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  • The JPA extension for O/R mapping
  • The Geronimo Transaction Manager extension for transactional support in the runtime
  • The HOWL-based Persistent Store extension for high-throughput persistence of conversational state

More detail can be found in the Extensions Architecture section, but a few high-level best practices for designing extensions can be listed here:

  • Make sure you are familiar with SCA 1.0 Assembly and the SCA Java 1.0 programming model. Specifications can be found at www.osoa.org.
  • Never reference any classes in core. These classes are implementation-specific and subject to change; they are not part of the public SPI contract.
  • Use autowire when assembling extension components.

Federation