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