ColdFusion: Using CFTHREAD

<cfthread>...</cfthread> was introduced in ColdFusion 8; and I had not got chance to use it until recently. Basically, cfthread is used for creating asynchronous/independent processes aside from page-level processing. Here are my notes from playing with the tag and reading CF documentations.

• thread-local scope (local scope in thread): Define the variables with "var" or without specifying a scope name. It is best practice if we specify var to create thread-local-scope variables.
• thread scope: Define the variables with prefix thread. followed by variableName. The thread scope also contain metadata such as elapsedTime, name, status, etc.
  To call thread-scope variables from page thread: threadName.variableName
  To call thread-scope variables from other thread: cfthread.threadName.variableName
• attributes scope: Define via cfthread attribute (<cfthread variableName="value">) or attributeCollection
• threadName.status: NOT_STARTED, RUNNING, TERMINATED, COMPLETED, WAITING
• threadName.error: Exist when there is an error. Use structKeyExists(threadName, "error") to check an error.

Reference: Using thread data