内存优化,减轻GC压力

src/org/kne/cloud/network/srv6/KLALBRoutingProtocol.java

@@ -9,6 +9,7 @@ import java.net.Inet6Address;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import java.net.SocketException;
+import java.nio.ByteBuffer;
 import java.nio.channels.Channels;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -35,6 +36,7 @@ import org.kne.cloud.network.monitor.MonitorData;
 import org.kne.cloud.network.monitor.SpeedAndTrafficAndDelayMonitorDataImpl;
 import org.kne.cloud.network.monitor.SpeedAndTrafficMonitorData;
 import org.kne.cloud.network.monitor.SpeedAndTrafficMonitorDataImpl;
+import org.kne.io.KNEChannels;
 import org.kne.membandboost.MembandBoost;
 
 public class KLALBRoutingProtocol extends Thread{
@@ -211,20 +213,15 @@ public class KLALBRoutingProtocol extends Thread{
 		while(true) {
 
 			try {
-			byte[]ca=MembandBoost.allocateUninitializedByteArray(65535);
-			DatagramPacket dgp=new DatagramPacket(ca, ca.length);
-			ds.receive(dgp);
-			//System.out.println(Arrays.toString( Arrays.copyOf( dgp.getData(),dgp.getLength())));
-			ByteArrayInputStream bi=new ByteArrayInputStream(dgp.getData(),0,dgp.getLength());
-			KLALBRoutingProtocolPacket kp=KLALBRoutingProtocolPacket.readKLALBPacketFromChannel(Channels.newChannel(bi));
+			KLALBRoutingProtocolPacket kp=receivePacket();
 			
 			switch(kp.getType()) {
 			case KLALBRoutingProtocolPacket.RINFO_REQ:
 				RouterInfo rifr=netmap.get(router.getLocator().getAddress());
 				if(debug)
-				System.out.println("get Request from:"+dgp.getSocketAddress());
+				System.out.println("get Request from:"+kp.getFrom());
 				if(rifr!=null) {
-				writePacket( new RouterInfoPacket( rifr,false,-1), dgp.getSocketAddress());
+				writePacket( new RouterInfoPacket( rifr,false,-1), kp.getFrom());
 				if(debug)
 				System.out.println("response router info:"+rifr);
 				}else {
@@ -246,7 +243,7 @@ public class KLALBRoutingProtocol extends Thread{
 				netmap.put(rif.getLocator().getAddress(), rif);
 				noticeUpdate();
 				if(rifp.isFlood()) {
-					floodPacket( dgp.getSocketAddress(), rifp);
+					floodPacket( kp.getFrom(), rifp);
 				
 				}
 				
@@ -259,7 +256,7 @@ public class KLALBRoutingProtocol extends Thread{
 				break;
 			case KLALBRoutingProtocolPacket.JSON_DATA:
 				JsonDataPacket data=(JsonDataPacket) kp;
-				receivers.forEach((v)->{v.accept(dgp.getSocketAddress(),data);});
+				receivers.forEach((v)->{v.accept(kp.getFrom(),data);});
 				break;
 			default:
 				break;
@@ -276,7 +273,32 @@ public class KLALBRoutingProtocol extends Thread{
 			}
 	}
 	}
-	
+	private static final ThreadLocal<ByteBuffer> LSDB_RX_BUFFER =
+			ThreadLocal.withInitial(() -> ByteBuffer.allocate(65535));
+
+	private KLALBRoutingProtocolPacket receivePacket() throws IOException {
+		// 2. 获取并重置缓冲区
+		ByteBuffer bbf = LSDB_RX_BUFFER.get();
+		bbf.clear();
+
+		// 3. 构造 DatagramPacket（注意这里要传底层 array 和 capacity）
+		DatagramPacket dgp = new DatagramPacket(bbf.array(), bbf.capacity());
+
+		// 4. 阻塞接收
+		ds.receive(dgp);
+
+		// 5. 限制缓冲区范围到实际收到的长度
+		bbf.limit(dgp.getLength());
+		bbf.position(0);
+
+		// 6. 直接用 KNEChannels 包装 ByteBuffer，避免 ByteArrayInputStream
+		KLALBRoutingProtocolPacket kp = KLALBRoutingProtocolPacket.readKLALBPacketFromChannel(
+				KNEChannels.newReadableChannel(bbf)
+		);
+		if(kp!=null)
+			kp.setFrom(dgp.getSocketAddress());
+		return kp;
+	}
 	private void floodPacket(SocketAddress except,RouterInfoPacket rifp) throws IOException {
 		long asn=rifp.getASN();
 		List<Neighbor>ln= router.getNeighbors();
@@ -304,20 +326,34 @@ public class KLALBRoutingProtocol extends Thread{
 	public void sendJsonPacketToAddress(JsonDataPacket pkt,SocketAddress dest) throws IOException {
 		writePacket(pkt,dest);
 	}
-	
-	private void writePacket(KLALBRoutingProtocolPacket pkt,SocketAddress dest) throws IOException {
-		ByteArrayOutputStream bos=new ByteArrayOutputStream(65535);
-		KLALBRoutingProtocolPacket.writeKLALBPacketToChannel(Channels.newChannel(bos),pkt);
-		byte[]to=bos.toByteArray();
-		DatagramPacket dgpx=new DatagramPacket(to,to.length);
+	// 1. 在类成员变量处定义一个 64KB 的 ThreadLocal 缓冲区
+// 注意：这里依然使用 65535，因为你说 LSDB 同步可能需要这么大
+	private static final ThreadLocal<ByteBuffer> LSDB_TX_BUFFER =
+			ThreadLocal.withInitial(() -> ByteBuffer.allocate(65535));
+
+	private void writePacket(KLALBRoutingProtocolPacket pkt, SocketAddress dest) throws IOException {
+		// 2. 从 ThreadLocal 获取，并清空状态
+		ByteBuffer bbf = LSDB_TX_BUFFER.get();
+		bbf.clear();
+
+		// 3. 使用 KNEChannels 绑定到 ByteBuffer，直接写入
+		// 这避免了 ByteArrayOutputStream 内部的动态扩容和拷贝
+		KLALBRoutingProtocolPacket.writeKLALBPacketToChannel(KNEChannels.newWritableChannel(bbf), pkt);
+
+		// 4. 翻转，准备读取数据
+		bbf.flip();
+
+		// 5. 直接拿底层的 byte[] 和真实的 limit 发送
+		DatagramPacket dgpx = new DatagramPacket(bbf.array(), bbf.limit());
 		dgpx.setSocketAddress(dest);
+
 		sendLock.lock();
 		try {
-		ds.send(dgpx);
-		}catch(BindException e) {
+			ds.send(dgpx);
+		} catch (BindException e) {
 			e.printStackTrace();
-			System.err.println("Cannot assign:"+dest);
-		}finally {
+			System.err.println("Cannot assign:" + dest);
+		} finally {
 			sendLock.unlock();
 		}
 	}