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implemented optional injection of ServletContextListeners

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This commit is contained in:
Sebastian Sdorra
2019-06-21 09:50:03 +02:00
parent de5bee4947
commit 6c064a005a
2 changed files with 113 additions and 40 deletions
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62
scm-webapp/src/main/java/sonia/scm/ServletContextListenerHolder.java
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@@ -39,6 +39,7 @@ import com.google.inject.Singleton;
//~--- JDK imports ------------------------------------------------------------
import java.util.Collections;
import java.util.Set;
import javax.servlet.ServletContextEvent;
@@ -49,55 +50,36 @@ import javax.servlet.ServletContextListener;
* @author Sebastian Sdorra
*/
@Singleton
public class ServletContextListenerHolder implements ServletContextListener
{
public class ServletContextListenerHolder implements ServletContextListener {
static class ListenerHolder {
@Inject(optional = true)
private Set<ServletContextListener> listenerSet;
private Set<ServletContextListener> getListenerSet() {
if (listenerSet == null) {
return Collections.emptySet();
}
return listenerSet;
}
}
private final Set<ServletContextListener> listenerSet;
/**
* Constructs ...
*
*
* @param listenerSet
*/
@Inject
public ServletContextListenerHolder(Set<ServletContextListener> listenerSet)
public ServletContextListenerHolder(ListenerHolder listeners)
{
this.listenerSet = listenerSet;
this.listenerSet = listeners.getListenerSet();
}
//~--- methods --------------------------------------------------------------
/**
* Method description
*
*
* @param sce
*/
@Override
public void contextDestroyed(ServletContextEvent sce)
{
for (ServletContextListener listener : listenerSet)
{
listener.contextDestroyed(sce);
}
public void contextInitialized(ServletContextEvent sce) {
listenerSet.forEach(listener -> listener.contextInitialized(sce));
}
/**
* Method description
*
*
* @param sce
*/
@Override
public void contextInitialized(ServletContextEvent sce)
{
for (ServletContextListener listener : listenerSet)
{
listener.contextInitialized(sce);
}
public void contextDestroyed(ServletContextEvent sce) {
listenerSet.forEach(listener -> listener.contextDestroyed(sce));
}
//~--- fields ---------------------------------------------------------------
/** Field description */
private Set<ServletContextListener> listenerSet;
}