{"id":280,"date":"2011-06-21T19:53:15","date_gmt":"2011-06-21T19:53:15","guid":{"rendered":"http:\/\/www.sitekickr.com\/blog\/?p=280"},"modified":"2011-06-21T19:54:18","modified_gmt":"2011-06-21T19:54:18","slug":"coldfusion-session-locking-quick","status":"publish","type":"post","link":"https:\/\/www.sitekickr.com\/blog\/coldfusion-session-locking-quick\/","title":{"rendered":"ColdFusion Session Locking – Keep it quick!"},"content":{"rendered":"

Lately I've been noticing, while examining chunks of ColdFusion code out there, that many folks don't give much thought to what goes on inside their <cflock><\/em><\/a> tags. In the case where you're locking a session scope, so you can update session variables for example, the amount of code executed inside the lock should be as short as possible.<\/p>\n

As an example, take a look at this unnecessarily long lock:<\/p>\n

<cflock scope="session" type="readonly" timeout="5">
\n\t   <cfset variables.calc = 0>
\n\t    <cfloop from="1" to="100000" index="i">
\n\t        <cfset variables.calc = variables.calc + i>
\n\t    <\/cfloop>
\n\t    <cfset session.calc = calc>
\n\t<\/cflock> <\/code><\/p>\n

Why anyone would store the results of the calculation above in a session variable is beyond me! But, it's a great example of what not to do.<\/p>\n

The session lock above is held while the <cfloop><\/em> of 100,000 iterations is run.<\/p>\n

This code is better executed as below:<\/p>\n

<cfset variables.calc = 0>
\n\t<cfloop from="1" to="100000" index="i">
\n\t    <cfset variables.calc = variables.calc + i>
\n\t<\/cfloop>
\n\t<cflock scope="session" type="readonly" timeout="5">
\n\t    <cfset session.calc = calc>
\n\t<\/cflock><\/code><\/p>\n

 <\/p>\n

The same rule would apply to any web development language that offers session management.<\/p>\n","protected":false},"excerpt":{"rendered":"

Lately I've been noticing, while examining chunks of ColdFusion code out there, that many folks don't give much thought to what goes on inside their…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"amp_status":""},"categories":[34,41],"tags":[99],"_links":{"self":[{"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/posts\/280"}],"collection":[{"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/comments?post=280"}],"version-history":[{"count":3,"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/posts\/280\/revisions"}],"predecessor-version":[{"id":283,"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/posts\/280\/revisions\/283"}],"wp:attachment":[{"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/media?parent=280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/categories?post=280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sitekickr.com\/blog\/wp-json\/wp\/v2\/tags?post=280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}