Welcome to Creare's Web Access Portal! This software allows you to view RBNB channels via your webbrowser. Simply click on the channel you are interested in, and it will be displayed. If the channel has an extension with a MIME type (such as .jpg), the channel will be shown by that type; otherwise, plain text is used. This technology is powered by JSP and Servlets running on a Tomcat servlet host.
For more information on RBNB technology, visit RBNB Home. For more information about servlets, please see Sun's informative white papers located here. For JSP, here. Lastly, for more information about the Tomcat project, a subset of the Jakarta effort, visit their homepage, jakarta.apache.org.
The options in this portion of the form determine what entries are displayed in the list to the right of the form.
The header form has a field that allows you to enter the Internet Address of the RBNB to which you wish to connect. Be aware that the server which your browser is talking to determines the connectivity of this form; that is, if a webserver is running the WebAccess servlet at Creare, it will not be able to see an RBNB running behind your firewall.
The Channel Match field specifies which channels available on the connected server are listed in the summary to the left. The default is the ellipsis, "...", which means to include all channels recursively from the root. You may specify "[Source]/...", where [Source] is the name of a data source connected to the RBNB. As of this writing, the use of "..." on lower channel levels is not implemented.
The keyword match allows the user to specify that only channels which contain the specified keywords, separated by spaces, within their meta-data should be displayed. This implies that the meta-data needs to be text.
If this field is blank, no search is performed.
The options within this section of the form determine which data the server fetches when the user presses a link.
This field allows you to select between Meta Data, static data stored on the server in its registration map, or Source Data, dynamic data stored in the ring buffer. If meta data is selected, the next three options (Start, Duration, and Reference) do not apply.
The Start field allows you to enter a time value at which the data should be acquired. The default units for time is seconds, but can be whatever the data source specified (e.g. incremental counts). The "Reference" value further modifies how time is interpreted (see below).
The Duration field determines the amount of data to fetch, in source-units (e.g. in seconds). A value of 0 is a special case, signifying that the single last point (object) of data is to be returned.
The Reference field determines how the Start and Duration fields are interpreted, as follows:
This field allows you to filter through a PlugIn any channels you select. A popular selection is the PNGPlugIn, which displays time domain vector data as a plot in the Portable Network Graphic format.
First release.
Removed version field; no longer supports V1.0 RBNBs.
Added folder display, keyword matching options.
Currently, RBNB channels with question marks, ampersands, percent signs, or other characters with special meaning in URLs are not correctly displayed by this Servlet.