/**
* 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.
*/
package org.apache.activemq.store.kahadb.disk.index;
import java.io.IOException;
import java.text.NumberFormat;
import org.apache.activemq.store.kahadb.disk.page.Transaction;
import org.apache.activemq.store.kahadb.disk.util.LongMarshaller;
import org.apache.activemq.store.kahadb.disk.util.StringMarshaller;
public class BTreeIndexBenchMark extends IndexBenchmark {
private NumberFormat nf;
@Override
public void setUp() throws Exception {
super.setUp();
nf = NumberFormat.getIntegerInstance();
nf.setMinimumIntegerDigits(10);
nf.setGroupingUsed(false);
}
@Override
protected Index<String, Long> createIndex() throws Exception {
Transaction tx = pf.tx();
long id = tx.allocate().getPageId();
tx.commit();
BTreeIndex<String, Long> index = new BTreeIndex<String, Long>(pf, id);
index.setKeyMarshaller(StringMarshaller.INSTANCE);
index.setValueMarshaller(LongMarshaller.INSTANCE);
return index;
}
@Override
protected void dumpIndex(Index<String, Long> index) throws IOException {
Transaction tx = pf.tx();
((BTreeIndex)index).printStructure(tx, System.out);
}
/**
* Overriding so that this generates keys that are the worst case for the BTree. Keys that
* always insert to the end of the BTree.
*/
@Override
protected String key(long i) {
return "a-long-message-id-like-key:"+nf.format(i);
}
}