Netty 4.0.51 and 4.1.15. final versions released

New updates for a NIO client server framework available now
29 August 2017   870

New bugfix releases for Netty 4.0.x and 4.1.x series available now. 

What is Netty? 

Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

'Quick and easy' doesn't mean that a resulting application will suffer from a maintainability or a performance issue. Netty has been designed carefully with the experiences earned from the implementation of a lot of protocols such as FTP, SMTP, HTTP, and various binary and text-based legacy protocols. As a result, Netty has succeeded to find a way to achieve ease of development, performance, stability, and flexibility without a compromise.

Netty architecture
Netty architecture

Main features:

  • Design
    • Unified API for various transport types - blocking and non-blocking socket
    • Based on a flexible and extensible event model which allows clear separation of concerns
    • Highly customizable thread model - single thread, one or more thread pools such as SEDA
    • True connectionless datagram socket support (since 3.1)
  • Ease of use
    • Well-documented Javadoc, user guide and examples
    • No additional dependencies, JDK 5 (Netty 3.x) or 6 (Netty 4.x) is enough
  • Performance
    • Better throughput, lower latency
    • Less resource consumption
    • Minimized unnecessary memory copy
  • Security
    • Complete SSL/TLS and StartTLS support

What's new in updates?

These releases contains bug-fixes, performance enhancements and features.

The most important changes for 4.0.51.Final and 4.1.15.Final are:

  • Support JDK9-native ALPN 
  • More bullet-proof way of detecting if ipv6 is supported or not when using the native transport 
  • DelegatingSslContext should also be able to configure the SslHandler 
  • Netty 4.1.14.Final fails to load on android
  • Include JNIEXPORT on exported symbols 
  • Unify KQueue and Epoll wait timeout approach 
  • Make NativeLibraryLoader check java.library.path first 
  • Use the ByteBufAllocator when copy a ReadOnlyByteBufferBuf and so also be able to release it without the GC when the Cleaner is present 
  • Ensure netty builds with java9 (build 9+181) 
  • Make configurable the initial and max size of InternalThreadLocal.stringBuilder 
  • Fix endless loop in ByteBufUtil#writeAscii 
  • Correctly support SO_TIMEOUT for OioDatagramChannel 
  • Ensure we null out the previous set InetAddress on java.net.DatagramPacket 
  • Correctly handle connect/disconnect in EpollDatagramChannel
  • Shutting down the outbound side of the channel should not accept future writes

The most important changes for 4.1.15.Final only are:

  • Decouple DnsCache and DnsCacheEntry 
  • KQueue detect peer close without EVFILT_READ
  • Support the little endian floats and doubles by ByteBuf 
  • We should prefer heap buffers when using the OIO transport to reduce memory copies 
  • First call channelReadComplete(...) before flush(...) for better performance 
  • HTTP/2 Child Channel and FrameCodec Feature Parity  

 Learn more at official website.

What's new in IntelliJ IDEA 2018.2?

New version of popular IDE improved Spring and Spring Boot support
18 July 2018   104

The new version of IDE IntelliJ IDEA from JetBrains under the number 2018.2 has introduced several functions for developers using Spring and Spring Boot frameworks. Among the innovations: support for Spring Integration, runtime diagrams, library bin management and many minor fixes and improvements.

New features of IntelliJ IDEA

Now you can visualize the components in the system using the new Spring Integration diagram. All versions above 5.0 are supported.

Spring Integratio Diagram
Spring Integration Diagram

It shows all the gateways, channels and bridges of the application, regardless of whether they are configured using Java or XML annotations.

The IDE also received code completion and navigation for such integration annotations as @BridgeTo/From and @EnablePublisher:

Integration Annotations
Integration Annotations

In the new version of IntelliJ IDEA, you can view the dependencies during the execution of the Spring Boot application as a diagram through the control panel. To do this, go to the "Endpoints" section and enable the "Diagram Mode" function:

Runtime Dependencies
Runtime Dependencies

If there are too many beans in the project, the non-user codes can be disabled using the new "Show / Hide Library Beans" switch:

Show / Hide library beans
Show / Hide library beans

In addition, in 2018.2, you can start, modify, and test the display of HTTP requests in the "Endpoints" tab:

HTTP request
HTTP request

A complete list of improvements and changes is available in the technical update document. According to the developers, a lot of work has been done to improve performance in large projects.