HADOOP-6778. add isRunning() method to AbstractDelegationTokenSecretManager (for HDFS-1044)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@947203 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -3,6 +3,9 @@ Hadoop Change Log
 Trunk (unreleased changes)
 
   IMPROVEMENTS
+    HADOOP-6778. add isRunning() method to 
+    AbstractDelegationTokenSecretManager (for HDFS-1044) (boryas)
+
     HADOOP-6633. normalize property names for JT/NN kerberos principal 
     names in configuration (boryas)
 

src/java/org/apache/hadoop/security/token/delegation/AbstractDelegationTokenSecretManager.java

@@ -335,6 +335,14 @@ extends AbstractDelegationTokenIdentifier>
     }
   }
   
+  /**
+   * is secretMgr running
+   * @return true if secret mgr is running
+   */
+  public synchronized boolean isRunning() {
+    return running;
+  }
+  
   private class ExpiredTokenRemover extends Thread {
     private long lastMasterKeyUpdate;
     private long lastTokenCacheCleanup;