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#ifndef QPID_CLUSTER_ERRORCHECK_H
#define QPID_CLUSTER_ERRORCHECK_H
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "qpid/cluster/MemberSet.h"
#include "qpid/cluster/Multicaster.h"
#include "qpid/framing/enum.h"
#include "qpid/framing/SequenceNumber.h"
#include <boost/function.hpp>
#include <deque>
#include <set>
namespace qpid {
namespace cluster {
struct EventFrame;
class Cluster;
class Multicaster;
class Connection;
/**
* Error checking logic.
*
* When an error occurs queue up frames until we can determine if all
* nodes experienced the error. If not, we shut down.
*/
class ErrorCheck
{
public:
typedef framing::cluster::ErrorType ErrorType;
typedef framing::SequenceNumber SequenceNumber;
ErrorCheck(Cluster&);
/** A local error has occured */
void error(Connection&, ErrorType, SequenceNumber frameSeq, const MemberSet&,
const std::string& msg);
/** Called when a frame is delivered */
void delivered(const EventFrame&);
/**@pre canProcess **/
EventFrame getNext();
bool canProcess() const { return type == NONE && !frames.empty(); }
bool isUnresolved() const { return type != NONE; }
/** Respond to an error check saying we had no error. */
void respondNone(const MemberId&, uint8_t type, SequenceNumber frameSeq);
private:
static const ErrorType NONE = framing::cluster::ERROR_TYPE_NONE;
typedef std::deque<EventFrame> FrameQueue;
FrameQueue::iterator review(const FrameQueue::iterator&);
void checkResolved();
Cluster& cluster;
Multicaster& mcast;
FrameQueue frames;
MemberSet unresolved;
SequenceNumber frameSeq;
ErrorType type;
Connection* connection;
std::string message;
};
}} // namespace qpid::cluster
#endif /*!QPID_CLUSTER_ERRORCHECK_H*/
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