Package org.apache.camel.spi

Interface Policy

All Known Subinterfaces:
AuthorizationPolicy, TransactedPolicy
public interface Policy
A strategy capable of applying interceptors to a processor.

Its strongly advised to use an AsyncProcessor as the returned wrapped Processor which ensures the policy works well with the asynchronous routing engine. You can use the

invalid reference 
org.apache.camel.processor.DelegateAsyncProcessor
to easily return an AsyncProcessor and override the AsyncProcessor.process(org.apache.camel.Exchange, org.apache.camel.AsyncCallback) to implement your interceptor logic. And just invoke the super method to continue routing.

Mind that not all frameworks supports asynchronous routing, for example some transaction managers, such as Spring Transaction uses the current thread to store state of the transaction, and thus can't transfer this state to other threads when routing continues asynchronously.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    beforeWrap(Route route, NamedNode definition)
    Hook invoked before the wrap.
    Processor
    wrap(Route route, Processor processor)
    Wraps any applicable interceptors around the given processor.

  • Method Details

    • beforeWrap

      void beforeWrap(Route route, NamedNode definition)
      Hook invoked before the wrap.

      This allows you to do any custom logic before the processor is wrapped. For example to manipulate the

      invalid reference 
      definiton
      .
      Parameters:
      route - the route context
      definition - the processor definition

    • wrap

      Processor wrap(Route route, Processor processor)
      Wraps any applicable interceptors around the given processor.
      Parameters:
      route - the route context
      processor - the processor to be intercepted
      Returns:
      either the original processor or a processor wrapped in one or more processors