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The conditions framework should be used for information that is associated with one or more detectors. It should not be used for detector-independent settings on analysis algorithms, as this would force end users to create or locate a properties file for that algorithm. Instead, algorithm settings should use "getter" and "setter" methods on a Driver, e.g. getX() and setX(). This will allow these settings to |
Conditions Formats
The recommended format for storing conditions information is in a zip file. The conditions database conditions framework API makes no assumptions about the format of the conditions data. However, the default implementation of the condition database assumes that the data is stored in zip files or file system directories. The package includes facilities for downloading zip files from the web and caching them, so no web internet connection is required when running analysis or reconstruction jobs, as long as the required conditions have been previously accessed.
The conditions themselves are stored as an arbitrary collection of files, either stored in a filesystem or in a zip file. The most common files used are property files (name, value pairs) or XML files (e.g. for geometry). However, there are no constraints as to which file formats can be used for conditions information.
If storing conditions in zip files is not suitable for your project, there are two options. You can either implement the conditions framework interfaces from scratch, or use the standard implementation with custom conditions reader. If the detector.properties file in the conditions zip file or directory contains a line in the "ConditionsReader: ClassName" format, the framework will instantiate ClassName class and use it in place of the standard reader. The latter option makes it possible to keep some conditions in zip files while fetching others from a database, for example.
Properties Files
Properties files contain line-delimited key, value pairs with the 'equals' as a '=', ':' or ' ' (space). The file extension should be '.properties'.
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