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copied!<p>If found a solution, which needs a little trick to work.</p> <p>First of all I have created two new interfaces in my project:</p> <pre class="lang-java prettyprint-override"><code>public interface IDataProvider { public void register(IDataObserver observer); public void unregister(IDataObserver observer); } public interface IDataObserver { public void update(); } </code></pre> <p>As a second step I implemented the two interfaces in my beans.</p> <pre class="lang-java prettyprint-override"><code>@Name(ApplicationBean.BEAN_NAME) @Scope(ScopeType.APPLICATION) public class ApplicationBean implements IDataProvider { private Set<IDataObserver> observerList = new HashSet<IDataObserver>(); @Override public void register(IDataObserver observer) { this.observerList.add(observer); } @Override public void unregister(IDataObserver observer) { this.observerList.remove(observer); } public void notifyAllObserver() { for(IDataObserver observer : observerList) { observer.update(); } } } @Name(SessionBean.BEAN_NAME) @Scope(ScopeType.SESSION) public class SessionBean implements IDataObserver { @Create public void init() { // inject dependencies injectBeans(); // register at the dataserviceprovider to be notified about data changes dataProviderService.register(this); } private void injectBeans() { dataProviderService = (DataProviderService) Component.getInstance( DataProviderService.BEAN_NAME, ScopeType.APPLICATION); } @Destroy public void shutDown() { dataProviderService.unregister(this); } @Override public void update() { // grab data from } } </code></pre> <p>Please be aware that <strong>this approach only works if you inject your seam components via Component.getInstance()</strong> and not via @In. In the later case you will always get null for them as soon as update() gets called!</p>

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