Taiwan Services » DP Client

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h1. Programming Guide for Batch Program

> Refer to [[Programming Guide]] if integrating in other environment, e.g. web app

All of the APIs mentioned below will not invoke the DP web services at all. Instead it will insert record into [[Specification#DP_INTERFACE|interface table]] and then those records will be picked up by a specific batch program and send it to DP on daily basis.

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*:

> There is no demo application for these APIs but these API usage is very similiar with the one that mentioned in [[Programming Guide]]

h2. Commit Sales

This method is used to deduct DP balance. 

_This method *will only persist* the transaction details into database._

_Method Signature:_

<pre>

<code class="JAVA">

public static int persistSalesCommit(java.sql.Connection dbConnection,

                                     java.lang.String transactionId,

                                     java.lang.String countryCode,

                                     java.lang.String memberId,

                                     java.util.Date trxDate,

                                     java.math.BigDecimal dpAmount,

                                     java.math.BigDecimal invoiceAmount)

                              throws java.sql.SQLException

</code>

</pre>

h3. Input Parameters

See "persistSalesCommit":http://192.168.2.13:50000/dp_client_apidocs/com/ecosway/dp_client/DPServicesUtils.html

h3. Output Parameters

The number of affected rows

h3. Code Snippets

<pre>

<code class="JAVA">

Connection dbConnection = DBConnectionFactory.createDbConnection("java:/DB2DS2");

TransactionResponse dpResponse = new TransactionResponse();

try {

	dpResponse = DPServicesUtils.persistSalesCommit(dbConnection,

				trxId, countryCode, shopperId,

				trxDate, dpAmount, invoiceAmount);

} catch (SQLException ex) {

	LOGGER.error("Error in persisting the event", ex);

} finally {		

	if (dbConnection != null) {

	   dbConnection.close();

	}

}

</code>

</pre>

h2. Sales Return / Cancel Sales

This method is used to adjust the DP balance.

_This method *will only persist* the transaction details into database._

_Method Signature:_

<pre>

<code class="JAVA">

public static int persistSalesReturn(java.sql.Connection connection,

                                     java.lang.String transactionId,

                                     java.lang.String countryCode,

                                     java.lang.String memberId,

                                     java.util.Date trxDate,

                                     java.math.BigDecimal dpAmount,

                                     java.math.BigDecimal invoiceAmount)

                              throws java.sql.SQLException

</code>

</pre>

h3. Input Parameters

See "persistSalesReturn":http://192.168.2.13:50000/dp_client_apidocs/com/ecosway/dp_client/DPServicesUtils.html

h3. Output Parameters

The number of affected rows

h3. Code Snippets

<pre>

<code class="JAVA">

Connection dbConnection = DBConnectionFactory.createDbConnection("java:/DB2DS2");

TransactionResponse dpResponse = new TransactionResponse();

try {

	dpResponse = DPServicesUtils.persistSalesReturn(dbConnection, trxId, countryCode, 

			shopperId,trxDate, dpAmount, invoiceAmount);	

} catch (SQLException ex) {

	LOGGER.error("Error in persisting the event", ex);

} finally {

	if (dbConnection != null) {

		dbConnection.close();

	}

}

</code>

</pre>

h2. VIP Upgrade to BO

This method upgrades the VIP to BO. One must utilize all of the remaining DP balance in the limited period of time. The validity period is determined by DP.

_This method *will only persist* the transaction details into database._

_Method Signature:_

<pre>

<code class="JAVA">

public static int persistVipUpgrade(java.sql.Connection connection,

                                    java.lang.String trxId,

                                    java.lang.String countryCode,

                                    java.lang.String memberName,

                                    java.lang.String memberId,

                                    java.lang.String newMemberId,

                                    java.util.Date trxDate)

                             throws java.sql.SQLException

</code>

</pre>

h3. Input Parameters

See "persistVipUpgrade":http://192.168.2.13:50000/dp_client_apidocs/com/ecosway/dp_client/DPServicesUtils.html

h3. Output Parameters

The number of affected rows

h3. Code Snippets

<pre>

<code class="JAVA">

Connection dbConnection = DBConnectionFactory.createDbConnection("java:/DB2DS2");

TransactionResponse dpResponse = new TransactionResponse();

try {

	dpResponse = DPServicesUtils.persistVipUpgrade(dbConnection, trxId, countryCode,

			memberName, shopperId, newShopperId, trxDate);

} catch (SQLException ex) {

	LOGGER.error("Error in persisting the event", ex);

} finally {

	if (dbConnection != null) {

		dbConnection.close();

	}

}

</code>

</pre>

h2. Exception Handling Strategies

The APIs would throw the following exceptions:

* *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.