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// loaderCore.java
// ---------------------------
// (C) by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package net.yacy.utils;
import java.util.Properties;
public abstract class loaderCore implements loaderProcess {
// status constants
public static final int STATUS_IDLE = -1; // not yet initialized
public static final int STATUS_READY = 0; // initialized, but not yet started
public static final int STATUS_RUNNING = 1; // started and running
public static final int STATUS_ABORTED = 2; // terminated before completion
public static final int STATUS_FAILED = 3; // failed before completion
public static final int STATUS_COMPLETED = 4; // completed; may run again
public static final int STATUS_FINALIZED = 9; // completed; may not run again
// class variables
protected Exception error = null;
protected int status = STATUS_IDLE;
protected Properties result = new Properties();
protected boolean run = true;
protected int completion = 0;
// steering methods
@Override
public abstract void feed(byte[] a); // returns true if process was successful; should be always synchronized
@Override
public void terminate() {
// if terminated before completion, completed() shows x < 100
run = false;
}
// feed-back methods
@Override
public Properties result() {
return result;
}
@Override
public int completed() {
// guess of completion status. shall be 100 if totally completed.
return completion;
}
// error control
@Override
public int status() {
// -1=idle, 0=ready, 1=running, 2=aborted, 3=failed, 4=completed, 9=finalized
return status;
}
@Override
public boolean available() {
// true if it is ok to feed with feed()
return (status() == STATUS_READY) ||
(status() == STATUS_COMPLETED && (result == null || result.isEmpty()));
}
@Override
public Exception error() {
// if in error status: this returnes exception
return error;
}
}
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