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Apache CXF

Apache CXF is an open-source services framework (application integration) for building and consuming Simple Object Access Protocol (SOAP) and REST-based web services on the Java platform.

  • Java-based services framework for creating and consuming SOAP and Representational State Transfer (REST) web services (application integration).
  • Implements JAX-WS and JAX-RS APIs for service development and deployment (application integration).
  • Supports multiple data bindings and transport layers, including Hypertext Transfer Protocol (HTTP) and JMS (application integration, messaging).
  • Integrates with security standards such as WS-Security for message-level protection (application security).
  • Provides tooling and runtime support for contract-first and code-first web service development (application development).

More About Apache CXF

Apache CXF is a services framework (application integration) from The Apache Software Foundation for building and consuming web services with a focus on SOAP and REST protocols on the Java platform. It targets scenarios where organizations expose, integrate, or orchestrate services using open standards, enabling interoperability between heterogeneous systems. The framework implements the Java APIs for XML Web Services (JAX-WS) and the Java Application Programming Interface (API) for RESTful Web Services (JAX-RS), giving developers a standardized programming model for service development.

The framework supports both contract-first and code-first development styles (application development). Contract-first workflows start from Web Services Description Language (WSDL) or other service descriptions, while code-first workflows start from Java classes that are later exposed as services. Apache CXF handles the details of request and response processing, including marshalling and unmarshalling between Java objects and XML or JSON representations. It provides multiple data binding options (application integration), such as JAXB, to accommodate different modeling approaches.

Apache CXF includes support for several transport protocols (messaging), with HTTP and JMS among the commonly used options. This allows services to be deployed over standard web application containers or integrated into messaging infrastructures. The framework’s design uses a modular architecture (application framework), where features such as logging, security, and policy handling can be plugged into the processing pipeline.

Security capabilities in Apache CXF cover transport-level and message-level security (application security). The framework integrates with WS-Security for SOAP-based services, enabling features such as message signing and encryption, and can work with existing identity and access infrastructures through configuration of tokens and credentials. Policy support based on WS-Policy helps align service endpoints with enterprise security and reliability requirements.

In enterprise environments, Apache CXF is used to expose business functions as web services, integrate legacy systems, and connect Java applications with external platforms (enterprise integration). It can run in standalone mode or within Java EE / Jakarta EE application servers and servlet containers, fitting into existing deployment and operations practices. Its reliance on established Java and web service standards facilitates interoperability with other tools and runtimes that implement the same specifications.

From a directory and taxonomy perspective, Apache CXF fits into categories such as Java services framework, SOAP and REST web services stack, and application integration middleware. It is relevant wherever organizations standardize on JAX-WS- or JAX-RS-based services, require WS-* protocol support, or seek a modular framework for implementing service-oriented or API-centric architectures.