/* This file is part of VoltDB.
* Copyright (C) 2008-2014 VoltDB Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
package org.voltcore.agreement;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import java.util.Queue;
import org.voltcore.agreement.FakeMesh.Message;
import org.voltcore.messaging.Mailbox;
import org.voltcore.messaging.Subject;
import org.voltcore.messaging.VoltMessage;
public class MiniMailbox implements Mailbox {
private long m_HSId;
final private Queue<Message> m_sendQ;
final ArrayList<Deque<VoltMessage>> m_messages = new ArrayList<Deque<VoltMessage>>();
private static final Subject m_defaultSubjects[] = new Subject[] { Subject.FAILURE, Subject.DEFAULT };
MiniMailbox(long HSId, Queue<Message> sendQ)
{
m_HSId = HSId;
m_sendQ = sendQ;
for (Subject s : Subject.values()) {
m_messages.add(s.getId(), new ArrayDeque<VoltMessage>());
}
}
@Override
public void send(long hsId, VoltMessage message) {
message.m_sourceHSId = m_HSId;
m_sendQ.offer(new Message(m_HSId, hsId, message));
}
@Override
public void send(long[] hsIds, VoltMessage message) {
for (long hsId : hsIds) {
send(hsId, message);
}
}
@Override
public void deliver(VoltMessage message) {
deliver(message, false);
}
@Override
public void deliverFront(VoltMessage message) {
deliver(message, true);
}
public void deliver(VoltMessage message, final boolean toFront) {
assert(message != null);
final Deque<VoltMessage> dq = m_messages.get(message.getSubject());
synchronized (this) {
if (toFront) {
dq.offerFirst(message);
} else {
dq.offer(message);
}
this.notify();
}
}
@Override
public VoltMessage recv() {
return recv(m_defaultSubjects);
}
@Override
public VoltMessage recvBlocking() {
return recvBlocking(m_defaultSubjects);
}
@Override
public VoltMessage recvBlocking(long timeout) {
return recvBlocking(m_defaultSubjects, timeout);
}
@Override
public synchronized VoltMessage recv(Subject[] subjects) {
for (Subject s : subjects) {
final Deque<VoltMessage> dq = m_messages.get(s.getId());
assert(dq != null);
VoltMessage m = dq.poll();
if (m != null) {
return m;
}
}
return null;
}
@Override
public synchronized VoltMessage recvBlocking(Subject[] subjects) {
VoltMessage message = null;
while (message == null) {
for (Subject s : subjects) {
final Deque<VoltMessage> dq = m_messages.get(s.getId());
message = dq.poll();
if (message != null) {
return message;
}
}
try {
this.wait();
} catch (InterruptedException e) {
return null;
}
}
return null;
}
@Override
public synchronized VoltMessage recvBlocking(Subject[] subjects, long timeout) {
VoltMessage message = null;
for (Subject s : subjects) {
final Deque<VoltMessage> dq = m_messages.get(s.getId());
message = dq.poll();
if (message != null) {
return message;
}
}
try {
this.wait(timeout);
} catch (InterruptedException e) {
return null;
}
for (Subject s : subjects) {
final Deque<VoltMessage> dq = m_messages.get(s.getId());
message = dq.poll();
if (message != null) {
return message;
}
}
return null;
}
@Override
public long getHSId() {
return m_HSId;
}
@Override
public void setHSId(long hsId) {
m_HSId = hsId;
}
}