Annotation Interface ErrorHandler

@Retention(RUNTIME)
@Target(METHOD)
public @interface ErrorHandler

Marks a method as an error handler for a workflow agent. The annotated method must be static, an ErrorContext as argument and return an instance of ErrorRecoveryResult. It will be invoked when an error occurs during the agent's operation, allowing for custom error handling logic.

Example:

    public interface StoryCreatorWithErrorRecovery {

        @SequenceAgent(outputKey = "story", subAgents = {
                @SubAgent(type = CreativeWriter.class, outputKey = "story"),
                @SubAgent(type = AudienceEditor.class, outputKey = "story"),
                @SubAgent(type = StyleEditor.class, outputKey = "story")
        })
        String write(@V("topic") String topic, @V("style") String style, @V("audience") String audience);

        @ErrorHandler
        static ErrorRecoveryResult errorHandler(ErrorContext errorContext) {
            if (errorContext.agentName().equals("generateStory") &&
                    errorContext.exception() instanceof MissingArgumentException mEx && mEx.argumentName().equals("topic")) {
                errorContext.agenticScope().writeState("topic", "dragons and wizards");
                return ErrorRecoveryResult.retry();
            }
            return ErrorRecoveryResult.throwException();
        }
    }