SPFx – A Simple Logging and Exception Handling Mechanism in SharePoint Framework

Sathish Nadarajan
 
Solution Architect
August 14, 2021
 
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Sometime back, we saw the Logging using the Azure App Insights here. In this article, let us see how to implement the logging and Exception using the SharePoint List in a simpler way.

Create the below classes.

ICustomLogger.ts

import ICustomLogMessage from './ICustomLogMessage';

interface ICustomLogger {
    Log(logMessage: ICustomLogMessage): void;
    Warn(logMessage: ICustomLogMessage): void;
    Verbose(logMessage: ICustomLogMessage): void;
    Error(logMessage: ICustomLogMessage): void;
}

export default ICustomLogger;

CustomLogger.ts

import ICustomLogger from './ICustomLogger'
import ICustomLogMessage from './ICustomLogMessage'
import { sp } from '@pnp/sp/presets/all';
import * as moment from 'moment';

export class CustomLogger implements ICustomLogger {

    public Log = async (logMessage: ICustomLogMessage) => {
        try {
            this.saveLogs(logMessage, "Log");
        } catch (error) {
            //Can't do anything
            console.error(error.Message);
        }
    }

    public Warn = async (logMessage: ICustomLogMessage) => {
        try {
            this.saveLogs(logMessage, "Warn");
        } catch (error) {
            //Can't do anything
            console.error(error.Message);
        }
    }

    public Verbose = async (logMessage: ICustomLogMessage) => {
        try {
            this.saveLogs(logMessage, "Verbose");
        } catch (error) {
            //Can't do anything
            console.error(error.Message);
        }
    }

    public Error = async (logMessage: ICustomLogMessage) => {
        try {
            console.error(logMessage.Message);
            this.saveLogs(logMessage, "Error");
        } catch (error) {
            //Can't do anything
            console.error(error.Message);
        }
    }

    private saveLogs = async (logMessage: ICustomLogMessage, logType: string) => {
        sp.web.lists.getByTitle('ExceptionLogs').items.add({
            WebPartName: logMessage.WebPartName,
            ComponentName: logMessage.ComponentName,
            MethodName: logMessage.MethodName,
            Message: logMessage.Message,

            LogType: logType,
            Date: moment(new Date()).format("MMDDYYYY")
        });
    }
}

const customLogger = new CustomLogger();
export default customLogger;

ICustomLogMessage.ts

interface ICustomLogMessage {
    WebPartName: string,
    ComponentName: string,
    MethodName: string,
    Message: string
}

export default ICustomLogMessage;

I have two interfaces and one implementation class. Now, on the component or any other webpart.ts file, we are going to call the Logging method.

public myMethod = async (): Promise => {
    try {

        customLogger.Log({
            WebPartName: "MyWebPart",
            ComponentName: "MyComponent",
            MethodName: "MyMethod",
            Message: `Entering into the method and the ID is ${Id} and the Country ${country}`
        });

    }
    catch (error) {
        customLogger.Error({
            WebPartName: "MyWebPart",
            ComponentName: "MyComponent",
            MethodName: "MyMethod",
            Message: "Exception Occurred : " + error.message
        });
    }
}

The Log List will be something like,

 

Happy Coding
Sathish Nadarajan

Author Info

Sathish Nadarajan
 
Solution Architect
 
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Sathish is a Microsoft MVP for SharePoint (Office Servers and Services) having 15+ years of experience in Microsoft Technologies. He holds a Masters Degree in Computer Aided Design and Business ...read more
 

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