/
LineBasedInterpreter.java
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/
LineBasedInterpreter.java
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/*
* dCache - http://www.dcache.org/
*
* Copyright (C) 2016 Deutsches Elektronen-Synchrotron
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package diskCacheV111.doors;
import dmg.util.CommandExitException;
/**
* Protocol interpreter to be used with a {@link LineBasedDoor}.
*
* <p>Suitable for line oriented protocols like FTP and DCAP. The methods of this interface are
* called sequentially.
*
* <p>Implementations may optionally implement {@link dmg.cells.nucleus.CellCommandListener},
* {@link dmg.cells.nucleus.CellMessageReceiver} and {@link dmg.cells.nucleus.CellInfoProvider}
* to participate in other operations of the door. The methods of those interface will be called
* concurrently with the methods of this interface.
*
* @see LineBasedInterpreterFactory
*/
public interface LineBasedInterpreter
{
/**
* Process an command line read from the client.
*
* @param cmd
* @throws CommandExitException To terminate the connection to the door.
*/
void execute(String cmd) throws CommandExitException;
/**
* Signals that the connection with the client is being terminated. The
* implementation is still able to send and receive cell messages.
*/
void shutdown();
/**
* Signals that this cell will receive no further cell messages. Sending
* cell messages is also no longer supported. The network connection to
* the client has not yet been closed, but the client might not accept any
* more data.
*/
//TODO not clear why do we need this method, kafka Producer is not closed anymore in this methods implementation
default void messagingClosed()
{
// do nothing.
}
}