File DataSource

PV syntax

The standard prefix for the datasource is file:// which can be omitted if configured as the default datasource.

This datasource allows to read files and treat the contents as a source of data. Whenever a file is updated, the file is reparsed and a notification is sent with the new value.

Supported formats

This package provides support for:


Changes are detected through OS callback if available and supported by the Java JDK. This gives very good performance (no extra load on CPU or disk) but is not available for all systems. In particular, is not available through network file systems (such as NFS).