ADFC-00024-oracle.adf.controller.ControllerException:: No ExternalContext could be found.

 ADFC-00024- No ExternalContext could be found.
this is the exception, i have faced while working on my new ADF application and due to this exception application crashed(Internal Server Error-500)
After lot of googling and searching on OTN, i found a solution for this exception- but really don't understand that how it works-
log of ADFC-00024 problem-

 oracle.adf.controller.ControllerException: ADFC-00024: No ExternalContext could be found.  
      at oracle.adfinternal.controller.util.JsfInterfaceImpl.getExternalContext(JsfInterfaceImpl.java:394)  
      at oracle.adfinternal.controller.util.JsfInterfaceImpl.getRequestMap(JsfInterfaceImpl.java:143)  
      at oracle.adfinternal.controller.state.AdfcContext.getCurrentInstance(AdfcContext.java:219)  
      at oracle.adfinternal.controller.ControllerContextImpl.getViewPortByClientId(ControllerContextImpl.java:121)  
      at oracle.adf.controller.internal.binding.DCTaskFlowBinding.getGuardingPermission(DCTaskFlowBinding.java:204)  
      at oracle.adf.model.binding.DCBindingContainer.getGuardingPermission(DCBindingContainer.java:3849)  
      at oracle.adf.model.binding.DCBindingContainer.internalIsViewable(DCBindingContainer.java:3855)  
      at oracle.adf.model.binding.DCBindingContainer.isViewable(DCBindingContainer.java:3826)  
      at oracle.adf.model.binding.DCBindingContainer.resetSuspendedExecutables(DCBindingContainer.java:3490)  
      at oracle.adf.model.binding.DCBindingContainer.resetSuspendedExecutables(DCBindingContainer.java:3492)  
      at oracle.adf.model.binding.DCBindingContainer.internalRefreshControl(DCBindingContainer.java:3365)  
      at oracle.adf.model.binding.DCBindingContainer.refresh(DCBindingContainer.java:2911)  
      at oracle.adf.controller.v2.lifecycle.PageLifecycleImpl.prepareModel(PageLifecycleImpl.java:115)  
      at oracle.adf.controller.v2.lifecycle.Lifecycle$2.execute(Lifecycle.java:149)  
      at oracle.adfinternal.controller.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:197)  
      at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.access$400(ADFPhaseListener.java:23)  
      at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$PhaseInvokerImpl.startPageLifecycle(ADFPhaseListener.java:238)  
      at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$1.after(ADFPhaseListener.java:274)  
      at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.afterPhase(ADFPhaseListener.java:75)  
      at oracle.adfinternal.controller.faces.lifecycle.ADFLifecyclePhaseListener.afterPhase(ADFLifecyclePhaseListener.java:53)  
      at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:439)  
      at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:204)  
      at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)  
      at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)  
      at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)  
      at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)  
      at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)  
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)  
      at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:173)  
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)  
      at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:122)  
      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:468)  
      at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)  
      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:468)  
      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:293)  
      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:199)  
      at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)  
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)  
      at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:180)  
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)  
      at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:111)  
      at java.security.AccessController.doPrivileged(Native Method)  
      at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)  
      at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)  
      at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)  
      at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)  
      at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)  
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)  
      at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:136)  
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)  
      at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)  
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)  
      at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)  
      at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)  
      at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)  
      at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)  
      at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)  
      at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)  
      at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)  
      at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)  
      at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)  

In my case this was due to Application Module configuration, in adf application we have two configuration .

1. AMLocal
2. AMShared

For local configuration ,in Pooling and Scalability there is Maximum Pool Size is 4096 but for shared it is only 1
i am not getting why this is so, then i have set Maximum Pool Size for shared configuration to 4096 and it is working-

Currency Conversion - Google Calculator API integration in ADF using GSON

First ,thanks to this post http://blog.caplin.com/2011/01/06/simple-currency-conversion-using-google-calculator-and-java/ .
I was looking for any API, webservice for retrieving live currency fluctuation, finally i came to this solution that integrates Google Calculator with Java to calculate currenct currency rates and i have integrated this with my Oracle ADF Application

I have created an application using bounded taskflow -

• Created a .jsff page with two input text , to get value of Base and Term currency and a button, on which rate is calculated

 

•  In order to use Goolge Calculator, we have to use GSON (open source java library (API) to convert JSON objects in POJO (pure java object)) 
• To access GSON library we have to add google-gson-stream-2.2.1.jar in our project library - Download Gson Jar
• this trick uses google calculator for calculating converion rate, as we all know Google Calculator is very smart, whenever we search like 1 USD ,it always shows results according to locale

As 1 USD searched in India-

As 1 USD searched in UK- 

• this is also hidden benefit for our application , we can pass locale to get changed values also- now see what is the code that get values from Google Calculator



   public void calculateFluctuationButton(ActionEvent actionEvent) throws Exception {  
     String google = "http://www.google.com/ig/calculator?en=hi&q=";  
     /**Get values from page component binding*/  
     String baseCurrency = baseCurrencyBind.getValue().toString();  
     String termCurrency = termCurrencyBind.getValue().toString();  
     String charset = "UTF-8";  
     /**Replace url using your values-*/  
     URL url = new URL(google + baseCurrency + "%3D%3F" + termCurrency);  
     /**Go to url directly to see you result*/  
     System.out.println(url);  
     Reader reader = new InputStreamReader(url.openStream(), charset);  
     Result result = new Gson().fromJson(reader, Result.class);  
     System.out.println(result);  
     // Get the value without the term currency.  
     String amount = result.getRhs().split("\\s+")[0];  
     System.out.println(amount);  
     resultBind.setValue(amount);  
   }  



• See in code i have passed currency notation from page (INR,USD ) to bean and passed it in url of google calculator and this url returns results

Download Complete Application -Sample ADF Application

Gmail Integration with Oracle ADF using Java Mail API

Gmail is a free secure webmail provided by google, can be accessed by using POP3 or IMAP4 protocol
we have option to integrate Gmail with Java using Java Mail API and I have tried same in Oracle
ADF.
I have developed an application that can send mail (with Attachements) using Gmail in Oracle ADF,
using bounded TaskFlow.

• First , in bounded taskflow ,a login page is created, and a page to send mail is created
• Now you can get values from page and use in bean- So I am not going to write these things
• Integration points starts when you get mail server properties- Managed Bean Code
• You have to use 2 JAR ,inorder to use Java Mail API

  1.mail.jar 2. Activation.jar- Download

Properties emailProperties;

public void setMailServerProperties() {
String emailPort = "587"; //gmail's smtp port
emailProperties = System.getProperties();
emailProperties.put("mail.smtp.port", emailPort);
emailProperties.put("mail.smtp.auth", "true");
emailProperties.put("mail.smtp.starttls.enable", "true");

}

• Now you have to create your message (With or Without attachments)--
   


public void createEmailMessageWidtAtchmnt() throws AddressException, MessagingException {
toWhom = toBind.getValue().toString();
subject = subjectBind.getValue().toString();
messagae = messageBind.getValue().toString();
String[] toEmails = { toWhom };

String emailSubject = subject;
String emailBody = messagae;

mailSession = Session.getDefaultInstance(emailProperties, null);
emailMessage = new MimeMessage(mailSession);

for (int i = 0; i < toEmails.length; i++) {
emailMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(toEmails[i]));
}

emailMessage.setSubject(emailSubject);

//1) create MimeBodyPart object and set your message content
BodyPart messageBodyPart1 = new MimeBodyPart();
messageBodyPart1.setText(emailBody);

emailMessage.setContent(emailBody, "text/html"); //for a html email


}

• here I am getting values from page component binding so don't get confused by this- toBind
  subjectBind, messageBind are component binding of page
  
  
  
  
  
  
• Code snippet to create mail with attachements, you have to do little change in createEmailMessageWidtAtchmnt() to add files in mail . This code browse files from D drive
  
  of system .


//1) create MimeBodyPart object and set your message content
BodyPart messageBodyPart1 = new MimeBodyPart();
messageBodyPart1.setText(emailBody);

//2) create new MimeBodyPart object and set DataHandler object to this object
MimeBodyPart messageBodyPart2 = new MimeBodyPart();

String filename = "D://" + file_name; //change accordingly
System.out.println("Exact path--->" + filename);
DataSource source = new FileDataSource(filename);
messageBodyPart2.setDataHandler(new DataHandler(source));
messageBodyPart2.setFileName(filename);


//5) create Multipart object and add MimeBodyPart objects to this object
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart1);
multipart.addBodyPart(messageBodyPart2);

//6) set the multiplart object to the message object
emailMessage.setContent(multipart);

• To add files in mail in ADF you have to use af:inputFile component, and create a ValueChangeListener on component that get fileName when you browse any file from D drive of your system .
  
  
private String file_name;

public void uploadedFileAttachmentVCE(ValueChangeEvent valueChangeEvent) {
UploadedFile file = (UploadedFile)valueChangeEvent.getNewValue();
file_name = file.getFilename();
}

• From login page you will get login emailId and password, that is set in managed bean code to authenticate user- and send mail


public void sendEmail() {

String emailHost = "smtp.gmail.com";
String fromUser = emailId; //just the id alone without @gmail.com
String fromUserEmailPassword = pwd;
Transport transport = null;
try {
transport = mailSession.getTransport("smtp");
} catch (NoSuchProviderException e) {
System.out.println("No such Provider Exception");
}
try {
transport.connect(emailHost, fromUser, fromUserEmailPassword);
transport.sendMessage(emailMessage, emailMessage.getAllRecipients());
transport.close();
StringBuilder msgEmail = new StringBuilder("Email Sent");
FacesMessage msg = new FacesMessage(msgEmail.toString());
msg.setSeverity(FacesMessage.SEVERITY_INFO);
FacesContext.getCurrentInstance().addMessage("No Network Error !", msg);
System.out.println("Email sent successfully.");
} catch (MessagingException e) {
System.out.println("somthing went wrong-->Messaging Exception");

}

}

Download Complete Application and map these code to bean-Download Sample ADF Application

Creating and Executing ViewCriteria Programmatically

Sometimes you need dynamic ViewCriteria that you can handle at runtime ,
here is the solution ,you can create and apply ViewCriteria Programmatically-



Sample UseCase-

• Suppose you have Department VO
• You want to filter this VO for DepartmentId 10
• Do this using this code snippet


/**Get ViewObject*/
ViewObject vo = getAm().getDepartments1();
/**Create ViewCriteria on ViewObject*/
ViewCriteria vc = vo.createViewCriteria();
/**Create ViewCriteriaRow for that Criteria*/
ViewCriteriaRow vcRow = vc.createViewCriteriaRow();
/**Set the values for ViewCriteriaRow*/
vcRow.setAttribute("DepartmentId", 10);
/**Add row to ViewCriteria*/
vc.addRow(vcRow);
/**Apply Criteria on ViewObject*/
vo.applyViewCriteria(vc);
/**Execute ViewObject*/
vo.executeQuery();

public pcAMImpl getAm() {
pcAMImpl am = (pcAMImpl)resolvElDC("pcAMDataControl");
return am;
}

Invoking Button Action Programmatically,Queuing ActionEvent

Sometimes we need to invoke any button's action in bean without pressing that button,
as you have to call button action on any component's value change Listener- So how to do this in ADF managed bean.
ADF provides facility to queue action one after another, means you can perform multiple action by queuing 

I am using bounded task flow with page fragments(.jsff)-

• Create a button in page fragment and define ActionListener in managed bean
• Now I have created a input text and its valueChangeListener in managed bean
• I wish to call button' ActionListener in my input text valueChangeListener .





• we can do this by writing this code snippet on valueChangeListener 


public void callAceVCE(ValueChangeEvent vce) {
if (vce.getNewValue() != null) {
//Code to call ActionEvent
FacesContext facesContext = FacesContext.getCurrentInstance();
UIViewRoot root = facesContext.getViewRoot();
/**Pass cb1(buttonId) if page is not in taskflow, else if page is inside region then pass rgionid:buttonId*/
RichCommandButton button = (RichCommandButton)root.findComponent("r1:cb1");
ActionEvent actionEvent = new ActionEvent(button);
actionEvent.queue();
}
}

•  Now run your page and when you will change input text value - button actionListener will be called