/**
* 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.NotifyBuilder;
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 {
NotifyBuilder notify = new NotifyBuilder(context).whenDone(15).create();
MockEndpoint mock = getMockEndpoint("mock:result");
mock.expectedMinimumMessageCount(2);
mock.setResultWaitTime(3000);
List<Exchange> sentExchanges = new ArrayList<Exchange>();
sendExchangesThroughDroppingThrottler(sentExchanges, 15);
notify.matchesMockWaitTime();
mock.assertIsSatisfied();
validateDroppedExchanges(sentExchanges, mock.getReceivedCounter());
}
public void testBurstySampling() throws Exception {
NotifyBuilder notify = new NotifyBuilder(context).whenDone(5).create();
MockEndpoint mock = getMockEndpoint("mock:result");
mock.expectedMinimumMessageCount(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);
notify.matchesMockWaitTime();
mock.assertIsSatisfied();
validateDroppedExchanges(sentExchanges, mock.getReceivedCounter());
}
public void testSendLotsOfMessagesSimultaneouslyButOnly3GetThrough() throws Exception {
MockEndpoint mock = getMockEndpoint("mock:result");
mock.expectedMinimumMessageCount(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.expectedMinimumMessageCount(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.expectedMinimumMessageCount(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
}
};
}
}