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Ben McDonie
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137 changes: 137 additions & 0 deletions
137
...nt/src/test/java/com/mesosphere/mesos/rx/java/MesosClientBackpressureIntegrationTest.java
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| /* | ||
| * Copyright (C) 2016 Mesosphere, Inc | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
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|
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| package com.mesosphere.mesos.rx.java; | ||
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| import com.mesosphere.mesos.rx.java.test.StringMessageCodec; | ||
| import com.mesosphere.mesos.rx.java.util.UserAgentEntries; | ||
| import io.netty.buffer.ByteBuf; | ||
| import io.netty.handler.codec.http.HttpResponseStatus; | ||
| import io.reactivex.netty.RxNetty; | ||
| import io.reactivex.netty.protocol.http.server.HttpServer; | ||
| import io.reactivex.netty.protocol.http.server.HttpServerResponse; | ||
| import io.reactivex.netty.protocol.http.server.RequestHandler; | ||
| import org.junit.Ignore; | ||
| import org.junit.Rule; | ||
| import org.junit.Test; | ||
| import org.junit.rules.Timeout; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import rx.exceptions.MissingBackpressureException; | ||
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|
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| import java.net.URI; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.TimeUnit; | ||
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| import static org.assertj.core.api.Assertions.assertThat; | ||
| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.Assert.fail; | ||
|
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| public final class MesosClientBackpressureIntegrationTest { | ||
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| private static final Logger LOGGER = LoggerFactory.getLogger(MesosClientBackpressureIntegrationTest.class); | ||
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| static int msgNo = 0; | ||
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| @Rule | ||
| public Timeout timeoutRule = new Timeout(10_000, TimeUnit.MILLISECONDS); | ||
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| @Test | ||
| @Ignore | ||
| public void testBurstyObservable_missingBackpressureException() throws Throwable { | ||
| final String subscribedMessage = "{\"type\": \"SUBSCRIBED\",\"subscribed\": {\"framework_id\": {\"value\":\"12220-3440-12532-2345\"},\"heartbeat_interval_seconds\":15.0}"; | ||
| final String heartbeatMessage = "{\"type\":\"HEARTBEAT\"}"; | ||
| final byte[] hmsg = heartbeatMessage.getBytes(StandardCharsets.UTF_8); | ||
| final byte[] hbytes = String.format("%d\n", heartbeatMessage.getBytes().length).getBytes(StandardCharsets.UTF_8); | ||
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| final RequestHandler<ByteBuf, ByteBuf> handler = (request, response) -> { | ||
| response.setStatus(HttpResponseStatus.OK); | ||
| response.getHeaders().setHeader("Content-Type", "text/plain;charset=utf-8"); | ||
| writeRecordIOMessage(response, subscribedMessage); | ||
| for (int i = 0; i < 20000; i++) { | ||
| response.writeBytes(hbytes); | ||
| response.writeBytes(hmsg); | ||
| } | ||
| return response.flush(); | ||
| }; | ||
| final HttpServer<ByteBuf, ByteBuf> server = RxNetty.createHttpServer(0, handler); | ||
| server.start(); | ||
| final URI uri = URI.create(String.format("http://localhost:%d/api/v1/scheduler", server.getServerPort())); | ||
| final MesosClient<String, String> client = createClientForStreaming(uri).build(); | ||
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| try { | ||
| client.openStream().await(); | ||
| fail("Expect an exception to be propagated up due to backpressure"); | ||
| } catch (MissingBackpressureException e) { | ||
| // expected | ||
| e.printStackTrace(); | ||
| assertThat(e.getMessage()).isNullOrEmpty(); | ||
| } finally { | ||
| server.shutdown(); | ||
| } | ||
| } | ||
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| @Test | ||
| public void testBurstyObservable_unboundedBufferSucceeds() throws Throwable { | ||
| msgNo = 0; | ||
| final int numMessages = 20000; | ||
| final String subscribedMessage = "{\"type\": \"SUBSCRIBED\",\"subscribed\": {\"framework_id\": {\"value\":\"12220-3440-12532-2345\"},\"heartbeat_interval_seconds\":15.0}"; | ||
| final String heartbeatMessage = "{\"type\":\"HEARTBEAT\"}"; | ||
| final RequestHandler<ByteBuf, ByteBuf> handler = (request, response) -> { | ||
| response.setStatus(HttpResponseStatus.OK); | ||
| response.getHeaders().setHeader("Content-Type", "text/plain;charset=utf-8"); | ||
| writeRecordIOMessage(response, subscribedMessage); | ||
| for (int i = 0; i < numMessages; i++) { | ||
| writeRecordIOMessage(response, heartbeatMessage); | ||
| } | ||
| return response.close(); | ||
| }; | ||
| final HttpServer<ByteBuf, ByteBuf> server = RxNetty.createHttpServer(0, handler); | ||
| server.start(); | ||
| final URI uri = URI.create(String.format("http://localhost:%d/api/v1/scheduler", server.getServerPort())); | ||
| final MesosClient<String, String> client = createClientForStreaming(uri) | ||
| .onBackpressureBuffer() | ||
| .build(); | ||
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| try { | ||
| client.openStream().await(); | ||
| } finally { | ||
| // 20000 heartbeats PLUS 1 subscribe | ||
| assertEquals("All heartbeats received (plus the subscribed)", 1 + numMessages, msgNo); | ||
| server.shutdown(); | ||
| } | ||
| } | ||
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| private void writeRecordIOMessage(HttpServerResponse<ByteBuf> response, String msg) { | ||
| response.writeBytesAndFlush(String.format("%d\n", msg.getBytes().length).getBytes(StandardCharsets.UTF_8)); | ||
| response.writeBytesAndFlush(msg.getBytes(StandardCharsets.UTF_8)); | ||
| } | ||
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| private static MesosClientBuilder<String, String> createClientForStreaming(final URI uri) { | ||
| return MesosClientBuilder.<String, String>newBuilder() | ||
| .sendCodec(StringMessageCodec.UTF8_STRING) | ||
| .receiveCodec(StringMessageCodec.UTF8_STRING) | ||
| .mesosUri(uri) | ||
| .applicationUserAgentEntry(UserAgentEntries.literal("test", "test")) | ||
| .processStream(events -> | ||
| events | ||
| .doOnNext(e -> LOGGER.debug(++msgNo + " : " + e)) | ||
| .map(e -> Optional.empty())) | ||
| .subscribe("subscribe"); | ||
| } | ||
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| } |
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