News from Habr

Under the Hood of PVS-Studio for Java: How We Develop Diagnostics

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NLazeba @ Habr · 08/05/2020 09:24 EDT

To keep it interesting, this time I'd like to tell about our approach to developing and polishing diagnostic rules for PVS-Studio Java. You will learn how we keep existing warnings consistent across releases and why the new ones aren't too weird. I'll also share a bit of inside information on what plans we, the Java team, have for the future, and show you a few interesting (and a few plain)... Read more ›

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[Translation] Static Analysis: baseline VS diff

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MrDvorak @ Habr · 08/05/2020 09:03 EDT

If you use static analyzers, you will have, sooner or later, to address the task of making their integration into existing projects easier, where fixing all warnings on legacy code is unfeasible. The purpose of this article is not to help with integration but rather to elaborate on the technicalities of the process: the exact implementations of warning suppression mechanisms and pros and cons of each approach.Read more → Read more ›

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Why everybody hates scrum and how to replace it?

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Anna_ZZ @ Habr · 08/05/2020 04:59 EDT

It feels like Scrum has been around forever and everybody knows what it is and has interacted with it in one way or another. Indeed, there were times when everything around scrum was innovative, valuable and efficient: from planning to sprints and so on. However, recently the number of negative reviews has been escalating. Read more → Read more ›

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Why everybody hates scrum and how to replace it?

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Anna_ZZ @ Habr · 08/05/2020 04:59 EDT

It feels like Scrum has been around forever and everybody knows what it is and has interacted with it in one way or another. Indeed, there were times when everything around scrum was innovative, valuable and efficient: from planning to sprints and so on. However, recently the number of negative reviews has been escalating. Read more → Read more ›

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Spring transaction management. Isolation and propagation

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Ildar92 @ Habr · 08/04/2020 02:32 EDT

Introduction In my opinion transaction management is a really important topic for each backend developer. In general, people don’t pay attention to it while using Spring framework. But I think, it is important to know how to use transactions properly. Because sometimes can happen that there was an exception thrown inside your method, but transaction was not rolled back and it is not clear why? Or some other “strange” cases.... Read more ›

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[Translation] Lossless ElasticSearch data migration

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olku @ Habr · 08/03/2020 11:35 EDT

Academic data warehouse design recommends keeping everything in a normalized form, with links between. Then the roll forward of changes in relational math will provide a reliable repository with transaction support. Atomicity, Consistency, Isolation, Durability — that's all. In other words, the storage is explicitly built to safely update the data. But it is not optimal for searching, especially with a broad gesture on the tables and fields. We need... Read more ›

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Boot Ubuntu via http/ftp server with pxe(diskless boot)

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Boozlachu @ Habr · 08/03/2020 05:47 EDT

Intro PXE is a great solution for booting a diskless computer (or a computer without an OS installed). This method is often used for terminal stations and OS mass installation. Stock ubuntu (16.04) in pxe-mode can mount rootfs only from NFS. But this is not a great idea: any difficulties with the network/NFS server and the user gets problems. In my opinion, it's best to use other protocols, such as... Read more ›

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