In enterprise SAP-UI5 applications, component reuse is a fundamental approach to building scalable, maintainable, and modular applications. Components encapsulate UI, logic, and resources, enabling developers to reuse functionality across multiple applications or within different parts of the same application. Proper use of component reuse promotes code consistency, reduces development effort, and simplifies maintenance.
This article explores how to implement UI5 component reuse effectively in the SAP environment.
A UI5 Component is a reusable module that packages together:
The component acts as an application or a building block that can be integrated into other UI5 applications.
A typical component folder includes:
/webapp
/controller
/view
/css
/i18n
Component.js
manifest.json
The Component.js file extends sap.ui.core.UIComponent and acts as the component entry point.
sap.ui.define([
"sap/ui/core/UIComponent"
], function (UIComponent) {
"use strict";
return UIComponent.extend("my.company.reusable.Component", {
metadata: {
manifest: "json"
},
init: function () {
UIComponent.prototype.init.apply(this, arguments);
// Additional initialization if needed
}
});
});
The manifest describes component metadata, models, routing, and dependencies.
{
"sap.app": {
"id": "my.company.reusable",
"type": "component",
"i18n": "i18n/i18n.properties"
},
"sap.ui5": {
"rootView": {
"viewName": "my.company.reusable.view.Main",
"type": "XML",
"async": true,
"id": "mainView"
}
}
}
In the consuming app’s manifest.json under sap.ui5:
{
"dependencies": {
"minUI5Version": "1.71",
"libs": {},
"components": {
"my.company.reusable": {
"lazy": false
}
}
}
}
In your app’s controller or Component.js, instantiate the reusable component:
sap.ui.define([
"sap/ui/core/UIComponent",
"sap/ui/core/ComponentContainer"
], function (UIComponent, ComponentContainer) {
"use strict";
return UIComponent.extend("my.company.app.Component", {
init: function () {
UIComponent.prototype.init.apply(this, arguments);
var oComponentContainer = new ComponentContainer({
name: "my.company.reusable",
height: "100%"
});
this.getRootControl().byId("content").addItem(oComponentContainer);
}
});
});
And in your view (XML):
<VBox id="content" />
This embeds the reusable component inside your application UI.
You can pass startup parameters to components during instantiation:
var oComponentContainer = new ComponentContainer({
name: "my.company.reusable",
settings: {
someParam: "value"
},
height: "100%"
});
Inside the component, access parameters via:
this.getComponentData().startupParameters.someParam;
Components can expose custom events to communicate with the hosting app:
// In reusable component controller
this.fireEvent("customEvent", { data: "example" });
// In hosting app
oComponentContainer.getComponentInstance().attachEvent("customEvent", function(oEvent) {
var data = oEvent.getParameter("data");
// handle event
});
Implementing UI5 component reuse is a best practice that brings modularity, scalability, and maintainability to SAP-UI5 projects. By encapsulating UI and business logic into reusable components, you can accelerate development, ensure consistency, and foster collaboration across SAP teams.
Leverage the powerful component model of SAP-UI5 to build sophisticated enterprise applications that stand the test of time and complexity.