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Working with Server.cfc and onServerStart

From: ColdFusion 9 New Features

Video: Working with Server.cfc and onServerStart

The new Server.cfc is a server-wide file that will run on every server start, allowing you to perform work to get the server setup and ready to go before any of your applications are actually started. In this video, I'll show you how to configure and make use of the Server.cfc. So to begin with we need to actually enable the Server.cfc and that's done inside the ColdFusion Administrator. So inside the ColdFusion Admin on the Settings page near the bottom here, we have Component with onServerStart method.

Working with Server.cfc and onServerStart

The new Server.cfc is a server-wide file that will run on every server start, allowing you to perform work to get the server setup and ready to go before any of your applications are actually started. In this video, I'll show you how to configure and make use of the Server.cfc. So to begin with we need to actually enable the Server.cfc and that's done inside the ColdFusion Administrator. So inside the ColdFusion Admin on the Settings page near the bottom here, we have Component with onServerStart method.

So this is going to be either an absolute path or a dot-delimited the path from the web root that determines where our Server.cfc is. By default ColdFusion will look in the Server CFC underneath the web root, if you don't specify one. So here we'll specify Chapter2.server, and now I check that box that says we are going to enable it. If I scroll down to bottom, I'll click Submit Changes. We see that the server has been updated successfully, so we can go back to CF Builder and take a look at our Server.cfc.

I'll open that file and in here we only have one method, which is onServerStart. This is the method that will be executed when the server actually spins up. So in this case what I'm going to do is send myself an email that tells me that the server has been started and then I'll set a server variable that says the date and time that server will start. So now that I have everything setup, let's go over here to Servers, right-click on my server, and choose Restart.

Now I'll switch over to the Console here, and we can see that it has stopped ColdFusion and it is now starting. Go ahead and make this larger. We can see that after everything that ColdFusion needed to do is finished, the last item here shows that it invoked the onServerStart method on CFC Chapter2.Server. So now if I go and check my email, I should have an email that tells me that the server has started. So go ahead and take a look at this email, and we can see that the server was started at 2009-09-15 at 3:40 in the afternoon.

So let's go back to CF Builder and double check that our server variable was set correctly. So what I'll do here is just create a new file to test with. I will call this scribble.cfm and we'll dump the server scope. If I view that here and take a look, we can see server.started is set to 2009-09-15 at 3:40 in the afternoon. So now you can see that the Server.cfc will allow us to send our emails when the server gets started. Setup server's scope variables, but as I said earlier there are some things it can't do, such as using any feature that requires the full server to be started.

For example, we can't use a cfhttp tag with a URL that specifies a location on the same server, and we can't use any application or request-scope variables in the method. Now if any error happens, you're not going to be notified at all. So make a habit of checking your server logs to be sure that your onServerStart is running correctly. So using the new Server.cfc gives you one more hook to let you know what's going on with your server. It provides a handy way to setup server-wide resources before any applications get kicked off.

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This video is part of

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ColdFusion 9 New Features

36 video lessons · 2904 viewers

Daniel Short
Author

 
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  1. 4m 30s
    1. Welcome
      53s
    2. Using the exercise files
      3m 37s
  2. 7m 48s
    1. Adding managing and comparing servers
      5m 26s
    2. Monitoring server health
      2m 22s
  3. 22m 10s
    1. Setting the default data source and SMTP
      5m 6s
    2. Getting programmatic debugging and exception handling
      5m 54s
    3. Reviewing the new onCFCRequest method
      5m 29s
    4. Using ApplicationStop()
      2m 24s
    5. Working with Server.cfc and onServerStart
      3m 17s
  4. 17m 45s
    1. Using ternary and chained operations
      5m 46s
    2. Using New and Import
      4m 2s
    3. Reviewing CFScript enhancements
      7m 57s
  5. 20m 23s
    1. Building with implicit getters and setters
      4m 26s
    2. Working with LOCAL scope in functions
      4m 35s
    3. Serializing objects
      6m 6s
    4. Writing components in CFScript
      5m 16s
  6. 19m 27s
    1. Getting started with ORM
      5m 51s
    2. Logging ORM activity
      2m 13s
    3. Saving objects to the database
      6m 10s
    4. Defining table relationships
      5m 13s
  7. 16m 59s
    1. Caching page fragments
      5m 29s
    2. Managing the cache
      4m 48s
    3. Working with in-memory files using VFS (RAM disks)
      6m 42s
  8. 12m 39s
    1. Working with Excel spreadsheets
      4m 56s
    2. Working with Word documents
      4m 4s
    3. Working with PowerPoint presentations
      3m 39s
  9. 28m 58s
    1. Loading Google maps with markers onto a page
      4m 53s
    2. Adding a Flash movie with the built-in FLV player
      2m 14s
    3. Using multi-file upload control
      6m 7s
    4. Building a progress indicator
      3m 37s
    5. Working with accordion layouts
      3m 18s
    6. Showing information with data grid enhancements
      5m 1s
    7. Informing users with Confirm Alert and Prompt dialog boxes
      3m 48s
  10. 9m 8s
    1. Accessing IMAP accounts
      6m 31s
    2. Working with the new array functions
      2m 37s
  11. 15s
    1. Goodbye
      15s

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