The latest Market Data API for Elektron is the strategic Elektron SDK family.
The Elektron SDK Family (C++ and Java Editions) is a suite of modern and open APIs that aim to simplify development through a strong focus on ease of use and standardized access to a broad set of Refinitiv and proprietary content and services via the RSSL connection and OMM message. The capabilities range from low latency/high performance APIs right through to simple streaming Web APIs.
The Elektron SDK stack contains a set of capabilities ranging from low level ‘Transport’ interfaces to very high level content aware stateful interfaces. The SDK consists of two following APIs
You can find more detail regarding the EMA Java from the following resources