1 Reply Latest reply on Jul 14, 2016 7:28 PM by Tomohisa igarashi

    Handling errors thrown by producers in camel

    Paul Johansson Newbie

      This case is when i put outbound references inside multicast in camel DSL then i'm unable to handle error thrown by outbound components. Let's say i trying to save file to non existing directory, after that i get FileNotFoundException and finally i can't catch this exception by the code below:

       

      errorHandler(deadLetterChannel("switchyard://ErrorOutbound"));    

      onException(Throwable.class).to("switchyard://ErrorOutbound");

             

      from("switchyard://InboundService")

          .multicast()

              .to("switchyard://Outbound")

              .to("switchyard://Outbound")

          .end()

      .end();


      Noting is going to switchyard://ErrorOutbound. So error handler or onException are unable to handle this, but when i wrap component into directs or pipelines then it start working as i expect.

       

      errorHandler(deadLetterChannel("switchyard://ErrorOutbound"));    

      onException(Throwable.class).to("switchyard://ErrorOutbound");

       

      from("switchyard://InboundService")

          .multicast()

              .pipeline().to("switchyard://Outbound").end()

              .pipeline().to("switchyard://Outbound").end()

          .end()

      .end();

       

      Second case:

       

      errorHandler(deadLetterChannel("switchyard://ErrorOutbound"));    

      onException(Throwable.class).to("switchyard://ErrorOutbound");

       

      from("switchyard://InboundService")

          .multicast()

              .to("direct:Outbound")

              .to("direct:Outbound")

          .end()

      .end();

       

      from("direct:Outbound")

           .to("switchyard://Outbound")


      So my question is: This is the usual case how multicast should be used in switchyard? I didn't found any mention about this in documentation. The version i tested was: EAP 6.1, switchayrd 1.1 and EAP 6.4, switchyard 2.0. Similar code developed in pure camel does not needs this trick to make it work.

       

      errorHandler(deadLetterChannel("file:C:/tmp/zzz?fileName=error-${date:now:yyyyMMddHHmmssSSS}"));

      onException(Throwable.class).to("file:C:/tmp/zzz?fileName=error-${date:now:yyyyMMddHHmmssSSS}");

       

      from("file:C:/tmp/xxx/pending")

           .multicast()

                .to("file:C:/tmp/yyy?autoCreate=false")

                .to("file:C:/tmp/yyy?autoCreate=false")

           .end()

      .end();