/**
* 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.component.zookeeper;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.apache.camel.Exchange;
import org.apache.camel.InvalidPayloadException;
import org.apache.camel.Message;
import org.apache.camel.NoSuchHeaderException;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.component.zookeeper.NaturalSortComparator.Order;
import org.apache.camel.util.ExchangeHelper;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.data.Stat;
import org.junit.Test;
public class ConsumeChildrenTest extends ZooKeeperTestSupport {
@Override
protected RouteBuilder[] createRouteBuilders() throws Exception {
return new RouteBuilder[] {new RouteBuilder() {
public void configure() throws Exception {
from("zookeeper://localhost:" + getServerPort() + "/grimm?repeat=true&listChildren=true")
.sort(body(), new NaturalSortComparator(Order.Descending))
.to("mock:zookeeper-data");
}
}};
}
@Test
public void shouldAwaitCreationAndGetDataNotification() throws Exception {
MockEndpoint mock = getMockEndpoint("mock:zookeeper-data");
mock.expectedMessageCount(5);
client.createPersistent("/grimm", "parent");
client.create("/grimm/hansel", "child");
client.create("/grimm/gretel", "child");
client.delete("/grimm/hansel");
client.delete("/grimm/gretel");
mock.await(5, TimeUnit.SECONDS);
mock.assertIsSatisfied();
validateExchangesContainListings(mock, createChildListing(), createChildListing("hansel"), createChildListing("hansel", "gretel"), createChildListing("gretel"),
createChildListing());
}
private void validateExchangesContainListings(MockEndpoint mock, List<?>... expected) throws InvalidPayloadException, NoSuchHeaderException {
int index = 0;
for (Exchange received : mock.getReceivedExchanges()) {
Watcher.Event.EventType expectedEvent;
if (index == 0) {
expectedEvent = Watcher.Event.EventType.NodeCreated;
} else {
expectedEvent = Watcher.Event.EventType.NodeChildrenChanged;
}
List<?> actual = received.getIn().getMandatoryBody(List.class);
assertEquals(expected[index++], actual);
assertEquals(expectedEvent, ExchangeHelper.getMandatoryHeader(received, ZooKeeperMessage.ZOOKEEPER_EVENT_TYPE, Watcher.Event.EventType.class));
validateChildrenCountChangesEachTime(mock);
}
}
protected void validateChildrenCountChangesEachTime(MockEndpoint mock) {
int lastChildCount = -1;
List<Exchange> received = mock.getReceivedExchanges();
for (int x = 0; x < received.size(); x++) {
Message zkm = mock.getReceivedExchanges().get(x).getIn();
int childCount = ((Stat)zkm.getHeader(ZooKeeperMessage.ZOOKEEPER_STATISTICS)).getNumChildren();
assertNotSame("Num of children did not change", lastChildCount, childCount);
lastChildCount = childCount;
}
}
}