/**
* 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.Arrays;
import java.util.List;
import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.impl.ThrottlingExceptionHalfOpenHandler;
import org.apache.camel.impl.ThrottlingExceptionRoutePolicy;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ThrottlingExceptionRoutePolicyTest extends ContextTestSupport {
private static Logger log = LoggerFactory.getLogger(ThrottlingExceptionRoutePolicyTest.class);
private String url = "seda:foo?concurrentConsumers=20";
private MockEndpoint result;
private int size = 100;
@Before
public void setUp() throws Exception {
super.setUp();
this.setUseRouteBuilder(true);
result = getMockEndpoint("mock:result");
context.getShutdownStrategy().setTimeout(1);
}
@Test
public void testThrottlingRoutePolicyClosed() throws Exception {
result.expectedMinimumMessageCount(size);
for (int i = 0; i < size; i++) {
template.sendBody(url, "Message " + i);
Thread.sleep(3);
}
assertMockEndpointsSatisfied();
}
@Test
public void testOpenCircuitToPreventMessageThree() throws Exception {
result.reset();
result.expectedMessageCount(2);
List<String> bodies = Arrays.asList(new String[]{"Message One", "Message Two"});
result.expectedBodiesReceivedInAnyOrder(bodies);
result.whenAnyExchangeReceived(new Processor() {
@Override
public void process(Exchange exchange) throws Exception {
String msg = exchange.getIn().getBody(String.class);
exchange.setException(new ThrottlingException(msg));
}
});
// send two messages which will fail
template.sendBody(url, "Message One");
template.sendBody(url, "Message Two");
// wait long enough to
// have the route shutdown
Thread.sleep(3000);
// send more messages
// but never should get there
// due to open circuit
log.debug("sending message three");
template.sendBody(url, "Message Three");
Thread.sleep(2000);
assertMockEndpointsSatisfied();
}
@Override
protected RouteBuilder createRouteBuilder() throws Exception {
return new RouteBuilder() {
@Override
public void configure() throws Exception {
int threshold = 2;
long failureWindow = 30;
long halfOpenAfter = 5000;
ThrottlingExceptionRoutePolicy policy = new ThrottlingExceptionRoutePolicy(threshold, failureWindow, halfOpenAfter, null);
policy.setHalfOpenHandler(new NeverCloseHandler());
from(url)
.routePolicy(policy)
.log("${body}")
.to("log:foo?groupSize=10")
.to("mock:result");
}
};
}
public class NeverCloseHandler implements ThrottlingExceptionHalfOpenHandler {
@Override
public boolean isReadyToBeClosed() {
return false;
}
}
}