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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.apache.tuscany.das.rdb.impl;
import java.sql.Connection;
import java.sql.DriverManager;
import org.apache.tuscany.das.rdb.ApplyChangesCommand;
import org.apache.tuscany.das.rdb.Command;
import org.apache.tuscany.das.rdb.config.Config;
import org.apache.tuscany.das.rdb.config.ConnectionProperties;
import org.apache.tuscany.das.rdb.config.wrapper.MappingWrapper;
import org.apache.tuscany.das.rdb.util.DebugUtil;
import commonj.sdo.DataObject;
import commonj.sdo.Type;
/**
*
*/
public class ApplyChangesCommandImpl extends BaseCommandImpl implements ApplyChangesCommand {
private static final boolean debug = false;
private ChangeSummarizer summarizer = new ChangeSummarizer();
public ApplyChangesCommandImpl() {
}
public ApplyChangesCommandImpl(Config config){
this.configWrapper = new MappingWrapper(config);
if (config.getConnectionProperties() != null)
setConnection(config.getConnectionProperties());
}
public ApplyChangesCommandImpl(Config config, Connection connection){
this.configWrapper = new MappingWrapper(config);
setConnection(connection);
}
public void setConnection(ConnectionImpl connection) {
summarizer.setConnection(connection);
}
public void setConnection(ConnectionProperties c) {
try {
Connection connection = null;
Class.forName(c.getDriverClassName());
if (c.getDriverUserName() == null)
connection = DriverManager.getConnection(c.getDriverURL());
else
connection = DriverManager.getConnection(c.getDriverURL(), c.getDriverUserName(), c.getDriverPassword());
connection.setAutoCommit(false);
setConnection(connection);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
public void addCreateCommand(Type type, Command cmd) {
summarizer.addCreateCommand(type, cmd);
}
public void addUpdateCommand(Type type, Command cmd) {
summarizer.addUpdateCommand(type, cmd);
}
public void addDeleteCommand(Type type, Command cmd) {
summarizer.addDeleteCommand(type, cmd);
}
public void execute(DataObject root) {
DebugUtil.debugln(getClass(), debug, "Executing ApplyChangesCmd");
if (summarizer.getConnection() == null)
throw new RuntimeException("A connection must be provided");
if (!root.equals(root.getDataGraph().getRootObject()))
throw new RuntimeException("'root' argument must be the root of the datagraph");
summarizer.setMapping(configWrapper);
Changes changes = summarizer.loadChanges(root);
boolean success = false;
try {
changes.execute();
success = true;
} finally {
if (success)
summarizer.getConnection().cleanUp();
else
summarizer.getConnection().errorCleanUp();
}
}
}
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