/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
* add the following below this CDDL HEADER, with the fields enclosed
* by brackets "[]" replaced with your own identifying information:
* Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
*
* Copyright 2008-2009 Sun Microsystems, Inc.
* Portions Copyright 2013 ForgeRock AS.
*/
package org.opends.server.replication.server;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import static org.opends.server.loggers.debug.DebugLogger.*;
import org.opends.server.loggers.debug.DebugTracer;
import org.opends.server.replication.common.AssuredMode;
import org.opends.server.replication.common.ChangeNumber;
import org.opends.server.replication.protocol.AckMsg;
/**
* This class holds every info needed about the expected acks for a received
* update message requesting assured replication with Safe Data sub-mode.
* It also includes info/routines for constructing the final ack to be sent to
* the sender of the update message.
*/
public class SafeDataExpectedAcksInfo extends ExpectedAcksInfo
{
/**
* The tracer object for the debug logger.
*/
private static final DebugTracer TRACER = getTracer();
// Requested level of safe data when the update message was received.
private byte safeDataLevel = (byte)-1;
// Number of received acks for the matching update message, up to now
// Already set to 1 as the local RS receiving the message from a DS counts.
private byte numReceivedAcks = (byte)1;
/**
* Creates a new SafeDataExpectedAcksInfo.
* @param changeNumber The change number of the assured update message
* @param requesterServerHandler The server that sent the assured update
* message
* @param safeDataLevel The Safe Data level requested for the assured
* update message
* @param expectedServers The list of servers we want an ack from
*/
public SafeDataExpectedAcksInfo(ChangeNumber changeNumber,
ServerHandler requesterServerHandler, byte safeDataLevel,
List<Integer> expectedServers)
{
super(changeNumber, requesterServerHandler, AssuredMode.SAFE_DATA_MODE,
expectedServers);
this.safeDataLevel = safeDataLevel;
}
/**
* {@inheritDoc}
*/
public boolean processReceivedAck(ServerHandler ackingServer, AckMsg ackMsg)
{
/*
* Security: although a DS should not respond to an update message sent to
* him with assured safe data mode, we double check here that the ack sender
* is a RS to take the ack into account.
*/
if (ackingServer.isDataServer())
{
// Sanity check: this should never happen
if (debugEnabled())
TRACER.debugInfo("Received unexpected SD ack from DS id: "
+ ackingServer.getServerId() + " ack message: " + ackMsg);
return false;
}
// Get the ack status for the matching server
int ackingServerId = ackingServer.getServerId();
boolean ackReceived = expectedServersAckStatus.get(ackingServerId);
if (ackReceived)
{
// Sanity check: this should never happen
if (debugEnabled())
TRACER.debugInfo("Received unexpected ack from server id: " +
ackingServerId + " ack message: " + ackMsg);
return false;
} else
{
// Mark this ack received for the server
expectedServersAckStatus.put(ackingServerId, true);
numReceivedAcks++;
return numReceivedAcks == safeDataLevel;
}
}
/**
* {@inheritDoc}
*/
public AckMsg createAck(boolean timeout)
{
AckMsg ack = new AckMsg(changeNumber);
if (timeout)
{
// Fill collected errors info
ack.setHasTimeout(true);
// Tell which servers did not send an ack in time
List<Integer> failedServers = new ArrayList<Integer>();
Set<Integer> serverIds = expectedServersAckStatus.keySet();
serversInTimeout = new ArrayList<Integer>(); // Use next loop to fill it
for (Integer serverId : serverIds)
{
boolean ackReceived = expectedServersAckStatus.get(serverId);
if (!ackReceived)
{
failedServers.add(serverId);
serversInTimeout.add(serverId);
}
}
ack.setFailedServers(failedServers);
}
return ack;
}
}