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/**
* The FreeBSD Copyright
* Copyright 1994-2008 The FreeBSD Project. All rights reserved.
* Copyright (C) 2013-2020 Philip Helger philip[at]helger[dot]com
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the FreeBSD Project.
*/
package com.helger.as2lib.processor.resender;
import java.util.Map;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.GuardedBy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.helger.as2lib.exception.AS2Exception;
import com.helger.as2lib.message.IMessage;
import com.helger.as2lib.processor.sender.IProcessorSenderModule;
import com.helger.commons.annotation.ReturnsMutableCopy;
import com.helger.commons.collection.impl.CommonsArrayList;
import com.helger.commons.collection.impl.CommonsHashMap;
import com.helger.commons.collection.impl.ICommonsList;
import com.helger.commons.collection.impl.ICommonsMap;
/**
* An asynchronous, in-memory, polling based resender module. Upon
* {@link #handle(String, IMessage, Map)} the document is added to a queue there
* is a background poller task that checks for resending (see {@link #resend()}
* ). If resending fails an exception is thrown.
*
* @author Philip Helger
* @since 2.2.0
*/
public class InMemoryResenderModule extends AbstractActiveResenderModule
{
private static final Logger LOGGER = LoggerFactory.getLogger (InMemoryResenderModule.class);
@GuardedBy ("m_aRWLock")
private final ICommonsList m_aItems = new CommonsArrayList <> ();
@Override
public boolean canHandle (@Nonnull final String sAction,
@Nonnull final IMessage aMsg,
@Nullable final Map aOptions)
{
return sAction.equals (IProcessorResenderModule.DO_RESEND);
}
@Override
public void handle (@Nonnull final String sAction,
@Nonnull final IMessage aMsg,
@Nullable final Map aOptions) throws AS2Exception
{
// Get the action to be used
String sResendAction = aOptions == null ? null
: (String) aOptions.get (IProcessorResenderModule.OPTION_RESEND_ACTION);
if (sResendAction == null)
{
LOGGER.warn ("The resending action is missing - default to message sending!");
sResendAction = IProcessorSenderModule.DO_SEND;
}
// Get the number of retries
final String sRetries = aOptions == null ? null : (String) aOptions.get (IProcessorResenderModule.OPTION_RETRIES);
int nRetries;
if (sRetries != null)
nRetries = Integer.parseInt (sRetries);
else
{
nRetries = IProcessorResenderModule.DEFAULT_RETRIES;
if (LOGGER.isWarnEnabled ())
LOGGER.warn ("The resending retry count is missing - default to " + nRetries + "!");
}
// Build the item and add it to the vector
final ResendItem aItem = new ResendItem (sResendAction, nRetries, aMsg, getResendDelayMS ());
m_aRWLock.writeLocked ( () -> m_aItems.add (aItem));
LOGGER.info ("Message put in resend queue" + aMsg.getLoggingText ());
}
protected void resendItem (@Nonnull final ResendItem aItem) throws AS2Exception
{
if (LOGGER.isDebugEnabled ())
LOGGER.debug ("Resending item");
IMessage aMsg = null;
try
{
final String sResendAction = aItem.getResendAction ();
final String sRemainingRetries = Integer.toString (aItem.getRetries () - 1);
aMsg = aItem.getMessage ();
// Transmit the message
if (LOGGER.isInfoEnabled ())
LOGGER.info ("Loaded message for resend" + aMsg.getLoggingText ());
final ICommonsMap aOptions = new CommonsHashMap <> ();
aOptions.put (IProcessorResenderModule.OPTION_RETRIES, sRemainingRetries);
getSession ().getMessageProcessor ().handle (sResendAction, aMsg, aOptions);
// Finally remove from list
m_aRWLock.writeLocked ( () -> m_aItems.remove (aItem));
}
catch (final AS2Exception ex)
{
throw ex.setSourceMsg (aMsg);
}
}
@Override
public void resend ()
{
try
{
// Determine all items to be re-send
final ICommonsList aResendItems = new CommonsArrayList <> ();
m_aRWLock.readLocked ( () -> m_aItems.findAll (ResendItem::isTimeToSend, aResendItems::add));
// Resend all selected items
for (final ResendItem aResendItem : aResendItems)
resendItem (aResendItem);
}
catch (final AS2Exception ex)
{
ex.terminate ();
forceStop (ex);
}
}
@Nonnegative
public int getResendItemCount ()
{
return m_aRWLock.readLocked (m_aItems::size);
}
/**
* Remove all resend items.
*/
public void removeAllResendItems ()
{
final int nItems = getResendItemCount ();
if (nItems > 0)
{
m_aRWLock.writeLocked (m_aItems::clear);
if (LOGGER.isInfoEnabled ())
LOGGER.info ("Removed " + nItems + " items from InMemoryResenderModule");
}
}
@Nonnull
@ReturnsMutableCopy
public ICommonsList getAllResendItems ()
{
return m_aRWLock.readLocked (m_aItems::getClone);
}
@Override
public void doStop () throws AS2Exception
{
final int nRemainingItems = getResendItemCount ();
if (nRemainingItems > 0)
{
if (LOGGER.isErrorEnabled ())
LOGGER.error ("InMemoryResenderModule is stopped but " +
nRemainingItems +
" items are still contained. They are discarded and will be lost!");
}
super.doStop ();
}
}