1 files changed, 25 insertions, 0 deletions
diff --git a/java/com/google/gerrit/lifecycle/LifecycleModule.java b/java/com/google/gerrit/lifecycle/LifecycleModule.java
new file mode 100644
index 0000000000..bfb61d2eda
--- /dev/null
+++ b/java/com/google/gerrit/lifecycle/LifecycleModule.java
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+package com.google.gerrit.lifecycle;
+
+import com.google.gerrit.extensions.config.FactoryModule;
+import com.google.gerrit.extensions.events.LifecycleListener;
+import com.google.inject.Singleton;
+import com.google.inject.binder.LinkedBindingBuilder;
+import com.google.inject.internal.UniqueAnnotations;
+import java.lang.annotation.Annotation;
+
+/** Module to support registering a unique LifecyleListener. */
+public abstract class LifecycleModule extends FactoryModule {
+  /**
+   * @return a unique listener binding.
+   *     <p>To create a listener binding use:
+   *     <pre>
+   * listener().to(MyListener.class);
+   * </pre>
+   *     where {@code MyListener} is a {@link Singleton} implementing the {@link LifecycleListener}
+   *     interface.
+   */
+  protected LinkedBindingBuilder<LifecycleListener> listener() {
+    final Annotation id = UniqueAnnotations.create();
+    return bind(LifecycleListener.class).annotatedWith(id);
+  }
+}