/*
 * 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.iotdb.db.utils;

import java.io.Closeable;

import static java.util.Objects.requireNonNull;

public class SetThreadName implements Closeable {
  private final String originalThreadName;

  public SetThreadName(String suffix) {
    requireNonNull(suffix, "Suffix is null");
    originalThreadName = Thread.currentThread().getName();
    int index = originalThreadName.indexOf("$");
    if (index < 0) {
      Thread.currentThread().setName(originalThreadName + '$' + suffix);
    } else {
      Thread.currentThread().setName(originalThreadName.substring(0, index) + '$' + suffix);
    }
  }

  @Override
  public void close() {
    Thread.currentThread().setName(originalThreadName);
  }
}
