content: /**
   * 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);
      }
  
  }
  