package org.jacorb.notification.engine;
/*
* JacORB - a free Java ORB
*
* Copyright (C) 1997-2014 Gerald Brose / The JacORB Team.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
import org.slf4j.Logger;
import org.jacorb.notification.interfaces.IProxyPushSupplier;
import org.jacorb.notification.util.LogUtil;
import org.omg.CORBA.OBJECT_NOT_EXIST;
import org.omg.CosEventComm.Disconnected;
/**
* @author Alphonse Bendt
*/
public abstract class AbstractRetryStrategy implements RetryStrategy
{
protected final Logger logger_ = LogUtil.getLogger(getClass().getName());
protected final PushOperation pushOperation_;
protected final IProxyPushSupplier pushSupplier_;
private boolean active_ = true;
// //////////////////////////////////////
public AbstractRetryStrategy(IProxyPushSupplier pushSupplier, PushOperation operation)
{
pushSupplier_ = pushSupplier;
pushOperation_ = operation;
}
// //////////////////////////////////////
public void dispose()
{
pushOperation_.dispose();
}
protected boolean isRetryAllowed()
{
return active_ && pushSupplier_.isRetryAllowed();
}
protected void remoteExceptionOccured(Exception error) throws RetryException
{
logger_.debug("Error during retry", error);
if (isFatalException(error))
{
if (!pushSupplier_.isDestroyed())
{
pushSupplier_.destroy();
}
active_ = false;
throw new RetryException("fatal exception while retrying push");
}
pushSupplier_.incErrorCounter();
if (!isRetryAllowed())
{
if (!pushSupplier_.isDestroyed())
{
pushSupplier_.destroy();
}
active_ = false;
throw new RetryException("no more retries. giving up.");
}
waitUntilNextTry();
}
public static boolean isFatalException(Exception error)
{
if (error instanceof OBJECT_NOT_EXIST)
{
return true;
}
else if (error instanceof Disconnected)
{
return true;
}
return false;
}
protected abstract long getTimeToWait();
public final void retry() throws RetryException
{
if (isRetryAllowed())
{
waitUntilNextTry();
retryInternal();
}
else
{
dispose();
}
}
protected abstract void retryInternal() throws RetryException;
private void waitUntilNextTry()
{
long timeToWait = getTimeToWait();
try
{
if (timeToWait > 0)
{
Thread.sleep(timeToWait);
}
} catch (InterruptedException ignored)
{
// ignored
}
}
}