Skip to content

Commit

Permalink
fix apache#51
Browse files Browse the repository at this point in the history
terrymanu committed Apr 20, 2016
1 parent 5a43f43 commit f90ecc9
Showing 17 changed files with 534 additions and 361 deletions.
Original file line number Diff line number Diff line change
@@ -0,0 +1,146 @@
/**
* 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>
*/

package com.dangdang.ddframe.rdb.sharding.api;

import com.dangdang.ddframe.rdb.sharding.hint.HintManagerHolder;
import com.dangdang.ddframe.rdb.sharding.hint.ShardingKey;
import com.dangdang.ddframe.rdb.sharding.parser.result.router.Condition;
import com.google.common.base.Preconditions;
import com.google.common.collect.BoundType;
import com.google.common.collect.Range;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
* 通过线索传递分片值的管理器.
*
* @author gaohongtao
* @author zhangliang
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class HintManager implements AutoCloseable {

private final Map<ShardingKey, ShardingValue<?>> databaseShardingValues = new HashMap<>();

private final Map<ShardingKey, ShardingValue<?>> tableShardingValues = new HashMap<>();

/**
* 获取线索分片管理器实例.
*
* @return 线索分片管理器实例
*/
public static HintManager getInstance() {
HintManager result = new HintManager();
HintManagerHolder.setHintManager(result);
return result;
}

/**
* 添加分库分片值.
*
* <p>分片操作符为等号.</p>
*
* @param logicTable 逻辑表名称
* @param shardingColumn 分片键
* @param value 分片值
*/
public void addDatabaseShardingValue(final String logicTable, final String shardingColumn, final Comparable<?> value) {
addDatabaseShardingValue(logicTable, shardingColumn, Condition.BinaryOperator.EQUAL, value);
}

/**
* 添加分库分片值.
*
* @param logicTable 逻辑表名称
* @param shardingColumn 分片键
* @param binaryOperator 分片操作符
* @param values 分片值
*/
public void addDatabaseShardingValue(final String logicTable, final String shardingColumn, final Condition.BinaryOperator binaryOperator, final Comparable<?>... values) {
databaseShardingValues.put(new ShardingKey(logicTable, shardingColumn), getShardingValue(shardingColumn, binaryOperator, values));
}

/**
* 添加分表分片值.
*
* <p>分片操作符为等号.</p>
*
* @param logicTable 逻辑表名称
* @param shardingColumn 分片键
* @param value 分片值
*/
public void addTableShardingValue(final String logicTable, final String shardingColumn, final Comparable<?> value) {
addTableShardingValue(logicTable, shardingColumn, Condition.BinaryOperator.EQUAL, value);
}

/**
* 添加分表分片值.
*
* @param logicTable 逻辑表名称
* @param shardingColumn 分片键
* @param binaryOperator 分片操作符
* @param values 分片值
*/
public void addTableShardingValue(final String logicTable, final String shardingColumn, final Condition.BinaryOperator binaryOperator, final Comparable<?>... values) {
tableShardingValues.put(new ShardingKey(logicTable, shardingColumn), getShardingValue(shardingColumn, binaryOperator, values));
}

@SuppressWarnings("unchecked")
private ShardingValue getShardingValue(final String shardingColumn, final Condition.BinaryOperator binaryOperator, final Comparable<?>[] values) {
Preconditions.checkArgument(null != values && values.length > 0);
switch (binaryOperator) {
case EQUAL:
return new ShardingValue<Comparable<?>>(shardingColumn, values[0]);
case IN:
return new ShardingValue(shardingColumn, Arrays.asList(values));
case BETWEEN:
return new ShardingValue(shardingColumn, Range.range(values[0], BoundType.CLOSED, values[1], BoundType.CLOSED));
default:
throw new UnsupportedOperationException(binaryOperator.getExpression());
}
}

/**
* 获取分库分片键值.
*
* @param shardingKey 分片键
* @return 分库分片键值
*/
public ShardingValue<?> getDatabaseShardingValue(final ShardingKey shardingKey) {
return databaseShardingValues.get(shardingKey);
}

/**
* 获取分表分片键值.
*
* @param shardingKey 分片键
* @return 分表分片键值
*/
public ShardingValue<?> getTableShardingValue(final ShardingKey shardingKey) {
return tableShardingValues.get(shardingKey);
}

@Override
public void close() {
HintManagerHolder.clear();
}
}

This file was deleted.

Original file line number Diff line number Diff line change
@@ -0,0 +1,81 @@
/**
* 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>
*/

package com.dangdang.ddframe.rdb.sharding.hint;

import com.dangdang.ddframe.rdb.sharding.api.HintManager;
import com.dangdang.ddframe.rdb.sharding.api.ShardingValue;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;

/**
* 线索分片管理器的本地线程持有者.
*
* @author zhangliang
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class HintManagerHolder {

private static final ThreadLocal<HintManager> HINT_MANAGER_HOLDER = new ThreadLocal<>();

/**
* 设置线索分片管理器.
*
* @param hintManager 线索分片管理器
*/
public static void setHintManager(HintManager hintManager) {
Preconditions.checkState(null == HINT_MANAGER_HOLDER.get(), "HintManagerHolder has previous value, please clear first.");
HINT_MANAGER_HOLDER.set(hintManager);
}

/**
* 判断当前线程是否使用线索分片.
* @return 当前线程是否使用线索分片
*/
public static boolean isUseHint() {
return null != HINT_MANAGER_HOLDER.get();
}

/**
* 获取分库分片键值.
*
* @param shardingKey 分片键
* @return 分库分片键值
*/
public static Optional<ShardingValue<?>> getDatabaseShardingValue(final ShardingKey shardingKey) {
return isUseHint() ? Optional.<ShardingValue<?>>fromNullable(HINT_MANAGER_HOLDER.get().getDatabaseShardingValue(shardingKey)) : Optional.<ShardingValue<?>>absent();
}

/**
* 获取分表分片键值.
*
* @param shardingKey 分片键
* @return 分表分片键值
*/
public static Optional<ShardingValue<?>> getTableShardingValue(final ShardingKey shardingKey) {
return isUseHint() ? Optional.<ShardingValue<?>>fromNullable(HINT_MANAGER_HOLDER.get().getTableShardingValue(shardingKey)) : Optional.<ShardingValue<?>>absent();
}

/**
* 清理线索分片管理器的本地线程持有者
*/
public static void clear() {
HINT_MANAGER_HOLDER.remove();
}
}
Loading

0 comments on commit f90ecc9

Please sign in to comment.