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https://github.com/Telecominfraproject/wlan-cloud-lib-cppkafka.git
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110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/*
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* Copyright (c) 2017, Matias Fontanini
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef CPPKAFKA_TOPIC_H
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#define CPPKAFKA_TOPIC_H
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#include <string>
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#include <memory>
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#include <boost/optional.hpp>
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#include <librdkafka/rdkafka.h>
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#include "macros.h"
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namespace cppkafka {
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/**
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* \brief Represents a rdkafka topic
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*
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* This is a simple wrapper over a rd_kafka_topic_t*
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*/
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class CPPKAFKA_API Topic {
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public:
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/**
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* \brief Creates a Topic object that doesn't take ownership of the handle
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*
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* \param handle The handle to be used
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*/
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static Topic make_non_owning(rd_kafka_topic_t* handle);
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/**
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* \brief Constructs an empty topic
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*
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* Note that using any methods except Topic::get_handle on an empty topic is undefined
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* behavior
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*/
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Topic();
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/**
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* \brief Constructs a topic using a handle
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*
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* This will take ownership of the handle
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*
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* \param handle The handle to be used
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*/
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Topic(rd_kafka_topic_t* handle);
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/**
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* Returns the topic name
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*/
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std::string get_name() const;
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/**
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* \brief Check if the partition is available
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*
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* This translates into a call to rd_kafka_topic_partition_available
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*
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* \param partition The partition to check
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*/
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bool is_partition_available(int partition) const;
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/**
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* Indicates whether this topic is valid (not null)
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*/
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explicit operator bool() const {
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return handle_ != nullptr;
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}
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/**
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* Returns the rdkakfa handle
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*/
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rd_kafka_topic_t* get_handle() const;
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private:
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using HandlePtr = std::unique_ptr<rd_kafka_topic_t, decltype(&rd_kafka_topic_destroy)>;
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struct NonOwningTag { };
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Topic(rd_kafka_topic_t* handle, NonOwningTag);
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HandlePtr handle_;
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};
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} // cppkafka
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#endif // CPPKAFKA_TOPIC_H
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