Chapter 3. Important notes
3.1. AMQ C++
The AMQ C++ messaging API includes classes and methods that are not yet proven and can change in future releases. Be aware that use of these interfaces might require changes to your application code in the future.
These interfaces are marked Unsettled API in the API reference. They include the interfaces in the
proton::ionamespaces and the following interfaces in the
API elements present in header files but not yet documented are considered unsettled and are subject to change.
Interfaces marked Deprecated in the API reference are scheduled for removal in a future release.
This release deprecates the following interfaces in the
void_function0- Use the
workclass or C++11 lambdas instead.
default_container- Use the
url_error- Use a third-party URL library instead.
3.2. Preferred clients
In general, AMQ clients that support the AMQP 1.0 standard are preferred for new application development. However, the following exceptions apply:
- If your implementation requires distributed transactions, use the AMQ Core Protocol JMS client.
- If you require MQTT or STOMP in your domain (for IoT applications, for instance), use community-supported MQTT or STOMP clients.
The considerations above do not necessarily apply if you are already using:
- The AMQ OpenWire JMS client (the JMS implementation previously provided in A-MQ 6)
- The AMQ Core Protocol JMS client (the JMS implementation previously provided with HornetQ)
3.3. Legacy clients
Deprecation of the CMS and NMS APIs
The ActiveMQ CMS and NMS messaging APIs are deprecated in AMQ 7. It is recommended that users of the CMS API migrate to AMQ C++, and users of the NMS API migrate to AMQ .NET. The CMS and NMS APIs might have reduced functionality in AMQ 7.
Deprecation of the legacy AMQ C++ client
The legacy AMQ C++ client (the C++ client previously provided in MRG Messaging) is deprecated in AMQ 7. It is recommended that users of this API migrate to AMQ C++.
The Core API is unsupported
The Artemis Core API client is not supported. This client is distinct from the AMQ Core Protocol JMS client, which is supported.
3.4. Upstream versions
- AMQ C++, AMQ Python, and AMQ Ruby are now based on Qpid Proton 0.32.0.
- AMQ .NET is now based on AMQP.Net Lite 2.4.0.
- AMQ JMS is now based on Qpid JMS 0.53.0.
- AMQ Core Protocol JMS is now based on ActiveMQ Artemis 2.11.0.
- AMQ OpenWire JMS is now based on ActiveMQ 5.11.0.
- AMQ JMS Pool is now based on Pooled JMS 1.1.1.
- AMQ Resource Adapter is now based on AMQP 1.0 Resource Adapter 1.0.2.
- AMQ Spring Boot Starter is now based on AMQP 1.0 JMS Spring Boot 2.3.3.
- AMQ Netty OpenSSL is now based on netty-tcnative 2.0.31.Final.