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Diffstat (limited to 'doc/server/plugins/connectors/properties.txt')
| -rw-r--r-- | doc/server/plugins/connectors/properties.txt | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/doc/server/plugins/connectors/properties.txt b/doc/server/plugins/connectors/properties.txt index ae8bf0caa..1cbc4cf65 100644 --- a/doc/server/plugins/connectors/properties.txt +++ b/doc/server/plugins/connectors/properties.txt @@ -1,6 +1,6 @@ .. -*- mode: rst -*- -.. _server-plugins-properties: +.. _server-plugins-connectors-properties: ========== Properties @@ -24,17 +24,37 @@ Properties adds a new dictionary to client metadata instances that maps property file names to PropertyFile instances. PropertyFile instances contain parsed XML data as the "data" attribute. +The XML data in a property file is arbitrary, but a matching ``.xsd`` +file can be created to assign a schema to a property file, which will +be checked when running ``bcfg2-lint``. For instance, given:: + + Properties/dns-config.xml + Properties/dns-config.xsd + +``dns-config.xml`` will be validated against ``dns-config.xsd``. + Usage ===== Specific property files can be referred to in -templates as metadata.Properties[<filename>]. The +templates as ``metadata.Properties[<filename>]``. The data attribute is an LXML element object. (Documented `here <http://codespeak.net/lxml/tutorial.html#the-element-class>`_) -Currently, no access methods are defined for this data, but as we -formulate common use cases, we will add them to the !PropertyFile class -as methods. This will simplify templates. +Currently, only one access method is defined for this data, ``Match``. +``Match`` parses the Group and Client tags in the file and returns a +list of elements that apply to the client described by a set of +metadata. (See :ref:`server-plugins-structures-bundler-index` for +more details on how Group and Client tags are parsed.) For instance:: + + {% python + ntp_servers = [el.text + for el in metadata.Properties['ntp.xml'].Match(metadata): + if el.tag == "Server"] + %} + +As we formulate more common use cases, we will add them to the +!PropertyFile class as methods. This will simplify templates. Accessing Properties contents from TGenshi ========================================== |