https://tomcat.apache.org/: Common code shared by multiple Tomcat components 
public class org.apache.tomcat.util.threads.InlineExecutorService extends java.util.concurrent.AbstractExecutorService
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.tomcat.util.threads.InlineExecutorService
  super_class: java.util.concurrent.AbstractExecutorService
{
  private volatile boolean shutdown;
    descriptor: Z
    flags: (0x0042) ACC_PRIVATE, ACC_VOLATILE

  private volatile boolean taskRunning;
    descriptor: Z
    flags: (0x0042) ACC_PRIVATE, ACC_VOLATILE

  private volatile boolean terminated;
    descriptor: Z
    flags: (0x0042) ACC_PRIVATE, ACC_VOLATILE

  private final java.lang.Object lock;
    descriptor: Ljava/lang/Object;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
         0: .line 24
            aload 0 /* this */
            invokespecial java.util.concurrent.AbstractExecutorService.<init>:()V
         1: .line 30
            aload 0 /* this */
            new java.lang.Object
            dup
            invokespecial java.lang.Object.<init>:()V
            putfield org.apache.tomcat.util.threads.InlineExecutorService.lock:Ljava/lang/Object;
         2: .line 24
            return
        end local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/apache/tomcat/util/threads/InlineExecutorService;

  public void shutdown();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
         0: .line 34
            aload 0 /* this */
            iconst_1
            putfield org.apache.tomcat.util.threads.InlineExecutorService.shutdown:Z
         1: .line 35
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.lock:Ljava/lang/Object;
            dup
            astore 1
            monitorenter
         2: .line 36
            aload 0 /* this */
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.taskRunning:Z
            ifeq 3
            iconst_0
            goto 4
      StackMap locals: org.apache.tomcat.util.threads.InlineExecutorService java.lang.Object
      StackMap stack: org.apache.tomcat.util.threads.InlineExecutorService
         3: iconst_1
      StackMap locals: org.apache.tomcat.util.threads.InlineExecutorService java.lang.Object
      StackMap stack: org.apache.tomcat.util.threads.InlineExecutorService int
         4: putfield org.apache.tomcat.util.threads.InlineExecutorService.terminated:Z
         5: .line 35
            aload 1
            monitorexit
         6: goto 9
      StackMap locals:
      StackMap stack: java.lang.Throwable
         7: aload 1
            monitorexit
         8: athrow
         9: .line 38
      StackMap locals:
      StackMap stack:
            return
        end local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   10     0  this  Lorg/apache/tomcat/util/threads/InlineExecutorService;
      Exception table:
        from    to  target  type
           2     6       7  any
           7     8       7  any

  public java.util.List<java.lang.Runnable> shutdownNow();
    descriptor: ()Ljava/util/List;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
         0: .line 42
            aload 0 /* this */
            invokevirtual org.apache.tomcat.util.threads.InlineExecutorService.shutdown:()V
         1: .line 43
            aconst_null
            areturn
        end local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/tomcat/util/threads/InlineExecutorService;
    Signature: ()Ljava/util/List<Ljava/lang/Runnable;>;

  public boolean isShutdown();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
         0: .line 48
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.shutdown:Z
            ireturn
        end local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/tomcat/util/threads/InlineExecutorService;

  public boolean isTerminated();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
         0: .line 53
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.terminated:Z
            ireturn
        end local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/tomcat/util/threads/InlineExecutorService;

  public boolean awaitTermination(long, java.util.concurrent.TimeUnit);
    descriptor: (JLjava/util/concurrent/TimeUnit;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=5, args_size=3
        start local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
        start local 1 // long timeout
        start local 3 // java.util.concurrent.TimeUnit unit
         0: .line 58
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.lock:Ljava/lang/Object;
            dup
            astore 4
            monitorenter
         1: .line 59
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.terminated:Z
            ifeq 4
         2: .line 60
            aload 4
            monitorexit
         3: iconst_1
            ireturn
         4: .line 62
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.lock:Ljava/lang/Object;
            aload 3 /* unit */
            lload 1 /* timeout */
            invokevirtual java.util.concurrent.TimeUnit.toMillis:(J)J
            invokevirtual java.lang.Object.wait:(J)V
         5: .line 63
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.terminated:Z
            aload 4
            monitorexit
         6: ireturn
         7: .line 58
      StackMap locals:
      StackMap stack: java.lang.Throwable
            aload 4
            monitorexit
         8: athrow
        end local 3 // java.util.concurrent.TimeUnit unit
        end local 1 // long timeout
        end local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    9     0     this  Lorg/apache/tomcat/util/threads/InlineExecutorService;
            0    9     1  timeout  J
            0    9     3     unit  Ljava/util/concurrent/TimeUnit;
      Exception table:
        from    to  target  type
           1     3       7  any
           4     6       7  any
           7     8       7  any
    Exceptions:
      throws java.lang.InterruptedException
    MethodParameters:
         Name  Flags
      timeout  
      unit     

  public void execute(java.lang.Runnable);
    descriptor: (Ljava/lang/Runnable;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
        start local 1 // java.lang.Runnable command
         0: .line 69
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.lock:Ljava/lang/Object;
            dup
            astore 2
            monitorenter
         1: .line 70
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.shutdown:Z
            ifeq 3
         2: .line 71
            new java.util.concurrent.RejectedExecutionException
            dup
            invokespecial java.util.concurrent.RejectedExecutionException.<init>:()V
            athrow
         3: .line 73
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 0 /* this */
            iconst_1
            putfield org.apache.tomcat.util.threads.InlineExecutorService.taskRunning:Z
         4: .line 69
            aload 2
            monitorexit
         5: goto 8
      StackMap locals:
      StackMap stack: java.lang.Throwable
         6: aload 2
            monitorexit
         7: athrow
         8: .line 75
      StackMap locals:
      StackMap stack:
            aload 1 /* command */
            invokeinterface java.lang.Runnable.run:()V
         9: .line 76
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.lock:Ljava/lang/Object;
            dup
            astore 2
            monitorenter
        10: .line 77
            aload 0 /* this */
            iconst_0
            putfield org.apache.tomcat.util.threads.InlineExecutorService.taskRunning:Z
        11: .line 78
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.shutdown:Z
            ifeq 14
        12: .line 79
            aload 0 /* this */
            iconst_1
            putfield org.apache.tomcat.util.threads.InlineExecutorService.terminated:Z
        13: .line 80
            aload 0 /* this */
            getfield org.apache.tomcat.util.threads.InlineExecutorService.lock:Ljava/lang/Object;
            invokevirtual java.lang.Object.notifyAll:()V
        14: .line 76
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 2
            monitorexit
        15: goto 18
      StackMap locals:
      StackMap stack: java.lang.Throwable
        16: aload 2
            monitorexit
        17: athrow
        18: .line 83
      StackMap locals:
      StackMap stack:
            return
        end local 1 // java.lang.Runnable command
        end local 0 // org.apache.tomcat.util.threads.InlineExecutorService this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   19     0     this  Lorg/apache/tomcat/util/threads/InlineExecutorService;
            0   19     1  command  Ljava/lang/Runnable;
      Exception table:
        from    to  target  type
           1     5       6  any
           6     7       6  any
          10    15      16  any
          16    17      16  any
    MethodParameters:
         Name  Flags
      command  
}
SourceFile: "InlineExecutorService.java"