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Norman Maurer 99face616a Reduce GC produced by native DatagramChannel implementations when in connected mode. (#8806)
Motivation:

In the native code EpollDatagramChannel / KQueueDatagramChannel creates a DatagramSocketAddress object for each received UDP datagram even when in connected mode as it uses the recvfrom(...) / recvmsg(...)  method. Creating these is quite heavy in terms of allocations as internally, char[], String, Inet4Address, InetAddressHolder, InetSocketAddressHolder, InetAddress[], byte[] objects are getting generated when constructing the object. When in connected mode we can just use regular read(...) calls which do not need to allocate all of these.

Modifications:

- When in connected mode use read(...) and NOT recvfrom(..) / readmsg(...) to reduce allocations when possible.
- Adjust tests to ensure read works as expected when in connected mode.

Result:

Less allocations and GC when using native datagram channels in connected mode. Fixes https://github.com/netty/netty/issues/8770.
2019-02-01 10:29:55 +01:00
.github Use GitHub Issue/PR Template Feature 2016-12-07 11:40:26 -08:00
.mvn support publishing snapshots from docker based ci (#8634) 2018-12-07 06:16:39 +01:00
all Remove OIO transport (and transports that depend on it). (#8580) 2018-11-21 15:23:18 +01:00
bom Remove OIO transport (and transports that depend on it). (#8580) 2018-11-21 15:23:18 +01:00
buffer use checkPositive/checkPositiveOrZero (#8803) 2019-01-31 09:06:59 +01:00
codec Remove ChannelHandler.exceptionCaught(...) as it should only exist in… (#8822) 2019-01-31 20:29:17 +01:00
codec-dns Java 8 migration. Remove ThreadLocalProvider and inline java.util.concurrent.ThreadLocalRandom.current() where necessary. (#8762) 2019-01-22 20:14:28 +01:00
codec-haproxy migrate java8 (#8779) 2019-01-28 05:55:30 +01:00
codec-http Old cookies classes removed (#8812) 2019-01-31 20:35:56 +01:00
codec-http2 Remove ChannelHandler.exceptionCaught(...) as it should only exist in… (#8822) 2019-01-31 20:29:17 +01:00
codec-memcache Correcting Maven Dependencies (#8622) 2018-12-06 09:02:00 +01:00
codec-mqtt Java 8 migration: Use diamond operator (#8749) 2019-01-22 16:07:26 +01:00
codec-redis Java 8 migration: Use diamond operator (#8749) 2019-01-22 16:07:26 +01:00
codec-smtp migrate java8 (#8779) 2019-01-28 05:55:30 +01:00
codec-socks migrate java8: use lambda and method reference (#8781) 2019-01-29 14:06:05 +01:00
codec-stomp Remove support for marking reader and writerIndex in ByteBuf to reduce overhead and complexity. (#8636) 2018-12-11 14:00:49 +01:00
codec-xml Update to new checkstyle plugin (#8777) 2019-01-24 16:24:19 +01:00
common Do not schedule notify task if there are no listeners attached to the promise. (#8797) 2019-01-31 08:57:11 +01:00
dev-tools Update version number to start working on Netty 5 2018-11-20 15:49:57 +01:00
docker Update to latest JDK8 and JDK11 releases (#8725) 2019-01-17 09:14:42 +01:00
example Compare HttpMethod by reference (#8815) 2019-01-30 21:17:24 +01:00
handler migrate java8: use lambda and method reference (#8781) 2019-01-29 14:06:05 +01:00
handler-proxy migrate java8: use lambda and method reference (#8781) 2019-01-29 14:06:05 +01:00
license Add the NOTICE of the forked portion of Apache Harmony 2018-01-30 11:22:51 +01:00
microbench Remove ChannelHandler.exceptionCaught(...) as it should only exist in… (#8822) 2019-01-31 20:29:17 +01:00
resolver migrate java8: use lambda and method reference (#8781) 2019-01-29 14:06:05 +01:00
resolver-dns migrate java8: use lambda and method reference (#8781) 2019-01-29 14:06:05 +01:00
tarball Update version number to start working on Netty 5 2018-11-20 15:49:57 +01:00
testsuite Reduce GC produced by native DatagramChannel implementations when in connected mode. (#8806) 2019-02-01 10:29:55 +01:00
testsuite-autobahn Compare HttpMethod by reference (#8815) 2019-01-30 21:17:24 +01:00
testsuite-http2 use checkPositive/checkPositiveOrZero (#8803) 2019-01-31 09:06:59 +01:00
testsuite-osgi Java 8 migration: Use diamond operator (#8749) 2019-01-22 16:07:26 +01:00
testsuite-shading Update version number to start working on Netty 5 2018-11-20 15:49:57 +01:00
transport Remove ChannelHandler.exceptionCaught(...) as it should only exist in… (#8822) 2019-01-31 20:29:17 +01:00
transport-native-epoll Reduce GC produced by native DatagramChannel implementations when in connected mode. (#8806) 2019-02-01 10:29:55 +01:00
transport-native-kqueue Reduce GC produced by native DatagramChannel implementations when in connected mode. (#8806) 2019-02-01 10:29:55 +01:00
transport-native-unix-common use checkPositive/checkPositiveOrZero (#8803) 2019-01-31 09:06:59 +01:00
transport-native-unix-common-tests Correcting Maven Dependencies (#8622) 2018-12-06 09:02:00 +01:00
transport-sctp use checkPositive/checkPositiveOrZero (#8803) 2019-01-31 09:06:59 +01:00
.fbprefs Updated Find Bugs configuration 2009-03-04 10:33:09 +00:00
.gitattributes Include mvn wrapper to make setup of development env easier 2018-01-26 08:13:17 +01:00
.gitignore Exclude mainframer related files from git 2018-10-14 13:20:18 +02:00
CONTRIBUTING.md Move the pull request guide to the developer guide 2014-03-12 13:13:58 +09:00
LICENSE.txt Relicensed to Apache License v2 2009-08-28 07:15:49 +00:00
mvnw Include mvn wrapper to make setup of development env easier 2018-01-26 08:13:17 +01:00
mvnw.cmd Include mvn wrapper to make setup of development env easier 2018-01-26 08:13:17 +01:00
NOTICE.txt Add the NOTICE of the forked portion of Apache Harmony 2018-01-30 11:22:51 +01:00
pom.xml Update to new checkstyle plugin (#8777) 2019-01-24 16:24:19 +01:00
README.md Provide an Automatic-Module-Name for the netty-all artifact fixes #7644 2018-01-27 20:31:16 +01:00
run-example.sh Add UptimeServer and adjust UptimeClient's code style. 2017-04-28 07:41:07 +02:00

Netty Project

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.

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:

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.all
  • io.netty.buffer
  • io.netty.codec
  • io.netty.codec.dns
  • io.netty.codec.haproxy
  • io.netty.codec.http
  • io.netty.codec.http2
  • io.netty.codec.memcache
  • io.netty.codec.mqtt
  • io.netty.codec.redis
  • io.netty.codec.smtp
  • io.netty.codec.socks
  • io.netty.codec.stomp
  • io.netty.codec.xml
  • io.netty.common
  • io.netty.handler
  • io.netty.handler.proxy
  • io.netty.resolver
  • io.netty.resolver.dns
  • io.netty.transport
  • io.netty.transport.epoll (native omitted - reserved keyword in Java)
  • io.netty.transport.kqueue (native omitted - reserved keyword in Java)
  • io.netty.transport.unix.common (native omitted - reserved keyword in Java)
  • io.netty.transport.rxtx
  • io.netty.transport.sctp
  • io.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.