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Motivation: Recently I'm going to build MQTT broker and client based on Netty. I had MQTT encoder and decoder founded, while no basic examples. So I'm going to share my simple heartBeat MQTT broker and client as an example. Modification: New MQTT heartBeat example under io.netty.example/mqtt/heartBeat/. Result: Client would send CONNECT and PINGREQ(heartBeat message). - CONNECT: once channel active - PINGREQ: once IdleStateEvent triggered, which is 20 seconds in this example Client would discard all messages it received. MQTT broker could handle CONNECT, PINGREQ and DISCONNECT messages. - CONNECT: send CONNACK back - PINGREQ: send PINGRESP back - DISCONNECT: close the channel Broker would close the channel if 2 heartBeat lost, which set to 45 seconds in this example. |
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| .github | ||
| .mvn | ||
| all | ||
| bom | ||
| buffer | ||
| codec | ||
| codec-dns | ||
| codec-haproxy | ||
| codec-http | ||
| codec-http2 | ||
| codec-memcache | ||
| codec-mqtt | ||
| codec-redis | ||
| codec-smtp | ||
| codec-socks | ||
| codec-stomp | ||
| codec-xml | ||
| common | ||
| dev-tools | ||
| docker | ||
| example | ||
| handler | ||
| handler-proxy | ||
| license | ||
| microbench | ||
| resolver | ||
| resolver-dns | ||
| tarball | ||
| testsuite | ||
| testsuite-autobahn | ||
| testsuite-http2 | ||
| testsuite-native-image | ||
| testsuite-osgi | ||
| testsuite-shading | ||
| transport | ||
| transport-native-epoll | ||
| transport-native-kqueue | ||
| transport-native-unix-common | ||
| transport-native-unix-common-tests | ||
| transport-sctp | ||
| .fbprefs | ||
| .gitattributes | ||
| .gitignore | ||
| CONTRIBUTING.md | ||
| LICENSE.txt | ||
| mvnw | ||
| mvnw.cmd | ||
| NOTICE.txt | ||
| pom.xml | ||
| README.md | ||
| run-example.sh | ||
Netty Project
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.
Links
How to build
For the detailed information about building and developing Netty, please visit the developer guide. This page only gives very basic information.
You require the following to build Netty:
- Latest stable Oracle JDK 7
- Latest stable Apache Maven
- If you are on Linux, you need additional development packages installed on your system, because you'll build the native transport.
Note that this is build-time requirement. JDK 5 (for 3.x) or 6 (for 4.0+) is enough to run your Netty-based application.
Branches to look
Development of all versions takes place in each branch whose name is identical to <majorVersion>.<minorVersion>. For example, the development of 3.9 and 4.0 resides in the branch '3.9' and the branch '4.0' respectively.
Usage with JDK 9
Netty can be used in modular JDK9 applications as a collection of automatic modules. The module names follow the reverse-DNS style, and are derived from subproject names rather than root packages due to historical reasons. They are listed below:
io.netty.allio.netty.bufferio.netty.codecio.netty.codec.dnsio.netty.codec.haproxyio.netty.codec.httpio.netty.codec.http2io.netty.codec.memcacheio.netty.codec.mqttio.netty.codec.redisio.netty.codec.smtpio.netty.codec.socksio.netty.codec.stompio.netty.codec.xmlio.netty.commonio.netty.handlerio.netty.handler.proxyio.netty.resolverio.netty.resolver.dnsio.netty.transportio.netty.transport.epoll(nativeomitted - reserved keyword in Java)io.netty.transport.kqueue(nativeomitted - reserved keyword in Java)io.netty.transport.unix.common(nativeomitted - reserved keyword in Java)io.netty.transport.rxtxio.netty.transport.sctpio.netty.transport.udt
Automatic modules do not provide any means to declare dependencies, so you need to list each used module separately
in your module-info file.