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Lucene example source code file (WaitTask.java)

This example Lucene source code file (WaitTask.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

exception, exception, illegalargumentexception, illegalargumentexception, override, override, perftask, waittask, waittask

The Lucene WaitTask.java source code

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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

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

 * Simply waits for the specified (via the parameter) amount
 * of time.  For example Wait(30s) waits for 30 seconds.
 * This is useful with background tasks to control how long
 * the tasks run.
 *<p>You can specify h, m, or s (hours, minutes, seconds) as
 *the trailing time unit.  No unit is interpreted as
public class WaitTask extends PerfTask {

  private double waitTimeSec;

  public WaitTask(PerfRunData runData) {

  public void setParams(String params) {
    if (params != null) {
      int multiplier;
      if (params.endsWith("s")) {
        multiplier = 1;
        params = params.substring(0, params.length()-1);
      } else if (params.endsWith("m")) {
        multiplier = 60;
        params = params.substring(0, params.length()-1);
      } else if (params.endsWith("h")) {
        multiplier = 3600;
        params = params.substring(0, params.length()-1);
      } else {
        // Assume seconds
        multiplier = 1;

      waitTimeSec = Double.parseDouble(params) * multiplier;
    } else {
      throw new IllegalArgumentException("you must specify the wait time, eg: 10.0s, 4.5m, 2h");

  public int doLogic() throws Exception {
    Thread.sleep((long) (1000*waitTimeSec));
    return 0;

  public boolean supportsParams() {
    return true;

Other Lucene examples (source code examples)

Here is a short list of links related to this Lucene WaitTask.java source code file:

my book on functional programming


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