You have any suggestions on how I should deal with needing this type of
information in the mean time?...
Typically what I used facet data for was to generate graph data. Instead
of having to go through every match, group it by time, count them up
manually, etc, I would get facet data for timestamps. For instance, I
create a query which says "field1:value" I would then have grabbed the
facets for the Date field use the facet counts to plot a graph with
timestamp/matches.
I was thinking just go through all of the matches for now, which
althrough probably is not nearly as efficient as going using lucene type
facets, would get the trick done temporarily until proper facets are
implemented.
Currently the blur site lists facets as being something that works here...
http://incubator.apache.org/blur/how_it_works.html
But as this thread kinda pointed out, facets the way faceted
classification describes does not exist right now within apache blur. So
someone may want to change that to inform that it is currently on the
todo list or something.
http://en.wikipedia.org/wiki/Faceted_classification
A great example I use to show people what facets are is the following
site...
http://www.fasttech.com/category/1499/consumer-electronics
On the left side, it is easy to see a breakdown of all the different
Fields/Values associated with the current search query. My intention is
to display facet data for all (or the important ones anyway) of the
fields associated with the current query along with a line graph showing
the count of all matching rows for each time interval. Then the query
can be refined more by querying a specific time range, or field.
Is proper facet implementation something that is has a somewhat high
priority and will hopefully be at least partially implemented within the
next couple of weeks/months? Or should I just work on processing all the
results myself for now? Also, I notice the default query matches is only
10, and I see no way to specify unlimited. Can I specify -1 for limited
or something like that, or do I need to specify a really large number
that will always be higher than the number of actual results I am
expecting... like Long.MAX_VALUE or something?
Thanks,
Colton McInroy
* Director of Security Engineering
Phone
(Toll Free)
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On 10/18/2013 8:40 AM, Colton McInroy wrote:
Hello Aaron,
Yes, that's basically what I was thinking of for the facet
results. The current implementation doesn't really make any sense if
your coming from lucene. For simplicity and uniformity, I think it
should be somewhat like it is with lucene... with adaptation to the
way blur is built... I could kinda see something like this...
public static void queryBlur(String queryString, String table) {
Iface client =
BlurClient.getClient(mainConfig.getString("controllers"));
Query query = new Query();
query.setQuery(queryString);
Selector selector = new Selector();
// This will fetch all the columns in family "fam0".
selector.addToColumnFamiliesToFetch("event");
selector.addToColumnFamiliesToFetch("msg");
BlurQuery blurQuery = new BlurQuery();
int matches = 10;
List<Facet> facets = Arrays.asList(new Facet("field1",
matches),new Facet("field2", matches));
blurQuery.setFacets(facets);
blurQuery.setFetch(50);
blurQuery.setQuery(query);
blurQuery.setSelector(selector);
try {
BlurResults results = client.query(table, blurQuery);
for (Facet facet : result.getFacetResults()) {
System.out.println(facet.name+" "+facet.value);
}
} catch (BlurException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
Just a brief modification from what I am doing now. Basically I
just envision a method called getFacetResults which returns
List<Facet> with each Facet object containing a "name" and a "value"
which would be the column name and facet count respectively. I'm just
throwing this out there for now. This is a different way of
implementing the facets than lucene in terms of how the code is
accessed, but it would provide the same results.
It could also be done something like this...
List<Facet> facets = Arrays.asList(new Facet("field1"), new
Facet("field2"));
blurQuery.setFacets(facets, matches);
Depends if the number of matches should be per facet or per query,
although I see the merits in being able to specify the matches for
each field.
Thanks,
Colton McInroy
* Director of Security Engineering
Phone
(Toll Free)
_US_ (888)-818-1344 Press 2
_UK_ 0-800-635-0551 Press 2
My Extension 101
24/7 Support [email protected] <mailto:[email protected]>
Email [email protected] <mailto:[email protected]>
Website http://www.dosarrest.com
On 10/18/2013 5:20 AM, Aaron McCurry wrote:
I have an issue in Jira to document facets in 0.2.1, it's not been
worked
yet but I hope I can get to it soon. It looks like you figured out
what is
there.
We will likely improve facets in 0.3.0 so the API will have to change a
bit. The biggest change we will need to make is the scenario that you
bring up. Facets in the current implementation case are simply other
queries that can range from a single term to a complex query. I'm
assuming
that you would like to specify a field name and get something like a
map of
terms to counts for the given facet?
The field facetCounts are counts that each of the facets in the input
list
from the query. So the count list corresponds one for one to the facet
list in the Query. I realize this is less than ideal and we can
going to
be improving it soon.
If you have some suggestions on how you would want the facet api to
operate, new features, or anything else for that matter just write up
your
thoughts on this thread and we can incorporate them into the task.
Thanks!
Aaron
On Fri, Oct 18, 2013 at 6:43 AM, Colton McInroy
<[email protected]>wrote:
Ok, so I created this method...
public static BlurResults queryBlur(String queryString, String table) {
Iface client = BlurClient.getClient(**mainConfig.getString("**
controllers"));
Query query = new Query();
query.setQuery(queryString);
Selector selector = new Selector();
// This will fetch all the columns in family "fam0".
selector.**addToColumnFamiliesToFetch("**event");
selector.**addToColumnFamiliesToFetch("**msg");
BlurQuery blurQuery = new BlurQuery();
List<Facet> facets = Arrays.asList(new Facet(queryString,
Long.MAX_VALUE));
blurQuery.setFacets(facets);
blurQuery.setFetch(50);
blurQuery.setQuery(query);
blurQuery.setSelector(**selector);
try {
BlurResults results = client.query(table, blurQuery);
return results;
} catch (BlurException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
From reading through source code, I was able to find out that you
specify
facets as a list, but this is fairly confusing to me coming from
lucene.
In lucene when getting facet data, I specify the facet fields I am
interested in, and the facet results show me a top X list of values
within
that field. Whereas with blur, it appears that a facet is another query
which gives only a number as a result. When I tried to obtain the facet
data I am used to with Lucene, the only thing I could find was...
System.out.println("Facet Results: "+results.getFacetCountsSize()**);
System.out.println(JSONArray.**toJSONString(results.**getFacetCounts()));
Could you please elaborate on this.
Thanks,
Colton McInroy
* Director of Security Engineering
Phone
(Toll Free)
_US_ (888)-818-1344 Press 2
_UK_ 0-800-635-0551 Press 2
My Extension 101
24/7 Support [email protected] <mailto:[email protected]>
Email [email protected] <mailto:[email protected]>
Website http://www.dosarrest.com
On 10/18/2013 3:07 AM, Colton McInroy wrote:
I think I wrote this to soon, I believe I just found out how to do it.
I'll test it out and supply some example code if correct to help
others.
Thanks,
Colton McInroy
* Director of Security Engineering
Phone
(Toll Free)
_US_ (888)-818-1344 Press 2
_UK_ 0-800-635-0551 Press 2
My Extension 101
24/7 Support [email protected] <mailto:[email protected]>
Email [email protected] <mailto:[email protected]>
Website http://www.dosarrest.com
On 10/18/2013 2:58 AM, Colton McInroy wrote:
Hey Aaron,
You mentioned a while ago that blur handles facets as well
and that
you would provide an example. Unless I have missed that email, I
haven't
seen an example yet, could you provide one? I just took a quick
look myself
and could not figure it out. I see there is an example
FacetQueryTest.java
in blur-query but that appears to be basically just a copy of the
lucene
file.
