Thanks James: This looks promising. I¹ll repost when I¹ve had a chance to implement this. -scott
On 3/18/16, 10:44 AM, "McKinley, James T" <james.mckin...@cengage.com> wrote: >We use Kryo to pass query objects between hosts: > >https://github.com/EsotericSoftware/kryo > >We initially had some trouble with it creating dynamic classes and >running out of PermGen space but we got around that using an ObjectPool: > >http://commons.apache.org/proper/commons-pool/api-1.6/org/apache/commons/p >ool/impl/StackObjectPool.html > >I've not looked at the project recently, we're using version 2.21 and >there's a 3.0.0 now, so they may have solved the issues we had and made >things nicer, but here's how we're doing it with 2.21: > >To serialize: > >static private ObjectPool<Kryo> pool = new StackObjectPool<Kryo>(new >KryoFactory(), 75, 75); > >ByteArrayOutputStream baos = new ByteArrayOutputStream(); >Output output = new Output(baos); >kryo = pool.borrowObject(); >kryo.writeClassAndObject(output, query); >pool.returnObject(kryo); >output.close(); >String base64EncodedSerializedObject = >Base64.encodeBytes(baos.toByteArray()); > >Where query is a Lucene Query object (I've left out the error handling >for brevity). > >To deserialize: > >ByteArrayInputStream bais = new >ByteArrayInputStream(Base64.decode(encodedQuery)); >Input input = new Input(bais); >kryo = pool.borrowObject(); >deserializedQueryObject = (Query) kryo.readClassAndObject(input); >pool.returnObject(kryo); >input.close(); > >Hope that might help. > >Jim > >________________________________________ >From: Bauer, Herbert S. (Scott) <bauer.sc...@mayo.edu> >Sent: 18 March 2016 10:02 >To: java-user@lucene.apache.org >Subject: Serializing Queries > >Has anyone in this group solved the problem of serializing complex >boolean queries (Some of our clauses have span and other query types)? >Our Java RMI depends upon being able to do so. I have seen posts that >say you can just parse the string representation but apparently that only >works on simple query representations. I¹m looking at the CoreParser >and it¹s supporting xml parsing capabilities with an eye toward >Marshalling the boolean query into a DOM object and unmarshalling it on >the server side using some of the support implied by the CoreParser and >related classes. -scott >--------------------------------------------------------------------- >To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >For additional commands, e-mail: java-user-h...@lucene.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
