What are Providers? 

  • Providers are a simply a way of extending and customizing the JAX-RS runtime 
  • Types of providers 
    • Entity providers: control the mapping of data representations (like XML, JSON, CSV) to their Java object equivalents. 
    • Context providers: control the context that resources can access via @Context annotations 
    • Exception providers: control the mapping of Java exceptions to a JAX-RS Response instance 
  • All providers must be identified by the @Provider annotation 
    • You can create your own providers – Filters and Interceptors are your own custom providers

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