package org.apache.lucene.benchmark.byTask.tasks;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.apache.lucene.benchmark.byTask.PerfRunData;
import org.apache.lucene.benchmark.byTask.feeds.DocMaker;
import org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import java.text.NumberFormat;
import java.io.Reader;
import java.util.List;
/**
* Simple task to test performance of tokenizers. It just
* creates a token stream for each field of the document and
* read all tokens out of that stream.
* <br>Relevant properties: <code>doc.tokenize.log.step</code>.
*/
public class ReadTokensTask extends PerfTask {
/**
* Default value for property <code>doc.tokenize.log.step<code> - indicating how often
* an "added N docs / M tokens" message should be logged.
*/
public static final int DEFAULT_DOC_LOG_STEP = 500;
public ReadTokensTask(PerfRunData runData) {
super(runData);
}
private int logStep = -1;
int count = 0;
int totalTokenCount = 0;
// volatile data passed between setup(), doLogic(), tearDown().
private Document doc = null;
/*
* (non-Javadoc)
* @see PerfTask#setup()
*/
public void setup() throws Exception {
super.setup();
DocMaker docMaker = getRunData().getDocMaker();
doc = docMaker.makeDocument();
}
/* (non-Javadoc)
* @see PerfTask#tearDown()
*/
public void tearDown() throws Exception {
log(++count);
doc = null;
super.tearDown();
}
Token token = new Token();
public int doLogic() throws Exception {
List fields = doc.getFields();
final int numField = fields.size();
Analyzer analyzer = getRunData().getAnalyzer();
int tokenCount = 0;
for(int i=0;i<numField;i++) {
final Field field = (Field) fields.get(i);
final TokenStream stream;
final TokenStream streamValue = field.tokenStreamValue();
if (streamValue != null)
stream = streamValue;
else {
// the field does not have a TokenStream,
// so we have to obtain one from the analyzer
final Reader reader; // find or make Reader
final Reader readerValue = field.readerValue();
if (readerValue != null)
reader = readerValue;
else {
String stringValue = field.stringValue();
if (stringValue == null)
throw new IllegalArgumentException("field must have either TokenStream, String or Reader value");
stringReader.init(stringValue);
reader = stringReader;
}
// Tokenize field
stream = analyzer.reusableTokenStream(field.name(), reader);
}
// reset the TokenStream to the first token
stream.reset();
while(stream.next(token) != null)
tokenCount++;
}
totalTokenCount += tokenCount;
return tokenCount;
}
private void log(int count) {
if (logStep<0) {
// init once per instance
logStep = getRunData().getConfig().get("doc.tokenize.log.step", DEFAULT_DOC_LOG_STEP);
}
if (logStep>0 && (count%logStep)==0) {
double seconds = (System.currentTimeMillis() - getRunData().getStartTimeMillis())/1000.0;
NumberFormat nf = NumberFormat.getInstance();
nf.setMaximumFractionDigits(2);
System.out.println("--> "+nf.format(seconds) + " sec: " + Thread.currentThread().getName()+" processed (add) "+count+" docs" + "; " + totalTokenCount + " tokens");
}
}
/* Simple StringReader that can be reset to a new string;
* we use this when tokenizing the string value from a
* Field. */
ReusableStringReader stringReader = new ReusableStringReader();
private final static class ReusableStringReader extends Reader {
int upto;
int left;
String s;
void init(String s) {
this.s = s;
left = s.length();
this.upto = 0;
}
public int read(char[] c) {
return read(c, 0, c.length);
}
public int read(char[] c, int off, int len) {
if (left > len) {
s.getChars(upto, upto+len, c, off);
upto += len;
left -= len;
return len;
} else if (0 == left) {
return -1;
} else {
s.getChars(upto, upto+left, c, off);
int r = left;
left = 0;
upto = s.length();
return r;
}
}
public void close() {};
}
}