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#ifndef QPID_CLUSTER_EVENT_H
#define QPID_CLUSTER_EVENT_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 "types.h"
#include "qpid/RefCountedBuffer.h"
#include "qpid/framing/AMQFrame.h"
#include "qpid/sys/LatencyMetric.h"
#include <sys/uio.h> // For iovec
#include <iosfwd>
#include "types.h"
namespace qpid {
namespace framing {
class AMQBody;
class AMQFrame;
class Buffer;
}
namespace cluster {
/** Header data for a multicast event */
class EventHeader : public ::qpid::sys::LatencyMetricTimestamp {
public:
EventHeader(EventType t=DATA, const ConnectionId& c=ConnectionId(), size_t size=0);
void decode(const MemberId& m, framing::Buffer&);
void encode(framing::Buffer&) const;
EventType getType() const { return type; }
ConnectionId getConnectionId() const { return connectionId; }
MemberId getMemberId() const { return connectionId.getMember(); }
/** Size of payload data, excluding header. */
size_t getSize() const { return size; }
/** Size of header + payload. */
size_t getStoreSize() { return size + HEADER_SIZE; }
bool isCluster() const { return connectionId.getNumber() == 0; }
bool isConnection() const { return connectionId.getNumber() != 0; }
bool isControl() const { return type == CONTROL; }
protected:
static const size_t HEADER_SIZE;
EventType type;
ConnectionId connectionId;
size_t size;
};
/**
* Events are sent to/received from the cluster.
* Refcounted so they can be stored on queues.
*/
class Event : public EventHeader {
public:
Event();
/** Create an event with a buffer that can hold size bytes plus an event header. */
Event(EventType t, const ConnectionId& c, size_t);
/** Create an event copied from delivered data. */
static Event decodeCopy(const MemberId& m, framing::Buffer&);
/** Create a control event. */
static Event control(const framing::AMQBody&, const ConnectionId&);
/** Create a control event. */
static Event control(const framing::AMQFrame&, const ConnectionId&);
// Data excluding header.
char* getData() { return store + HEADER_SIZE; }
const char* getData() const { return store + HEADER_SIZE; }
// Store including header
char* getStore() { return store; }
const char* getStore() const { return store; }
framing::AMQFrame getFrame() const;
operator framing::Buffer() const;
iovec toIovec();
private:
void encodeHeader();
RefCountedBuffer::pointer store;
};
std::ostream& operator << (std::ostream&, const EventHeader&);
}} // namespace qpid::cluster
#endif /*!QPID_CLUSTER_EVENT_H*/
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