+ <dependency>
+ <groupId>com.google.protobuf</groupId>
+ <artifactId>protobuf-java</artifactId>
+ <version>3.6.1</version>
+ </dependency>
+ <dependency>
+ <groupId>io.netty</groupId>
+ <artifactId>netty-transport</artifactId>
+ <version>4.1.34.Final</version>
+ </dependency>
+ <dependency>
+ <groupId>io.netty</groupId>
+ <artifactId>netty-all</artifactId>
+ <version>4.1.34.Final</version>
+ <!-- <version>${netty.version}</version> -->
+ </dependency>
+ <dependency>
+ <groupId>junit</groupId>
+ <artifactId>junit</artifactId>
+ <version>4.12</version>
+ <scope>test</scope>
+ </dependency>