/*
* Copyright 2004-2007 Brian McCallister
*
* 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.
*/
package org.skife.jdbi.v2;
import org.skife.jdbi.v2.exceptions.UnableToCreateStatementException;
import org.skife.jdbi.v2.exceptions.UnableToExecuteStatementException;
import org.skife.jdbi.v2.tweak.StatementRewriter;
import org.skife.jdbi.v2.tweak.SQLLog;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* Represents a group of non-prepared statements to be sent to the RDMBS in one "request"
*/
public class Batch
{
private List<String> parts = new ArrayList<String>();
private final StatementRewriter rewriter;
private final Connection connection;
private final SQLLog log;
private final StatementContext context;
Batch(StatementRewriter rewriter, Connection connection, Map<String, Object> globalStatementAttributes, SQLLog log)
{
this.rewriter = rewriter;
this.connection = connection;
this.log = log;
this.context = new StatementContext(globalStatementAttributes);
}
/**
* Add a statement to the batch
*
* @param sql SQL to be added to the batch, possibly a named statement
* @return the same Batch statement
*/
public Batch add(String sql)
{
parts.add(sql);
return this;
}
/**
* Specify a value on the statement context for this batch
*
* @return self
*/
public Batch define(String key, Object value) {
this.context.setAttribute(key, value);
return this;
}
/**
* Execute all the queued up statements
*
* @return an array of integers representing the return values from each statement's execution
*/
public int[] execute()
{
// short circuit empty batch
if (parts.size() == 0) return new int[] {};
Binding empty = new Binding();
Statement stmt = null;
try
{
try
{
stmt = connection.createStatement();
}
catch (SQLException e)
{
throw new UnableToCreateStatementException(e);
}
final SQLLog.BatchLogger logger = log.logBatch();
try
{
for (String part : parts)
{
final String sql= rewriter.rewrite(part, empty, context).getSql();
logger.add(sql);
stmt.addBatch(sql);
}
}
catch (SQLException e)
{
throw new UnableToExecuteStatementException("Unable to configure JDBC statement", e);
}
try
{
final long start = System.currentTimeMillis();
final int[] rs = stmt.executeBatch();
logger.log(System.currentTimeMillis() - start);
return rs;
}
catch (SQLException e)
{
throw new UnableToExecuteStatementException(e);
}
}
finally
{
QueryPostMungeCleanup.CLOSE_RESOURCES_QUIETLY.cleanup(null, stmt, null);
}
}
}