![]() JTool version 5 and up are available in binary form JTool Binaries. Sources for JTool up to version 4 are available JTool Sources. So JTool allows us to quickly integrate any Java libraries in MERESCO. Meanwhile, it is easy enough to create a Java wrapper and use this via JTool. We have solutions for these omissions which we will implement this year. It also does not support callbacks in Python yet. JTool can not yet call methods with NULL-parameter or Java 5 varargs. This enabled us to insert RDF and execute SPARQL queries on the triple store. Then we tried to load this library in Python using JTool: > import jtool ![]() The latter depends on 22 other Java projects, including the Sesame RDF Framework.Ĭompilation of OWLIM took a bit more effort as we needed to gather all needed jar files and make sure some factories did not get duplicated in the final library. While Lucene is quite a large library, OWLIM is even larger. In February 2010 we started looking for a more scalable Triple Store for MERESCO. Will JTool work for other Java libraries? #Apache lucene python codeThe code base of JTool is only 1500 lines, there is no code generation and it is completely generic. It runs fast, reliable and with low memory footprint. This is how all of Lucene is accessed in MERESCO. > jtool.load('liblucene-core.so') # compiled lucene-core.jar Here is how you use it in Python: $ python Then we created a Python extension called JTool which mirrors the complete Java API in Python. We quickly discovered that compiling Lucene with GCJ was easy and that it resulted in robust, fast and reliable programs. ![]() We decided to try a completely different approach and that turned out to work very well. In 2008 it changed strategy and the performance dropped significantly. PyLucene was unstable and did not cover all of Lucene. MERESCO used PyLucene which compiled Lucene to native machine code. Lucene is a well-known Java library for full-text search. It uses Python to tie these components together. This README file only contains basic setup instructions. MERESCO combines components written in various programming languages. Apache Lucene is a high-performance, full-featured text search engine library written in Java. ![]()
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