Create custom packagers!

[Chung vu]

Hi all ,
I am reading our POS specification from my vendor.
I create custom packager for that based on specification .
My quesiton is
Would i create both of two file
1) /src/main/org/jpos/jso/packager/ newspec.java
2) /src/config/packager/ newspec.xml

Based on Andy Orrock blog , he taught creating xml file only ,

Would any body advise me ?  
Thanks

[chhil]

You define a packager for if and only if you the existing ones don't
match or tweaked to match.

There are 2 ways of defining a packager
1. xml file.
2. java file.

Preferable approach is to use the xml file. This xml file should be
passed into the generic packager and then used.

The other approach is to use the java file where you instantiate your
java object in your code.

If you take a look at the source you will see that there would be a
java file and and xml file for existing packagers.

Highly recommend you buy the programmers guide to make your life easier.

-chhil

[Chung vu]

Hi chihil,
Thanks so much !
I understand now and choose the xml file that i created before email group for asking.
I bought the jpos guide one year ago due to my limitation of java so i start until now.

You said that :

"his xml file should be
passed into the generic packager and then used."

I try to see the code but which place to pass into generic packager.
I have this question because i don't know call it from jpos.

I read the manual , this example code is :

import org.jpos.iso.ISOPackager;
import org.jpos.iso.packager.ISO87BPackager;

from my understand that it it used java file .
Would you give me a code for using xml file ?

I am not good in java but try to code it .
Thanks!

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[Mark Salter]

Chung vu wrote:

> I try to see the code but which place to pass into generic packager.
> I have this question because i don't know call it from jpos.
>
> I read the manual , this example code is :

It is probably worth you getting the latest release of this document?

>
> import org.jpos.iso.ISOPackager;
> import org.jpos.iso.packager.ISO87BPackager;
>
> from my understand that it it used java file .
> Would you give me a code for using xml file ?

The jpos-ee components will allow you to specify the configuration file
directly:-

Section 13.1.9 :-

<mux name="mux" logger="qsp" realm="mux" connect="yes">
<property name="tracenofield" value="11" />
<channel name="channel"
class="org.jpos.iso.channel.CSChannel"
packager="org.jpos.iso.packager.GenericPackager"
packager-config="cfg/newspec.xml"
logger="qsp" realm="channel">
<property name="host" value="192.168.0.1" />
<property name="port" value="8000" />
</channel>
<request-listener
class="org.jpos.apps.qsp.RequestDispatcher"
logger="qsp" realm="dispatcher">
<property name="prefix" value="my.company.jpos.Handler_" />
<property name="timeout" value="60000" />
</request-listener>
</mux>

But to use it from code (Example 3.4 in the current version of the guide:-

Example 3.4.

import org.jpos.iso.ISOPackager;
import org.jpos.iso.packager.GenericPackager;
import org.jpos.iso.packager.ISO87BPackager;
.
.
.
ISOPackager p = new GenericPackager ("newspec.xml");

>
> I am not good in java but try to code it .

Perhaps jpos-ee is a better option for you. It will depend on what you
are trying to implement, but with jpos-ee you can certainly write less code.

--
Mark

[Chung vu]

Thanks Mark so much !
You recommend me to use jpos-ee .
Our implementation is that
I code a client send to POS channel ( we use OPENWAY solution from Russion) :
+ balance inquiry
............
or
make a gateway that receive iso 8583 and use my oracle function to return value through this gateway.

Is it okie to use jpos-ee ?
Regards,
Chung

[Mark Salter]

Chung vu wrote:
> Thanks Mark so much !
> You recommend me to use jpos-ee .

This was to minimise the amount of java code you might need to write
because you indicated that you were not too familiar with java. Instead
of code, you would setup the jpos components via xml configuration
files, and write java code just for the application level message
building or handling.

> Our implementation is that
> I code a client send to POS channel ( we use OPENWAY solution from Russion)
> :
> + balance inquiry
> ............
> or
> make a gateway that receive iso 8583 and use my oracle function to return
> value through this gateway.
>
> Is it okie to use jpos-ee ?

I would think so, but I can't really offer guidance against the
description given, sorry.

--
Mark

[vu dinh chung]

Hi Mark ,
If you use code like Example 3.4 means that you also need create java.file  ( ISO87BPackager.java)
import org.jpos.iso.packager.ISO87BPackager
so you must create 2 file : xml and java file
Would you help me to explain ? It makes me confused
Thanks
Chung

[Mark Salter]

vu dinh chung wrote:
> Hi Mark ,
> If you use code like Example 3.4 means that you also need create
> java.file ( ISO87BPackager.java)
> import org.jpos.iso.packager.ISO87BPackager
> so you must create 2 file : xml and java file

I'm sorry, yes the example is confusing, we should fix that.

> Would you help me to explain ? It makes me confused

Define your newspec.xml file,
create a ISOPackager via :-

ISOPackager newspecpackager = new GenericPackager ("newspec.xml");

and then use this ISOPackager where needed...

ISOChannel channel = new YourChannel("localhost", 8000, newspecpackager);

or

ISOMsg m = new ISOMsg();
m.setPackager(newspecpackager);

--
Mark

[Digambar Chavan]

As you guided, there is a way to define generic packager using java, my question is, is it possible 

to achieve the role of generic packager by using 100% java code.

example,

GenericPackager packager = new GenericPackager("src/main/resources/basic.xml");

GenericPackager packager = new GenericPackager(javaObject reference);

can we do any such things? If possible please help me out with an example.

[chhil]

Please start a new thread when you have a question, do not add to an old thread.

You can use existing java packager or define your own ones. The drawback of java is if field definitions get added pr changed you need to need new builds. With the xml files you can just change the xml without worrying about java code.  

List of packagers provided by jpos...

https://github.com/jpos/jPOS/tree/master/jpos/src/main/java/org/jpos/iso/packager  

Both GenericPackager (takes an xml file as input) and java based packagers both extend ISOBasePackager so that means they can be used interchangeably.

https://github.com/jpos/jPOS/blob/master/jpos/src/main/java/org/jpos/iso/packager/GenericPackager.java

-chhil  

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[Victor Salaman]

Use the xml file. Use it as a resource (move it src/main/resources/*) so it becomes part of your jar. Then reference it as "jar:packager/mypackager.xml".

--

[Andrés Alcarraz]

Hi Digambar the xml approach is easier, but if you prefer to create the packager pure java, you have to extend ISOBasePackager, hte whloe role of generic packager is to load an xml packager definition file.

You can see chapter 4 of jpos programmer's guide to see some examples better yet a good explanation, a whole read to that doc is recommendable for every jpos developer at least once.

Hope this point you in the right direction.

Andrés

--

[Andrés Alcarraz]

Hi Digambar the xml approach is easier, but if you prefer to create the packager pure java, you have to extend ISOBasePackager, hte whloe role of generic packager is to load an xml packager definition file.

You can see chapter 4 of jpos programmer's guide to see some examples better yet a good explanation, a whole read to that doc is recommendable for every jpos developer at least once.

Hope this point you in the right direction.

Andrés Alcarraz

---

Transactility, Inc. | skype: alcarraz1976 | @andresalcarraz

On 23/5/19 00:22, Digambar Chavan wrote:

--

[Digambar Chavan]

Thanks for your support & clarification,actually I am new to this JPOS world.

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