Creating a branch for experimenting with some ideas for JMS client.rajith_jms_client

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/rajith_jms_client@1128369 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 171 insertions, 0 deletions

diff --git a/qpid/cpp/src/qpid/broker/DtxManager.cpp b/qpid/cpp/src/qpid/broker/DtxManager.cpp
new file mode 100644
index 0000000000..3caa41c3f4
--- /dev/null
+++ b/qpid/cpp/src/qpid/broker/DtxManager.cpp
@@ -0,0 +1,171 @@
+/*
+ *
+ * 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/log/Statement.h"
+#include "qpid/sys/Timer.h"
+#include "qpid/ptr_map.h"
+
+#include <boost/format.hpp>
+#include <iostream>
+
+using boost::intrusive_ptr;
+using qpid::sys::Mutex;
+using qpid::ptr_map_ptr;
+using namespace qpid::broker;
+using namespace qpid::framing;
+
+DtxManager::DtxManager(qpid::sys::Timer& t) : store(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: " << 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: " << 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: " << 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 " << xid));
+    }
+    return ptr_map_ptr(i);
+}
+
+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 " << xid));
+    } else {
+        work.erase(i);
+    }
+}
+
+DtxWorkRecord* DtxManager::createWork(std::string xid)
+{
+    Mutex::ScopedLock locker(lock); 
+    WorkMap::iterator i = work.find(xid);
+    if (i != work.end()) {
+        throw NotAllowedException(QPID_MSG("Xid " << xid << " is already known (use 'join' to add work to an existing xid)"));
+    } else {
+      return ptr_map_ptr(work.insert(xid, new DtxWorkRecord(xid, store)).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(intrusive_ptr<TimerTask>(new DtxCleanup(60*30/*30 mins*/, *this, xid)));
+    }
+}
+
+DtxManager::DtxCleanup::DtxCleanup(uint32_t _timeout, DtxManager& _mgr, const std::string& _xid) 
+    : TimerTask(qpid::sys::Duration(_timeout * qpid::sys::TIME_SEC),"DtxCleanup"), mgr(_mgr), xid(_xid) {}
+
+void DtxManager::DtxCleanup::fire()
+{
+    try {
+        mgr.remove(xid);
+    } catch (ConnectionException& /*e*/) {
+        //assume it was explicitly cleaned up after a call to prepare, commit or rollback
+    }
+}
+
+void DtxManager::setStore (TransactionalStore* _store)
+{
+    store = _store;
+}