private void handleException(VirtuosoException e) throws VirtuosoException {
switch (e.getErrorCode()) {
case VirtuosoException.SQLERROR:
throw e;
}
logger.warn(ExceptionUtil.toString(e));
reconnectLoop();
}
private void reconnectLoop() {
for (; ; ) {
try {
logger.info("Attempting to reconnect in 30 seconds");
Thread.sleep(30000);
connectionWrapper.reconnect();
return;
} catch (Exception e) {
logger.debug(ExceptionUtil.toString(e));
}
}
}
/**
* Returns the workflow for extracting property and class definitions from meta-wiki
*
* @return
*/
private static IHandler<IRecord> createWorkflow(Ini ini) throws Exception {
Section backendSection = ini.get("BACKEND_VIRTUOSO");
String dataGraphName = backendSection.get("graphNameData");
String metaGraphName = backendSection.get("graphNameMeta");
String uri = backendSection.get("uri");
String username = backendSection.get("username");
String password = backendSection.get("password");
// Class.forName("virtuoso.jdbc4.Driver").newInstance();
// Connection con = DriverManager.getConnection(uri, username, password);
ConnectionWrapper connectionWrapper = new ConnectionWrapper(uri, username, password);
Section extractorSection = ini.get("PROPERTY_DEFINITION_EXTRACTOR");
String expressionPrefix = extractorSection.get("expressionPrefix");
String propertyPrefix = extractorSection.get("propertyPrefix");
String reifierPrefix = extractorSection.get("reifierPrefix");
Section namespaceMappingSection = ini.get("NAMESPACE_MAPPING");
String filename = namespaceMappingSection.get("filename");
Section harvesterSection = ini.get("HARVESTER");
String technicalBaseUri = harvesterSection.get("technicalWikiUri");
/*
VirtGraph dataGraph = new VirtGraph (graphNameData, uri, username, password);
ISparulExecutor dataSparulExecutor = new VirtuosoJenaSparulExecutor(dataGraph);
VirtGraph metaGraph = new VirtGraph (graphNameMeta, uri, username, password);
ISparulExecutor metaSparulExecutor = new VirtuosoJenaSparulExecutor(metaGraph);
*/
/*
ISparulExecutor dataSparulExecutor =
new SparulStatisticExecutorWrapper(
new VirtuosoJdbcSparulExecutorPreconditionWrapper(
connectionWrapper,
new VirtuosoJdbcSparulExecutor(dataGraphName)));
ISparulExecutor metaSparulExecutor =
new SparulStatisticExecutorWrapper(
new VirtuosoJdbcSparulExecutorPreconditionWrapper(
connectionWrapper,
new VirtuosoJdbcSparulExecutor(metaGraphName)));
*/
// Sparul executor with default graph set to null
ISparulExecutor nullSparulExecutor =
new SparulStatisticExecutorWrapper(
new VirtuosoJdbcSparulExecutorPreconditionWrapper(
connectionWrapper, new VirtuosoJdbcSparulExecutor(null)));
logger.info("Sending a test query to check TTLP privileges");
try {
nullSparulExecutor.insert(new ArrayList<RDFTriple>(), dataGraphName);
} catch (Exception e) {
logger.fatal(ExceptionUtil.toString(e));
throw e;
}
logger.info("Success");
insertSystemTriples(nullSparulExecutor, dataGraphName, metaGraphName);
// Just for testing... remove this when done.
// dataSparulExecutor.executeSelect("Select * {?s ?p ?o . Filter(?o = \"Birthplace\") . }");
PrefixResolver prefixResolver = new PrefixResolver(new File(filename));
// System.out.println(prefixResolver.resolve("rdf:sameAs"));
// System.exit(0);
// MultiHandler is a multiplexer for IHandler<Record> instances
MultiHandler<IRecord> handlerList = new MultiHandler<IRecord>();
// Attach a category delegation handler - this handler delegates
// to other handlers depending on a classification
CategoryHandler<IRecord, String> classifiedHandler =
new CategoryHandler<IRecord, String>(new PageTypeRecordClassifier<IRecord>());
handlerList.handlers().add(classifiedHandler);
// for articles
MultiHandler<IRecord> articleHandlerList = new MultiHandler<IRecord>();
MultiHandler<IRecord> deletionHandlerList = new MultiHandler<IRecord>();
// classifiedHandler.addHandler(articleHandlerList, "2");
classifiedHandler.addHandler(articleHandlerList, "200");
classifiedHandler.addHandler(articleHandlerList, "202");
classifiedHandler.addHandler(deletionHandlerList, "deleted");
// Attach the parsers for class and property definitions
ParseContentRecordHandler parser = new ParseContentRecordHandler();
articleHandlerList.handlers().add(parser);
/*
ComplexGroupTripleManager sys =
new ComplexGroupTripleManager(dataSparulExecutor, metaSparulExecutor);
*/
PropertyDefinitionCleanUpExtractor cleanUp =
new PropertyDefinitionCleanUpExtractor(
propertyPrefix, dataGraphName, metaGraphName, nullSparulExecutor);
articleHandlerList.handlers().add(cleanUp);
TBoxExtractor x =
new TBoxExtractor(
technicalBaseUri,
nullSparulExecutor,
dataGraphName,
metaGraphName,
reifierPrefix,
propertyPrefix,
expressionPrefix,
prefixResolver);
articleHandlerList.handlers().add(x);
deletionHandlerList.handlers().add(x);
// Set up the extractor, which renames resources when a page is moved
// This extractor needs to do alot of more work than what is currently
// implemented - it basically needs to genereate tasks which update
// all affected wiki pages which reference the resources being renamed
/*
RedirectRenameExtractor y =
new RedirectRenameExtractor(
nullSparulExecutor,
metaGraphName,
new Predicate<String>() {
@Override
public boolean evaluate(String arg)
{
return arg == null ? null : arg.startsWith("User:DBpedia-Bot/ontology/");
}
},
new Transformer<String, RDFNode>() {
@Override
public RDFNode transform(String arg)
{
String tmp = arg.substring("User:DBpedia-Bot/ontology/".length());
return new RDFResourceNode(IRI.create("http://dbpedia.org/ontology/" + tmp));
}
}
);
articleHandlerList.handlers().add(y);
*/
return handlerList;
}