: "Stuck client" may not be detected in case of non-open soc…
…ket (#164) * Issue 148: 'Stuck client' may not be detected in case of non-open socket Co-authored-by: Enrico Olivelli <enrico.olivelli@diennea.com>
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86 changes: 86 additions & 0 deletions
86
...core/src/test/java/blazingcache/client/ApparentlyStuckClientDueToServerSideErrorTest.java
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| @@ -0,0 +1,86 @@ | ||
| /* | ||
| * Licensed to Diennea S.r.l. under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. Diennea S.r.l. 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 blazingcache.client; | ||
|
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| import blazingcache.network.ServerHostData; | ||
| import blazingcache.network.netty.NettyCacheServerLocator; | ||
| import blazingcache.server.CacheServer; | ||
| import java.nio.charset.StandardCharsets; | ||
| import static org.junit.Assert.assertNotNull; | ||
| import static org.junit.Assert.assertNull; | ||
| import org.junit.Test; | ||
| import static org.junit.Assert.assertTrue; | ||
| import blazingcache.network.Message; | ||
| import blazingcache.network.netty.NettyChannel; | ||
| import blazingcache.server.CacheServerSideConnection; | ||
| import java.util.concurrent.atomic.AtomicReference; | ||
|
|
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| public class ApparentlyStuckClientDueToServerSideErrorTest { | ||
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| @Test | ||
| public void test() throws Exception { | ||
| byte[] data = "testdata".getBytes(StandardCharsets.UTF_8); | ||
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| ServerHostData serverHostData = new ServerHostData("localhost", 1234, "test", false, null); | ||
| try ( CacheServer cacheServer = new CacheServer("ciao", serverHostData)) { | ||
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| cacheServer.setSlowClientTimeout(10000); | ||
| cacheServer.start(); | ||
| AtomicReference<CacheClient> _client2 = new AtomicReference<>(); | ||
| try ( CacheClient client1 = new CacheClient("theClient1", "ciao", new NettyCacheServerLocator(serverHostData)); CacheClient client2 = new CacheClient("theClient2", "ciao", | ||
| new NettyCacheServerLocator(serverHostData)) { | ||
| @Override | ||
| public void messageReceived(Message message) { | ||
| // swallow every message | ||
| // client2 will not answer to the "invaliate" message | ||
| // client1 has to wait until the server declares client2 dead | ||
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| // simulate a network error, only on the server side part | ||
| CacheServerSideConnection serverSideConnectionPeer2 = cacheServer.getAcceptor().getClientConnections().get(_client2.get().getClientId()); | ||
| // we are sure that we are using the NettyChannel, not JVMChannel | ||
| NettyChannel channel = (NettyChannel) serverSideConnectionPeer2.getChannel(); | ||
| channel.exceptionCaught(new Exception("dummy unpredictable error")); | ||
| } | ||
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| };) { | ||
| _client2.set(client2); | ||
| client1.start(); | ||
| client2.start(); | ||
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| assertTrue(client1.waitForConnection(10000)); | ||
| assertTrue(client2.waitForConnection(10000)); | ||
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| client1.load("foo", data, 0); | ||
| assertNotNull(client2.fetch("foo")); | ||
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| client1.invalidate("foo"); | ||
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| assertNull(client1.get("foo")); | ||
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| // client2 does not know that the server had problems and it still holds a copy of the value | ||
| assertNotNull(client2.get("foo")); | ||
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| } | ||
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| } | ||
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| } | ||
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| } |
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