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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 "QueuePolicy.h"
#include "qpid/framing/FieldValue.h"
using namespace qpid::broker;
using namespace qpid::framing;
QueuePolicy::QueuePolicy(uint32_t _maxCount, uint64_t _maxSize) :
maxCount(_maxCount), maxSize(_maxSize), count(0), size(0) {}
QueuePolicy::QueuePolicy(const FieldTable& settings) :
maxCount(getInt(settings, maxCountKey, 0)),
maxSize(getInt(settings, maxSizeKey, 0)), count(0), size(0) {}
void QueuePolicy::enqueued(uint64_t _size)
{
if (maxCount) count++;
if (maxSize) size += _size;
}
void QueuePolicy::dequeued(uint64_t _size)
{
if (maxCount) count--;
if (maxSize) size -= _size;
}
bool QueuePolicy::limitExceeded()
{
return (maxSize && size > maxSize) || (maxCount && count > maxCount);
}
void QueuePolicy::update(FieldTable& settings)
{
if (maxCount) settings.setInt(maxCountKey, maxCount);
if (maxSize) settings.setInt(maxSizeKey, maxSize);
}
int QueuePolicy::getInt(const FieldTable& settings, const std::string& key, int defaultValue)
{
//Note: currently field table only contain signed 32 bit ints, which
// restricts the values that can be set on the queue policy.
try {
return settings.getInt(key);
} catch (FieldValueException& ignore) {
return defaultValue;
}
}
const std::string QueuePolicy::maxCountKey("qpid.max_count");
const std::string QueuePolicy::maxSizeKey("qpid.max_size");
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