com.celum.dbplugin.installer.SqlInstaller Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of db-maven-plugin Show documentation
DB plugin for Maven that executes SQL scripts
There is a newer version: 1.2
/*****************************************************************************
 * Copyright 2012 celum Slovakia s r.o.
 *
 * 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 com.celum.dbplugin.installer;

import com.celum.dbplugin.sqlparser.SqlScriptParser;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.*;

/**
 * It's main execution class that is doing installation of the DB from scripts.
 * The most important method is 'install' that take all SQL scripts from
 * {@link SqlScriptsResource} and executes them under {@link com.celum.dbplugin.mojo.DbAccount account}.
 *
 * @author Zdenko Vrabel ([email protected])
 */
public class SqlInstaller
{
	//-------------------------------------------------------------------------------------------------------------------
	// members
	//-------------------------------------------------------------------------------------------------------------------

	/** event handler that reacting on various SqlInstaller's events */
	private final SqlInstallerEventHandler eventHandler;

	/** this parser split-up the SQL script into statements */
	private final SqlScriptParser sqlParser;

	//-------------------------------------------------------------------------------------------------------------------
	// constructors & methods
	//-------------------------------------------------------------------------------------------------------------------

	/**
	 * Constructor
	 * @param eventHandler
	 */
	public SqlInstaller(SqlInstallerEventHandler eventHandler)
	{
		this.eventHandler = eventHandler;
		this.sqlParser = new SqlScriptParser();
	}


	/**
	 * Constructor
	 */
	public SqlInstaller()
	{
		this(new DummyEventHandler());
	}


	/**
	 * Executes all SQL scripts from given resources
	 *
	 * @param connection
	 * @param resource
	 */
	public void install(Connection connection, SqlScriptsResource resource) throws IOException, SQLException
	{
		Collection scripts = resource.getSortedScripts();
		processAllSqlScripts(connection, scripts);
	}


	private void processAllSqlScripts(Connection con, Collection sqlScripts) throws IOException, SQLException
	{
		for (SqlScript sqlScript : sqlScripts) {
			sqlScript = eventHandler.onProcessScript(sqlScript);
			if (sqlScript != null) {
				processSql(con, sqlScript);
			}
		}
	}


	private void processSql(Connection con, SqlScript script) throws SQLException
	{
		Statement stm = null;
		try {
			stm = con.createStatement();
			processSqlStatement(stm, script);
		} catch (Exception e) {
			eventHandler.onError(e);
		} finally {
			if (stm != null) {
				stm.close();
			}
		}
	}


	private void processSqlStatement(Statement stm, SqlScript script) throws SQLException
	{
		Collection sqls = sqlParser.parseScript(script.asText());
		for (String sql : sqls) {
			sql = eventHandler.onExecuteSql(sql);
			stm.execute(sql);
		}
	}

}