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.index.IndexReader;
/**
* Delete a document by docid. If no docid param is supplied, deletes doc with
* <code>id = last-deleted-doc + doc.delete.step</code>.
*/
public class DeleteDocTask extends PerfTask {
/**
* Gap between ids of deleted docs, applies when no docid param is provided.
*/
public static final int DEFAULT_DOC_DELETE_STEP = 8;
public DeleteDocTask(PerfRunData runData) {
super(runData);
}
private int deleteStep = -1;
private static int lastDeleted = -1;
private int docid = -1;
private boolean byStep = true;
@Override
public int doLogic() throws Exception {
IndexReader r = getRunData().getIndexReader();
r.deleteDocument(docid);
lastDeleted = docid;
r.decRef();
return 1; // one work item done here
}
/* (non-Javadoc)
* @see org.apache.lucene.benchmark.byTask.tasks.PerfTask#setup()
*/
@Override
public void setup() throws Exception {
super.setup();
if (deleteStep<0) {
deleteStep = getRunData().getConfig().get("doc.delete.step",DEFAULT_DOC_DELETE_STEP);
}
// set the docid to be deleted
docid = (byStep ? lastDeleted + deleteStep : docid);
}
@Override
protected String getLogMessage(int recsCount) {
return "deleted " + recsCount + " docs, last deleted: " + lastDeleted;
}
/**
* Set the params (docid only)
* @param params docid to delete, or -1 for deleting by delete gap settings.
*/
@Override
public void setParams(String params) {
super.setParams(params);
docid = (int) Float.parseFloat(params);
byStep = (docid < 0);
}
/* (non-Javadoc)
* @see org.apache.lucene.benchmark.byTask.tasks.PerfTask#supportsParams()
*/
@Override
public boolean supportsParams() {
return true;
}
}