delete method now returns boolean value. deleteAsync method added

src/main/java/org/redisson/RedissonCountDownLatch.java

@@ -263,17 +263,17 @@ public Boolean execute(RedisConnection<Object, Object> conn) {
     }
 
     @Override
-    public void delete() {
-        connectionManager.write(getName(), new SyncOperation<Object, Void>() {
+    public boolean delete() {
+        return connectionManager.write(getName(), new SyncOperation<Object, Boolean>() {
             @Override
-            public Void execute(RedisConnection<Object, Object> conn) {
+            public Boolean execute(RedisConnection<Object, Object> conn) {
                 conn.multi();
                 conn.del(getName());
                 conn.publish(getChannelName(), zeroCountMessage);
                 if (conn.exec().size() != 2) {
                     throw new IllegalStateException();
                 }
-                return null;
+                return true;
             }
         });
     }

src/main/java/org/redisson/RedissonLock.java

@@ -490,8 +490,9 @@ public int getHoldCount() {
     }
 
     @Override
-    public void delete() {
+    public boolean delete() {
         forceUnlock();
+        return true;
     }
 
 }

src/main/java/org/redisson/RedissonObject.java

@@ -18,7 +18,8 @@
 import io.netty.util.concurrent.Future;
 import io.netty.util.concurrent.Promise;
 
-import org.redisson.async.ResultOperation;
+import org.redisson.async.AsyncOperation;
+import org.redisson.async.OperationListener;
 import org.redisson.connection.ConnectionManager;
 import org.redisson.core.RObject;
 
@@ -48,17 +49,22 @@ public String getName() {
         return name;
     }
 
-    public void delete() {
-        delete(getName());
+    public boolean delete() {
+        return connectionManager.get(deleteAsync());
     }
 
-    void delete(String name) {
-        connectionManager.write(getName(), new ResultOperation<Long, Object>() {
+    public Future<Boolean> deleteAsync() {
+        return connectionManager.writeAsync(getName(), new AsyncOperation<Object, Boolean>() {
             @Override
-            protected Future<Long> execute(RedisAsyncConnection<Object, Object> async) {
-                return async.del(getName());
+            public void execute(final Promise<Boolean> promise, RedisAsyncConnection<Object, Object> async) {
+                async.del(getName()).addListener(new OperationListener<Object, Boolean, Object>(promise, async, this) {
+                    @Override
+                    public void onOperationComplete(Future<Object> future) throws Exception {
+                        promise.setSuccess(((Number) future.get()).byteValue() == 1);
+                    }
+                });
             }
         });
     }
-
+    
 }

src/main/java/org/redisson/RedissonTopic.java

@@ -92,8 +92,8 @@ public void removeListener(int listenerId) {
     }
 
     @Override
-    public void delete() {
-        // nothing to delete
+    public boolean delete() {
+        throw new UnsupportedOperationException();
     }
 
 }

src/main/java/org/redisson/core/RObject.java

@@ -15,6 +15,8 @@
  */
 package org.redisson.core;
 
+import io.netty.util.concurrent.Future;
+
 /**
  * Base interface for all Redisson objects
  *
@@ -33,6 +35,8 @@ public interface RObject {
     /**
      * Deletes the object
      */
-    void delete();
+    boolean delete();
+
+    Future<Boolean> deleteAsync();
 
 }

src/test/java/org/redisson/RedissonBucketTest.java

@@ -25,8 +25,9 @@ public void testSetDelete() {
         String value = "somevalue";
         bucket.set(value);
         Assert.assertEquals(value, bucket.get());
-        bucket.delete();
+        Assert.assertTrue(bucket.delete());
         Assert.assertNull(bucket.get());
+        Assert.assertFalse(bucket.delete());
     }