The READER Interface

The READER class provides an abstract interface to the historical and control data of the data source. The minimal READER should provide 3 methods

• GetGroupInfo - returns annotated list of all logging groups.
• GetItemList - returns list of all channels in the specified logging group.
• GetRawData - returns Iterator object with requested data.

The SEARCH Subsystem

ADEI has a modular search subsystem. The search capabilities are provided by the search engines which providing one-or-more search modules. Besides the search term, the search string may specify the search modules to perform search. The module parameters could be specified along with the modules...

Providing additional data using ADEI Web Interface

Examples of additional data are:

• The alarms registered during the data collection by control systems
• The system operator messages
• The information about events registered by DAQ subsystem
• Anything else...

This section describes how the additional data could be provided using ADEI Web Interface. The simplest approach is to provide a service generating an XML data, and XSLT stylesheet which would convert it to HTML. Of course it is possible to generate directly XHTML, but with XML+XSLT approach it is easier to alter presentation form and establish some automation (the XML service could be used by 3rd party client applications). After the service is ready, the new ADEI module (an extra page in the upper menu) should be created and registered in configuration.

So, the following steps should be taken to setup extra ADEI page:

• Create a service and put it in the services/ subdirectory (see description here)
• Create a module and put it in the modules/ directory (see description here)
• Create a XSLT stylesheet which accepts produced XML and generates HTML to be displayed and put it in the xslt/ folder.
• Optionally, if additional parameters, like target for multi-task services, should be passed to the service, special update service should be created in services/update/ directory (see details)
• The module should be registered in $MODULES variable in the configuration file config.php. Be careful, some of the global configuration options specified in the config.php located in the root folder of ADEI installation may be overriden in setups by setup-specific configuration file.