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Polish ParentContextCloserApplicationListener
Fix formatting for the recent ParentContextCloserApplicationListener change, also some minor internal renames.
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@ -25,13 +25,15 @@ import org.springframework.context.event.ContextClosedEvent;
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import org.springframework.core.Ordered;
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/**
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* Listener that closes the application context if its parent is closed. It listens for refresh events and grabs the
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* current context from there, and then listens for closed events and propagates it down the hierarchy.
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* Listener that closes the application context if its parent is closed. It listens for
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* refresh events and grabs the current context from there, and then listens for closed
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* events and propagates it down the hierarchy.
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*
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* @author Dave Syer
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* @author Eric Bottard
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*/
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public class ParentContextCloserApplicationListener implements ApplicationListener<ParentContextAvailableEvent>,
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Ordered {
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public class ParentContextCloserApplicationListener implements
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ApplicationListener<ParentContextAvailableEvent>, Ordered {
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@Override
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public int getOrder() {
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@ -39,38 +41,43 @@ public class ParentContextCloserApplicationListener implements ApplicationListen
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}
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@Override
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public final void onApplicationEvent(ParentContextAvailableEvent event) {
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public void onApplicationEvent(ParentContextAvailableEvent event) {
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maybeInstallListenerInParent(event.getApplicationContext());
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}
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private void maybeInstallListenerInParent(ConfigurableApplicationContext child) {
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if (child.getParent() instanceof ConfigurableApplicationContext) {
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ConfigurableApplicationContext parent = (ConfigurableApplicationContext) child.getParent();
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ConfigurableApplicationContext parent = (ConfigurableApplicationContext) child
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.getParent();
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parent.addApplicationListener(createContextCloserListener(child));
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}
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}
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/**
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* Subclasses may override to create their own subclass of ContextCloserListener. This still enforces the use of a
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* weak reference.
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* Subclasses may override to create their own subclass of ContextCloserListener. This
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* still enforces the use of a weak reference.
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*/
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protected ContextCloserListener createContextCloserListener(ConfigurableApplicationContext child) {
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protected ContextCloserListener createContextCloserListener(
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ConfigurableApplicationContext child) {
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return new ContextCloserListener(child);
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}
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protected static class ContextCloserListener implements ApplicationListener<ContextClosedEvent> {
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protected static class ContextCloserListener implements
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ApplicationListener<ContextClosedEvent> {
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private WeakReference<ConfigurableApplicationContext> contextRef;
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public ContextCloserListener(ConfigurableApplicationContext context) {
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this.contextRef = new WeakReference<ConfigurableApplicationContext>(context);
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private WeakReference<ConfigurableApplicationContext> childContext;
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public ContextCloserListener(ConfigurableApplicationContext childContext) {
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this.childContext = new WeakReference<ConfigurableApplicationContext>(
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childContext);
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}
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@Override
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public void onApplicationEvent(ContextClosedEvent event) {
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ConfigurableApplicationContext context = contextRef.get();
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if (context != null && event.getApplicationContext() == context.getParent() && context.isActive()) {
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ConfigurableApplicationContext context = this.childContext.get();
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if ((context != null)
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&& (event.getApplicationContext() == context.getParent())
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&& context.isActive()) {
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context.close();
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}
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}
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