Application logging and tracing

To make a reference to the Logger class in the Swift class files you want to provide with logging capabilities, you call the Logger’s shared method:

// Declaration of method 'shared' in class 'Logger'
public class func shared(named name: String) -> Logger

You provide function shared a String with the name of your class, and it will return the Logger object for that class. So, in your class file MyViewController.swift, it would thus look like the following:

import SAPCommon

class MyViewController: UIViewController {

    private let logger = Logger.shared(named: "MyViewController")

    // etc

}

You can define different logging levels, based on how and what you want to log.

For instance, add a logging statement indicating the application view is loaded successfully in the override func viewDidLoad() function:

override func viewDidLoad() {
    super.viewDidLoad()

    self.logger.debug("Demo application is loaded successfully")
}

In addition to plain text, you can also supply an optional error object, for instance:

self.someOperation {
    if let error = error {
       self.logger.error("Uh-oh... An error happened", error: error)
    }
}

Instead of hard-coding logging levels and settings, you can also retrieve these from SAP Mobile Services for development and operations. Once you have defined logging settings for your application in SAP Mobile Services for development and operations, you can retrieve these settings (among other settings you may have specified) via:

var urlSession = SAPURLSession()
let settingsParameters = SAPcpmsSettingsParameters(backendURL: URL(string: <#domain#>)!, applicationID: <#appid#>)
let settings = SAPcpmsSettings(sapURLSession: urlSession, settingsParameters: settingsParameters)

settings.load(for: .application)