raw-nio

Network applications based on Java raw nio.

• Java 8 11 17

Event Loop

This is my implementation of the event loop, and I built multiple applications on the event loop.

• echo
• TLV protocol(type-lenght-value)
• load balancer
  • random
  • round robin
  • min connection count
• HTTP/1.1 server
  • to-do: chunk and trailer

I also implemented an object pool ByteBufferPool to reuse DirectByteBuffer.

TCP Load Balancer

Example

java -cp build/libs/raw-nio-all.jar \
    com.github.gcnyin.rawnio.loadbalancer.LoadBalancer \
    8080 localhost:8081,localhost:8082 roundRobinPool

8080 is the load balancer port. localhost:8081,localhost:8082 is the backend server list, roundRobinPool is the load balancer strategy, also can be minConnectionCountPool and randomPool.

HTTP/1.1 Server

Example

java -cp build/libs/raw-nio-all.jar \
    com.github.gcnyin.rawnio.http1.HttpServer 8080

8080 is the HTTP/1.1 server port.

Build

Jar

./gradlew clean build

Native image

Install Graalvm.

Install native-image

gu install native-image

Build jar

./gradlew clean build

Build native image

native-image -jar ./build/libs/raw-nio.jar

Jpackage

Need JDK 17.

cd build/libs

jpackage --input . --name raw-nio \
  --main-jar raw-nio.jar \
  --main-class com.github.gcnyin.rawnio.http1.HttpServer \
  --type dmg \
  --java-options '--enable-preview'