Java tutorial
/* * 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.cassandra.locator; import java.net.InetAddress; import java.util.*; import org.apache.cassandra.db.Table; import org.apache.commons.lang.StringUtils; import org.junit.Test; import org.apache.cassandra.SchemaLoader; import org.apache.cassandra.config.ConfigurationException; import org.apache.cassandra.dht.BigIntegerToken; import org.apache.cassandra.dht.Token; public class ReplicationStrategyEndpointCacheTest extends SchemaLoader { private TokenMetadata tmd; private Token searchToken; private AbstractReplicationStrategy strategy; public void setup(Class stratClass, Map<String, String> strategyOptions) throws Exception { tmd = new TokenMetadata(); searchToken = new BigIntegerToken(String.valueOf(15)); strategy = getStrategyWithNewTokenMetadata(Table.open("Keyspace3").getReplicationStrategy(), tmd); tmd.updateNormalToken(new BigIntegerToken(String.valueOf(10)), InetAddress.getByName("127.0.0.1")); tmd.updateNormalToken(new BigIntegerToken(String.valueOf(20)), InetAddress.getByName("127.0.0.2")); tmd.updateNormalToken(new BigIntegerToken(String.valueOf(30)), InetAddress.getByName("127.0.0.3")); tmd.updateNormalToken(new BigIntegerToken(String.valueOf(40)), InetAddress.getByName("127.0.0.4")); //tmd.updateNormalToken(new BigIntegerToken(String.valueOf(50)), InetAddress.getByName("127.0.0.5")); tmd.updateNormalToken(new BigIntegerToken(String.valueOf(60)), InetAddress.getByName("127.0.0.6")); tmd.updateNormalToken(new BigIntegerToken(String.valueOf(70)), InetAddress.getByName("127.0.0.7")); tmd.updateNormalToken(new BigIntegerToken(String.valueOf(80)), InetAddress.getByName("127.0.0.8")); } @Test public void testEndpointsWereCached() throws Exception { runEndpointsWereCachedTest(FakeSimpleStrategy.class, null); runEndpointsWereCachedTest(FakeOldNetworkTopologyStrategy.class, null); runEndpointsWereCachedTest(FakeNetworkTopologyStrategy.class, new HashMap<String, String>()); } public void runEndpointsWereCachedTest(Class stratClass, Map<String, String> configOptions) throws Exception { setup(stratClass, configOptions); assert strategy.getNaturalEndpoints(searchToken).equals(strategy.getNaturalEndpoints(searchToken)); } @Test public void testCacheRespectsTokenChanges() throws Exception { runCacheRespectsTokenChangesTest(SimpleStrategy.class, null); runCacheRespectsTokenChangesTest(OldNetworkTopologyStrategy.class, null); runCacheRespectsTokenChangesTest(NetworkTopologyStrategy.class, new HashMap<String, String>()); } public void runCacheRespectsTokenChangesTest(Class stratClass, Map<String, String> configOptions) throws Exception { setup(stratClass, configOptions); ArrayList<InetAddress> initial; ArrayList<InetAddress> endpoints; endpoints = strategy.getNaturalEndpoints(searchToken); assert endpoints.size() == 5 : StringUtils.join(endpoints, ","); // test token addition, in DC2 before existing token initial = strategy.getNaturalEndpoints(searchToken); tmd.updateNormalToken(new BigIntegerToken(String.valueOf(35)), InetAddress.getByName("127.0.0.5")); endpoints = strategy.getNaturalEndpoints(searchToken); assert endpoints.size() == 5 : StringUtils.join(endpoints, ","); assert !endpoints.equals(initial); // test token removal, newly created token initial = strategy.getNaturalEndpoints(searchToken); tmd.removeEndpoint(InetAddress.getByName("127.0.0.5")); endpoints = strategy.getNaturalEndpoints(searchToken); assert endpoints.size() == 5 : StringUtils.join(endpoints, ","); assert !endpoints.contains(InetAddress.getByName("127.0.0.5")); assert !endpoints.equals(initial); // test token change initial = strategy.getNaturalEndpoints(searchToken); //move .8 after search token but before other DC3 tmd.updateNormalToken(new BigIntegerToken(String.valueOf(25)), InetAddress.getByName("127.0.0.8")); endpoints = strategy.getNaturalEndpoints(searchToken); assert endpoints.size() == 5 : StringUtils.join(endpoints, ","); assert !endpoints.equals(initial); } protected static class FakeSimpleStrategy extends SimpleStrategy { private boolean called = false; public FakeSimpleStrategy(String table, TokenMetadata tokenMetadata, IEndpointSnitch snitch, Map<String, String> configOptions) { super(table, tokenMetadata, snitch, configOptions); } public List<InetAddress> calculateNaturalEndpoints(Token token, TokenMetadata metadata) { assert !called : "calculateNaturalEndpoints was already called, result should have been cached"; called = true; return super.calculateNaturalEndpoints(token, metadata); } } protected static class FakeOldNetworkTopologyStrategy extends OldNetworkTopologyStrategy { private boolean called = false; public FakeOldNetworkTopologyStrategy(String table, TokenMetadata tokenMetadata, IEndpointSnitch snitch, Map<String, String> configOptions) { super(table, tokenMetadata, snitch, configOptions); } public List<InetAddress> calculateNaturalEndpoints(Token token, TokenMetadata metadata) { assert !called : "calculateNaturalEndpoints was already called, result should have been cached"; called = true; return super.calculateNaturalEndpoints(token, metadata); } } protected static class FakeNetworkTopologyStrategy extends NetworkTopologyStrategy { private boolean called = false; public FakeNetworkTopologyStrategy(String table, TokenMetadata tokenMetadata, IEndpointSnitch snitch, Map<String, String> configOptions) throws ConfigurationException { super(table, tokenMetadata, snitch, configOptions); } public List<InetAddress> calculateNaturalEndpoints(Token token, TokenMetadata metadata) { assert !called : "calculateNaturalEndpoints was already called, result should have been cached"; called = true; return super.calculateNaturalEndpoints(token, metadata); } } private AbstractReplicationStrategy getStrategyWithNewTokenMetadata(AbstractReplicationStrategy strategy, TokenMetadata newTmd) throws ConfigurationException { return AbstractReplicationStrategy.createReplicationStrategy(strategy.table, strategy.getClass().getName(), newTmd, strategy.snitch, strategy.configOptions); } }