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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.
*
*/
#ifndef _Subscription_
#define _Subscription_
#include "SubscriptionManager.h"
#include <qpid/client/Dispatcher.h>
#include <qpid/client/Session_0_10.h>
#include <qpid/client/MessageListener.h>
#include <set>
#include <sstream>
namespace qpid {
namespace client {
SubscriptionManager::SubscriptionManager(Session_0_10& s)
: dispatcher(s), session(s), messages(1), bytes(UNLIMITED), autoStop(true)
{}
std::string SubscriptionManager::uniqueTag(const std::string& tag) {
// Make unique tag.
int count=1;
std::string unique=tag;
while (subscriptions.find(tag) != subscriptions.end()) {
std::ostringstream s;
s << tag << "-" << count++;
unique=s.str();
}
subscriptions.insert(unique);
return tag;
}
std::string SubscriptionManager::subscribe(
MessageListener& listener, const std::string& q, const std::string& t)
{
std::string tag=uniqueTag(t);
using namespace arg;
session.messageSubscribe(arg::queue=q, arg::destination=tag);
flowLimits(tag, messages, bytes);
dispatcher.listen(tag, &listener);
return tag;
}
void SubscriptionManager::flowLimits(
const std::string& tag, uint32_t messages, uint32_t bytes) {
session.messageFlow(tag, 0, messages);
session.messageFlow(tag, 1, bytes);
}
void SubscriptionManager::flowLimits(uint32_t m, uint32_t b) {
messages=m;
bytes=b;
}
void SubscriptionManager::cancel(const std::string tag)
{
if (subscriptions.erase(tag)) {
dispatcher.cancel(tag);
session.messageCancel(tag);
if (autoStop && subscriptions.empty()) stop();
}
}
void SubscriptionManager::run(bool autoStop_)
{
autoStop=autoStop_;
if (autoStop && subscriptions.empty()) return;
dispatcher.run();
}
void SubscriptionManager::stop()
{
dispatcher.stop();
}
}} // namespace qpid::client
#endif
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