final class io.netty.util.concurrent.ScheduledFutureTask<V> extends io.netty.util.concurrent.PromiseTask<V> implements io.netty.util.concurrent.ScheduledFuture<V>, io.netty.util.internal.PriorityQueueNode
minor version: 0
major version: 59
flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
this_class: io.netty.util.concurrent.ScheduledFutureTask
super_class: io.netty.util.concurrent.PromiseTask
{
private static final java.util.concurrent.atomic.AtomicLong nextTaskId;
descriptor: Ljava/util/concurrent/atomic/AtomicLong;
flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
private static final long START_TIME;
descriptor: J
flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
private final long id;
descriptor: J
flags: (0x0012) ACC_PRIVATE, ACC_FINAL
private long deadlineNanos;
descriptor: J
flags: (0x0002) ACC_PRIVATE
private final long periodNanos;
descriptor: J
flags: (0x0012) ACC_PRIVATE, ACC_FINAL
private int queueIndex;
descriptor: I
flags: (0x0002) ACC_PRIVATE
static final boolean $assertionsDisabled;
descriptor: Z
flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC
static void <clinit>();
descriptor: ()V
flags: (0x0008) ACC_STATIC
Code:
stack=2, locals=0, args_size=0
0: ldc Lio/netty/util/concurrent/ScheduledFutureTask;
invokevirtual java.lang.Class.desiredAssertionStatus:()Z
ifne 1
iconst_1
goto 2
StackMap locals:
StackMap stack:
1: iconst_0
StackMap locals:
StackMap stack: int
2: putstatic io.netty.util.concurrent.ScheduledFutureTask.$assertionsDisabled:Z
3: new java.util.concurrent.atomic.AtomicLong
dup
invokespecial java.util.concurrent.atomic.AtomicLong.<init>:()V
putstatic io.netty.util.concurrent.ScheduledFutureTask.nextTaskId:Ljava/util/concurrent/atomic/AtomicLong;
4: invokestatic java.lang.System.nanoTime:()J
putstatic io.netty.util.concurrent.ScheduledFutureTask.START_TIME:J
return
LocalVariableTable:
Start End Slot Name Signature
static long nanoTime();
descriptor: ()J
flags: (0x0008) ACC_STATIC
Code:
stack=4, locals=0, args_size=0
0: invokestatic java.lang.System.nanoTime:()J
getstatic io.netty.util.concurrent.ScheduledFutureTask.START_TIME:J
lsub
lreturn
LocalVariableTable:
Start End Slot Name Signature
static long deadlineNanos(long);
descriptor: (J)J
flags: (0x0008) ACC_STATIC
Code:
stack=4, locals=2, args_size=1
start local 0 0: invokestatic io.netty.util.concurrent.ScheduledFutureTask.nanoTime:()J
lload 0
ladd
lreturn
end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 delay J
MethodParameters:
Name Flags
delay
void <init>(io.netty.util.concurrent.AbstractScheduledEventExecutor, java.lang.Runnable, V, );
descriptor: (Lio/netty/util/concurrent/AbstractScheduledEventExecutor;Ljava/lang/Runnable;Ljava/lang/Object;J)V
flags: (0x0000)
Code:
stack=5, locals=6, args_size=5
start local 0 start local 1 start local 2 start local 3 start local 4 0: aload 0
aload 1
aload 2
aload 3
invokestatic io.netty.util.concurrent.ScheduledFutureTask.toCallable:(Ljava/lang/Runnable;Ljava/lang/Object;)Ljava/util/concurrent/Callable;
lload 4
invokespecial io.netty.util.concurrent.ScheduledFutureTask.<init>:(Lio/netty/util/concurrent/AbstractScheduledEventExecutor;Ljava/util/concurrent/Callable;J)V
1: return
end local 4 end local 3 end local 2 end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 2 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 2 1 executor Lio/netty/util/concurrent/AbstractScheduledEventExecutor;
0 2 2 runnable Ljava/lang/Runnable;
0 2 3 result TV;
0 2 4 nanoTime J
Signature: (Lio/netty/util/concurrent/AbstractScheduledEventExecutor;Ljava/lang/Runnable;TV;J)V
MethodParameters:
Name Flags
executor
runnable
result
nanoTime
void <init>(io.netty.util.concurrent.AbstractScheduledEventExecutor, java.util.concurrent.Callable<V>, long, );
descriptor: (Lio/netty/util/concurrent/AbstractScheduledEventExecutor;Ljava/util/concurrent/Callable;JJ)V
flags: (0x0000)
Code:
stack=4, locals=7, args_size=5
start local 0 start local 1 start local 2 start local 3 start local 5 0: aload 0
aload 1
aload 2
invokespecial io.netty.util.concurrent.PromiseTask.<init>:(Lio/netty/util/concurrent/EventExecutor;Ljava/util/concurrent/Callable;)V
1: aload 0
getstatic io.netty.util.concurrent.ScheduledFutureTask.nextTaskId:Ljava/util/concurrent/atomic/AtomicLong;
invokevirtual java.util.concurrent.atomic.AtomicLong.getAndIncrement:()J
putfield io.netty.util.concurrent.ScheduledFutureTask.id:J
2: aload 0
iconst_m1
putfield io.netty.util.concurrent.ScheduledFutureTask.queueIndex:I
3: lload 5
lconst_0
lcmp
ifne 5
4: new java.lang.IllegalArgumentException
dup
ldc "period: 0 (expected: != 0)"
invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
athrow
5: StackMap locals: io.netty.util.concurrent.ScheduledFutureTask io.netty.util.concurrent.AbstractScheduledEventExecutor java.util.concurrent.Callable long long
StackMap stack:
aload 0
lload 3
putfield io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:J
6: aload 0
lload 5
putfield io.netty.util.concurrent.ScheduledFutureTask.periodNanos:J
7: return
end local 5 end local 3 end local 2 end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 8 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 8 1 executor Lio/netty/util/concurrent/AbstractScheduledEventExecutor;
0 8 2 callable Ljava/util/concurrent/Callable<TV;>;
0 8 3 nanoTime J
0 8 5 period J
Signature: (Lio/netty/util/concurrent/AbstractScheduledEventExecutor;Ljava/util/concurrent/Callable<TV;>;JJ)V
MethodParameters:
Name Flags
executor
callable
nanoTime
period
void <init>(io.netty.util.concurrent.AbstractScheduledEventExecutor, java.util.concurrent.Callable<V>, );
descriptor: (Lio/netty/util/concurrent/AbstractScheduledEventExecutor;Ljava/util/concurrent/Callable;J)V
flags: (0x0000)
Code:
stack=3, locals=5, args_size=4
start local 0 start local 1 start local 2 start local 3 0: aload 0
aload 1
aload 2
invokespecial io.netty.util.concurrent.PromiseTask.<init>:(Lio/netty/util/concurrent/EventExecutor;Ljava/util/concurrent/Callable;)V
1: aload 0
getstatic io.netty.util.concurrent.ScheduledFutureTask.nextTaskId:Ljava/util/concurrent/atomic/AtomicLong;
invokevirtual java.util.concurrent.atomic.AtomicLong.getAndIncrement:()J
putfield io.netty.util.concurrent.ScheduledFutureTask.id:J
2: aload 0
iconst_m1
putfield io.netty.util.concurrent.ScheduledFutureTask.queueIndex:I
3: aload 0
lload 3
putfield io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:J
4: aload 0
lconst_0
putfield io.netty.util.concurrent.ScheduledFutureTask.periodNanos:J
5: return
end local 3 end local 2 end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 6 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 6 1 executor Lio/netty/util/concurrent/AbstractScheduledEventExecutor;
0 6 2 callable Ljava/util/concurrent/Callable<TV;>;
0 6 3 nanoTime J
Signature: (Lio/netty/util/concurrent/AbstractScheduledEventExecutor;Ljava/util/concurrent/Callable<TV;>;J)V
MethodParameters:
Name Flags
executor
callable
nanoTime
protected io.netty.util.concurrent.EventExecutor executor();
descriptor: ()Lio/netty/util/concurrent/EventExecutor;
flags: (0x0004) ACC_PROTECTED
Code:
stack=1, locals=1, args_size=1
start local 0 0: aload 0
invokespecial io.netty.util.concurrent.PromiseTask.executor:()Lio/netty/util/concurrent/EventExecutor;
areturn
end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
public long deadlineNanos();
descriptor: ()J
flags: (0x0001) ACC_PUBLIC
Code:
stack=2, locals=1, args_size=1
start local 0 0: aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:J
lreturn
end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
public long delayNanos();
descriptor: ()J
flags: (0x0001) ACC_PUBLIC
Code:
stack=6, locals=1, args_size=1
start local 0 0: lconst_0
aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:()J
invokestatic io.netty.util.concurrent.ScheduledFutureTask.nanoTime:()J
lsub
invokestatic java.lang.Math.max:(JJ)J
lreturn
end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
public long delayNanos(long);
descriptor: (J)J
flags: (0x0001) ACC_PUBLIC
Code:
stack=8, locals=3, args_size=2
start local 0 start local 1 0: lconst_0
aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:()J
lload 1
getstatic io.netty.util.concurrent.ScheduledFutureTask.START_TIME:J
lsub
lsub
invokestatic java.lang.Math.max:(JJ)J
lreturn
end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 1 1 currentTimeNanos J
MethodParameters:
Name Flags
currentTimeNanos
public long getDelay(java.util.concurrent.TimeUnit);
descriptor: (Ljava/util/concurrent/TimeUnit;)J
flags: (0x0001) ACC_PUBLIC
Code:
stack=4, locals=2, args_size=2
start local 0 start local 1 0: aload 1
aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.delayNanos:()J
getstatic java.util.concurrent.TimeUnit.NANOSECONDS:Ljava/util/concurrent/TimeUnit;
invokevirtual java.util.concurrent.TimeUnit.convert:(JLjava/util/concurrent/TimeUnit;)J
lreturn
end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 1 1 unit Ljava/util/concurrent/TimeUnit;
MethodParameters:
Name Flags
unit
public int compareTo(java.util.concurrent.Delayed);
descriptor: (Ljava/util/concurrent/Delayed;)I
flags: (0x0001) ACC_PUBLIC
Code:
stack=4, locals=5, args_size=2
start local 0 start local 1 0: aload 0
aload 1
if_acmpne 2
1: iconst_0
ireturn
2: StackMap locals:
StackMap stack:
aload 1
checkcast io.netty.util.concurrent.ScheduledFutureTask
astore 2
start local 2 3: aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:()J
aload 2
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:()J
lsub
lstore 3
start local 3 4: lload 3
lconst_0
lcmp
ifge 6
5: iconst_m1
ireturn
6: StackMap locals: io.netty.util.concurrent.ScheduledFutureTask long
StackMap stack:
lload 3
lconst_0
lcmp
ifle 8
7: iconst_1
ireturn
8: StackMap locals:
StackMap stack:
aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.id:J
aload 2
getfield io.netty.util.concurrent.ScheduledFutureTask.id:J
lcmp
ifge 10
9: iconst_m1
ireturn
10: StackMap locals:
StackMap stack:
aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.id:J
aload 2
getfield io.netty.util.concurrent.ScheduledFutureTask.id:J
lcmp
ifne 12
11: new java.lang.Error
dup
invokespecial java.lang.Error.<init>:()V
athrow
12: StackMap locals:
StackMap stack:
iconst_1
ireturn
end local 3 end local 2 end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 13 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 13 1 o Ljava/util/concurrent/Delayed;
3 13 2 that Lio/netty/util/concurrent/ScheduledFutureTask<*>;
4 13 3 d J
MethodParameters:
Name Flags
o
public void run();
descriptor: ()V
flags: (0x0001) ACC_PUBLIC
Code:
stack=5, locals=4, args_size=1
start local 0 0: getstatic io.netty.util.concurrent.ScheduledFutureTask.$assertionsDisabled:Z
ifne 1
aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.executor:()Lio/netty/util/concurrent/EventExecutor;
invokeinterface io.netty.util.concurrent.EventExecutor.inEventLoop:()Z
ifne 1
new java.lang.AssertionError
dup
invokespecial java.lang.AssertionError.<init>:()V
athrow
1: StackMap locals:
StackMap stack:
aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.periodNanos:J
lconst_0
lcmp
ifne 6
2: aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.setUncancellableInternal:()Z
ifeq 22
3: aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.task:Ljava/util/concurrent/Callable;
invokeinterface java.util.concurrent.Callable.call:()Ljava/lang/Object;
astore 1
start local 1 4: aload 0
aload 1
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.setSuccessInternal:(Ljava/lang/Object;)Lio/netty/util/concurrent/Promise;
pop
end local 1 5: goto 22
6: StackMap locals:
StackMap stack:
aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.isCancelled:()Z
ifne 22
7: aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.task:Ljava/util/concurrent/Callable;
invokeinterface java.util.concurrent.Callable.call:()Ljava/lang/Object;
pop
8: aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.executor:()Lio/netty/util/concurrent/EventExecutor;
invokeinterface io.netty.util.concurrent.EventExecutor.isShutdown:()Z
ifne 22
9: aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.periodNanos:J
lstore 1
start local 1 10: lload 1
lconst_0
lcmp
ifle 13
11: aload 0
dup
getfield io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:J
lload 1
ladd
putfield io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:J
12: goto 14
13: StackMap locals: long
StackMap stack:
aload 0
invokestatic io.netty.util.concurrent.ScheduledFutureTask.nanoTime:()J
lload 1
lsub
putfield io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:J
14: StackMap locals:
StackMap stack:
aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.isCancelled:()Z
ifne 22
15: aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.executor:()Lio/netty/util/concurrent/EventExecutor;
checkcast io.netty.util.concurrent.AbstractScheduledEventExecutor
getfield io.netty.util.concurrent.AbstractScheduledEventExecutor.scheduledTaskQueue:Lio/netty/util/internal/PriorityQueue;
16: astore 3
start local 3 17: getstatic io.netty.util.concurrent.ScheduledFutureTask.$assertionsDisabled:Z
ifne 18
aload 3
ifnonnull 18
new java.lang.AssertionError
dup
invokespecial java.lang.AssertionError.<init>:()V
athrow
18: StackMap locals: java.util.Queue
StackMap stack:
aload 3
aload 0
invokeinterface java.util.Queue.add:(Ljava/lang/Object;)Z
pop
end local 3 end local 1 19: goto 22
StackMap locals: io.netty.util.concurrent.ScheduledFutureTask
StackMap stack: java.lang.Throwable
20: astore 1
start local 1 21: aload 0
aload 1
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.setFailureInternal:(Ljava/lang/Throwable;)Lio/netty/util/concurrent/Promise;
pop
end local 1 22: StackMap locals:
StackMap stack:
return
end local 0 LocalVariableTable:
Start End Slot Name Signature
0 23 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
4 5 1 result TV;
10 19 1 p J
17 19 3 scheduledTaskQueue Ljava/util/Queue<Lio/netty/util/concurrent/ScheduledFutureTask<*>;>;
21 22 1 cause Ljava/lang/Throwable;
Exception table:
from to target type
1 19 20 Class java.lang.Throwable
public boolean cancel(boolean);
descriptor: (Z)Z
flags: (0x0001) ACC_PUBLIC
Code:
stack=2, locals=3, args_size=2
start local 0 start local 1 0: aload 0
iload 1
invokespecial io.netty.util.concurrent.PromiseTask.cancel:(Z)Z
istore 2
start local 2 1: iload 2
ifeq 3
2: aload 0
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.executor:()Lio/netty/util/concurrent/EventExecutor;
checkcast io.netty.util.concurrent.AbstractScheduledEventExecutor
aload 0
invokevirtual io.netty.util.concurrent.AbstractScheduledEventExecutor.removeScheduled:(Lio/netty/util/concurrent/ScheduledFutureTask;)V
3: StackMap locals: int
StackMap stack:
iload 2
ireturn
end local 2 end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 4 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 4 1 mayInterruptIfRunning Z
1 4 2 canceled Z
MethodParameters:
Name Flags
mayInterruptIfRunning
boolean cancelWithoutRemove(boolean);
descriptor: (Z)Z
flags: (0x0000)
Code:
stack=2, locals=2, args_size=2
start local 0 start local 1 0: aload 0
iload 1
invokespecial io.netty.util.concurrent.PromiseTask.cancel:(Z)Z
ireturn
end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 1 1 mayInterruptIfRunning Z
MethodParameters:
Name Flags
mayInterruptIfRunning
protected java.lang.StringBuilder toStringBuilder();
descriptor: ()Ljava/lang/StringBuilder;
flags: (0x0004) ACC_PROTECTED
Code:
stack=3, locals=2, args_size=1
start local 0 0: aload 0
invokespecial io.netty.util.concurrent.PromiseTask.toStringBuilder:()Ljava/lang/StringBuilder;
astore 1
start local 1 1: aload 1
aload 1
invokevirtual java.lang.StringBuilder.length:()I
iconst_1
isub
bipush 44
invokevirtual java.lang.StringBuilder.setCharAt:(IC)V
2: aload 1
ldc " id: "
invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
3: aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.id:J
invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
4: ldc ", deadline: "
invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
5: aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.deadlineNanos:J
invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
6: ldc ", period: "
invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
7: aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.periodNanos:J
invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
8: bipush 41
invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
9: areturn
end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 10 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
1 10 1 buf Ljava/lang/StringBuilder;
public int priorityQueueIndex(io.netty.util.internal.DefaultPriorityQueue<?>);
descriptor: (Lio/netty/util/internal/DefaultPriorityQueue;)I
flags: (0x0001) ACC_PUBLIC
Code:
stack=1, locals=2, args_size=2
start local 0 start local 1 0: aload 0
getfield io.netty.util.concurrent.ScheduledFutureTask.queueIndex:I
ireturn
end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 1 1 queue Lio/netty/util/internal/DefaultPriorityQueue<*>;
Signature: (Lio/netty/util/internal/DefaultPriorityQueue<*>;)I
MethodParameters:
Name Flags
queue
public void priorityQueueIndex(io.netty.util.internal.DefaultPriorityQueue<?>, );
descriptor: (Lio/netty/util/internal/DefaultPriorityQueue;I)V
flags: (0x0001) ACC_PUBLIC
Code:
stack=2, locals=3, args_size=3
start local 0 start local 1 start local 2 0: aload 0
iload 2
putfield io.netty.util.concurrent.ScheduledFutureTask.queueIndex:I
1: return
end local 2 end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 2 0 this Lio/netty/util/concurrent/ScheduledFutureTask<TV;>;
0 2 1 queue Lio/netty/util/internal/DefaultPriorityQueue<*>;
0 2 2 i I
Signature: (Lio/netty/util/internal/DefaultPriorityQueue<*>;I)V
MethodParameters:
Name Flags
queue
i
public int compareTo(java.lang.Object);
descriptor: (Ljava/lang/Object;)I
flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
Code:
stack=2, locals=2, args_size=2
0: aload 0
aload 1
checkcast java.util.concurrent.Delayed
invokevirtual io.netty.util.concurrent.ScheduledFutureTask.compareTo:(Ljava/util/concurrent/Delayed;)I
ireturn
LocalVariableTable:
Start End Slot Name Signature
}
Signature: <V:Ljava/lang/Object;>Lio/netty/util/concurrent/PromiseTask<TV;>;Lio/netty/util/concurrent/ScheduledFuture<TV;>;Lio/netty/util/internal/PriorityQueueNode;
SourceFile: "ScheduledFutureTask.java"