Package io.nitric.faas

Class AbstractTriggerContext

  • Direct Known Subclasses:
    HttpTriggerContext, TopicTriggerContext
    public abstract class AbstractTriggerContext
extends Object

    Provides an abstract Nitric FaaS trigger context class.

    The example below illustrates unwrapping the FaaS trigger context object. 

    
 package com.example;

 import io.nitric.faas.Faas;
 import io.nitric.faas.Trigger;
 import io.nitric.faas.TriggerContext;
 import io.nitric.faas.NitricFunction;
 import io.nitric.faas.Response;

 public class HelloWorld implements NitricFunction {

     public Response handle(Trigger trigger) {
         if (trigger.getContext().isHttp()) {
             var httpContext = trigger.getContext().asHttp();
             // Extract HTTP context metadata
         } else if (trigger.getContext().isTopic()) {
             var topicContext = trigger.getContext().asTopic();
             // Extract Topic context metadata
         }

         return trigger.buildResponse("Hello World");
     }

     public static void main(String... args) {
         Faas.start(new HelloWorld());
     }
 }
    See Also:
    HttpTriggerContext, TopicTriggerContext

    • Constructor Detail

      • AbstractTriggerContext

        public AbstractTriggerContext()

    • Method Detail

      • isHttp

        public final boolean isHttp()
        Returns:
        If the context is for a HTTP Trigger

      • isTopic

        public final boolean isTopic()
        Returns:
        If the context is for a Topic Trigger

      • asHttp

        public final HttpTriggerContext asHttp()
        Returns:
        The Context as a HttpRequestTriggerContext or null if is not a trigger from a http request

      • asTopic

        public final TopicTriggerContext asTopic()
        Returns:
        The Context as a TopicTriggerContext or null if is not a trigger for a topic

      • buildTriggerContext

        protected static AbstractTriggerContext buildTriggerContext​(io.nitric.proto.faas.v1.TriggerRequest trigger)
        Create a new TriggerContext from the on-wire TriggerRequest from the Nitric membrane
        Returns:
        The translated TriggerContext or null if the TriggerRequest does not contain context