Tutorial Site grails

Adding Customized Authentication for Spring Security Plugin

Anonymous (anonymous@undisclosed.example.com) — 2019-07-19T15:37:11+00:00

Adding Customized Authentication for Spring Security Plugin This is an advance topic, we will try to make thing as simple as possible. You need to first add the spring security plugin to your app first. If not do it like this. If you do not fully understand why you need this, you should go back.

Adding Spring Security Plugin

Anonymous (anonymous@undisclosed.example.com) — 2018-10-10T10:13:52+00:00

Adding Spring Security Plugin Spring security plugin allows your app to authenticate your user, and blocking them from access the functions your they do not have access right. Setup * Add the following in build.gradle dependencies section compile 'org.grails.plugins:spring-security-core:3.2.3'

Controller

Anonymous (anonymous@undisclosed.example.com) — 2018-10-15T16:25:57+00:00

Controller Grails controller mainly handle the HTTP request. It also automatically map a URL to its method. The controller class must located at /grails-app/controllers/ directory. Creating a Controller Grails Console: Type the following code with your own controller name, and a controller with your app package will be created.

Data Source

Anonymous (anonymous@undisclosed.example.com) — 2019-12-27T10:18:49+00:00

Data Source Data source can be setup in application.yml. You need to fill in 3 environments, and they are production, test, and development. Here is an example of it. You need to fill in your own * below. For MS SQL Server Assume using MS SQL Server 2012.

Domain

Anonymous (anonymous@undisclosed.example.com) — 2018-10-19T11:53:02+00:00

Domain In Grails or Spring, Domain is an plain old Java object (POJO) that do the mapping between your app, and the database. In Grails by conversion, we put the domain objects under the directory /grails-ap/domain/YOUR_PACKAGE_NAME/, and Grails will do the rest for us.

List Out All Request Header

Anonymous (anonymous@undisclosed.example.com) — 2018-10-19T15:50:23+00:00

List Out All Request Header //in a controller def showAllHeaders(){ StringBuilder sb = new StringBuilder() request.headerNames.each{ sb.append(it).append(": ").append(request.getHeader(it)) .append("
") } render(sb.toString()) }

Grails 3 Project Directories

Anonymous (anonymous@undisclosed.example.com) — 2018-10-19T11:14:03+00:00

Grails 3 Project Directories The image on the left shows the structure of a Grails 3 project. We will talk about those interesting ones here. build.gradle This is not a directory, but it is import for defining dependencies for your web-app. assets

Interceptor

Anonymous (anonymous@undisclosed.example.com) — 2019-10-18T11:20:24+00:00

Interceptor In Grails, interceptor use the concept of Aspect Oriented Programming (AOP) to intercept the programming logic before or after a controller method. Here we will create an ApiInterceptor which will intercept all the method in a controller

mastering_Domain.createCriteria()

Anonymous (anonymous@undisclosed.example.com) — 2020-08-31T16:55:10+00:00

mastering_Domain.createCriteria() We usually put createCriteria() within a Grails services. In Grails, createCriteria() come with any domain object, and it return a type BuildableCriteria. Most often, we call its list() method to return a list of that domain object. Here is a code copy from the Grails document site:

Mastering GORM Dynamic Finders

Anonymous (anonymous@undisclosed.example.com) — 2018-10-19T11:14:03+00:00

Mastering GORM Dynamic Finders TODO!

Multiple Data Sources

Anonymous (anonymous@undisclosed.example.com) — 2019-12-27T09:36:04+00:00

Multiple Data Sources You need to use one more layer called dataSources <--- with s in your application.yml file. Example (For Application.YML) Assume using MS SQL Server 2012. You need to replace * with your own data. In this example, we have the default

Quartz - Job Scheduler

Anonymous (anonymous@undisclosed.example.com) — 2018-10-11T12:19:01+00:00

Quartz - Job Scheduler Quartz is a job schedule plugin for Grails, sort of like a plugin for cron job. To use it: * Add dependency in build.gradle * Add autoStartup: true in application.yml under section quartz: * In grails console, user create-job

Reading CSV Files

Anonymous (anonymous@undisclosed.example.com) — 2018-10-10T10:13:52+00:00

Reading CSV Files * Adding Apache commons csv library as dependencies * Putting your csv file in the project * Read the CSV file in your code Adding apache commons text library as dependencies Put the following in your build.gradle dependencies{} section. The current version of commons cvs is 1.6. You might want to use a newer version upon its release.

HTTP Rest Client with JSON

Anonymous (anonymous@undisclosed.example.com) — 2019-11-14T16:17:24+00:00

HTTP Rest Client with JSON We can do a HTTP rest request to a server in Grails. Here is how. Add Rest Client Dependencies in build.gradle In order to use rest client, first add the following in the build.gradle compile "org.grails:grails-datastore-rest-client"

Setup Grails 3 Behind Proxy

Anonymous (anonymous@undisclosed.example.com) — 2018-10-10T10:13:51+00:00

Setup Grails 3 Behind Proxy Most companies have set up proxy to protect, and speed up their network, but grails, and gradle would not download the libraries needed correctly behind the proxy without proper setup. Proxy Setting for Grails * Go to the path you install grails.

Setup Grails 3 Development Environment

Anonymous (anonymous@undisclosed.example.com) — 2018-10-10T10:11:57+00:00

Setup Grails 3 Development Environment * Download the latest version (or any version) from * Upzip it to a known directory, d:\grails-3.3.6, for example. * Download and install the required JDK for your Grails version from Oracle. For example, Grails 3.3.6 requires

Spring Security Login Redirection

Anonymous (anonymous@undisclosed.example.com) — 2019-09-10T09:56:38+00:00

Spring Security Login Redirection The redirection after logged in can be controlled in application.groovy by adding the URL-related properties there. For more details, go see the chapter URL Properties in the Grails Spring Security Core Plugin Documentation.

URL Mappings

Anonymous (anonymous@undisclosed.example.com) — 2019-11-22T09:43:29+00:00

URL Mappings Here will will talk about how to map an URL to our method in our controller with parameter. UrlMappings.groovy We add /myController/myMethod/$var1?/$var2?/$var3? in our mapping. This tell Grails when that when the input URL match to this pattern, we should go to

Using Console to Create and Build a Project

Anonymous (anonymous@undisclosed.example.com) — 2018-10-10T10:13:51+00:00

Using Console to Create and Build a Project Create a Project * Assume the development environment has been set up correctly. If not go see Setup Grails 3 Development Environment. * Check to the directory you want to work on. d:\grailsapp for example. C:\>d: D:\>cd\grailsapp D:\grailsapp>

Using IntelliJ IDEA Ultimate IDE

Anonymous (anonymous@undisclosed.example.com) — 2018-10-10T10:13:52+00:00

Using IntelliJ IDEA Ultimate IDE Currently only a few IDE support Grails 3, and they are Netbeans , and Intellij IDEA Ultimate Edition . Note that the Intellij IDEA Community Edition would still able to build and run Grails 3 code, but the syntax highlight would be missing! For this page, we will focus on IntelliJ IDEA Ultimate.