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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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <activemq/util/Config.h>
namespace activemq {
namespace util {
class AMQCPP_API Usage {
virtual ~Usage();
* Waits forever for more space to be returned to this Usage Manager.
virtual void waitForSpace() = 0;
* Waits for more space to be returned to this Usage Manager, times out
* when the given time span in milliseconds elapses.
* @param timeout The time to wait for more space.
virtual void waitForSpace(unsigned int timeout) = 0;
* Tries to increase the usage by value amount but blocks if this object is
* currently full.
* @param value Amount of usage in bytes to add.
virtual void enqueueUsage(unsigned long long value) = 0;
* Increases the usage by the value amount
* @param value Amount of usage to add.
virtual void increaseUsage(unsigned long long value) = 0;
* Decreases the usage by the value amount.
* @param value Amount of space to return to the pool
virtual void decreaseUsage(unsigned long long value) = 0;
* Returns true if this Usage instance is full, i.e. Usage >= 100%
* @return true if Usage is at the Full point.
virtual bool isFull() const = 0;
#endif /* _ACTIVEMQ_UTIL_USAGE_H_ */