How to use sagas in Java?

Video tutorial on using sagas to maintain data consistency in a microservice architecture
29 August 2017   2153

The microservice architecture structures an application as a set of loosely coupled, collaborating services. Maintaining data consistency is challenging since each service has its own database to ensure loose coupling. To make matters worse, for a variety of reasons distributed transactions using JTA are not an option for modern applications.

In this talk Chris Richardson describes an alternative transaction model known as a saga. You will learn about the benefits and drawbacks of using sagas. Chris describes how sagas are eventually consistent rather than ACID and what this means for developers. You will learn how to design and implement sagas in a Java application.

Chris Richardson is a developer and architect. He is the author of POJOs in Action, which describes how to build enterprise Java applications with frameworks such as Spring and Hibernate. Chris was also the founder of the original CloudFoundry.com, an early Java PaaS for Amazon EC2. Today, he is a recognized thought leader in microservices.

Android-x86 8.1 Released

Let's see what team has made in the fresh release of Android to x86 port
17 January 2019   173

The team of the Android-x86 project, which is the independent community porting the Android platform for the x86 architecture, have published the first stable release of the assembly based on the Android 8.1 platform, which includes fixes and additions that ensure seamless operation on x86-based platforms. Universal Android-x86 8.1 Live-builds for x86 32-bit and x86_64 architectures suitable for use on typical laptops and tablet PCs are prepared for download. In addition, assemblies in the form of rpm-packages are available for installing the Android environment in Linux distributions.

Let's check new features:

  • Support both 64-bit and 32-bit kernel and userspace with latest LTS kernel 4.19.15.
  • Support OpenGL ES 3.x hardware acceleration for Intel, AMD, Nvidia and QEMU(virgl) by Mesa 18.3.1.
  • Support OpenGL ES 2.0 via SwiftShader for software rendering on unsupported GPU devices.
  • Support hardware accelerated codecs on devices with Intel HD & G45 graphics family.
  • Support secure booting from UEFI and installing to UEFI disk.
  • A text based GUI installer.
  • Add theme support to GRUB-EFI.
  • Support Multi-touch, Audio, Wifi, Bluetooth, Sensors, Camera and Ethernet (DHCP only).
  • Auto-mount external usb drive and sdcard.
  • Add Taskbar as an alternative launcher which puts a start menu and recent apps tray on top of your screen and support freeform window mode.
  • Enable ForceDefaultOrientation on devices without known sensors. Portrait apps can run in a landscape device without rotating the screen.
  • Support arm arch apps via the native bridge mechanism. (Settings -> Android-x86 options)
  • Support to upgrade from non-official releases.
  • Add experimental Vulkan support for newer Intel and AMD GPUs. (Boot via Advanced options -> Vulkan support)
  • Mouse integration support for VMs including VirtualBox, QEMU, VMware and Hyper-V.

Get more infoand download links at official website of the project.