org.tentackle.dbms.rmi.AbstractDbOperationRemoteDelegateImpl Maven / Gradle / Ivy
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/*
* Tentackle - https://tentackle.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.tentackle.dbms.rmi;
import java.lang.reflect.InvocationTargetException;
import org.tentackle.dbms.AbstractDbOperation;
import org.tentackle.dbms.Db;
import org.tentackle.session.PersistenceException;
/**
* Base class for the remote delegate of AbstractDbOperation.
* All other subclasses of AbstractDbOperation should extend AbstractDbOperationRemoteDelegateImpl to reflect
* the class hierarchy below AbstractDbOperation.
*
* @param the database operation class
* @author harald
*/
public class AbstractDbOperationRemoteDelegateImpl
>
extends RemoteDelegateImpl
implements AbstractDbOperationRemoteDelegate
{
/**
* operation object associated to the delegate's session.
*/
protected P dbOperation;
/**
* Creates a delegate on the serverSession socket.
*
* @param serverSession is the RMI serverSession
* @param clazz is the subclass of AbstractDbOperation
*/
public AbstractDbOperationRemoteDelegateImpl(RemoteDbSessionImpl serverSession, Class
clazz) {
super(serverSession, clazz);
}
/**
* Instantiates a singe object and connect it to the db.
*
* The object is used for all methods not returning a new object and thus
* minimizes object construction.
*/
@Override
public void initialize() {
dbOperation = newInstance();
}
/**
* Creates a new instance of the required class
* for methods that return a new object.
* @return the new object
*/
protected P newInstance() {
try {
return getServicedClass().getDeclaredConstructor(Db.class).newInstance(getSession());
}
catch (IllegalAccessException | IllegalArgumentException | InstantiationException | NoSuchMethodException |
SecurityException | InvocationTargetException e) {
throw new PersistenceException(getSession(), "creating object for class '" + getServicedClass() + "' failed", e);
}
}
}