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If the external data source contains items which should be published, the data provider must implement the methods needed to maintain the publishing queue. The publishing queue is simply a list of items that are scheduled for publication on a specific date. The layers above the physical layer maintain the dates associated with the publishing queue, so the data provider only needs to store the actual data and implement the methods listed below.
NOTE: Data providers that support publishing should also support properties.
|
Return Value |
Method Name |
Parameters |
Description |
|
bool |
ItemDefinition item
|
Called when the given item should be published. Adds the item
to the publishing queue and stores the action and date along with
the item. Returns True if the publishing queue was updated,
False otherwise.
|
|
|
bool |
DateTime to
|
Called periodically to ensure that the publishing queue does not
grow too large. Removes all items from the queue with dates
up to and including to. Returns True if the
publishing queue was updated, False otherwise.
|
|
|
ID[ ] |
DateTime from
|
Returns an array of items set to be published within the given range (inclusive). |
Note that publishing copies the scheduled items from the external data source into the appropriate publishing target database (usually the web database). The published site then displays these items via the web database. It is also possible to configure a separate site which displays items in an external data source directly, referred to as running the external data source in “live mode”. In this case, the methods described above do not need to be implemented.
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