package org.apache.lucene.benchmark.byTask.tasks;

import org.apache.lucene.benchmark.byTask.PerfRunData;

/**
 * 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.
 */

/**
 * Set a performance test configuration property.
 * A property may have a single value, or a sequence of values, seprated by ":". 
 * If a sequence of values is specified, each time a new round starts, 
 * the next (cyclic) value is taken.  
 * Other side effects: none.
 * @see org.apache.lucene.benchmark.byTask.tasks.NewRoundTask
 */
public class SetPropTask extends PerfTask {

  public SetPropTask(PerfRunData runData) {
    super(runData);
  }

  private String name;
  private String value;
  
  public int doLogic() throws Exception {
    if (name==null || value==null) {
      throw new Exception(getName()+" - undefined name or value: name="+name+" value="+value);
    }
    getRunData().getConfig().set(name,value);
    return 0;
  }

  /**
   * Set the params (property name and value).
   * @param params property name and value separated by ','.
   */
  public void setParams(String params) {
    super.setParams(params);
    int k = params.indexOf(",");
    name = params.substring(0,k).trim();
    value = params.substring(k+1).trim();
  }

}