make watchDog private

Author: vladak

opengrok-indexer/src/main/java/org/opengrok/indexer/configuration/RuntimeEnvironment.java

@@ -125,7 +125,7 @@ public final class RuntimeEnvironment {
     private transient volatile Boolean ctagsFound;
     private final transient Set<String> ctagsLanguages = new HashSet<>();
 
-    public WatchDogService watchDog;
+    private final WatchDogService watchDog;
 
     private final Set<ConfigurationChangedListener> listeners = new CopyOnWriteArraySet<>();
 
@@ -163,6 +163,13 @@ public void setIndexer(boolean indexer) {
         this.indexer = indexer;
     }
 
+    /**
+     * @return {@code WatchDogService} instance
+     */
+    public WatchDogService getWatchDog() {
+        return watchDog;
+    }
+
     /** Gets the thread pool used for multi-project searches. */
     public ExecutorService getSearchExecutor() {
         return lzSearchExecutor.get();

opengrok-web/src/main/java/org/opengrok/web/WebappListener.java

@@ -101,7 +101,7 @@ public void contextInitialized(final ServletContextEvent servletContextEvent) {
 
         String pluginDirectory = env.getPluginDirectory();
         if (pluginDirectory != null && env.isAuthorizationWatchdog()) {
-            env.watchDog.start(new File(pluginDirectory));
+            env.getWatchDog().start(new File(pluginDirectory));
         }
 
         // Check index(es).
@@ -151,7 +151,7 @@ private void check_index(RuntimeEnvironment env) {
     public void contextDestroyed(final ServletContextEvent servletContextEvent) {
         RuntimeEnvironment env = RuntimeEnvironment.getInstance();
         env.getIndexerParallelizer().bounce();
-        env.watchDog.stop();
+        env.getWatchDog().stop();
         env.stopExpirationTimer();
         try {
             env.shutdownRevisionExecutor();