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/*
*
* 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 "Event.h"
#include "Cpg.h"
#include "qpid/framing/Buffer.h"
#include "qpid/framing/AMQFrame.h"
#include <ostream>
#include <iterator>
#include <algorithm>
namespace qpid {
namespace cluster {
using framing::Buffer;
const size_t EventHeader::HEADER_SIZE =
sizeof(uint8_t) + // type
sizeof(uint64_t) + // connection pointer only, CPG provides member ID.
sizeof(uint32_t) // payload size
#ifdef QPID_LATENCY_METRIC
+ sizeof(int64_t) // timestamp
#endif
;
EventHeader::EventHeader(EventType t, const ConnectionId& c, size_t s)
: type(t), connectionId(c), size(s), sequence(0) {}
Event::Event() {}
Event::Event(EventType t, const ConnectionId& c, size_t s)
: EventHeader(t,c,s), store(RefCountedBuffer::create(s+HEADER_SIZE))
{}
void EventHeader::decode(const MemberId& m, framing::Buffer& buf) {
if (buf.available() <= HEADER_SIZE)
throw Exception("Not enough for multicast header");
type = (EventType)buf.getOctet();
if(type != DATA && type != CONTROL)
throw Exception("Invalid multicast event type");
connectionId = ConnectionId(m, reinterpret_cast<Connection*>(buf.getLongLong()));
size = buf.getLong();
#ifdef QPID_LATENCY_METRIC
latency_metric_timestamp = buf.getLongLong();
#endif
}
Event Event::decodeCopy(const MemberId& m, framing::Buffer& buf) {
Event e;
e.decode(m, buf); // Header
if (buf.available() < e.size)
throw Exception("Not enough data for multicast event");
e.store = RefCountedBuffer::create(e.size + HEADER_SIZE);
memcpy(e.getData(), buf.getPointer() + buf.getPosition(), e.size);
return e;
}
Event Event::control(const framing::AMQBody& body, const ConnectionId& cid) {
framing::AMQFrame f(body);
Event e(CONTROL, cid, f.encodedSize());
Buffer buf(e);
f.encode(buf);
return e;
}
iovec Event::toIovec() {
encodeHeader();
iovec iov = { const_cast<char*>(getStore()), getStoreSize() };
return iov;
}
void EventHeader::encode(Buffer& b) const {
b.putOctet(type);
b.putLongLong(reinterpret_cast<uint64_t>(connectionId.getPointer()));
b.putLong(size);
#ifdef QPID_LATENCY_METRIC
b.putLongLong(latency_metric_timestamp);
#endif
}
// Encode my header in my buffer.
void Event::encodeHeader () {
Buffer b(getStore(), HEADER_SIZE);
encode(b);
assert(b.getPosition() == HEADER_SIZE);
}
Event::operator Buffer() const {
return Buffer(const_cast<char*>(getData()), getSize());
}
static const char* EVENT_TYPE_NAMES[] = { "data", "control" };
std::ostream& operator << (std::ostream& o, const EventHeader& e) {
o << "[event " << e.getConnectionId() << "/" << e.getSequence()
<< " " << EVENT_TYPE_NAMES[e.getType()]
<< " " << e.getSize() << " bytes]";
return o;
}
}} // namespace qpid::cluster
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