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Re: [HAPI-devel] Trouble receiving messages usubg SendAndReceiveaMessage example
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From: Tom C. <tc...@ex...> - 2017-08-03 11:00:42
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Here's a patch against the current trunk that adds this support.
Using a modified version of the send and receive example with a new
build is easy:
HL7Service server = context.newServer(4567, false, true); //
port, tls, accept all
My server is now able to receive these unsolicited ACKs
Tom
On 02/08/17 10:34, Jens Villadsen wrote:
> Unsolicited ACK's are a bit weird to receive. While I can agree that
> it would be nice if the behavior was configurable, it is currently not
> the case (as you found out). I guess the case where it makes sense
> would be in the case where your opposing system is supporting enhanced
> acknowledgements, which HAPI does not really support (the case where
> an acknowledgement is sent to you first as a transport ack, and then
> an application ack). HAPI only supports a single ack to each message.
>
> On 2 August 2017 at 11:09, Tom Chiverton <tc...@ex...
> <mailto:tc...@ex...>> wrote:
>
> I'm receiving this message from another server (I don't know why).
> We're building an interface between our app and a HL7 server, and
> the first step is just getting the HL7 messages off the wire and
> storing them.
>
> The Reciever implementation is making a hard coded policy decision
> that my application that's using it does not want to know about
> some HL7 messages.
>
> This should be configurable, at the very least ?
>
> I've had a rough delve through the code, and it seems because
> Reciever isn't an interface, you have to replace whole chunks of
> other classes as well - I think I ended up with over a half dozen
> cloned classes in my package because thing's were private or
> package and so I couldn't extend them easily.
>
> Maybe it would be easier to have a setting (in HapiContext) about
> what to do with them ?
>
> Tom
>
> On 02/08/17 10:02, Jens Villadsen wrote:
>> Why would you send an unexpected ACK back to the server?
>>
>> On 31 July 2017 at 17:00, Tom Chiverton <tc...@ex...
>> <mailto:tc...@ex...>> wrote:
>>
>> *AH HA*.
>>
>> There's a 3 year old bug with HAPI [1] where it throws away
>> messages if they are unexpected replies.
>>
>> I don't see a way to replace the Receiver instance in use by
>> SimpleServer ?
>>
>> Tom
>>
>> [1]
>> https://sourceforge.net/p/hl7api/feature-requests/88/?limit=25
>> <https://sourceforge.net/p/hl7api/feature-requests/88/?limit=25>
>>
>>
>> On 31/07/17 14:51, Tom Chiverton wrote:
>>>
>>> Hi,
>>>
>>> Sorry I wasn't clear, but further down my
>>> RecivingApplication implementation I do have that :
>>>
>>> public Message processMessage(Message theMessage,
>>> Map<String, Object> theMetadata) throws
>>> ReceivingApplicationException, HL7Exception {
>>> String encodedMessage = new
>>> DefaultHapiContext().getPipeParser().encode(theMessage);
>>> System.out.println("Received message:\n" +
>>> encodedMessage + "\n\n");
>>>
>>> }
>>>
>>> This never outputs.
>>>
>>> Tom
>>>
>>>
>>> On 31/07/17 14:46, Jens Villadsen wrote:
>>>> Take a look at the example found at
>>>> http://hl7api.sourceforge.net/xref/ca/uhn/hl7v2/examples/SendAndReceiveAMessage.html
>>>> <http://hl7api.sourceforge.net/xref/ca/uhn/hl7v2/examples/SendAndReceiveAMessage.html>
>>>> and
>>>> http://hl7api.sourceforge.net/xref/ca/uhn/hl7v2/examples/ExampleReceiverApplication.html
>>>> <http://hl7api.sourceforge.net/xref/ca/uhn/hl7v2/examples/ExampleReceiverApplication.html>
>>>>
>>>>
>>>> What you probably would like to look at is the "processMessage"
>>>>
>>>>
>>>>
>>>>
>>>> On 31 July 2017 at 12:05, Tom Chiverton <tc...@ex...
>>>> <mailto:tc...@ex...>> wrote:
>>>>
>>>> Given
>>>>
>>>>
>>>> public class EvReceiverApplication implements
>>>> ReceivingApplication {
>>>>
>>>> public boolean canProcess(Message theIn) {
>>>> System.out.println("Received message: canProcess true");
>>>> return true;
>>>> }
>>>>
>>>> ....
>>>>
>>>>
>>>> I never see this output when a message is received. So
>>>> it's like the receiver is not registered ?
>>>>
>>>>
>>>> I am doing
>>>>
>>>>
>>>> HL7Service server = context.newServer(port, useTls);
>>>>
>>>> ReceivingApplication handler = new EvReceiverApplication();
>>>>
>>>> server.registerApplication("*", "*", handler);
>>>>
>>>> server.startAndWait();
>>>>
>>>>
>>>> Tom
>>>>
>>>>
>>>> On 31/07/17 10:24, Tom Chiverton wrote:
>>>>>
>>>>> I have used
>>>>> http://hl7api.sourceforge.net/xref/ca/uhn/hl7v2/examples/SendAndReceiveAMessage.html
>>>>> <http://hl7api.sourceforge.net/xref/ca/uhn/hl7v2/examples/SendAndReceiveAMessage.html>
>>>>>
>>>>> to build a simple app that should listen for all
>>>>> messages, and echo them to the console (
>>>>> server.registerApplication("*", "*", handler); ).
>>>>>
>>>>>
>>>>> However, although I get a line from the
>>>>> connectionReceived method, and none from an output I
>>>>> added to the exceptionHandler, I do not get anything
>>>>> from my processMessage() code.
>>>>>
>>>>>
>>>>> Java 1.8 on Ubuntu Server, with the latest HAPI
>>>>> library. I can confirm I am getting a message
>>>>> (admittedly it's MSA is "MSA|AA|245635223|Failure")
>>>>> with a Wireshark packet capture.
>>>>>
>>>>>
>>>>> Any ideas what could be up ?
>>>>>
>>>>> --
>>>>> *Tom Chiverton*
>>>>> Lead Developer
>>>>> e: tc...@ex... <mailto:tc...@ex...>
>>>>> p: 0161 817 2922
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>>>> --
>>>>
>>>> Med venlig hilsen / Kind regards
>>>>
>>>> *Jens Kristian Villadsen*
>>>> cand.polyt
>>>>
>>>> Stålhøjen 24
>>>> 8240 Risskov
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>>
>> --
>>
>> Med venlig hilsen / Kind regards
>>
>> *Jens Kristian Villadsen*
>> cand.polyt
>>
>> Stålhøjen 24
>> 8240 Risskov
>> Denmark
>>
>> Mobile +4523373806 <tel:23%2037%2038%2006>
>> jen...@gm...
>> <mailto:jen...@gm...>
>>
>>
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>
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>
>
>
> --
>
> Med venlig hilsen / Kind regards
>
> *Jens Kristian Villadsen*
> cand.polyt
>
> Stålhøjen 24
> 8240 Risskov
> Denmark
>
> Mobile +4523373806
> jen...@gm... <mailto:jen...@gm...>
>
>
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