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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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 "DtxHandlerImpl.h"
#include <boost/format.hpp>
#include "Broker.h"
#include "BrokerChannel.h"
using namespace qpid::broker;
using namespace qpid::framing;
using std::string;
const int XA_RBROLLBACK(1);
const int XA_RBTIMEOUT(2);
const int XA_HEURHAZ(3);
const int XA_HEURCOM(4);
const int XA_HEURRB(5);
const int XA_HEURMIX(6);
const int XA_RDONLY(7);
const int XA_OK(8);
DtxHandlerImpl::DtxHandlerImpl(CoreRefs& parent) : CoreRefs(parent) {}
// DtxDemarcationHandler:
void DtxHandlerImpl::select()
{
channel.selectDtx();
}
DtxDemarcationEndResult DtxHandlerImpl::end(u_int16_t /*ticket*/,
const string& xid,
bool fail,
bool suspend)
{
try {
if (fail) {
channel.endDtx(xid, true);
if (suspend) {
throw ConnectionException(503, "End and suspend cannot both be set.");
} else {
return DtxDemarcationEndResult(XA_RBROLLBACK);
}
} else {
if (suspend) {
channel.suspendDtx(xid);
} else {
channel.endDtx(xid, false);
}
return DtxDemarcationEndResult(XA_OK);
}
} catch (const DtxTimeoutException& e) {
return DtxDemarcationEndResult(XA_RBTIMEOUT);
}
}
DtxDemarcationStartResult DtxHandlerImpl::start(u_int16_t /*ticket*/,
const string& xid,
bool join,
bool resume)
{
if (join && resume) {
throw ConnectionException(503, "Join and resume cannot both be set.");
}
try {
if (resume) {
channel.resumeDtx(xid);
} else {
channel.startDtx(xid, broker.getDtxManager(), join);
}
return DtxDemarcationStartResult(XA_OK);
} catch (const DtxTimeoutException& e) {
return DtxDemarcationStartResult(XA_RBTIMEOUT);
}
}
// DtxCoordinationHandler:
DtxCoordinationPrepareResult DtxHandlerImpl::prepare(u_int16_t /*ticket*/,
const string& xid)
{
try {
bool ok = broker.getDtxManager().prepare(xid);
return DtxCoordinationPrepareResult(ok ? XA_OK : XA_RBROLLBACK);
} catch (const DtxTimeoutException& e) {
return DtxCoordinationPrepareResult(XA_RBTIMEOUT);
}
}
DtxCoordinationCommitResult DtxHandlerImpl::commit(u_int16_t /*ticket*/,
const string& xid,
bool onePhase)
{
try {
bool ok = broker.getDtxManager().commit(xid, onePhase);
return DtxCoordinationCommitResult(ok ? XA_OK : XA_RBROLLBACK);
} catch (const DtxTimeoutException& e) {
return DtxCoordinationCommitResult(XA_RBTIMEOUT);
}
}
DtxCoordinationRollbackResult DtxHandlerImpl::rollback(u_int16_t /*ticket*/,
const string& xid )
{
try {
broker.getDtxManager().rollback(xid);
return DtxCoordinationRollbackResult(XA_OK);
} catch (const DtxTimeoutException& e) {
return DtxCoordinationRollbackResult(XA_RBTIMEOUT);
}
}
DtxCoordinationRecoverResult DtxHandlerImpl::recover(u_int16_t /*ticket*/,
bool /*startscan*/,
bool /*endscan*/ )
{
//TODO: what do startscan and endscan actually mean?
// response should hold on key value pair with key = 'xids' and
// value = sequence of xids
// until sequences are supported (0-10 encoding), an alternate
// scheme is used for testing:
//
// key = 'xids' and value = a longstr containing shortstrs for each xid
//
// note that this restricts the length of the xids more than is
// strictly 'legal', but that is ok for testing
std::set<std::string> xids;
broker.getStore().collectPreparedXids(xids);
uint size(0);
for (std::set<std::string>::iterator i = xids.begin(); i != xids.end(); i++) {
size += i->size() + 1/*shortstr size*/;
}
char* bytes = static_cast<char*>(::alloca(size + 4/*longstr size*/));
Buffer wbuffer(bytes, size + 4/*longstr size*/);
wbuffer.putLong(size);
for (std::set<std::string>::iterator i = xids.begin(); i != xids.end(); i++) {
wbuffer.putShortString(*i);
}
Buffer rbuffer(bytes, size + 4/*longstr size*/);
string data;
rbuffer.getLongString(data);
FieldTable response;
response.setString("xids", data);
return DtxCoordinationRecoverResult(response);
}
void DtxHandlerImpl::forget(u_int16_t /*ticket*/,
const string& xid)
{
//Currently no heuristic completion is supported, so this should never be used.
throw ConnectionException(503, boost::format("Forget is invalid. Branch with xid %1% not heuristically completed!") % xid);
}
DtxCoordinationGetTimeoutResult DtxHandlerImpl::getTimeout(const string& xid)
{
uint32_t timeout = broker.getDtxManager().getTimeout(xid);
return DtxCoordinationGetTimeoutResult(timeout);
}
void DtxHandlerImpl::setTimeout(u_int16_t /*ticket*/,
const string& xid,
u_int32_t timeout)
{
broker.getDtxManager().setTimeout(xid, timeout);
}
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