/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.das.rdb.impl;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.apache.log4j.Logger;
public class ConnectionImpl {
private final Logger logger = Logger.getLogger(ConnectionImpl.class);
private Connection connection;
private boolean managingTransaction = true;
private String generatedKeysSupported = null;
public ConnectionImpl(Connection connection) {
this.connection = connection;
try {
if (connection.getAutoCommit()) {
throw new RuntimeException("AutoCommit must be off");
}
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public Connection getJDBCConnection() {
return connection;
}
public String getGeneratedKeysSupported() {
return this.generatedKeysSupported;
}
public void setGeneratedKeysSupported(String useGetGeneratedKeys){
this.generatedKeysSupported = useGetGeneratedKeys;
}
public boolean isGeneratedKeysSupported() {
try{
if(this.generatedKeysSupported == null){
DatabaseMetaData dbmsMetadata = this.connection.getMetaData();
boolean supportsGetGeneratedKeys = dbmsMetadata.supportsGetGeneratedKeys();
if(supportsGetGeneratedKeys){
this.generatedKeysSupported = "true";
}
//currently DERBY partially supports this feature and thus returns FALSE,
//this hardcoding is needed as the partial support is enough for DAS
//we can remove this later, when DERBY change the behaviour of it's "supportsGetGeneratedKeys"
else if(dbmsMetadata.getDatabaseProductName().indexOf("Derby") > 0){
this.generatedKeysSupported = "true";
}
else{
this.generatedKeysSupported = "false";
}
}
}catch(Exception e){//can be from supportsGetGeneratedKeys or due to absense of supportsGetGeneratedKeys
if (this.logger.isDebugEnabled()) {
this.logger.debug("exception setiing useGetGeneratedKeys false");
}
this.generatedKeysSupported = "false";
}
if (this.logger.isDebugEnabled()) {
this.logger.debug("returning useGetGeneratedKeys():"+ this.generatedKeysSupported);
}
return Boolean.parseBoolean(this.generatedKeysSupported);
}
public void cleanUp() {
try {
if (managingTransaction) {
if (this.logger.isDebugEnabled()) {
this.logger.debug("Committing Transaction");
}
connection.commit();
}
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public void errorCleanUp() {
try {
if (managingTransaction) {
if (this.logger.isDebugEnabled()) {
this.logger.debug("Rolling back Transaction");
}
connection.rollback();
}
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public PreparedStatement prepareStatement(String queryString, String[] returnKeys) throws SQLException {
if (this.logger.isDebugEnabled()) {
this.logger.debug("Preparing Statement: " + queryString);
this.logger.debug("Boolean value for use gen key: " + this.generatedKeysSupported);
}
if (isGeneratedKeysSupported()) {
return connection.prepareStatement(queryString, Statement.RETURN_GENERATED_KEYS);
} else if (returnKeys.length > 0) {
return connection.prepareStatement(queryString, returnKeys);
}
return connection.prepareStatement(queryString);
}
public PreparedStatement preparePagedStatement(String queryString) throws SQLException {
if (this.logger.isDebugEnabled()) {
this.logger.debug("Preparing Statement: " + queryString);
}
return connection.prepareStatement(queryString, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
}
public void setManageTransactions(boolean manageTransactions) {
managingTransaction = manageTransactions;
}
public CallableStatement prepareCall(String queryString) throws SQLException {
return connection.prepareCall(queryString);
}
}