/*
 * 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.lucene.tests.util;

import com.carrotsearch.randomizedtesting.ThreadFilter;
import java.util.concurrent.ForkJoinWorkerThread;
import org.apache.lucene.util.Constants;

/** Last minute patches. */
public class QuickPatchThreadsFilter implements ThreadFilter {
  static final boolean isJ9;

  static {
    isJ9 = Constants.JAVA_VENDOR.startsWith("IBM");
  }

  @Override
  public boolean reject(Thread t) {
    if (isJ9) {
      // LUCENE-6518
      if ("ClassCache Reaper".equals(t.getName())) {
        return true;
      }

      // LUCENE-4736
      StackTraceElement[] stack = t.getStackTrace();
      if (stack.length > 0
          && stack[stack.length - 1].getClassName().equals("java.util.Timer$TimerImpl")) {
        return true;
      }
    }

    if (t instanceof ForkJoinWorkerThread
        && t.getName().startsWith("ForkJoinPool.commonPool-worker")
        && t.isDaemon()) {
      // GH-14066: filter out common pool's worker threads. Assume they have completed
      // all background tasks and are idle.
      return true;
    }

    // Also filter out JNA Cleaner threads, which is static per-JVM and not under the
    // control of a test suite.
    return t.getName().equals("JNA Cleaner");
  }
}
