Monitor File Operator

The Monitor File operator defines a wait for a condition on a file or directory. This operator lets you delay processing in a process for the existence or absence of a file or directory.

The available conditions are:

The existence of a file, and optionally, a minimum size (in bytes).
The absence of a file.
The presence of strings matching a pattern in a file.

A stability timer specifies the minimum delay during which the condition must continuously hold before returning that the operator is successfully completed. For example, this operator can specify the minimum size of a file that an FTP transfer sends.

Tests on a file are discrete. This operator does not indicate that a condition is continuously present. Rather, the Watch File operator indicates that the condition is met at every test interval that the operator performs.