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45 changes: 45 additions & 0 deletions
45
.../dangdang/ddframe/rdb/sharding/api/strategy/slave/MasterSlaveLoadBalanceStrategyType.java
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| /* | ||
| * Copyright 1999-2015 dangdang.com. | ||
| * <p> | ||
| * 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. | ||
| * </p> | ||
| */ | ||
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| package com.dangdang.ddframe.rdb.sharding.api.strategy.slave; | ||
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| import lombok.Getter; | ||
| import lombok.RequiredArgsConstructor; | ||
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| /** | ||
| * Master-slave database load-balance strategy type. | ||
| * | ||
| * @author zhangliang | ||
| */ | ||
| @RequiredArgsConstructor | ||
| @Getter | ||
| public enum MasterSlaveLoadBalanceStrategyType { | ||
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| RoundRobin(new RoundRobinMasterSlaveLoadBalanceStrategy()), | ||
| Random(new RandomMasterSlaveLoadBalanceStrategy()); | ||
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| private final MasterSlaveLoadBalanceStrategy strategy; | ||
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| /** | ||
| * Get default master-slave database load-balance strategy. | ||
| * | ||
| * @return default master-slave database load-balance strategy | ||
| */ | ||
| public static MasterSlaveLoadBalanceStrategy getDefaultStrategy() { | ||
| return RoundRobin.strategy; | ||
| } | ||
| } |
34 changes: 34 additions & 0 deletions
34
...angdang/ddframe/rdb/sharding/api/strategy/slave/RandomMasterSlaveLoadBalanceStrategy.java
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| @@ -0,0 +1,34 @@ | ||
| /* | ||
| * Copyright 1999-2015 dangdang.com. | ||
| * <p> | ||
| * 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. | ||
| * </p> | ||
| */ | ||
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| package com.dangdang.ddframe.rdb.sharding.api.strategy.slave; | ||
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| import java.util.List; | ||
| import java.util.Random; | ||
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| /** | ||
| * Random slave database load-balance strategy. | ||
| * | ||
| * @author zhangliang | ||
| */ | ||
| public final class RandomMasterSlaveLoadBalanceStrategy implements MasterSlaveLoadBalanceStrategy { | ||
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| @Override | ||
| public String getDataSource(final String name, final String masterDataSourceName, final List<String> slaveDataSourceNames) { | ||
| return slaveDataSourceNames.get(new Random().nextInt(slaveDataSourceNames.size())); | ||
| } | ||
| } |
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24 changes: 24 additions & 0 deletions
24
...ang/ddframe/rdb/sharding/api/strategy/slave/RandomMasterSlaveLoadBalanceStrategyTest.java
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| Original file line number | Diff line number | Diff line change |
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| package com.dangdang.ddframe.rdb.sharding.api.strategy.slave; | ||
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| import org.junit.Test; | ||
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| import java.util.Arrays; | ||
| import java.util.List; | ||
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| import static org.junit.Assert.assertTrue; | ||
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| public final class RandomMasterSlaveLoadBalanceStrategyTest { | ||
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| private final RandomMasterSlaveLoadBalanceStrategy randomMasterSlaveLoadBalanceStrategy = new RandomMasterSlaveLoadBalanceStrategy(); | ||
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| @Test | ||
| public void assertGetDataSource() { | ||
| String masterDataSourceName = "test_ds_master"; | ||
| String slaveDataSourceName1 = "test_ds_slave_1"; | ||
| String slaveDataSourceName2 = "test_ds_slave_2"; | ||
| List<String> slaveDataSourceNames = Arrays.asList(slaveDataSourceName1, slaveDataSourceName2); | ||
| assertTrue(slaveDataSourceNames.contains(randomMasterSlaveLoadBalanceStrategy.getDataSource("ds", masterDataSourceName, slaveDataSourceNames))); | ||
| assertTrue(slaveDataSourceNames.contains(randomMasterSlaveLoadBalanceStrategy.getDataSource("ds", masterDataSourceName, slaveDataSourceNames))); | ||
| assertTrue(slaveDataSourceNames.contains(randomMasterSlaveLoadBalanceStrategy.getDataSource("ds", masterDataSourceName, slaveDataSourceNames))); | ||
| } | ||
| } |
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