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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 "qpid/broker/DtxManager.h"
#include "qpid/broker/DtxTimeout.h"
#include "qpid/framing/reply_exceptions.h"
#include "qpid/framing/StructHelper.h"
#include "qpid/log/Statement.h"
#include "qpid/sys/Timer.h"
#include "qpid/ptr_map.h"
#include <boost/format.hpp>
#include <boost/bind.hpp>
#include <boost/function.hpp>
#include <iostream>
using boost::intrusive_ptr;
using qpid::sys::Mutex;
using qpid::ptr_map_ptr;
using namespace qpid::broker;
using namespace qpid::framing;
namespace {
typedef boost::function0<void> FireFunction;
struct DtxCleanup : public qpid::sys::TimerTask
{
FireFunction fireFunction;
DtxCleanup(uint32_t timeout, FireFunction f);
void fire();
};
DtxCleanup::DtxCleanup(uint32_t _timeout, FireFunction f)
: TimerTask(qpid::sys::Duration(_timeout * qpid::sys::TIME_SEC),"DtxCleanup"), fireFunction(f){}
void DtxCleanup::fire()
{
try {
fireFunction();
} catch (qpid::ConnectionException& /*e*/) {
//assume it was explicitly cleaned up after a call to prepare, commit or rollback
}
}
}
//DtxManager::DtxManager(qpid::sys::Timer& t) : store(0), timer(&t) {}
DtxManager::DtxManager(qpid::sys::Timer& t) : asyncTxnStore(0), timer(&t) {}
DtxManager::~DtxManager() {}
void DtxManager::start(const std::string& xid, DtxBuffer::shared_ptr ops)
{
createWork(xid)->add(ops);
}
void DtxManager::join(const std::string& xid, DtxBuffer::shared_ptr ops)
{
getWork(xid)->add(ops);
}
void DtxManager::recover(const std::string& xid, std::auto_ptr<TPCTransactionContext> txn, DtxBuffer::shared_ptr ops)
{
createWork(xid)->recover(txn, ops);
}
bool DtxManager::prepare(const std::string& xid)
{
QPID_LOG(debug, "preparing: " << convert(xid));
try {
return getWork(xid)->prepare();
} catch (DtxTimeoutException& e) {
remove(xid);
throw e;
}
}
bool DtxManager::commit(const std::string& xid, bool onePhase)
{
QPID_LOG(debug, "committing: " << convert(xid));
try {
bool result = getWork(xid)->commit(onePhase);
remove(xid);
return result;
} catch (DtxTimeoutException& e) {
remove(xid);
throw e;
}
}
void DtxManager::rollback(const std::string& xid)
{
QPID_LOG(debug, "rolling back: " << convert(xid));
try {
getWork(xid)->rollback();
remove(xid);
} catch (DtxTimeoutException& e) {
remove(xid);
throw e;
}
}
DtxWorkRecord* DtxManager::getWork(const std::string& xid)
{
Mutex::ScopedLock locker(lock);
WorkMap::iterator i = work.find(xid);
if (i == work.end()) {
throw NotFoundException(QPID_MSG("Unrecognised xid " << convert(xid)));
}
return ptr_map_ptr(i);
}
bool DtxManager::exists(const std::string& xid) {
Mutex::ScopedLock locker(lock);
return work.find(xid) != work.end();
}
void DtxManager::remove(const std::string& xid)
{
Mutex::ScopedLock locker(lock);
WorkMap::iterator i = work.find(xid);
if (i == work.end()) {
throw NotFoundException(QPID_MSG("Unrecognised xid " << convert(xid)));
} else {
work.erase(i);
}
}
DtxWorkRecord* DtxManager::createWork(const std::string& xid)
{
Mutex::ScopedLock locker(lock);
WorkMap::iterator i = work.find(xid);
if (i != work.end()) {
throw NotAllowedException(QPID_MSG("Xid " << convert(xid) << " is already known (use 'join' to add work to an existing xid)"));
} else {
std::string ncxid = xid; // Work around const correctness problems in ptr_map.
// return ptr_map_ptr(work.insert(ncxid, new DtxWorkRecord(ncxid, store)).first);
return ptr_map_ptr(work.insert(ncxid, new DtxWorkRecord(ncxid, asyncTxnStore)).first);
}
}
void DtxManager::setTimeout(const std::string& xid, uint32_t secs)
{
DtxWorkRecord* record = getWork(xid);
intrusive_ptr<DtxTimeout> timeout = record->getTimeout();
if (timeout.get()) {
if (timeout->timeout == secs) return;//no need to do anything further if timeout hasn't changed
timeout->cancel();
}
timeout = intrusive_ptr<DtxTimeout>(new DtxTimeout(secs, *this, xid));
record->setTimeout(timeout);
timer->add(timeout);
}
uint32_t DtxManager::getTimeout(const std::string& xid)
{
intrusive_ptr<DtxTimeout> timeout = getWork(xid)->getTimeout();
return !timeout ? 0 : timeout->timeout;
}
void DtxManager::timedout(const std::string& xid)
{
Mutex::ScopedLock locker(lock);
WorkMap::iterator i = work.find(xid);
if (i == work.end()) {
QPID_LOG(warning, "Transaction timeout failed: no record for xid");
} else {
ptr_map_ptr(i)->timedout();
//TODO: do we want to have a timed task to cleanup, or can we rely on an explicit completion?
//timer->add(new DtxCleanup(60*30/*30 mins*/, boost::bind(&DtxManager::remove, this, xid)));
}
}
//void DtxManager::setStore (TransactionalStore* _store)
void DtxManager::setStore (AsyncTransactionalStore* const _ats)
{
// store = _store;
asyncTxnStore = _ats;
}
std::string DtxManager::convert(const qpid::framing::Xid& xid)
{
qpid::framing::StructHelper helper;
std::string encoded;
helper.encode(xid, encoded);
return encoded;
}
qpid::framing::Xid DtxManager::convert(const std::string& xid)
{
qpid::framing::StructHelper helper;
qpid::framing::Xid decoded;
helper.decode(decoded, xid);
return decoded;
}
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