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In most of our applications we are using spring security core plugin for the authentication process. We define some roles in that . Have your ever thought about assigning precedence to the roles. Like, You are having 3 roles defined in your application. i.e. ROLE_SUPER_ADMIN, ROLE_ADMIN ,ROLE_ATTENDEE. While using these roles i.e [java] @Secured([‘ROLE_ATTENDEE’]) def […]
Grails console is one plugin that we install as soon as we create a new application. The power and the purpose of the utility is too good to be missed. On one such occasion, I decided to dig the code in the plugin and discovered the magic trick that executes the string that we type […]
Currently in my Grails project I am using PostgreSQL database so I thought to share my knowledge with everyone. I am using it on Linux operating system. I am mentioning all the steps that I followed to integrate PostgreSQL with Grails . Step 1: Install PostgreSQL on your system To install postgreSql [java] sudo apt-get […]
To avoid getting log messages in single log file we can create a new log file every day in just one step. This can be done very easily by using DailyRollingFileAppender instead of RollingFileAppender . We just need to add a new Log4J appenders to our configuration file (Config.groovy). In the following example we create […]
Recently in my project, we needed to import database dumps of a legacy database in MySQL, which was involved in a nested relationship where one tuple could be the parent record of another tuple. We created the appropriate domain structure and checked that the foreign key references were created accordingly. All well and good. So […]
We already know that by default Grails scaffold comes with Optimistic locking and it is achieved by version field. Now lets see how Pessimistic locking is achieved in Grails. Grails has a built in method to acquire lock on object. To acquire a lock we will do something like following [java] Book book = Book.get(1) […]
Whenever I have the use case of inheritance in my Grails application I prefer to have the single table for all the classes, to avoid joins and multiple save statement. But one thing I dont like about this is its class discriminator which have the full class name in it. I dont find it much readable […]
In Grails, we can have inheritance with the abstract base class as well as persistent base class. Lets take an example to explain this.(All the classes are in the package com.intelligrape.example) [java] class Blog{ String authorName static constraints = { authorName (nullable:false) } } class TextBlog extends Blog{ String textContent static constraints = { textContent […]
Currently I am working on developing mobile app using Phonegap. Phonegap comes up with very nice javascript methods to access phone specific api and the developer like me who have fair knowledge of javascript HTML and CSS can learn it very quickly. My app required bundling the database into the app but there is no […]