Specific Indexing
Compass supports the ability to completely index external content (for example, a database mapped using an ORM) using very simple API:
1 2 | ComapssGps gps = // ... gps.index(); |
This indexing process is a parallel indexing process (by default) based on the number of sub indexes, and will go and fetch all the data mapped using the ORM tool and index it using Compass. The old content of the index (for all types) will be replaced by the new content.
Some Compass users have suggested a (very) valid feature request of being able to just index specific types. So now, this feature is available in trunk (todays nightly will have it). Here is what it looks like:
1 2 | ComapssGps gps = // ... gps.index(Person.class, Account.class); |
This will only index the Person class and Account class data (in parallel if possible) and replace only their respective sub indexes. The rest of the index will remain the same.
Now, the only thing left is for the Grails Searchable Plugin to enable it so people will be able to this: Person.index() in groovy.
Finally I can go to bed ;)
March 21st, 2008 at 1:22 am
Shay, what is the reason for such function? If I am not mistaken the Compass indexes all classes having specific annotation (while these classes also have to be added into classMappings list). Does it mean that I can use this new function to force complete re-indexing data for specific class only (and this class has to have annotation and is included in the mappings list - of course)? In other words this function allows me to rebuild portion (aka subindex) of whole index from the scratch, correct? Is there any other use case?
March 21st, 2008 at 3:20 am
Yes, that is basically what it does.
March 21st, 2008 at 8:01 am
This is awesome work!
March 22nd, 2008 at 9:03 am
Actually the Grails Searchable Plugin already has quite rich index management capabilities ;-)
It is possible to do stuff like:
Person.indexAll() // indexes all Person instances
Person.unindexAll() removes all Person instances from the index
person.index() // indexes a specific Person instance
Person.index(john, mary, kate) // indexes specific instances
Person.index(1l, 2l, 3l) // indexes specific instances by id
searchableService.reindexAll() // do a complete index (using compassGps.index())
searchableService.index([class: Post], 1l, 2l, 3l) // index specific instances of Post by id using the service interface
And more…
See http://grails.org/Searchable+Plugin+-+Managing+the+index
March 22nd, 2008 at 9:25 am
Interesting… . How do you implement Person.indexAll()? Is it similar to what suggested in this blog post?
March 22nd, 2008 at 10:48 am
Actually I just checked the code and Person.indexAll() isn’t supported for performance reasons! My bad.
So I definitely need this feature in the plugin :-)
April 2nd, 2008 at 10:56 am
Awesome.. I’ve had requests for this feature from co-workers many times. Thanks Shay!