JSP programming best practice: Use the StoreErrorDataBean data bean for error handling

This data bean provides getter methods to:

• Retrieve the store error key, <ECMessageKey>.<Error Code>
• Retrieve the error message parameters, that is, the substitution parameters used in the error messages

In mapping error codes to error messages, the StoreErrorDataBean data bean relies on the existence of the store error message properties file, storeErrorMessages_ locale.properties, in the following directory:

• WC_eardir/Stores.war/WEB-INF/classes/ storedir
• workspace_dir\Stores\Web Content\WEB-INF\classes\ storedir

The store error message properties file should contain error message definitions, such as the following:

# UserRegistrationAddForm.jsp
_ERR_CMD_INVALID_PARAM.2020 = Type an e-mail address in the E-mail
address field.
_ERR_CMD_INVALID_PARAM.2050 = Type your password in the Password
field.

# UserRegistrationUpdateForm.jsp
_ERR_AUTHENTICATION_MINIMUMLENGTH_PASSWORD.2200 = The password you
have entered contains fewer than {0} characters. 
                                                  Ensure that your
password is at least {0} characters in length, 
                                                  including {1}
digit(s) and {2} letter(s), and try again.

The following is an example of the StoreErrorDataBean use:

<wcbase:useBean id="storeError"
classname="com.ibm.commerce.common.beans.StoreErrorDataBean"
scope="page">
  <c:set target="${storeError}" property="resourceBundleName"
value="${sdb.jspStoreDir}/storeErrorMessages" />
</wcbase:useBean>

<c:if test="${!empty storeError.key}">
  <c:set var="errorMessage" value="${storeError.message}" />
</c:if>