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LuceneReaderImpl.java
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LuceneReaderImpl.java
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package com.caucho.lucene;
import java.io.IOException;
import java.util.Date;
import java.util.concurrent.atomic.AtomicLong;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.inject.Inject;
import io.baratine.service.AfterBatch;
import io.baratine.service.Api;
import io.baratine.service.OnDestroy;
import io.baratine.service.OnInit;
import io.baratine.service.Result;
import io.baratine.service.Service;
import org.apache.lucene.queryparser.classic.QueryParser;
@Service("/lucene-reader")
@Api(LuceneReader.class)
//@Workers(20)
public class LuceneReaderImpl implements LuceneReader
{
private final static AtomicLong sequence = new AtomicLong();
private final static Logger log
= Logger.getLogger(LuceneReaderImpl.class.getName());
@Inject
private LuceneIndexBean _luceneBean;// = LuceneIndexBean.getInstance();
private BaratineIndexSearcher _searcher;
private QueryParser _queryParser;
private long _n;
public LuceneReaderImpl()
{
_n = sequence.getAndIncrement();
}
@OnInit
public void init(Result<Boolean> result)
{
log.log(Level.INFO, this + " init()");
try {
_queryParser = _luceneBean.createQueryParser();
_luceneBean.init();
result.ok(true);
} catch (Throwable t) {
log.log(Level.WARNING, "error creating query parser", t);
result.fail(t);
}
}
private QueryParser getQueryParser()
{
return _queryParser;
}
public void search(String collection,
String query,
Result<LuceneEntry[]> results)
{
if (log.isLoggable(Level.FINER))
log.finer(String.format("search('%1$s', %2$s, %3$tH:%3$tM:%3$tS,:%3$tL)",
collection,
query,
new Date()));
LuceneEntry[] entries = searchImpl(collection, query);
if (log.isLoggable(Level.FINER))
log.log(Level.FINER, String.format("%1$s accepting %2$d lucene entries",
results,
entries.length));
results.ok(entries);
}
public LuceneEntry[] searchImpl(String collection,
String query)
{
QueryParser queryParser = getQueryParser();
try {
if (_searcher == null) {
_searcher = _luceneBean.acquireSearcher();
}
else if (_searcher.getVersion()
< _luceneBean.getSearcherSequence().get()) {
_luceneBean.release(_searcher);
_searcher = _luceneBean.acquireSearcher();
}
LuceneEntry[] entries = _luceneBean.search(_searcher,
queryParser,
collection,
query,
255);
return entries;
} catch (Throwable e) {
log.log(Level.WARNING, e.getMessage(), e);
if (e instanceof RuntimeException)
throw (RuntimeException) e;
else
throw new RuntimeException(e);
}
}
@AfterBatch
public void afterBatch() throws IOException
{
try {
if (_searcher != null) {
_luceneBean.release(_searcher);
}
} catch (IOException e) {
log.log(Level.WARNING, e.getMessage(), e);
} finally {
_searcher = null;
}
}
@OnDestroy
public void onDestroy()
{
log.log(Level.INFO, String.format("%1$s destroy", this));
}
@Override
public String toString()
{
return LuceneReaderImpl.class.getSimpleName() + '[' + _n + ']';
}
}