[NEMO-391] Set GrpcMessageEnvironment as a default implementation (#218)
JIRA: [NEMO-391: Set GrpcMessageEnvironment as a default implementation](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-391)
**Major changes:**
- Change the default implementation of MessageEnvironment to GrpcMessageEnvironment
diff --git a/runtime/common/src/main/java/org/apache/nemo/runtime/common/message/MessageEnvironment.java b/runtime/common/src/main/java/org/apache/nemo/runtime/common/message/MessageEnvironment.java
index 7e4067b..5fc26a2 100644
--- a/runtime/common/src/main/java/org/apache/nemo/runtime/common/message/MessageEnvironment.java
+++ b/runtime/common/src/main/java/org/apache/nemo/runtime/common/message/MessageEnvironment.java
@@ -18,7 +18,7 @@
*/
package org.apache.nemo.runtime.common.message;
-import org.apache.nemo.runtime.common.message.ncs.NcsMessageEnvironment;
+import org.apache.nemo.runtime.common.message.grpc.GrpcMessageEnvironment;
import org.apache.reef.tang.annotations.DefaultImplementation;
import java.util.concurrent.Future;
@@ -27,7 +27,7 @@
* Set up {@link MessageListener}s to handle incoming messages on this node, and connect to remote nodes and return
* {@link MessageSender}s to send message to them.
*/
-@DefaultImplementation(NcsMessageEnvironment.class)
+@DefaultImplementation(GrpcMessageEnvironment.class)
public interface MessageEnvironment {
// The ID of the master used for distinguish the sender or receiver.
