How to Handle POST Callbacks from a third party appliation

[nynymike]

Jbilling uses HTTP POST to send information about billing events to the application (i.e. the subscription renewal payment was declined, and the account should be de-activated). I could setup a Servlet to process this POST, but it would be nice if I could route it through SEAM. If it were a GET, I'd know how to deal with it. But what do you do with a POST, because there is no conversation id.

thx,

Mike

[fhh]

Use page parameters and a page action.

Regards

Felix

[nynymike]

I am getting a NPE... I must be doing something wrong! But what...

pages.xml

 <page view-id="/jbillingCallbackHandler.xhtml"
 action="#{jBillingCallbackHandlerAction.processPost}">
 <param name="cmd" value="#{jbillingCallback.cmd}"/>
 <param name="user_id" value="#{jbillingCallback.user_id}"/>
 <param name="login_name" value="#{jbillingCallback.login_name}"/>
 <param name="from_status" value="#{jbillingCallback.from_status}"/>
 <param name="to_status" value="#{jbillingCallback.to_status}"/>
 </page>

Error

 ... 51 more
Caused by: java.lang.NullPointerException
 at us.ziacom.vm.action.JbillingCallbackHandlerAction.processPost(Jbillin
gCallbackHandlerAction.java:21)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:112)
 at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationCo
ntextImpl.java:166)
 at org.jboss.seam.intercept.EJBInvocationContext.proceed(EJBInvocationCo
ntext.java:44)
 at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocation
Context.java:56)
 at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackI
nterceptor.java:31)
 at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocation
Context.java:68)
 at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterc
eptor.java:46)
 at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocation
Context.java:68)
 at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodConte
xtInterceptor.java:42)
 at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocation
Context.java:68)
 at org.jboss.seam.persistence.EntityManagerProxyInterceptor.aroundInvoke
(EntityManagerProxyInterceptor.java:26)
 at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocation
Context.java:68)
 at org.jboss.seam.persistence.HibernateSessionProxyInterceptor.aroundInv
oke(HibernateSessionProxyInterceptor.java:27)
 at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocation
Context.java:68)
 at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:
106)
 at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionB
eanInterceptor.java:50)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationCo
ntextImpl.java:118)
 at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3Int
erceptorsInterceptor.java:63)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:101)
 at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invok
e(TransactionScopedEntityManagerInterceptor.java:54)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:101)
 at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsI
nterceptor.java:47)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:101)
 at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
 ... 84 more

Action

@Stateless
@Scope(ScopeType.STATELESS)
@Name("jBillingCallbackHandlerAction")
public class JbillingCallbackHandlerAction implements
 IJbillingCallbackHandlerAction {

 @In(required=false)
 JbillingCallback callback;

 @Override
 public String processPost() {
 System.out.println("**********" + callback.getCmd());
 System.out.println("**********" + callback.getUser_id());
 System.out.println("**********" + callback.getLogin_name());
 System.out.println("**********" + callback.getFrom_status());
 System.out.println("**********" + callback.getTo_status());
 return "home";
 }

HTML Test Page that Posts Request

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
 <title>MyHtml.html</title>

 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
 <meta http-equiv="description" content="this is my page">
 <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">

 <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->

 </head>

 <body>
 This is my HTML page.
 <br>
 <form method="post" action="http://jboss.ziacom.us:8080/voicemail/jbillingCallbackHandler.seam" name="jbillingTest">
 <input type="hidden" value="foo" name="cmd">
 <input type="hidden" value="bar" name="user_id">
 <input type="hidden" value="spam" name="login_name">
 <input type="hidden" value="eggs" name="from_status">
 <select size="4" name="to_status">
 <option selected value="spam">foo</option>
 <option value="eggs">bar</option>
 </select>
 <BR />
 <input type="submit" value="Submit" name="submit">
 </form>
 </body>
</html>

Model

import org.jboss.seam.annotations.Name;

@Name("jbillingCallback")
public class JbillingCallback {
 private String cmd;
 private String user_id;
 private String login_name;
 private String from_status;
 private String to_status;

 /**
 * A string that identifies jbilling's call. It is always set to ?ageing_update? by
 * jbilling,and allows you to uniquely identify a jbilling call (in case the callback's
 * url is used for other purposes).
 */
 public String getCmd() {
 return cmd;
 }
 public void setCmd(String cmd) {
 this.cmd = cmd;
 }

 /**
 * The User ID of the user that is undergoing a status change in jbilling. You can
 * use this ID to identify the user directly, or otherwise query jbilling via the API to
 * obtain the data for the user, should you need further information.
 */
 public String getUser_id() {
 return user_id;
 }
 public void setUser_id(String user_id) {
 this.user_id = user_id;
 }

 /**
 * The user name of the user that is undergoing a status change.
 */
 public String getLogin_name() {
 return login_name;
 }
 public void setLogin_name(String login_name) {
 this.login_name = login_name;
 }

 /**
 * The status the user is transitioning from. This is the status the user had
 * before the transition took place.
 */
 public String getFrom_status() {
 return from_status;
 }
 public void setFrom_status(String from_status) {
 this.from_status = from_status;
 }

 /**
 * The status the user is transitioning to. This is the status the user has once
 * the transition took place. Subsequent calls to getUser() in the API will return this
 * status code.
 */
 public String getTo_status() {
 return to_status;
 }
 public void setTo_status(String to_status) {
 this.to_status = to_status;
 }
}

[fhh]

Start JBoss in debug mode and set a beakpoint in us.ziacom.vm.action.JbillingCallbackHandlerAction.processPost().

Regards

Felix

[nynymike]

Actually, the solution was quite simple:

pages.xml

 <page view-id="/jbillingCallbackHandler.xhtml"
 action="#{jBillingCallbackHandlerAction.processPost}">
 </page>

Action

@Stateless
@Scope(ScopeType.STATELESS)
@Name("jBillingCallbackHandlerAction")
public class JbillingCallbackHandlerAction implements
 IJbillingCallbackHandlerAction {

// @In(required=false)
// JbillingCallbackEntity callback;

 @RequestParameter("cmd")
 private String cmd;

 @RequestParameter("user_id")
 private String user_id;

 @RequestParameter("login_name")
 private String login_name;

 @RequestParameter("from_status")
 private String from_status;

 @RequestParameter("to_status")
 private String to_status;

 @Override
 public String processPost() {
 System.out.println("**********" + cmd);
 System.out.println("**********" + user_id);
 System.out.println("**********" + login_name);
 System.out.println("**********" + from_status);
 System.out.println("**********" + to_status);
 return "home";
 }

}