udp优化

src/main/java/org/redkale/net/AsyncNioUdpConnection.java

@@ -129,6 +129,11 @@ class AsyncNioUdpConnection extends AsyncNioConnection {
             }
             int start = dst.position();
             dst.put(buf);
+            if (buf.hasRemaining()) {
+                revbufferQueue.offerFirst(buf);
+            } else {
+                udpServerChannel.unsafeBufferPool.accept(buf);
+            }
             return dst.position() - start;
         }
     }
@@ -178,7 +183,9 @@ class AsyncNioUdpConnection extends AsyncNioConnection {
     public final void close() throws IOException {
         super.close();
         if (clientMode) {
-            channel.close(); //不能关闭channel
+            channel.close();
+        } else if (remoteAddress != null) {
+            udpServerChannel.connections.remove(remoteAddress);
         }
         if (this.connectKey != null) {
             this.connectKey.cancel();

src/main/java/org/redkale/net/AsyncNioUdpProtocolServer.java

@@ -120,6 +120,7 @@ class AsyncNioUdpProtocolServer extends ProtocolServer {
 
             @Override
             public void run() {
+                udpServerChannel.unsafeBufferPool = ObjectPool.createUnsafePool(Thread.currentThread(), 512, safeBufferPool);
                 final AsyncIOThread[] ioReadThreads = ioGroup.ioReadThreads;
                 final AsyncIOThread[] ioWriteThreads = ioGroup.ioWriteThreads;
                 final int reads = ioReadThreads.length;
@@ -129,7 +130,7 @@ class AsyncNioUdpProtocolServer extends ProtocolServer {
                 Set<SelectionKey> keys = null;
                 final Selector sel = selector;
                 final DatagramChannel serverChannel = udpServerChannel.serverChannel;
-                ObjectPool<ByteBuffer> unsafeBufferPool = ObjectPool.createUnsafePool(null, 512, safeBufferPool);
+                final ObjectPool<ByteBuffer> unsafeBufferPool = udpServerChannel.unsafeBufferPool;
                 while (!closed) {
                     try {
                         int count = sel.select();
@@ -237,6 +238,8 @@ class AsyncNioUdpProtocolServer extends ProtocolServer {
 
         DatagramChannel serverChannel;
 
+        ObjectPool<ByteBuffer> unsafeBufferPool;
+
         ConcurrentHashMap<SocketAddress, AsyncNioUdpConnection> connections = new ConcurrentHashMap<>();
 
         public AsyncNioUdpServerChannel(DatagramChannel serverChannel) {