优化本地锁防止多次实例化

flowlong-core/src/main/java/com/aizuda/bpm/engine/scheduling/LocalLock.java

@@ -18,28 +18,18 @@ import java.util.concurrent.locks.ReentrantLock;
  * @since 1.0
  */
 public class LocalLock implements JobLock {
-
     /**
      * 防重入锁
      */
-    private static Lock LOCAL_LOCK;
-
-    public static Lock getLocalLock() {
-        if (null == LOCAL_LOCK) {
-            synchronized (LocalLock.class) {
-                LOCAL_LOCK = new ReentrantLock();
-            }
-        }
-        return LOCAL_LOCK;
-    }
+    private static final Lock LOCAL_LOCK = new ReentrantLock();
 
     @Override
     public boolean tryLock() {
-        return getLocalLock().tryLock();
+        return LOCAL_LOCK.tryLock();
     }
 
     @Override
     public void unlock() {
-        getLocalLock().unlock();
+        LOCAL_LOCK.unlock();
     }
-}
+}