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/*
* 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.dbconfig;
import java.io.InputStream;
import java.sql.Connection;
/**
* This is the master class having public utility APIs exposed for DAS sample creater - for table and data maintainance.
*
*/
public class DBInitializer {
private static final String DEFAULT_CANNED_DB_CONFIGURATION = "CannedSampleDBConfig.xml";
/**
* Database configuration model
*/
protected DBConfig dbConfig;
/**
* Database connection
*/
protected Connection connection;
/**
* To manage database connection
*/
protected DBConnectionHelper dbConnectionHelper;
/**
* To manage database phisical structure
*/
protected DBHelper dbHelper;
/**
* To manage database population
*/
protected DBDataHelper dbDataHelper;
/**
* Create instance of DBInitHelper based on default canned database configuration
*
* @param dbconfigFileLocation
* @throws Exception
*/
public DBInitializer() {
InputStream dbConfigStream = this.getClass().getClassLoader().getResourceAsStream(DEFAULT_CANNED_DB_CONFIGURATION);
init(dbConfigStream);
}
/**
* Create instance of DBInitHelper based on Config file location
*
* @param dbconfigFileLocation
* @throws Exception
*/
public DBInitializer(String dbconfigFileLocation) throws Exception {
InputStream dbConfigStream = this.getClass().getClassLoader().getResourceAsStream(dbconfigFileLocation);
init(dbConfigStream);
}
/**
* Create instance of DBInitHelper based on Config stream
*
* @param dbconfigStream
* @throws Exception
*/
public DBInitializer(InputStream dbConfigStream) throws Exception {
init(dbConfigStream);
}
/**
* Initialize helper members based on Config
*
* @param dbconfigStream
*/
protected void init(InputStream dbconfigStream) {
dbConfig = DBConfigUtil.loadDBConfig(dbconfigStream);
dbConnectionHelper = new DBConnectionHelper();
dbHelper = new DBHelper(dbConfig);
dbDataHelper = new DBDataHelper(dbConfig);
}
/**
* Check if the Database and all tables have been created on the database
*
* @return return true if tables exist, else return false.
*/
public boolean isDatabaseReady() {
return dbHelper.isDatabaseReady();
}
/**
*
* @return - return true if all tables have at least a row, false otherwise
*/
public boolean isDatabasePopulated() {
return dbDataHelper.isDatabasePopulated();
}
/**
* Create tables and populate data.
*
* @param clean - If true, tables will be force dropped and recreated, else it will skip table creation for pre-existing tables.
* @throws Exception
*/
public void initializeDatabase(boolean clean) throws DatabaseInitializerException {
if (clean) {
dbHelper.dropDatabaseTables();
}
dbHelper.initializeDatabase();
dbDataHelper.initializeDatabaseData();
}
/**
* Populate database data
*
* @param clean If true, table data will be droped before data is created
*/
public void initializeDatabaseData(boolean clean) throws DatabaseInitializerException{
if (clean) {
dbDataHelper.deleteDatabaseData();
}
dbDataHelper.initializeDatabaseData();
}
/**
* Refresh data in tables.
*
* @throws Exception
*/
public void refreshDatabaseData() throws DatabaseInitializerException {
initializeDatabase(true);
}
}
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