Builder of Aggregator.

server/src/main/java/com/alibaba/otter/canal/server/netty/listener/ChannelFutureAggregator.java

@@ -4,6 +4,7 @@ import com.alibaba.otter.canal.protocol.CanalPacket;
 import org.jboss.netty.channel.ChannelFuture;
 import org.jboss.netty.channel.ChannelFutureListener;
 
+import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
 
 /**
@@ -39,4 +40,64 @@ public class ChannelFutureAggregator implements ChannelFutureListener {
             Throwable t = future.getCause();
         }
     }
+
+    public static class ClientRequestResult {
+
+        private String                 dest;
+
+        private CanalPacket.PacketType type;
+
+        private int                    amount;
+
+        private int                    errorCode;
+
+        private ClientRequestResult() {}
+
+        private ClientRequestResult(Builder builder) {
+            this.dest = builder.dest;
+            this.type = builder.type;
+            this.amount = builder.amount;
+            this.errorCode = builder.errorCode;
+        }
+
+        private static class Builder {
+
+            private String                 dest;
+            private CanalPacket.PacketType type;
+            private int                    amount;
+            private int                    errorCode;
+
+            public Builder dest(String dest) {
+                this.dest = dest;
+                return this;
+            }
+
+            public Builder type(CanalPacket.PacketType type) {
+                this.type = type;
+                return this;
+            }
+
+            public Builder amount(int amount) {
+                this.amount = amount;
+                return this;
+            }
+
+            public Builder errorCode(int errorCode) {
+                this.errorCode = errorCode;
+                return this;
+            }
+
+            public Builder fromPrototype(ClientRequestResult prototype) {
+                dest = prototype.dest;
+                type = prototype.type;
+                amount = prototype.amount;
+                errorCode = prototype.errorCode;
+                return this;
+            }
+
+            public ClientRequestResult build() {
+                return new ClientRequestResult(this);
+            }
+        }
+    }
 }