New tutorial - Writing a jPOS Gateway

[Alejandro Revilla]

http://jpos.org/blog/2017/05/jpos-tutorial-writing-a-jpos-gateway/

Hope you like it, it's a fresh draft so feedback/typos/error reports are welcome

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@apr

[Luiz Felipph]

Hi Alehandro!

Great tutorial. My 2 cents:

In page 8:

Just change the port number in 50_xml_server.xml. netstat -an | grep LISTEN is your friend.

Maybe you should break this line or add some text before netstat comand:

Just change the port number in 50_xml_server.xml. You can use netstat -an | grep LISTEN to see in use ports

​

Sorry about bad english =).

Cheers!

Felipph

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[Alejandro Revilla]

Good point Luiz, just fixed it. Feel free to reload (http://jpos.org/doc/tutorials/jpos-gateway.pdf).

Thank you!

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[adhi nugroho]

hello apr,

its great to read this. Btw, maybe you can add link for 30_txnmgr.xml file in page 8. I think is good

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adhi

[Alejandro Revilla]

Sure! Just added it. Please reload the PDF (http://jpos.org/doc/tutorials/jpos-gateway.pdf).

Thank you for the feedback!

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[adhi nugroho]

hai apr,

why after i add 30_txnmgr.xml, then i try to telnet and send 0800 xml it doesn't reply 0810 like in page 10?

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adhi

[Alejandro Revilla]

Not sure, why don't you show us your q2.log?

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[adhi nugroho]

sure..sorry...i forgot about that.

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adhi

[Alejandro Revilla]

Looks like you don't have connection with isobridge.jpos.org port 9000, probably a FW issue on your side.

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[Nik]

Hey Alejandro,

The tutorial was great. It cleared many questions I had.

Here is my review on the document.

1) Change "TPS" to "TPS (Transactions Per Second)" on page 1

2) Update the diagram on page 1 to show end to end flow. i.e. put client's sending requests to server and channel doing some work at the other end with JPOS' auto responder

   Updating the diagram to show port numbers (8000 for the server, 9000 for the auto responder, etc.) would also be great

3) Correct spelling "properlyl" to "properly" on page 6

4) Page 10. A short line mentioning why we need a Transaction Manager before the line "We need to add the missing piece, the TransactionManager." What purpose transaction manager serves ?

5) Putting header before Page 3 as PART-1 and before Page 12 as PART-2; as first line on page 1 says "First part will show you how to get it running. Second one will explain you how and why it works"

6) One of the following is correct on page 12:

All incoming messages are handled by the IncomingListener ISORequestListener

All incoming messages are handed to the IncomingListener ISORequestListener

7) Put a one liner mentioning the reason behind configuring a multiplexer. What purpose does a multiplexer serve ?

Kind Regards,

Nik

[adhi nugroho]

thank you very much...i think it cannot ping to...

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adhi

[Mumuney Abdlquadri]

Thanks Alejandro,

I suggest to add a way to make some variables configurable from external file or system properties.

eg. port of QServer, host and port of Channel

Thanks.

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[galih.l...@gmail.com]

great job alejandro,

this is very usefull :)

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[Alejandro Revilla]

Thank you all for the feedback. Nik and Mumuney, I'll try to add your suggestions. Will notify here once done.

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[Alejandro Revilla]

Nik,

I've updated the tutorial (see http://jpos.org/doc/tutorials/jpos-gateway.pdf) with your feedback. Thank you!

I'm sorry I didn't have too much time to expand, but at least the typos, graphs, have been updated. 

Hope this is useful for other users.

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[Allie Harrison]

Excellent paper! This helped clear up several questions I had. 

[Alejandro Revilla]

Thank you! I expect to write many more, stay tuned :)

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