/**
* Copyright 2009 the original author or authors.
*
* 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.
*/
package net.sf.katta.protocol;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.endsWith;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import net.sf.katta.AbstractZkTest;
import net.sf.katta.operation.node.NodeOperation;
import net.sf.katta.operation.node.OperationResult;
import org.I0Itec.zkclient.ZkClient;
import org.junit.Test;
public class NodeQueueTest extends AbstractZkTest {
private String getRootPath() {
// this path is cleaned up by ZkSystem!
return _zk.getZkConf().getZkRootPath() + "/queue";
}
@Test(timeout = 15000)
public void testResultMechanism() throws Exception {
final NodeQueue queue = new NodeQueue(_zk.getZkClient(), getRootPath());
NodeOperation nodeOperation = mock(NodeOperation.class);
String elementId = queue.add(nodeOperation);
assertNotNull(queue.peek());
OperationResult result = new OperationResult("ndoe1");
queue.complete(result);
assertNotNull(queue.getResult(elementId, false));
assertNotNull(queue.getResult(elementId, true));
assertNull(queue.getResult(elementId, true));
}
@Test(timeout = 15000)
public void testResultMechanism_DeletingOldResults() throws Exception {
final NodeQueue queue = new NodeQueue(_zk.getZkClient(), getRootPath());
String elementId = "operation-0000000000"; // cheat, we know the internals
assertNull(queue.getResult(elementId, false));
_zk.getZkClient().createPersistent(getRootPath() + "/results/" + elementId, "");
assertNotNull(queue.getResult(elementId, false));
NodeOperation nodeOperation = mock(NodeOperation.class);
queue.add(nodeOperation);
assertNull(queue.getResult(elementId, false));
}
@Test(timeout = 15000)
public void testResultCleanup() throws Exception {
ZkClient zkClientSpy = spy(_zk.getZkClient());
NodeQueue queue = new NodeQueue(zkClientSpy, getRootPath());
NodeOperation nodeOperation = mock(NodeOperation.class);
String elementName = queue.add(nodeOperation);
OperationResult result = new OperationResult("node1");
// cause a unclean state
doThrow(new IllegalStateException("test exception")).when(zkClientSpy).delete(endsWith(elementName));
try {
queue.complete(result);
verify(zkClientSpy).createEphemeral(endsWith(elementName));
fail("should throw exception");
} catch (Exception e) {
// expected
}
// we have now both, a operation and the operation for it
assertEquals(1, queue.getResults().size());
assertFalse(queue.isEmpty());
// this should only be possible if zk connection fails so we try to cleanup
// on queue initialization
queue = new NodeQueue(_zk.getZkClient(), getRootPath());
assertEquals(1, queue.getResults().size());
assertTrue(queue.isEmpty());
}
}