现在byteArray已经包含了从ByteBuf中读取的数据,可以对其进行进一步处理或返回。 java System.out.println(Arrays.toString(byteArray)); 完整的示例代码如下: java import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import java.util.Arrays; public class ByteBufToByteArrayExample { public st...
private boolean retryRelease0(T instance, int decrement) { for (;;) { // 采用 Volatile 的方式读取 refCnt int rawCnt = updater().get(instance), // 获取逻辑引用计数,如果 refCnt 已经变为奇数,则抛出异常 realCnt = toLiveRealRefCnt(rawCnt, decrement); // 如果执行完本次 release , 逻辑引用...
= null) { long newUsedMemory = DIRECT_MEMORY_COUNTER.addAndGet(capacity); if (newUsedMemory > DIRECT_MEMORY_LIMIT) { DIRECT_MEMORY_COUNTER.addAndGet(-capacity); throw new OutOfDirectMemoryError("failed to allocate " + capacity + " byte(s) of direct memory (used: " + (newUsedMemory ...
为此,我使用以下MessageTomessageDecoder: class ByteArrayDecoder extends MessageToMessageDecoder<ByteBuf> { @Override protected void decode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws Exception { int length = msg.readableBytes(); if (msg.hasArray()) { out.add(new MyBuffer(...
Converting Java Byte Array to ByteBuf To convert a Java byte array to aByteBuf, we can use theUnpooled.wrappedBuffer()method provided by Netty. This method creates aByteBufthat wraps the given byte array, allowing us to read and write data to it. ...
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默认的分配器 ByteBufAllocator.DEFAULT ,可以通过 Java 系统参数(SystemProperty )选项 io.netty.allocator.type 去配置,使用字符串值:“unpooled”,“pooled”。 关于这一段,Netty的源代码截取如下: String allocType = SystemPropertyUtil.get("io.netty.allocator.type", "unpooled").toLowerCase(Locale.US...
ByteBuf缓冲区 Netty版本:netty-all-4.1.30.Final Netty提供了ByteBuf缓冲区组件来替代Java NIO的ByteBuffer缓冲区组件(即Netty的数据读写是以ByteBuf为单位进行交互的),以便更加快捷和高效的操作内存缓冲区; ByteBuf的优势
// Adjust to the new capacity. capacity(newCapacity); //四、内存分配 } 比较 先对要写入的字节数minWritableBytes进行判断:如果minWritableBytes < capacity - writeIndex,那么很好,不需要扩容;如果minWritableBytes > maxCapacity - writerIndex,也就是要写入字节数超过了允许的最大字节数,直接抛出越界异常Index...
{ //命中缓存,was able to allocate out of the cache so move on return; } tableIdx = tinyIdx(normCapacity); table = tinySubpagePools; } else { //2.进行缓存分配 if (cache.allocateSmall(this, buf, reqCapacity, normCapacity)) { //命中缓存,was able to allocate out of the cache so ...