Programme data export plugin

Introduction

Every Programme may need to export data over the whole programme for Jems service. Jems provides an option to enhance this service according to your specific requirements.
The add-on approach allows to enhance specific parts of the system without change of the core logic. This preserves the benefit of receiving regular updates of the core application.
Jems comes with Add-ons included in the installation package. Further development of add-ons is recommended to every programme who wants to customize the system to individual needs.

Purpose

Create an extension for core application functionalities which are represented but not limited by:

• Programme export data

Every programme receives sample of Jems Add-Ons which contains examples of implementations with the communication interface.

Development Instructions

Note: Development instructions are related to programme data export Add-on!

CustomPluginConfig - Contains definition of Add-ons

“io.interact.jems.plugin“ should be unique for every Add-on

This part of project should not be removed from existing name space io.cloudflight.jems.plugin.config

package io.cloudflight.jems.plugin.config

import org.springframework.context.annotation.ComponentScan
import org.springframework.context.annotation.Configuration

@Configuration
@ComponentScan(basePackages = ["io.interact.jems.plugin"])
open class CustomPluginConfig

In the example/default plugin package you will find currently the following two implementations of the ProgrammeDataExportPlugin:

• ProgrammePartnerDataExportDefaultImpl Contains entry point for partner data export

• ProgrammeProjectDataExportDefaultImpl with the entry point for the project data export

Name space of Add-on implementation could be specified by programme, current implementation is

• io.interact.jems.plugin.programme_data_export.programme_project_data_export

• io.interact.jems.plugin.programme_data_export.programme_project_data_export

The DefaultImpl class names are quite generic and should implement the ProgrammeDataExportPlugin Interface.

Interface implementation

Data export add-ons should implement below Interface:

interface ProgrammeDataExportPlugin : JemsPlugin {

override fun export(exportLanguage: SystemLanguageData, dataLanguage: SystemLanguageData, pluginOptions: String): ExportResult {

in which:

• exportLanguage is the language that should be used for exported texts and labels (document language)

• dataLanguage is the language that should be used to for all the data entered by user (input/data language)

• pluginOptions is the text-input parameters entered by user

  • In order to allow your plugin to receive parameters, you shall modify getDescription() containing the usage of the plugin which shall contain at least a \n.

  • 

Application form export response structure, contains the contentType , fileName and ByteArray of content

class ExportResult(
    val contentType: String,
    val fileName: String,
    val content: ByteArray,
    val startTime: ZonedDateTime? = null,
    val endTime: ZonedDateTime? = null
)

Add-on usability

If Add-ons are to be used, the following startup parameter should be used

• -Dloader.path=[Add-ons] for using the folder 'Add-ons' next to the jems-server as root to scan for Jems Add-ons

Add-on error cases

There are 3 error types supported by the system to inform end users regarding the state of Add-on.

Error	Description
Plugin Error!	General error - you need to run Jems server in console mode to see the cause of the issue. Ex:
Plugin with key "{{pluginKey}}" was not found	Plugin does not implement expected interface
Type of plugin with key "{{pluginKey}}" is not valid	Plugin was found but implementation does not follow expectation of the executed actuion.

In all the cases it is recommended to run Jems server in console mode to get more details about the issue.

Repository

• Add-ons are included in Jems repository.

• All types of add-ons located in jems-add-on folder