Reference
tryHandlePending(boolean waitForNotify)
Unsafe
allocateMemory(long var )；freeMemory(long var1)
Runnable
run()
客户端
1.发送客户端ssl版本，支持的加密算，客户端随机数法
Deallocator
private long address;private long size;private int capacity;
Bits
System
gc()
ByteBuffer
allocateDirect(int cap)
DirectByteBuffer
private static class Deallocator
DirectByteBuffer(int cap)
PhantomReference
服务端
Cleaner
private static final ReferenceQueue dummyQueue = new ReferenceQueue();private final Runnable thunk;
Thread
ReferenceHandler
触发
