Comments on: An Introduction to Caching http://blogs.sanmathi.org/ashwin/2006/06/27/an-introduction-to-caching/ Music, Politics and Code Sat, 26 Jul 2008 02:59:29 +0000 http://wordpress.org/?v=2.5.1 By: Stake Five :: Tangling with the Template Cache http://blogs.sanmathi.org/ashwin/2006/06/27/an-introduction-to-caching/#comment-7 Stake Five :: Tangling with the Template Cache Wed, 12 Jul 2006 12:58:06 +0000 http://blogs.sanmathi.org/ashwin/?p=27#comment-7 [...] The ColdFusion template cache is an interesting beast; one which taught me a great deal about caching. I’ll be discussing the design of the template cache in this post, along with the rationale behind the approach that was taken, and some explanation of interesting behaviours that the template cache exhibits. Before we venture further, please do read An Introduction to Caching - you’ll need that information to understand the rest of this post. [...] [...] The ColdFusion template cache is an interesting beast; one which taught me a great deal about caching. I’ll be discussing the design of the template cache in this post, along with the rationale behind the approach that was taken, and some explanation of interesting behaviours that the template cache exhibits. Before we venture further, please do read An Introduction to Caching - you’ll need that information to understand the rest of this post. [...]

]]> By: Stake Five :: Memory-sensitive Caching for CF http://blogs.sanmathi.org/ashwin/2006/06/27/an-introduction-to-caching/#comment-6 Stake Five :: Memory-sensitive Caching for CF Sat, 01 Jul 2006 14:12:51 +0000 http://blogs.sanmathi.org/ashwin/?p=27#comment-6 [...] After my introduction to caching post, Doug Hughes asked whether it would be possible to wrap CFCs in soft references to create a memory-sensitive cache for use in CFML. I answered that it should, in theory, be possible, but that an implementation would have to take care of a few common design issues that occur when dealing with soft references. [...] [...] After my introduction to caching post, Doug Hughes asked whether it would be possible to wrap CFCs in soft references to create a memory-sensitive cache for use in CFML. I answered that it should, in theory, be possible, but that an implementation would have to take care of a few common design issues that occur when dealing with soft references. [...]

]]> By: ashwin http://blogs.sanmathi.org/ashwin/2006/06/27/an-introduction-to-caching/#comment-5 ashwin Thu, 29 Jun 2006 17:10:33 +0000 http://blogs.sanmathi.org/ashwin/?p=27#comment-5 I don't see any reason why you wouldn't be able to wrap CFC instances in a SoftReference. However, doing this is not as simple as wrapping up the instances and sticking them in a struct - what can happen is that the value in the struct would get collected by the garbage collector, while the key would remain. You would need to build on top of the ReferenceQueue class in java.lang.ref to ensure that keys get cleared out as well. I'll try and throw a CFC together in the next day or two that'll function as a soft cache and post it back here. I don’t see any reason why you wouldn’t be able to wrap CFC instances in a SoftReference. However, doing this is not as simple as wrapping up the instances and sticking them in a struct - what can happen is that the value in the struct would get collected by the garbage collector, while the key would remain. You would need to build on top of the ReferenceQueue class in java.lang.ref to ensure that keys get cleared out as well. I’ll try and throw a CFC together in the next day or two that’ll function as a soft cache and post it back here.

]]> By: Doug Hughes http://blogs.sanmathi.org/ashwin/2006/06/27/an-introduction-to-caching/#comment-4 Doug Hughes Thu, 29 Jun 2006 12:56:35 +0000 http://blogs.sanmathi.org/ashwin/?p=27#comment-4 Just wondering, is there anyway to use soft reference from within CFML? For example, let's say that I have a structure that I'm caching objects in. What if I wanted the references in that object to be soft so that if Java needed to it could garbage collect them? Essentially, I'm asking if I could create an instance of a Widget cfc and then pass that into a SoftReference and then put the soft reference in the struct? Or, are there just too many references from CF objects to make that really work? Thanks! Just wondering, is there anyway to use soft reference from within CFML? For example, let’s say that I have a structure that I’m caching objects in. What if I wanted the references in that object to be soft so that if Java needed to it could garbage collect them? Essentially, I’m asking if I could create an instance of a Widget cfc and then pass that into a SoftReference and then put the soft reference in the struct? Or, are there just too many references from CF objects to make that really work?

Thanks!

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