RE: [HAPI-devel] Newbie implementing ca.uhn.hl7v2.app.Application

[Guevara, A. <Ale...@uh...>]

Hi John,

In addition to Bryan's response, the code fragments below show how to =
create

ACK and NACK messages.

Alex6


    private boolean sendAck( HL7LLPWriter so, String theMessage ) {
        boolean retVal =3D false;
       =20
        try {
            //send Response
            Segment msh =3D myHL7Parser.getCriticalResponseData( =
theMessage );
            Message ack =3D DefaultApplication.makeACK(msh);

            String rawAck =3D myHL7Parser.encode(ack);

            ourLog.debug( "Send ACK : " + rawAck );
            so.writeMsg( rawAck );

            retVal =3D true;
        }
        catch (Exception e) {
            ourLog.error("Write Response Exception: ", e);
        }
        return retVal;
    }
   =20
    private boolean sendNack( HL7LLPWriter so, String theMessage ) {
        boolean retVal =3D false;
       =20
        try {
            //send Response
            Segment msh =3D myHL7Parser.getCriticalResponseData( =
theMessage );
            Message nack =3D DefaultApplication.makeACK(msh);
           =20
            //populate MSA and ERR with generic error ...=20
            Segment msaSegment =3D (Segment) nack.get("MSA");
            Terser.set( msaSegment, 1, 0, 1, 1, "AR" );
            Terser.set( msaSegment, 3, 0, 1, 1, "Unable to forward =
message
to producer" );


            //populate ERR segment if it exists (may not depending on
version)
            Structure errSegment =3D nack.get("ERR");
            if (errSegment !=3D null) {
                Segment err =3D (Segment) errSegment;
                Terser.set(err, 1, 0, 4, 1, "207");
                Terser.set(err, 1, 0, 4, 2, "Application Internal =
Error");
                Terser.set(err, 1, 0, 4, 3, "HL70357");
            }
           =20
            String rawAck =3D myHL7Parser.encode(nack);

            ourLog.debug( "Send NACK : " + rawAck );
            so.writeMsg( rawAck );

            retVal =3D true;
        }
        catch (Exception e) {
            ourLog.error("Write Response Exception: ", e);
        }
        return retVal;
    }

-----Original Message-----
From: Tripp, Bryan [mailto:Bry...@uh...]=20
Sent: May 25, 2004 10:55 AM
To: 'John Thaemlitz'; Hl7...@li...
Subject: RE: [HAPI-devel] Newbie implementing =
ca.uhn.hl7v2.app.Application

Hi John,=20

You just have to fill in ACK message fields according to whatever specs =
you
are implementing.  For example whether it's an accept or reject depends =
on
the value of MSA-1.  DefaultApplication.makeACK() will get you off to a =
good
start by filling in all the invariant fields (e.g. ack ID, message =
time,
message control ID).  The rest depends on the results of your =
processing and
on the system you're interacting with. =20

Regards,=20
Bryan=20

> -----Original Message-----
> From: John Thaemlitz [mailto:jo...@rs...]
> Sent: May 25, 2004 9:52 AM
> To: Hl7...@li...
> Subject: [HAPI-devel] Newbie implementing =
ca.uhn.hl7v2.app.Application
>=20
>=20
> I'm a newbie and a little confused about what the right process is.
>=20
> I'm getting my processMessage method called, but I'm not sure how to
> construct/return an Ack.  What's the basic idea here.  I can create a
> silly ACK with ACK ack =3D new ACK();  But how do I assing an accept =
or
> reject ACK.
>=20
> Thanks,
>=20
> JohnPT
>=20
>=20
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>=20


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for the sole use of the intended recipient. Any review or distribution
by anyone other than the person for whom it was originally intended is
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delete all copies. Opinions, conclusions or other information contained =
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