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Message from discussion Multilevel index and TimelineIndex
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Mattias Persson  
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 More options Oct 24 2012, 1:54 pm
From: Mattias Persson <matt...@neotechnology.com>
Date: Wed, 24 Oct 2012 19:54:10 +0200
Local: Wed, Oct 24 2012 1:54 pm
Subject: Re: [Neo4j] Multilevel index and TimelineIndex
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That sounded like a pretty basic Java question, am I right? You construct
the timeline index and keep a reference to it, which you use for adding,
removing and querying the timeline index. Like so:

  TimelineIndex index = new LuceneTimeline( db, db.index().forNodes(
"my-timeline" ) );
  // and then later on adding to it...
  index.add( myNode, timestampForMyNode );

2012/10/17 Luanne Coutinho <luanne.couti...@gmail.com>

> Mattias, how do I get a handle back to a LuceneTimeline I've created? I
> just see a constructor.

> Thanks
> Luanne

> On Mon, Oct 15, 2012 at 5:08 PM, Luanne Coutinho <
> luanne.couti...@gmail.com> wrote:

>> Hmm so I can just as well index various events by type, and use this to
>> fetch them.
>> Are there any performance gains/losses using one way or the other?

>> I think initially, for a spike, the LuceneTimeline will be simple enough.
>> If my timeline grows to be more complicated, I can always introduce the
>> multilevel index.

>> Thanks
>> Luanne

>> On Mon, Oct 15, 2012 at 4:49 PM, Mattias Persson <
>> matt...@neotechnology.com> wrote:

>>> LuceneTimeline is just a tiny abstraction of a normal index where it
>>> indexes entities given timestamps, using the numerical functionality of
>>> Lucene (and inherently the Lucene backed neo4j indexes). Also querying uses
>>> Lucene range queries to find the entities within the given timestamps. All
>>> that's in there can be done using normal Lucene backed neo4j indexes. See
>>> https://github.com/neo4j/community/blob/master/lucene-index/src/main/...

>>> 2012/10/15 Luanne Coutinho <luanne.couti...@gmail.com>

>>>>  Hi,

>>>> I was going to use the multilevel index described in
>>>> http://docs.neo4j.org/chunked/milestone/cypher-cookbook-path-tree.htm... events to a timeline and write queries to fetch certain types of events
>>>> within a date range.
>>>> Noticed that there is a LuceneTimeline in org.neo4.index.lucene.
>>>> It appears that this is useful for getting all entities within a range
>>>> irrespective of the type of entity (determined by relations/properties etc)?
>>>> Is there any place that has more documentation/examples/usage for
>>>> LuceneTimeline? Would like to understand fully what it's used for before I
>>>> go build a multilevel index.

>>>> Thanks

>>>> Luanne

>>>> --

>>> --
>>> Mattias Persson, [matt...@neotechnology.com]
>>> Hacker, Neo Technology
>>> www.neotechnology.com

>>> --

>  --

--
Mattias Persson, [matt...@neotechnology.com]
Hacker, Neo Technology
www.neotechnology.com

 
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