Programming Guide » History » Revision 5
Revision 4 (chin-yeh, 08/25/2011 11:42 AM) → Revision 5/21 (chin-yeh, 08/25/2011 02:09 PM)
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h1. Programming Guide
There are number of APIs provided by DP. All of these APIs are wrapped and exposed through a client application, [[documentation#list-of-components|dp-client]]. Refer to the following sub sections for more information.
The Javadoc of *dp-client*:
> http://192.168.2.13:50000/dp_client_apidocs/
The binary or source files of *dp-client*:
> [[wiki#SCM|SCM]]
Demo application of *dp-client*:
> http://192.168.2.66:8080/dp-test/index.html
h2. Query DP balance status
Queries the available DP balance.
h3. Input Parameters
See "queryBalance":http://192.168.2.13:50000/dp_client_apidocs/com/ecosway/dp_client/DPServicesUtils.html
h3. Output Parameters
The return object, *TransactionResponse* consists of:
* *process* - Sales1
* *transactionId* - the unique reference that passed in by the caller
* *countryId* - the country ID that passed in by the caller
* *centerId* - possible value is *ONLINE*. It's used to differentiate if the caller are from POS system or online mall.
* *memberId* - the member/shopper ID
* *status* - the status of the transaction. If success, returns *0000*
** refer to document:"DP Web Services" for other possible status
* *balance* - the available DP balance
* *errorCode* - the error code of the transaction. if success, returns *00000*
** refer to document:"DP Web Services" for other possible error code
* *errorMessage* - the detailed description of the error code
** refer to document:"DP Web Services" for other possible description
h3. Code Snippet
<pre>
<code class="JAVA">
TransactionResponse dpResponse;
try {
dpResponse = DPServicesUtils.queryBalance(countryCode, shopperId);
} catch (RemoteException ex) {
// do not ignore. either log the full stack trace or handle it
LOGGER.error(ex);
}
</code>
</pre>
h2. Impose Sales Lock
h3. Input Parameters
h3. Output Parameters
h3. Code Snippet
h2. Release Sales Lock
h3. Input Parameters
h3. Output Parameters
h3. Code Snippet
h2. Commit Sales
h3. Input Parameters
h3. Output Parameters
h3. Code Snippet
h2. Generate the redirect URL for VIP Details page
h3. Input Parameters
h3. Output Parameters
h3. Code Snippet
h2. Exception Handling Strategies
The APIs would throw the following exceptions:
* *RemoteException* - if there's any issue in communicating with the DP
* *SQLException* - if there's any issue in persisting or updating the event
* *unchecked exception* - e.g. NullPointerException. This is more like a programming errors so do not catch it for whatever reasons.
** _note: catch the *Exception* will catch both checked & unchecked exception_
The above exceptions should never be ignored, at least, the full error stack trace should be logged.