| /** |
| * 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.camel.processor; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.camel.ContextTestSupport; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.ProducerTemplate; |
| import org.apache.camel.builder.RouteBuilder; |
| import org.apache.camel.component.direct.DirectEndpoint; |
| import org.apache.camel.component.mock.MockEndpoint; |
| |
| /** |
| * @version |
| */ |
| public class SamplingThrottlerTest extends ContextTestSupport { |
| |
| public void testSamplingFromExchangeStream() throws Exception { |
| MockEndpoint mock = getMockEndpoint("mock:result"); |
| mock.expectedMessageCount(2); |
| mock.setResultWaitTime(3000); |
| |
| List<Exchange> sentExchanges = new ArrayList<Exchange>(); |
| sendExchangesThroughDroppingThrottler(sentExchanges, 15); |
| |
| mock.assertIsSatisfied(); |
| validateDroppedExchanges(sentExchanges, 2); |
| } |
| |
| public void testBurstySampling() throws Exception { |
| MockEndpoint mock = getMockEndpoint("mock:result"); |
| mock.expectedMessageCount(2); |
| mock.setResultWaitTime(3000); |
| |
| List<Exchange> sentExchanges = new ArrayList<Exchange>(); |
| |
| // send a burst of 5 exchanges, expecting only one to get through |
| sendExchangesThroughDroppingThrottler(sentExchanges, 5); |
| // sleep through a complete period |
| Thread.sleep(1100); |
| // send another 5 now |
| sendExchangesThroughDroppingThrottler(sentExchanges, 5); |
| |
| mock.assertIsSatisfied(); |
| validateDroppedExchanges(sentExchanges, 2); |
| } |
| |
| public void testSendLotsOfMessagesSimultaneouslyButOnly3GetThrough() throws Exception { |
| MockEndpoint mock = getMockEndpoint("mock:result"); |
| mock.expectedMessageCount(3); |
| mock.setResultWaitTime(4000); |
| |
| final List<Exchange> sentExchanges = Collections.synchronizedList(new ArrayList<Exchange>()); |
| ExecutorService executor = Executors.newFixedThreadPool(5); |
| for (int i = 0; i < 5; i++) { |
| executor.execute(new Runnable() { |
| public void run() { |
| try { |
| sendExchangesThroughDroppingThrottler(sentExchanges, 35); |
| } catch (Exception e) { |
| // ignore |
| } |
| } |
| }); |
| } |
| |
| mock.assertIsSatisfied(); |
| executor.shutdownNow(); |
| } |
| |
| public void testSamplingUsingmessageFrequency() throws Exception { |
| long totalMessages = 100; |
| MockEndpoint mock = getMockEndpoint("mock:result"); |
| mock.expectedMessageCount(10); |
| mock.setResultWaitTime(100); |
| |
| for (int i = 0; i < totalMessages; i++) { |
| template.sendBody("direct:sample-messageFrequency", "<message>" + i + "</message>"); |
| } |
| |
| mock.assertIsSatisfied(); |
| } |
| |
| public void testSamplingUsingmessageFrequencyViaDSL() throws Exception { |
| long totalMessages = 50; |
| MockEndpoint mock = getMockEndpoint("mock:result"); |
| mock.expectedMessageCount(10); |
| mock.setResultWaitTime(100); |
| |
| for (int i = 0; i < totalMessages; i++) { |
| template.sendBody("direct:sample-messageFrequency-via-dsl", "<message>" + i + "</message>"); |
| } |
| |
| mock.assertIsSatisfied(); |
| } |
| |
| private void sendExchangesThroughDroppingThrottler(List<Exchange> sentExchanges, int messages) throws Exception { |
| ProducerTemplate myTemplate = context.createProducerTemplate(); |
| |
| DirectEndpoint targetEndpoint = resolveMandatoryEndpoint("direct:sample", DirectEndpoint.class); |
| for (int i = 0; i < messages; i++) { |
| Exchange e = targetEndpoint.createExchange(); |
| e.getIn().setBody("<message>" + i + "</message>"); |
| // only send if we are still started |
| if (context.getStatus().isStarted()) { |
| myTemplate.send(targetEndpoint, e); |
| sentExchanges.add(e); |
| Thread.sleep(100); |
| } |
| } |
| myTemplate.stop(); |
| } |
| |
| private void validateDroppedExchanges(List<Exchange> sentExchanges, int expectedNotDroppedCount) { |
| int notDropped = 0; |
| for (Exchange e : sentExchanges) { |
| Boolean stopped = e.getProperty(Exchange.ROUTE_STOP, Boolean.class); |
| if (stopped == null) { |
| notDropped++; |
| } |
| } |
| assertEquals(expectedNotDroppedCount, notDropped); |
| } |
| |
| protected RouteBuilder createRouteBuilder() { |
| return new RouteBuilder() { |
| public void configure() { |
| // START SNIPPET: e1 |
| from("direct:sample") |
| .sample() |
| .to("mock:result"); |
| |
| from("direct:sample-configured") |
| .sample(1, TimeUnit.SECONDS) |
| .to("mock:result"); |
| |
| from("direct:sample-configured-via-dsl") |
| .sample().samplePeriod(1).timeUnits(TimeUnit.SECONDS) |
| .to("mock:result"); |
| |
| from("direct:sample-messageFrequency") |
| .sample(10) |
| .to("mock:result"); |
| |
| from("direct:sample-messageFrequency-via-dsl") |
| .sample().sampleMessageFrequency(5) |
| .to("mock:result"); |
| |
| // END SNIPPET: e1 |
| } |
| }; |
| } |
| } |