/**
* 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 com.twitter.distributedlog.client.ownership;
import com.twitter.distributedlog.client.ClientConfig;
import com.twitter.finagle.stats.NullStatsReceiver;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestName;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.Map;
import java.util.Set;
import static org.junit.Assert.*;
/**
* Test Case for Ownership Cache
*/
public class TestOwnershipCache {
@Rule
public TestName runtime = new TestName();
private static OwnershipCache createOwnershipCache() {
ClientConfig clientConfig = new ClientConfig();
return new OwnershipCache(clientConfig, null,
NullStatsReceiver.get(), NullStatsReceiver.get());
}
private static SocketAddress createSocketAddress(int port) {
return new InetSocketAddress("127.0.0.1", port);
}
@Test(timeout = 60000)
public void testUpdateOwner() {
OwnershipCache cache = createOwnershipCache();
SocketAddress addr = createSocketAddress(1000);
String stream = runtime.getMethodName();
assertTrue("Should successfully update owner if no owner exists before",
cache.updateOwner(stream, addr));
assertEquals("Owner should be " + addr + " for stream " + stream,
addr, cache.getOwner(stream));
assertTrue("Should successfully update owner if old owner is same",
cache.updateOwner(stream, addr));
assertEquals("Owner should be " + addr + " for stream " + stream,
addr, cache.getOwner(stream));
}
@Test(timeout = 60000)
public void testRemoveOwnerFromStream() {
OwnershipCache cache = createOwnershipCache();
int initialPort = 2000;
int numProxies = 2;
int numStreamsPerProxy = 2;
for (int i = 0; i < numProxies; i++) {
SocketAddress addr = createSocketAddress(initialPort + i);
for (int j = 0; j < numStreamsPerProxy; j++) {
String stream = runtime.getMethodName() + "_" + i + "_" + j;
cache.updateOwner(stream, addr);
}
}
Map<String, SocketAddress> ownershipMap = cache.getStreamOwnerMapping();
assertEquals("There should be " + (numProxies * numStreamsPerProxy) + " entries in cache",
numProxies * numStreamsPerProxy, ownershipMap.size());
Map<SocketAddress, Set<String>> ownershipDistribution = cache.getStreamOwnershipDistribution();
assertEquals("There should be " + numProxies + " proxies cached",
numProxies, ownershipDistribution.size());
String stream = runtime.getMethodName() + "_0_0";
SocketAddress owner = createSocketAddress(initialPort);
// remove non-existent mapping won't change anything
SocketAddress nonExistentAddr = createSocketAddress(initialPort + 999);
cache.removeOwnerFromStream(stream, nonExistentAddr, "remove-non-existent-addr");
assertEquals("Owner " + owner + " should not be removed",
owner, cache.getOwner(stream));
ownershipMap = cache.getStreamOwnerMapping();
assertEquals("There should be " + (numProxies * numStreamsPerProxy) + " entries in cache",
numProxies * numStreamsPerProxy, ownershipMap.size());
// remove existent mapping should remove ownership mapping
cache.removeOwnerFromStream(stream, owner, "remove-owner");
assertNull("Owner " + owner + " should be removed", cache.getOwner(stream));
ownershipMap = cache.getStreamOwnerMapping();
assertEquals("There should be " + (numProxies * numStreamsPerProxy - 1) + " entries left in cache",
numProxies * numStreamsPerProxy - 1, ownershipMap.size());
ownershipDistribution = cache.getStreamOwnershipDistribution();
assertEquals("There should still be " + numProxies + " proxies cached",
numProxies, ownershipDistribution.size());
Set<String> ownedStreams = ownershipDistribution.get(owner);
assertEquals("There should be only " + (numStreamsPerProxy - 1) + " streams owned for " + owner,
numStreamsPerProxy - 1, ownedStreams.size());
assertFalse("Stream " + stream + " should not be owned by " + owner,
ownedStreams.contains(stream));
}
@Test(timeout = 60000)
public void testRemoveAllStreamsFromOwner() {
OwnershipCache cache = createOwnershipCache();
int initialPort = 2000;
int numProxies = 2;
int numStreamsPerProxy = 2;
for (int i = 0; i < numProxies; i++) {
SocketAddress addr = createSocketAddress(initialPort + i);
for (int j = 0; j < numStreamsPerProxy; j++) {
String stream = runtime.getMethodName() + "_" + i + "_" + j;
cache.updateOwner(stream, addr);
}
}
Map<String, SocketAddress> ownershipMap = cache.getStreamOwnerMapping();
assertEquals("There should be " + (numProxies * numStreamsPerProxy) + " entries in cache",
numProxies * numStreamsPerProxy, ownershipMap.size());
Map<SocketAddress, Set<String>> ownershipDistribution = cache.getStreamOwnershipDistribution();
assertEquals("There should be " + numProxies + " proxies cached",
numProxies, ownershipDistribution.size());
SocketAddress owner = createSocketAddress(initialPort);
// remove non-existent host won't change anything
SocketAddress nonExistentAddr = createSocketAddress(initialPort + 999);
cache.removeAllStreamsFromOwner(nonExistentAddr);
ownershipMap = cache.getStreamOwnerMapping();
assertEquals("There should still be " + (numProxies * numStreamsPerProxy) + " entries in cache",
numProxies * numStreamsPerProxy, ownershipMap.size());
ownershipDistribution = cache.getStreamOwnershipDistribution();
assertEquals("There should still be " + numProxies + " proxies cached",
numProxies, ownershipDistribution.size());
// remove existent host should remove ownership mapping
cache.removeAllStreamsFromOwner(owner);
ownershipMap = cache.getStreamOwnerMapping();
assertEquals("There should be " + ((numProxies - 1) * numStreamsPerProxy) + " entries left in cache",
(numProxies - 1) * numStreamsPerProxy, ownershipMap.size());
ownershipDistribution = cache.getStreamOwnershipDistribution();
assertEquals("There should be " + (numProxies - 1) + " proxies cached",
numProxies - 1, ownershipDistribution.size());
assertFalse("Host " + owner + " should not be cached",
ownershipDistribution.containsKey(owner));
}
@Test(timeout = 60000)
public void testReplaceOwner() {
OwnershipCache cache = createOwnershipCache();
int initialPort = 2000;
int numProxies = 2;
int numStreamsPerProxy = 2;
for (int i = 0; i < numProxies; i++) {
SocketAddress addr = createSocketAddress(initialPort + i);
for (int j = 0; j < numStreamsPerProxy; j++) {
String stream = runtime.getMethodName() + "_" + i + "_" + j;
cache.updateOwner(stream, addr);
}
}
Map<String, SocketAddress> ownershipMap = cache.getStreamOwnerMapping();
assertEquals("There should be " + (numProxies * numStreamsPerProxy) + " entries in cache",
numProxies * numStreamsPerProxy, ownershipMap.size());
Map<SocketAddress, Set<String>> ownershipDistribution = cache.getStreamOwnershipDistribution();
assertEquals("There should be " + numProxies + " proxies cached",
numProxies, ownershipDistribution.size());
String stream = runtime.getMethodName() + "_0_0";
SocketAddress oldOwner = createSocketAddress(initialPort);
SocketAddress newOwner = createSocketAddress(initialPort + 999);
cache.updateOwner(stream, newOwner);
assertEquals("Owner of " + stream + " should be changed from " + oldOwner + " to " + newOwner,
newOwner, cache.getOwner(stream));
ownershipMap = cache.getStreamOwnerMapping();
assertEquals("There should be " + (numProxies * numStreamsPerProxy) + " entries in cache",
numProxies * numStreamsPerProxy, ownershipMap.size());
assertEquals("Owner of " + stream + " should be " + newOwner,
newOwner, ownershipMap.get(stream));
ownershipDistribution = cache.getStreamOwnershipDistribution();
assertEquals("There should be " + (numProxies + 1) + " proxies cached",
numProxies + 1, ownershipDistribution.size());
Set<String> oldOwnedStreams = ownershipDistribution.get(oldOwner);
assertEquals("There should be only " + (numStreamsPerProxy - 1) + " streams owned by " + oldOwner,
numStreamsPerProxy - 1, oldOwnedStreams.size());
assertFalse("Stream " + stream + " should not be owned by " + oldOwner,
oldOwnedStreams.contains(stream));
Set<String> newOwnedStreams = ownershipDistribution.get(newOwner);
assertEquals("There should be only " + (numStreamsPerProxy - 1) + " streams owned by " + newOwner,
1, newOwnedStreams.size());
assertTrue("Stream " + stream + " should be owned by " + newOwner,
newOwnedStreams.contains(stream));
}
}