Blog
Dmitriy Drenkalyuk
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Moving Lambda function from Serverless to Terraform
Introduction In this article, I will describe how to move an AWS Lambda function deployed as a Serverless application into a Terraform module. The article may be useful for: The implementation also includes a special case of…
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Thread synchronization in Grails application using Hazelcast
Recently, I have been looking for a way to implement thread synchronization in a Grails application which is hosted on several nodes on Rackspace. And while it’s rather easy to synchronize threads within a single servlet container,…
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Advanced GORM features: inheritance, embedded data, maps and lists storing
In my previous GORM related article, “Association Types in GORM“, I have described how to create different types of relationships using Grails ORM. In this article, I would like to talk about several advanced GORM features that…
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Dynamically add and remove HTML blocks with Grails tag library and JQuery
This post shows how to create Grails tag library for adding and removing identical HTML blocks, which can be usedwhen you want to give user an option to dynamically add extra inputs for additional information. There are…
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Association types in GORM
GORM (Grails Object Relational Mapping) is a plugin integrated with Grails and based on Java ORM – Hibernate. In this article, I’m going to describe how to make different kinds of associations in GORM. One-to-many relationships Let’s…
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Dump a specific table or few rows (MySQL)
The ‘mysqldump’ command is used to dump databases managed by MySQL. Let’s consider three the most useful cases of MySQL database dumping. 2. Sometimes, there’s a need to dump a single table from your database. You can…
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Upgrade ElasticSearch on Linux
Suppose you have a system with ElasticSearch server installed and need to upgrade it to a newer version. Below is a step-by-step guide explaining how you can do it, but note that it only works for ElasticSearch…
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Checkout a specific revision with Git
If you have a project and want to checkout specific revision (commit), you can do it as described below. 1) Clone the project: 2) Use the git describe command to get readable name for your commit.The git…
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Get total records count with GORM criteria
Assume you have a page with pagination that displays some objects table (selected from DB with GORM criteria) in your Grails application. If you want to know total number of possible results (as if there are no…
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