ch.vorburger.mariadb4j.utils.DBSingleton Maven / Gradle / Ivy
/*
* #%L
* MariaDB4j
* %%
* Copyright (C) 2012 - 2018 the original author or authors.
* %%
* 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.
* #L%
*/
package ch.vorburger.mariadb4j.utils;
import ch.vorburger.exec.ManagedProcessException;
import ch.vorburger.mariadb4j.DB;
import ch.vorburger.mariadb4j.DBConfigurationBuilder;
/**
* Holds the database and configuration data for MariaDB4j
*
* Future option:
* If possible change serilized data and pid pointer to db and store in target/MariaDB4j/MariaDB4j.state
* so database can be started with maven exiting and after some time mariaDB4j:stop can be called in a
* new process to shut it down
*
* @author William Dutton
* @since 1.0.0
*/
public final class DBSingleton {
private static DB db;
private static DBConfigurationBuilder configurationBuilder;
private DBSingleton() {
//static final singleton utiliy class
}
public static DB getDB() {
if (db == null)
throw new IllegalStateException("db not set");
return db;
}
public static void shutdownDB() throws ManagedProcessException {
if (db != null) {
db.stop();
db = null;
configurationBuilder = null;
}
}
public static void setDB(DB db) {
DBSingleton.db = db;
}
public static DBConfigurationBuilder getConfigurationBuilder() {
if (configurationBuilder == null)
throw new IllegalStateException("configuration builder not set");
return configurationBuilder;
}
public static void setConfigurationBuilder(DBConfigurationBuilder configurationBuilder) {
DBSingleton.configurationBuilder = configurationBuilder;
}
}