Getting Started with Application Services
Types of Application Services
There are two flavors of Applications Service which are
custom. This section will describe how and when each flavor should be used.
App Functions SDK has a full suite of built-in features that are accessible via configuration when using the
App Service Configurable service. This service is built using the
App Functions SDK and uses configuration profiles to define separate distinct instances of the service. The service comes with a few built in profiles for common use cases, but custom profiles can also be used. If your use case needs can be meet with the built-in functionality then the
App Service Configurable service is right for you. See the App Service Configurable section for more details.
Custom Application Services are needed when use case needs can not be meet with just the built-in functionality. This is when you must develop you own custom Application Service use the
App Functions SDK. Typically this is triggered by the use case needing an custom
Pipeline Function . See the App Functions SDK section for all the details on the features you custom Application Service can take advantage of.
To help accelerate the creation of your custom Application Service the
App Functions SDK contains a template for new custom Application Services. This template has TODO's in the code and a README that walk you through the creation of your new custom Application Service. See the template README for more details.
Triggers are common to both
Custom Application Services. The are the next logical area to get familiar with. See the Triggers section for more details.
Finally service configuration is very important to understand for both
Custom Application Services. The service configuration documentation is broken into two parts. First is the configuration that is common to all EdgeX services and the second is the configuration that is specific to Application Services. See the Common Configuration and Application Service Configuration sections for more details.