fix #665 add ConnectionSetupPayload.isResumeEnabled and resumeToken

Author: mostroverkhov

rsocket-core/src/main/java/io/rsocket/ConnectionSetupPayload.java

@@ -20,6 +20,7 @@
 import io.netty.util.AbstractReferenceCounted;
 import io.rsocket.frame.FrameHeaderFlyweight;
 import io.rsocket.frame.SetupFrameFlyweight;
+import javax.annotation.Nullable;
 
 /**
  * Exposed to server for determination of ResponderRSocket based on mime types and SETUP
@@ -43,6 +44,11 @@ public static ConnectionSetupPayload create(final ByteBuf setupFrame) {
 
   public abstract boolean willClientHonorLease();
 
+  public abstract boolean isResumeEnabled();
+
+  @Nullable
+  public abstract ByteBuf resumeToken();
+
   @Override
   public ConnectionSetupPayload retain() {
     super.retain();
@@ -101,6 +107,16 @@ public boolean willClientHonorLease() {
       return SetupFrameFlyweight.honorLease(setupFrame);
     }
 
+    @Override
+    public boolean isResumeEnabled() {
+      return SetupFrameFlyweight.resumeEnabled(setupFrame);
+    }
+
+    @Override
+    public ByteBuf resumeToken() {
+      return SetupFrameFlyweight.resumeToken(setupFrame);
+    }
+
     @Override
     public ConnectionSetupPayload touch() {
       setupFrame.touch();