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/*
* 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.zookeeper;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.test.ClientBase;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
public class GetEphemeralsTest extends ClientBase {
private static final String BASE = "/base";
private static final int PERSISTENT_CNT = 2;
private static final int EPHEMERAL_CNT = 2;
private static final String NEWLINE = System.getProperty("line.separator");
private String[] expected;
private ZooKeeper zk;
@BeforeEach
@Override
public void setUp() throws Exception {
super.setUp();
zk = createClient();
expected = generatePaths(PERSISTENT_CNT, EPHEMERAL_CNT);
}
@AfterEach
@Override
public void tearDown() throws Exception {
super.tearDown();
zk.close();
}
@Test
public void testGetEphemeralsSync() throws KeeperException, InterruptedException {
List<String> actual = zk.getEphemerals();
assertEquals(actual.size(), expected.length, "Expected ephemeral count for allPaths");
for (int i = 0; i < expected.length; i++) {
String path = expected[i];
assertTrue(actual.contains(path), String.format("Path=%s exists in get All Ephemerals list ", path));
}
}
@Test
public void testGetEphemeralsSyncByPath() throws KeeperException, InterruptedException {
final String prefixPath = BASE + 0;
List<String> actual = zk.getEphemerals(prefixPath);
assertEquals(actual.size(), EPHEMERAL_CNT, "Expected ephemeral count for allPaths");
for (int i = 0; i < EPHEMERAL_CNT; i++) {
String path = expected[i];
assertTrue(actual.contains(path), String.format("Path=%s exists in getEphemerals(%s) list ", path, prefixPath));
}
}
@Test
public void testGetEphemerals() throws IOException, KeeperException, InterruptedException {
final CountDownLatch doneProcessing = new CountDownLatch(1);
final List<String> unexpectedBehavior = new ArrayList<>();
zk.getEphemerals((rc, ctx, paths) -> {
if (paths == null) {
unexpectedBehavior.add(String.format("Expected ephemeral count for"
+ " allPaths to be %d but was null", expected.length));
} else if (paths.size() != expected.length) {
unexpectedBehavior.add(String.format("Expected ephemeral count for allPaths to be %d but was %d", expected.length, paths.size()));
}
for (int i = 0; i < expected.length; i++) {
String path = expected[i];
if (!paths.contains(path)) {
unexpectedBehavior.add(String.format("Path=%s exists in getEphemerals list ", path));
}
}
doneProcessing.countDown();
}, null);
long waitForCallbackSecs = 2L;
if (!doneProcessing.await(waitForCallbackSecs, TimeUnit.SECONDS)) {
fail(String.format("getEphemerals didn't callback within %d seconds", waitForCallbackSecs));
}
checkForUnexpectedBehavior(unexpectedBehavior);
}
@Test
public void testGetEphemeralsByPath() throws IOException, KeeperException, InterruptedException {
final CountDownLatch doneProcessing = new CountDownLatch(1);
final String checkPath = BASE + "0";
final List<String> unexpectedBehavior = new ArrayList<>();
zk.getEphemerals(checkPath, (rc, ctx, paths) -> {
if (paths == null) {
unexpectedBehavior.add(String.format("Expected ephemeral count for %s to be %d but was null", checkPath, expected.length));
} else if (paths.size() != EPHEMERAL_CNT) {
unexpectedBehavior.add(String.format("Expected ephemeral count for %s to be %d but was %d", checkPath, EPHEMERAL_CNT, paths.size()));
}
for (int i = 0; i < EPHEMERAL_CNT; i++) {
String path = expected[i];
if (!paths.contains(path)) {
unexpectedBehavior.add(String.format("Expected path=%s didn't exist "
+ "in getEphemerals list.", path));
}
}
doneProcessing.countDown();
}, null);
long waitForCallbackSecs = 2L;
if (!doneProcessing.await(waitForCallbackSecs, TimeUnit.SECONDS)) {
fail(String.format("getEphemerals(%s) didn't callback within %d seconds", checkPath, waitForCallbackSecs));
}
checkForUnexpectedBehavior(unexpectedBehavior);
}
@Test
public void testGetEphemeralsEmpty() throws IOException, KeeperException, InterruptedException {
final CountDownLatch doneProcessing = new CountDownLatch(1);
final String checkPath = "/unknownPath";
final int expectedSize = 0;
final List<String> unexpectedBehavior = new ArrayList<>();
zk.getEphemerals(checkPath, (rc, ctx, paths) -> {
if (paths == null) {
unexpectedBehavior.add(String.format("Expected ephemeral count for %s to be %d but was null", checkPath, expectedSize));
} else if (paths.size() != expectedSize) {
unexpectedBehavior.add(String.format("Expected ephemeral count for %s to be %d but was %d", checkPath, expectedSize, paths.size()));
}
doneProcessing.countDown();
}, null);
long waitForCallbackSecs = 2L;
if (!doneProcessing.await(waitForCallbackSecs, TimeUnit.SECONDS)) {
fail(String.format("getEphemerals(%s) didn't callback within %d seconds", checkPath, waitForCallbackSecs));
}
checkForUnexpectedBehavior(unexpectedBehavior);
}
@Test
public void testGetEphemeralsErrors() throws KeeperException {
try {
zk.getEphemerals(null, null, null);
fail("Should have thrown a IllegalArgumentException for a null prefixPath");
} catch (IllegalArgumentException e) {
//pass
}
try {
zk.getEphemerals("no leading slash", null, null);
fail("Should have thrown a IllegalArgumentException " + "for a prefix with no leading slash");
} catch (IllegalArgumentException e) {
//pass
}
}
private String[] generatePaths(int persistantCnt, int ephemeralCnt) throws KeeperException, InterruptedException {
final String[] expected = new String[persistantCnt * ephemeralCnt];
for (int p = 0; p < persistantCnt; p++) {
String base = BASE + p;
zk.create(base, base.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
for (int e = 0; e < ephemeralCnt; e++) {
String ephem = base + "/ephem" + e;
zk.create(ephem, ephem.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
expected[p * ephemeralCnt + e] = ephem;
}
}
return expected;
}
private void checkForUnexpectedBehavior(List<String> unexpectedBehavior) {
if (unexpectedBehavior.size() > 0) {
StringBuilder b = new StringBuilder("The test failed for the following reasons:");
b.append(NEWLINE);
for (String error : unexpectedBehavior) {
b.append("ERROR: ").append(error).append(NEWLINE);
}
fail(b.toString());
}
}
}
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