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 java.io.IOException;
import java.util.Collection;
import java.util.Map;
import org.apache.lucene.benchmark.byTask.PerfRunData;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexCommit;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.store.Directory;
/**
* Open an index reader.
* <br>Other side effects: index reader object in perfRunData is set.
* <br> Optional params commitUserData eg. OpenReader(false,commit1)
*/
public class OpenReaderTask extends PerfTask {
public static final String USER_DATA = "userData";
private String commitUserData = null;
public OpenReaderTask(PerfRunData runData) {
super(runData);
}
@Override
public int doLogic() throws IOException {
Directory dir = getRunData().getDirectory();
DirectoryReader r = null;
if (commitUserData != null) {
r = DirectoryReader.open(OpenReaderTask.findIndexCommit(dir, commitUserData));
} else {
r = DirectoryReader.open(dir);
}
getRunData().setIndexReader(r);
// We transfer reference to the run data
r.decRef();
return 1;
}
@Override
public void setParams(String params) {
super.setParams(params);
if (params != null) {
String[] split = params.split(",");
if (split.length > 0) {
commitUserData = split[0];
}
}
}
@Override
public boolean supportsParams() {
return true;
}
public static IndexCommit findIndexCommit(Directory dir, String userData) throws IOException {
Collection<IndexCommit> commits = DirectoryReader.listCommits(dir);
for (final IndexCommit ic : commits) {
Map<String,String> map = ic.getUserData();
String ud = null;
if (map != null) {
ud = map.get(USER_DATA);
}
if (ud != null && ud.equals(userData)) {
return ic;
}
}
throw new IOException("index does not contain commit with userData: " + userData);
}
}