/*
* 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.executor.wrapper;
import com.dangdang.ddframe.rdb.sharding.executor.event.DMLExecutionEvent;
import com.dangdang.ddframe.rdb.sharding.executor.event.DQLExecutionEvent;
import com.dangdang.ddframe.rdb.sharding.router.SQLExecutionUnit;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import lombok.Getter;
import java.sql.PreparedStatement;
import java.util.ArrayList;
import java.util.List;
/**
* 预编译语句对象的执行上下文.
*
* @author zhangliang
*/
public class PreparedStatementExecutorWrapper extends AbstractExecutorWrapper {
@Getter
private final PreparedStatement preparedStatement;
private final Optional<DMLExecutionEvent> dmlExecutionEvent;
private final Optional<DQLExecutionEvent> dqlExecutionEvent;
@Getter
private final List<Integer[]> batchIndices = new ArrayList<>();
private int batchIndex;
public PreparedStatementExecutorWrapper(final PreparedStatement preparedStatement, final List<Object> parameters,
final SQLExecutionUnit sqlExecutionUnit) {
super(sqlExecutionUnit);
this.preparedStatement = preparedStatement;
if (isDML()) {
dmlExecutionEvent = Optional.of(new DMLExecutionEvent(getSqlExecutionUnit().getDataSource(), getSqlExecutionUnit().getSql(), Lists.newArrayList(parameters)));
dqlExecutionEvent = Optional.absent();
} else if (isDQL()) {
dqlExecutionEvent = Optional.of(new DQLExecutionEvent(getSqlExecutionUnit().getDataSource(), getSqlExecutionUnit().getSql(), Lists.newArrayList(parameters)));
dmlExecutionEvent = Optional.absent();
} else {
dmlExecutionEvent = Optional.absent();
dqlExecutionEvent = Optional.absent();
}
}
@Override
public Optional<DMLExecutionEvent> getDMLExecutionEvent() {
return dmlExecutionEvent;
}
@Override
public Optional<DQLExecutionEvent> getDQLExecutionEvent() {
return dqlExecutionEvent;
}
/**
* 增加批量参数.
*
* @param parameters 参数列表
*/
public void addBatchParameters(final List<Object> parameters) {
Preconditions.checkArgument(isDML() && dmlExecutionEvent.isPresent());
dmlExecutionEvent.get().addBatchParameters(Lists.newArrayList(parameters));
}
/**
* 映射批量执行索引.
* 将{@linkplain com.dangdang.ddframe.rdb.sharding.jdbc.ShardingPreparedStatement}批量执行索引映射为真实的{@linkplain PreparedStatement}批量执行索引.
*
* @param shardingBatchIndex 分片批量执行索引
*/
public void mapBatchIndex(final int shardingBatchIndex) {
batchIndices.add(new Integer[]{shardingBatchIndex, this.batchIndex++});
}
}