hs.hsadmin/hsarback/src/de/hsadmin/mods/db/PgSqlDatabaseProcessorFactory.java

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2011-03-22 23:02:06 +01:00
package de.hsadmin.mods.db;
import javax.persistence.EntityManager;
import de.hsadmin.core.model.AbstractEntity;
import de.hsadmin.core.qserv.EntityProcessorFactory;
import de.hsadmin.core.qserv.Processor;
/**
* Factory class which creates Processor instances for dealing with UNIX user
* accounts.
*
* @author mi
*/
public class PgSqlDatabaseProcessorFactory implements EntityProcessorFactory {
/**
* creates a JDBCProcessor for PostgreSQL and the given user
*
* @param user
* @param password
* @return
*/
public static JDBCProcessor createPostgreSqlProcessor(String user, String password) {
return new JDBCProcessor("org.postgresql.Driver",
"jdbc:postgresql://localhost/template1", user, password);
}
/**
* creates a JDBCProcessor for the PostgreSQL admin user
*
* @return
*/
public static JDBCProcessor createPostgreSqlAdminProcessor() {
return new JDBCProcessor("org.postgresql.Driver", "jdbc:postgresql://localhost/template1");
}
/**
* @return a Processor which creates a new database
*/
public <T extends AbstractEntity> Processor createCreateProcessor(EntityManager em, T entity) {
Database db = (Database) entity;
assert db.getInstance().equals("pgsql");
JDBCProcessor aJDBCP = null;
String aName = AbstractEntity.escapeString(db.getName());
String aOwner = AbstractEntity.escapeString(db.getOwner());
String aEncoding = AbstractEntity.escapeString(db.getEncoding());
aJDBCP = createPostgreSqlAdminProcessor();
aJDBCP.addSQL("CREATE DATABASE " + aName + " OWNER=" + aOwner + " ENCODING='" + aEncoding + "' TEMPLATE template0");
return aJDBCP;
}
/**
* @return a Processor which updates a preexisting database
*/
public <T extends AbstractEntity> Processor createUpdateProcessor(EntityManager em, T entity) {
Database db = (Database) entity;
assert db.getInstance().equals("pgsql");
String aName = AbstractEntity.escapeString(db.getName());
String aOwner = AbstractEntity.escapeString(db.getOwner());
JDBCProcessor aJDBCP = null;
aJDBCP = createPostgreSqlAdminProcessor();
aJDBCP.addSQL("ALTER DATABASE " + aName + " OWNER TO " + aOwner);
return aJDBCP;
}
/**
* @return a Processor which deletes an existing database
*/
public <T extends AbstractEntity> Processor createDeleteProcessor(EntityManager em, T entity) {
Database db = (Database) entity;
assert db.getInstance().equals("pgsql");
JDBCProcessor aJDBCP = createPostgreSqlAdminProcessor();
String aName = AbstractEntity.escapeString(db.getName());
aJDBCP.addSQL("DROP DATABASE " + aName);
return aJDBCP;
}
}