/**
 * 
 */
package org.apache.lucene.util;

import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * A default {@link ThreadFactory} implementation that accepts the name prefix
 * of the created threads as a constructor argument. Otherwise, this factory
 * yields the same semantics as the thread factory returned by
 * {@link Executors#defaultThreadFactory()}.
 */
public class NamedThreadFactory implements ThreadFactory {
  private static final AtomicInteger threadPoolNumber = new AtomicInteger(1);
  private final ThreadGroup group;
  private final AtomicInteger threadNumber = new AtomicInteger(1);
  private static final String NAME_PATTERN = "%s-%d-thread";
  private final String threadNamePrefix;

  /**
   * Creates a new {@link NamedThreadFactory} instance
   * 
   * @param threadNamePrefix the name prefix assigned to each thread created.
   */
  public NamedThreadFactory(String threadNamePrefix) {
    final SecurityManager s = System.getSecurityManager();
    group = (s != null) ? s.getThreadGroup() : Thread.currentThread()
        .getThreadGroup();
    this.threadNamePrefix = String.format(NAME_PATTERN,
        checkPrefix(threadNamePrefix), threadPoolNumber.getAndIncrement());
  }

  private static String checkPrefix(String prefix) {
    return prefix == null || prefix.length() == 0 ? "Lucene" : prefix;
  }

  /**
   * Creates a new {@link Thread}
   * 
   * @see java.util.concurrent.ThreadFactory#newThread(java.lang.Runnable)
   */
  public Thread newThread(Runnable r) {
    final Thread t = new Thread(group, r, String.format("%s-%d",
        this.threadNamePrefix, threadNumber.getAndIncrement()), 0);
    t.setDaemon(false);
    t.setPriority(Thread.NORM_PRIORITY);
    return t;
  }

}

@@ -1,16 +1,4 @@
-/**%0A * %0A */%0A
 pack
@@ -24,16 +24,820 @@
 ne.util;
+%0A%0A/**%0A * Licensed to the Apache Software Foundation (ASF) under one or more%0A * contributor license agreements.  See the NOTICE file distributed with%0A * this work for additional information regarding copyright ownership.%0A * The ASF licenses this file to You under the Apache License, Version 2.0%0A * (the %22License%22); you may not use this file except in compliance with%0A * the License.  You may obtain a copy of the License at%0A *%0A *     http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */
 %0A%0Aimport

add missing license header