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authorJon Bratseth <bratseth@yahoo-inc.com>2016-06-15 23:09:44 +0200
committerJon Bratseth <bratseth@yahoo-inc.com>2016-06-15 23:09:44 +0200
commit72231250ed81e10d66bfe70701e64fa5fe50f712 (patch)
tree2728bba1131a6f6e5bdf95afec7d7ff9358dac50 /jdisc_core/src/main/java/com/yahoo/jdisc/client/AbstractClientApplication.java
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+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.jdisc.client;
+
+import com.google.inject.Inject;
+import com.yahoo.jdisc.application.AbstractApplication;
+import com.yahoo.jdisc.application.BundleInstaller;
+import com.yahoo.jdisc.application.ContainerActivator;
+import com.yahoo.jdisc.service.CurrentContainer;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * <p>This is a convenient parent class for {@link ClientApplication} developers. It extends {@link AbstractApplication}
+ * and implements {@link Runnable} to wait for {@link #shutdown()} to be called. When using this class, you implement
+ * {@link #start()} (and optionally {@link #stop()}), and provide a reference to it to whatever component is responsible
+ * for signaling shutdown.</p>
+ *
+ * @author <a href="mailto:simon@yahoo-inc.com">Simon Thoresen</a>
+ */
+public abstract class AbstractClientApplication extends AbstractApplication implements ClientApplication {
+
+ private final CountDownLatch done = new CountDownLatch(1);
+
+ @Inject
+ public AbstractClientApplication(BundleInstaller bundleInstaller, ContainerActivator activator,
+ CurrentContainer container) {
+ super(bundleInstaller, activator, container);
+ }
+
+ @Override
+ public final void run() {
+ try {
+ done.await();
+ } catch (InterruptedException e) {
+ Thread.currentThread().interrupt();
+ }
+ }
+
+ public final void shutdown() {
+ done.countDown();
+ }
+
+ public final boolean isShutdown() {
+ return done.getCount() == 0;
+ }
+
+ public final boolean awaitShutdown(int timeout, TimeUnit unit) throws InterruptedException {
+ return done.await(timeout, unit);
+ }
+
+ public final void awaitShutdown() throws InterruptedException {
+ done.await();
+ }
+}