public final class io.netty.util.internal.ObjectCleaner
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: io.netty.util.internal.ObjectCleaner
  super_class: java.lang.Object
{
  private static final int REFERENCE_QUEUE_POLL_TIMEOUT_MS;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static final java.lang.String CLEANER_THREAD_NAME;
    descriptor: Ljava/lang/String;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  private static final java.util.Set<io.netty.util.internal.ObjectCleaner$AutomaticCleanerReference> LIVE_SET;
    descriptor: Ljava/util/Set;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    Signature: Ljava/util/Set<Lio/netty/util/internal/ObjectCleaner$AutomaticCleanerReference;>;

  private static final java.lang.ref.ReferenceQueue<java.lang.Object> REFERENCE_QUEUE;
    descriptor: Ljava/lang/ref/ReferenceQueue;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    Signature: Ljava/lang/ref/ReferenceQueue<Ljava/lang/Object;>;

  private static final java.util.concurrent.atomic.AtomicBoolean CLEANER_RUNNING;
    descriptor: Ljava/util/concurrent/atomic/AtomicBoolean;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final java.lang.Runnable CLEANER_TASK;
    descriptor: Ljava/lang/Runnable;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 36
            sipush 500
            ldc "io.netty.util.internal.ObjectCleaner.refQueuePollTimeout"
            sipush 10000
            invokestatic io.netty.util.internal.SystemPropertyUtil.getInt:(Ljava/lang/String;I)I
            invokestatic java.lang.Math.max:(II)I
         1: .line 35
            putstatic io.netty.util.internal.ObjectCleaner.REFERENCE_QUEUE_POLL_TIMEOUT_MS:I
         2: .line 39
            new java.lang.StringBuilder
            dup
            ldc Lio/netty/util/internal/ObjectCleaner;
            invokevirtual java.lang.Class.getSimpleName:()Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc "Thread"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            putstatic io.netty.util.internal.ObjectCleaner.CLEANER_THREAD_NAME:Ljava/lang/String;
         3: .line 41
            new io.netty.util.internal.ConcurrentSet
            dup
            invokespecial io.netty.util.internal.ConcurrentSet.<init>:()V
            putstatic io.netty.util.internal.ObjectCleaner.LIVE_SET:Ljava/util/Set;
         4: .line 42
            new java.lang.ref.ReferenceQueue
            dup
            invokespecial java.lang.ref.ReferenceQueue.<init>:()V
            putstatic io.netty.util.internal.ObjectCleaner.REFERENCE_QUEUE:Ljava/lang/ref/ReferenceQueue;
         5: .line 43
            new java.util.concurrent.atomic.AtomicBoolean
            dup
            iconst_0
            invokespecial java.util.concurrent.atomic.AtomicBoolean.<init>:(Z)V
            putstatic io.netty.util.internal.ObjectCleaner.CLEANER_RUNNING:Ljava/util/concurrent/atomic/AtomicBoolean;
         6: .line 44
            new io.netty.util.internal.ObjectCleaner$1
            dup
            invokespecial io.netty.util.internal.ObjectCleaner$1.<init>:()V
            putstatic io.netty.util.internal.ObjectCleaner.CLEANER_TASK:Ljava/lang/Runnable;
         7: .line 85
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static void register(java.lang.Object, java.lang.Runnable);
    descriptor: (Ljava/lang/Object;Ljava/lang/Runnable;)V
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=4, args_size=2
        start local 0 // java.lang.Object object
        start local 1 // java.lang.Runnable cleanupTask
         0: .line 95
            new io.netty.util.internal.ObjectCleaner$AutomaticCleanerReference
            dup
            aload 0 /* object */
         1: .line 96
            aload 1 /* cleanupTask */
            ldc "cleanupTask"
            invokestatic io.netty.util.internal.ObjectUtil.checkNotNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            checkcast java.lang.Runnable
         2: .line 95
            invokespecial io.netty.util.internal.ObjectCleaner$AutomaticCleanerReference.<init>:(Ljava/lang/Object;Ljava/lang/Runnable;)V
            astore 2 /* reference */
        start local 2 // io.netty.util.internal.ObjectCleaner$AutomaticCleanerReference reference
         3: .line 99
            getstatic io.netty.util.internal.ObjectCleaner.LIVE_SET:Ljava/util/Set;
            aload 2 /* reference */
            invokeinterface java.util.Set.add:(Ljava/lang/Object;)Z
            pop
         4: .line 102
            getstatic io.netty.util.internal.ObjectCleaner.CLEANER_RUNNING:Ljava/util/concurrent/atomic/AtomicBoolean;
            iconst_0
            iconst_1
            invokevirtual java.util.concurrent.atomic.AtomicBoolean.compareAndSet:(ZZ)Z
            ifeq 11
         5: .line 103
            new io.netty.util.concurrent.FastThreadLocalThread
            dup
            getstatic io.netty.util.internal.ObjectCleaner.CLEANER_TASK:Ljava/lang/Runnable;
            invokespecial io.netty.util.concurrent.FastThreadLocalThread.<init>:(Ljava/lang/Runnable;)V
            astore 3 /* cleanupThread */
        start local 3 // java.lang.Thread cleanupThread
         6: .line 104
            aload 3 /* cleanupThread */
            iconst_1
            invokevirtual java.lang.Thread.setPriority:(I)V
         7: .line 110
            new io.netty.util.internal.ObjectCleaner$2
            dup
            aload 3 /* cleanupThread */
            invokespecial io.netty.util.internal.ObjectCleaner$2.<init>:(Ljava/lang/Thread;)V
            invokestatic java.security.AccessController.doPrivileged:(Ljava/security/PrivilegedAction;)Ljava/lang/Object;
            pop
         8: .line 117
            aload 3 /* cleanupThread */
            getstatic io.netty.util.internal.ObjectCleaner.CLEANER_THREAD_NAME:Ljava/lang/String;
            invokevirtual java.lang.Thread.setName:(Ljava/lang/String;)V
         9: .line 121
            aload 3 /* cleanupThread */
            iconst_1
            invokevirtual java.lang.Thread.setDaemon:(Z)V
        10: .line 122
            aload 3 /* cleanupThread */
            invokevirtual java.lang.Thread.start:()V
        end local 3 // java.lang.Thread cleanupThread
        11: .line 124
      StackMap locals: io.netty.util.internal.ObjectCleaner$AutomaticCleanerReference
      StackMap stack:
            return
        end local 2 // io.netty.util.internal.ObjectCleaner$AutomaticCleanerReference reference
        end local 1 // java.lang.Runnable cleanupTask
        end local 0 // java.lang.Object object
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   12     0         object  Ljava/lang/Object;
            0   12     1    cleanupTask  Ljava/lang/Runnable;
            3   12     2      reference  Lio/netty/util/internal/ObjectCleaner$AutomaticCleanerReference;
            6   11     3  cleanupThread  Ljava/lang/Thread;
    MethodParameters:
             Name  Flags
      object       
      cleanupTask  

  public static int getLiveSetCount();
    descriptor: ()I
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 127
            getstatic io.netty.util.internal.ObjectCleaner.LIVE_SET:Ljava/util/Set;
            invokeinterface java.util.Set.size:()I
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.util.internal.ObjectCleaner this
         0: .line 130
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 132
            return
        end local 0 // io.netty.util.internal.ObjectCleaner this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/util/internal/ObjectCleaner;
}
SourceFile: "ObjectCleaner.java"
NestMembers:
  io.netty.util.internal.ObjectCleaner$1  io.netty.util.internal.ObjectCleaner$2  io.netty.util.internal.ObjectCleaner$AutomaticCleanerReference
InnerClasses:
  io.netty.util.internal.ObjectCleaner$1
  io.netty.util.internal.ObjectCleaner$2
  private final AutomaticCleanerReference = io.netty.util.internal.ObjectCleaner$AutomaticCleanerReference of io.netty.util.internal.ObjectCleaner