org.apache.ibatis.executor.BatchExecutor Maven / Gradle / Ivy
package org.apache.ibatis.executor;
import org.apache.ibatis.executor.keygen.Jdbc3KeyGenerator;
import org.apache.ibatis.executor.keygen.KeyGenerator;
import org.apache.ibatis.executor.statement.StatementHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.apache.ibatis.transaction.Transaction;
import java.sql.BatchUpdateException;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
public class BatchExecutor extends BaseExecutor {
public static final int BATCH_UPDATE_RETURN_VALUE = Integer.MIN_VALUE + 1002;
private final List statementList = new ArrayList();
private final List batchResultList = new ArrayList();
private String currentSql;
public BatchExecutor(Configuration configuration, Transaction transaction) {
super(configuration, transaction);
}
public int doUpdate(MappedStatement ms, Object parameterObject)
throws SQLException {
Configuration configuration = ms.getConfiguration();
StatementHandler handler = configuration.newStatementHandler(this, ms, parameterObject, RowBounds.DEFAULT, null);
BoundSql boundSql = handler.getBoundSql();
String sql = boundSql.getSql();
Statement stmt;
if (currentSql != null && sql.hashCode() == currentSql.hashCode() && sql.length() == currentSql.length()) {
int last = statementList.size() - 1;
stmt = statementList.get(last);
} else {
Connection connection = transaction.getConnection();
stmt = handler.prepare(connection);
currentSql = sql;
statementList.add(stmt);
batchResultList.add(new BatchResult(ms, sql, parameterObject));
}
handler.parameterize(stmt);
handler.batch(stmt);
return BATCH_UPDATE_RETURN_VALUE;
}
public List doQuery(MappedStatement ms, Object parameterObject, RowBounds rowBounds, ResultHandler resultHandler)
throws SQLException {
flushStatements();
Configuration configuration = ms.getConfiguration();
StatementHandler handler = configuration.newStatementHandler(this, ms, parameterObject, rowBounds, resultHandler);
Connection connection = transaction.getConnection();
Statement stmt = handler.prepare(connection);
handler.parameterize(stmt);
return handler.query(stmt, resultHandler);
}
public List doFlushStatements() throws SQLException {
List results = new ArrayList();
try {
for (int i = 0, n = statementList.size(); i < n; i++) {
Statement stmt = statementList.get(i);
BatchResult batchResult = batchResultList.get(i);
try {
batchResult.setUpdateCounts(stmt.executeBatch());
MappedStatement ms = batchResult.getMappedStatement();
Object parameter = batchResult.getParameterObject();
KeyGenerator keyGenerator = ms.getKeyGenerator();
if (keyGenerator instanceof Jdbc3KeyGenerator) {
keyGenerator.processAfter(this, ms, stmt, parameter);
}
} catch (BatchUpdateException e) {
StringBuffer message = new StringBuffer();
message.append(batchResult.getMappedStatement().getId())
.append(" (batch index #")
.append(i + 1)
.append(")")
.append(" failed.");
if (i > 0) {
message.append(" ")
.append(i)
.append(" prior sub executor(s) completed successfully, but will be rolled back.");
}
throw new BatchExecutorException(message.toString(), e, results, batchResult);
}
results.add(batchResult);
}
return results;
} finally {
for (Statement stmt : statementList) {
closeStatement(stmt);
}
currentSql = null;
statementList.clear();
batchResultList.clear();
}
}
}