Tech Journey With Gagan: August 2025

I created Two methods one for schedule and log in db and second method is related to reschedule message.

Schedule and Reschedule Message

public async Task ScheduleAndLogEmailAsync( NotificationRequest notificationRequest, ScheduleType type,
    DateTime triggerTime,
    DateTime? auctionTime,
    CancellationToken cancellationToken = default)
{
     var MessageId = Guid.NewGuid();
     var sender = _serviceBusClient.CreateSender(_serviceBusConfig.EmailNotificationQueue);
     notificationRequest.MessageId = MessageId.ToString();
     var messageBody = JsonConvert.SerializeObject(notificationRequest);
     var serviceBusMessage = new ServiceBusMessage(messageBody);

    // Schedule the message and get its sequence number
    long sequenceNumber = 0;
    try
    {                
        sequenceNumber = await sender.ScheduleMessageAsync(serviceBusMessage, triggerTime, cancellationToken);
    }
    catch (Exception ex)
    {
        //TODO console error log here;
        var e = ex;
    }
 
     // Log the scheduled message in DB
     using var scope = _serviceScopeFactory.CreateScope();
     var dbContext = scope.ServiceProvider.GetRequiredService<DbContext>();
 
     var scheduledMessage = new ScheduleMessage
     {
         TypeId = type,
         MessageId = MessageId,
         AzureSequenceQueueId = sequenceNumber.ToString(),
         TriggerTime = triggerTime,
         AuctionTime = auctionTime,
         IsProcessed = false,
         NotificationRequestJson = messageBody
     };
 
     dbContext.ScheduleMessages.Add(scheduledMessage);
     await dbContext.SaveChangesAsync(cancellationToken);
}



public async Task ReschedulePendingMessagesAsync(ScheduleType scheduleType, TimeSpan newOffset, CancellationToken cancellationToken = default)
{
    using var scope = _serviceScopeFactory.CreateScope();
    var dbContext = scope.ServiceProvider.GetRequiredService<DbContext>();
    var sender = _serviceBusClient.CreateSender(_serviceBusConfig.EmailNotificationQueue);

    var now = DateTime.UtcNow;

    var pendingMessages = await dbContext.ScheduleMessages
        .Where(x => x.TypeId == scheduleType && !x.IsProcessed && x.Time.HasValue && x.TriggerTime > now)
        .ToListAsync(cancellationToken);

    foreach (var message in pendingMessages)
    {
        var newTriggerTime = message.Time.Value - newOffset;

        // Skip if new trigger time is in the past
        if (newTriggerTime <= DateTime.UtcNow)
            continue;
        // Cancel old scheduled message
        if (long.TryParse(message.AzureSequenceQueueId, out long oldSequenceId))
        {
            try
            {
                await sender.CancelScheduledMessageAsync(oldSequenceId, cancellationToken);
            }
            catch (Exception ex)
            {
                // If already executed or cannot be cancelled, continue silently
                Console.WriteLine($"[Reschedule] Failed to cancel scheduled message with SequenceId: {oldSequenceId}. Reason: {ex.Message}");
            }
        }

        // Reschedule with new trigger time
        var serviceBusMessage = new ServiceBusMessage(message.NotificationRequestJson);
        var newSequenceId = await sender.ScheduleMessageAsync(serviceBusMessage, newTriggerTime, cancellationToken);

        // Update DB
        message.AzureSequenceQueueId = newSequenceId.ToString();
        message.TriggerTime = newTriggerTime;
    }

    await dbContext.SaveChangesAsync(cancellationToken);
}

2. While Process=>

Code Snippet

	private async Task ProcessMessageAsync(ProcessMessageEventArgs args)
    {
    var sequenceId = args.Message.SequenceNumber.ToString();
    if (!string.IsNullOrEmpty(notificationRequest.MessageId))
    {
        // Convert string to Guid
        Guid messageIdGuid;
        if (Guid.TryParse(notificationRequest.MessageId, out messageIdGuid))
        {
            var scheduledRecord = await dbContext.ScheduleMessages
                .FirstOrDefaultAsync(m => m.MessageId == messageIdGuid); 
            if (scheduledRecord != null)
            {
                scheduledRecord.AzureSequenceQueueId = sequenceId;
                scheduledRecord.IsProcessed = true;
                dbContext.ScheduleMessages.Update(scheduledRecord);
                await dbContext.SaveChangesAsync();
            }
        }
        else
        {
            Console.WriteLine("Invalid MessageId format.");
        }
    	}
    }
    <br>

To test follow few steps:

Step 1. Install node
Step 2. create Folder and run these commands

commands

    1. npm init -y 
    2. npm install playwright 
    3. npx playwright install 
    4. npx playwright open -b webkit

Step 3. update package.json 's scripts

package.json

    "scripts": {
    "test:chrome": "npx playwright test --headed --browser=chromium",
    "test:firefox": "npx playwright test --headed --browser=firefox",
    "test:safari": "npx playwright test --headed --browser=webkit"
  }

Step 4. create Test folder in above folder and create file with name browser.test.ts and add below code

browser.test.ts

   import { test } from '@playwright/test'
test.use({
  ignoreHTTPSErrors: true,
});

test('test browser', async ({ page }) => {
  // point this to wherever you want
  await page.goto('http://localhost:4200/')

  // keep browser open
  await page.pause()
})

Step 5. run command npm run test:safari

Tech Journey With Gagan

Monday, August 18, 2025

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Schedule and Reschedule Message

Code Snippet

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commands

package.json

browser.test.ts

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