SimpleAmqpClient is an easy-to-use C++ wrapper around the rabbitmq-c C library. It derives inspiration from the puka AMQP library in that it abstracts away the underlying AMQP wire concept of channels and uses them as an error/consumer scope. This should make writing simple single-threaded AMQP-enabled apps easy.
Known to work in the following environments: - Windows 7 (MSVC 10, Win64, Win32). Likely to work in others, but has not been tested - Linux (RHEL 6.0, GCC-4.4.5, 32 and 64 bit). Likely to work on other configurations, but has not been tested - Mac OS X (10.7, 10.6, gcc-4.2, 32 and 64-bit). Likely to work on older version, but has not been tested
- boost-1.47.0 or newer (uses chrono, system internally in addition to other header based libraries such as sharedptr and noncopyable)
- rabbitmq-c you'll need version 0.4.1 or better.
- cmake 2.8+ what is needed for the build system
- Doxygen OPTIONAL only necessary to generate API documentation
This is a typical cmake project, it should work like most typical cmake projects:
In a sibiling directory to where you extracted the source code: mkdir simpleamqpclient-build cd simpleamqpclient-build cmake ../SimpleAmqpClient
Then use your the appropriate build utility to build the library (make, msbuild)
Interesting targets + test - will build and run the tests + install - will install the library and headers to whatever CMAKE_INSTALL_PREFIX is defined to + doc - will generate API documentation if you have doxygen setup
+ The test google-test based test suite can be enabled by passing
Using the library¶
Will include all the headers necessary to use the library. The corresponding library is SimpleAmqpClient
The main interface to the library is the AmqpClient::Channel class. It represents a connection to an AMQP broker, the connection is established on contruction of an instance of this class.
AmqpClient::Channel::ptr_t connection = AmqpClient::Channel::Create("localhost");
All classes have a typedef ptr_t which is equivalent to boost::shared_ptr<> of the containing class. All classes also have a Create() method does the job creating a new ptr_t using boost::make_shared<>(). It is recommended that you use these methods to construct objects in the library.
Commands dealing with declaring/binding/unbinding/deleting exchanges and queues are all done with the above AmqpClient::Channel object. If one of these commands fails to complete a AmqpClient::ChannelException will be thrown, which can be caught and the AmqpClient::Channel object is still useable. If a more severe error occurs a AmqpClient::ConnectionException or AmqpClient::AmqpResponseLibraryException maybe thrown, in which case the Channel object is no longer in a usable state and further use will only generate more exceptions.
Consuming messages is done by setting up a consumer using the BasicConsume method. This method returns a consumer tag that should be used with the BasicConsumeMessage BasicQos, BasicRecover, and BasicCancel.
std::string consumer_tag = channel->BasicConsume("my_queue", ""); Envelope::ptr_t envelope = channel->BasicConsumeMessage(consumer_tag); envelope = channel->BasicConsumeMessage(consumer_tag); channel->BasicCancel(consumer_tag);
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