Skip to main content

Calling Synchronous WebServices Asynchronously from ADF Managed Bean

Recently I had to implement a SOAP webservice call from a af:commandButton action, but the requirement was to make it an asynchronous call. So that the user doesn't have to wait till the Webservice finish processing the request.

So I built :
  1. Interface which extends java.util.concurrent.Callable.
    • Interface so that I can use the same technique to call multiple Webservices, if required.
  2. A session scoped bean to invoke the above interface.
#1. Interface : WebserviceCallee

public interface WebserviceCallee<T> extends Callable<Boolean> {

    // Base URL of the Webservice to call
    public String getBaseUrl();
    public void setBaseUrl(String baseUrl);

    // To identify this object uniquely    
    public String getUniqueIdentifier();

#2. Implentation :  

public class WebServiceA implements WebserviceCallee<Boolean> {
    private static Log log = LogFactory.getLog(
    private String baseUrl;
    private Thread thread;

    private MyCustomObject myCustomObject;

WebServiceA(MyCustomObject myCustomObject) {
         this.myCustomObject = myCustomObject;
         this.thread = Thread.currentThread();

    public Boolean call() {
        Boolean callResult = Boolean.FALSE;

        return callResult;

    public String getUniqueIdentifier() {
        return "
WebServiceA call for : " + myCustomObject.getUniqueID();

    public void setBaseUrl(String baseUrl) {
        this.baseUrl = baseUrl;

    public String getBaseUrl() {
        return baseUrl;

#3. Session Scoped Bean : ExecutionService

public class ExecutionService {
    private static Log log = LogFactory.getLog(ExecutionService.class);
    private final ExecutorService executorService = Executors.newCachedThreadPool();
    Map<String, Future<Boolean>> submittedTasks = new SubmittedTaskMap<>();
    public ExecutionService() {
    public static ExecutionService getInstance() {
        return (ExecutionService) JsfUtils.getExpressionValue("#{ExecutionService}");
    public void submitCallables(WebserviceCallee<Boolean> webserviceCallee) {
        log.debug("thread spawnned for :" + webserviceCallee.getCalleeIdentity());
        Future<Boolean> future = executorService.submit(webserviceCallee);
        try {
            log.debug("thread result :" + future.get());
        } catch (ExecutionException e) {
        } catch (InterruptedException e) {
        submittedTasks.put(webserviceCallee.getWorkorderNumber(), future);

    public Map<String, Future<Boolean>> getSubmittedTasks() {
        return submittedTasks;
     * Custom HashMap implementation to track the threads spawnned by WebService calls
     * @param <K>
     * @param <V>
    public class SubmittedTaskMap<K,V> extends HashMap<String, Future<Boolean>> {
        public SubmittedTaskMap() {
         * @param key
         * @return NULL if the thread has finished executing
        public Future<Boolean> get(Object key) {
            Future<Boolean> submittedTask = super.get(key);
            if(submittedTask != null) {
                if(submittedTask.isDone()) {
                    return null;
            return submittedTask;

adfc-config.xml :
  <managed-bean id="es1">
    <managed-bean-name id="es2">ExecutionService</managed-bean-name>
    <managed-bean-class id="es3">my.bean.ExecutionService</managed-bean-class>
    <managed-bean-scope id="es4">session</managed-bean-scope>

#4. To invoke from ADF managed bean :

        WebServiceA webServiceA = new WebServiceA(myCustomObject);
        String baseUrl = ContextUtil.getContextProperty(FacesContext.getCurrentInstance(), WSBASEURL);

This technique can also be used as a Singleton implementation. Just make the "ExecutionService" class Singleton. 
Please be aware about the thread usage and implementation, I have used "newCachedThreadPool" of Executors, please consult the documentation of  "java.util.concurrent.Executors" before implementing.


Popular posts from this blog

Chatbots and Oracle Cloud Services

Thanks to Oracle A-Team, I had a chance to work with Chatbots.
3 pure NodeJS applications, on couple of Oracle Cloud platforms and Facebook messenger, and my chatbot was running.

Let me explain, the architecture a bit. To start with, following is the simple representation of how it works.

Exception Handling in ADF

This blog will give you an overview on how you can successfully deal with unhandled Runtime exceptions in an ADF application.

This will give you an idea of:
How to catch the unhandled exceptions.Write a separate log file with stacktrace and thread dumps.Redirect the user to an static error page
#1. Catch unhandled exceptions : 

Create a class "MyExceptionHandler" which extends : Override handleException() method.

public void handleException(FacesContext facesContext, Throwable throwable, PhaseId phaseId) throws Throwable {
        // this method is going to create a separate file with stacktrace and thread dumps
        // redirect to error page

 Create a folder "services" inside : ViewController\src\META-INF and then create a file named "".
In the file, add the absolute name of your custom e…

Bean Based ADF Table with List View in detailStamp facet

One of our projects, we had to display a "tree type" table with different datamodel for children. To solve this, I choose a normal af:table with a detailStamp facet with a List view inside it.
But pretty soon, I ran into an issue of correctly identifying the "disclosed" rows. Since my table's datasource is a bean, not ADF managed datacontrol.

So I solved it using a discloseListener on the af:table.

Full Application is on GitHub :

Classes invloved :

1. : dataProvider class for af:table
2. : dataProvider for the list view inside detailStamp of the table.
3. : provides the methods for populating af:table and af:listView. Also has a discloseListener method to correctly populate the listView datasource.

af:table definition :