/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
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; version 2 of the License.
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 com.bigdata.quorum;
import java.util.UUID;
/**
* Event implementation class.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
*/
public class QCE implements QuorumStateChangeEvent {
private final QuorumStateChangeEventEnum eventType;
private final UUID[] downstreamOldAndNew;
private final Long lastCommitTimeConsensus;
private final Long token;
private final UUID leaderId;
public QCE(final QuorumStateChangeEventEnum eventType) {
this(eventType, null/* downstreamOldAndNew */,
null/* lastCommitTimeConsensus */, null/* token */, null/* leaderId */);
}
public QCE(final QuorumStateChangeEventEnum eventType,//
final UUID[] downstreamOldAndNew,//
final Long lastCommitTimeConsensus,//
final Long token,//
final UUID leaderId//
) {
if (eventType == null)
throw new IllegalArgumentException();
switch (eventType) {
case PIPELINE_CHANGE:
if (downstreamOldAndNew == null)
throw new IllegalArgumentException();
if (downstreamOldAndNew.length != 2)
throw new IllegalArgumentException();
break;
case CONSENSUS:
if (lastCommitTimeConsensus == null)
throw new IllegalArgumentException();
break;
case QUORUM_MEET:
if (token == null)
throw new IllegalArgumentException();
if (leaderId == null)
throw new IllegalArgumentException();
break;
}
this.eventType = eventType;
this.downstreamOldAndNew = downstreamOldAndNew;
this.lastCommitTimeConsensus = lastCommitTimeConsensus;
this.token = token;
this.leaderId = leaderId;
}
@Override
public QuorumStateChangeEventEnum getEventType() {
return eventType;
}
@Override
public UUID[] getDownstreamOldAndNew() {
if (eventType != QuorumStateChangeEventEnum.PIPELINE_CHANGE)
throw new UnsupportedOperationException();
return downstreamOldAndNew;
}
@Override
public long getLastCommitTimeConsensus() {
if (eventType != QuorumStateChangeEventEnum.CONSENSUS)
throw new UnsupportedOperationException();
return lastCommitTimeConsensus.longValue();
}
@Override
public long getToken() {
if (eventType != QuorumStateChangeEventEnum.QUORUM_MEET)
throw new UnsupportedOperationException();
return token.longValue();
}
@Override
public UUID getLeaderId() {
if (eventType != QuorumStateChangeEventEnum.QUORUM_MEET)
throw new UnsupportedOperationException();
return leaderId;
}
public String toString() {
return "QuorumStateChangeEvent"
+ "{type="
+ eventType
+ (eventType == QuorumStateChangeEventEnum.PIPELINE_CHANGE ? ",oldDownstreamId="
+ downstreamOldAndNew[0]
+ ",newDownstreamId="
+ downstreamOldAndNew[1]
: "")
+ (eventType == QuorumStateChangeEventEnum.CONSENSUS ? ",lastCommitTime="
+ lastCommitTimeConsensus
: "") //
+ (eventType == QuorumStateChangeEventEnum.QUORUM_MEET ? ",token="
+ token + ",leaderId=" + leaderId
: "") //
+ "}"//
;
}
}