Introduction to Azure Logger

Azure Logger is a powerful logging library designed for applications hosted on Microsoft Azure. It provides robust logging features that help developers monitor and troubleshoot their applications effectively. In this blog post, we will explore various APIs offered by Azure Logger with practical code snippets and a sample application to demonstrate its effectiveness.

Getting Started with Azure Logger

First, install the Azure Logger package in your project:

npm install azure-logger

Initializing Azure Logger

Initialize the logger with your Azure credentials:

const { AzureLogger } = require('azure-logger');

const logger = new AzureLogger({
  appName: 'MyApp',
  azureStorageAccount: 'myAzureAccount',
  azureAccessKey: 'myAccessKey'
});

Logging Information

Log informational messages:

logger.info('This is an informational message.');

Logging Warnings

Log warning messages:

logger.warn('This is a warning message.');

Logging Errors

Log error messages:

logger.error('This is an error message.');

Logging Debug Messages

Log debug messages:

logger.debug('This is a debug message.');

Logging with Metadata

Log messages with additional metadata:

logger.info('User login', { userId: '12345', userName: 'john_doe' });

Sample Application Using Azure Logger

Here’s a simple application that demonstrates how to use Azure Logger for logging:

const express = require('express');
const { AzureLogger } = require('azure-logger');

const app = express();
const logger = new AzureLogger({
  appName: 'MyApp',
  azureStorageAccount: 'myAzureAccount',
  azureAccessKey: 'myAccessKey'
});

app.use((req, res, next) => {
  logger.info('Incoming request', { method: req.method, url: req.url });
  next();
});

app.get('/api/data', (req, res) => {
  try {
    // Simulate data fetching
    const data = { id: 1, name: 'Sample Data' };
    logger.info('Data fetched successfully', { data });
    res.json(data);
  } catch (error) {
    logger.error('Error fetching data', { error });
    res.status(500).send('Internal Server Error');
  }
});

app.listen(3000, () => {
  logger.info('Server started on port 3000');
});

With these features, Azure Logger can significantly enhance your application’s logging capabilities, making it easier to monitor and troubleshoot in an Azure environment.

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