(inline response.) Am 28.09.2011 14:40, schrieb Peter Neubauer: > Hi there, > Neo4j in itself is thread safe, so you can pass it around as a > singleton and access it from different Java threads.
knowing that it should work helped me to make it work. my mistake probably was to pass the instance of EmbeddedGraphDb as a final parameter to the other threads, because it didn't throw up an exception when i took the final keyword out and i can live with checkstyle having a problem with a non-final parameter. > > The HighlyAvailableGraphDatabase for scaling over multiple machines is > part of neo4j-enterprise, so you need to update your maven > dependencies to change "community" for "enterprise". Does that help? > > Cheers, > > /peter neubauer thankyousoverymuch, community will do for now. st.p. from berlin > > GTalk: neubauer.peter > Skype peter.neubauer > Phone +46 704 106975 > LinkedIn http://www.linkedin.com/in/neubauer > Twitter http://twitter.com/peterneubauer > > http://www.neo4j.org - Your high performance graph database. > http://startupbootcamp.org/ - Öresund - Innovation happens HERE. > http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. > > > > On Wed, Sep 28, 2011 at 2:26 PM, st.pa<[email protected]> wrote: >> >> hi, >> >> while i was not trying to use threads, everything went fine. now i need >> concurrent java threads to access the same (embedded?) graph database. >> neo4j-manual.pdf for 1.4.1 says in section 1.1.2. that i should use >> HighlyAvailableGraphDatabase, which is no longer there in 1.5.1 as it >> seems. i have not looked into server and rest api yet, so is there a way >> to do a threaded app with say a queue thread and n worker threads inside >> the jvm that all do their own transactions on the same database >> location? the following exception is what i got for assigning the queue >> thread's embedded db to the worker threads, i guess. >> >> Exception in thread "Thread-6" java.lang.RuntimeException: >> java.nio.channels.ClosedByInterruptException >> at >> org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:603) >> at >> org.neo4j.index.impl.lucene.LuceneDataSource.getIndexSearcher(LuceneDataSource.java:486) >> at org.neo4j.index.impl.lucene.LuceneIndex.query(LuceneIndex.java:248) >> at >> org.neo4j.index.impl.lucene.LuceneIndex$RelationshipIndex.get(LuceneIndex.java:480) >> at de.stp.DatabaseNeo4j.removeUrlQueue(DatabaseNeo4j.java:777) >> at de.stp.util.BufferNeo4j.next(BufferNeo4j.java:194) >> at de.stp.RoboNeo4j.nächsterSchritt(RoboNeo4j.java:452) >> at de.stp.RoboNeo4j.run(RoboNeo4j.java:436) >> at java.lang.Thread.run(Thread.java:619) >> Caused by: java.nio.channels.ClosedByInterruptException >> at >> java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184) >> at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:772) >> at >> org.apache.lucene.store.MMapDirectory$MMapIndexInput.<init>(MMapDirectory.java:225) >> at >> org.apache.lucene.store.MMapDirectory$MMapIndexInput.<init>(MMapDirectory.java:217) >> at org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:209) >> at >> org.apache.lucene.index.CompoundFileReader.<init>(CompoundFileReader.java:66) >> at >> org.apache.lucene.index.CompoundFileReader.<init>(CompoundFileReader.java:55) >> at org.apache.lucene.index.IndexWriter.getFieldInfos(IndexWriter.java:1193) >> at >> org.apache.lucene.index.IndexWriter.getCurrentFieldInfos(IndexWriter.java:1213) >> at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1149) >> at >> org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:590) >> ... 8 more >> >> Thx for any ideas. >> ciao, st.p. >> _______________________________________________ >> Neo4j mailing list >> [email protected] >> https://lists.neo4j.org/mailman/listinfo/user >> > _______________________________________________ > Neo4j mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user > _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
