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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.


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