本篇内容介绍了“netty channelPool连接池怎么使用”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
如果流数据推送【持续不断的数据 向服务端进行推送 没有必要使用channelPool。也没有必要释放channel】
核心接口:ChannelPool
public ChannelPool newPool(Bootstrap bootstrap) { return new FixedChannelPool(bootstrap, iridiumClientChannelHandler, protocolOptions.getMaxConnections()); }}
核心实现类:
public class FixedChannelPool extends SimpleChannelPool
一个抽象类
public abstract class AbstractChannelPoolHandler implements ChannelPoolHandler { @Override public void channelAcquired(@SuppressWarnings("unused") Channel ch) throws Exception { // NOOP } @Override public void channelReleased(@SuppressWarnings("unused") Channel ch) throws Exception { // NOOP }}
Channel.close() 不是断开连接 是 从eventLoop 移除 注销
关于channelPool 健康检查:仅仅是获取连接前
ChannelHealthChecker 这个类可以判定连接池中的chanel 是否有效
public interface ChannelPoolHandler { /** * Called once a {@link Channel} was released by calling {@link ChannelPool#release(Channel)} or * {@link ChannelPool#release(Channel, Promise)}. * * This method will be called by the {@link EventLoop} of the {@link Channel}. */ void channelReleased(Channel ch) throws Exception; /** * Called once a {@link Channel} was acquired by calling {@link ChannelPool#acquire()} or * {@link ChannelPool#acquire(Promise)}. * * This method will be called by the {@link EventLoop} of the {@link Channel}. */ void channelAcquired(Channel ch) throws Exception; /** * Called once a new {@link Channel} is created in the {@link ChannelPool}. * * This method will be called by the {@link EventLoop} of the {@link Channel}. */ void channelCreated(Channel ch) throws Exception;}
/* 当链接创建的时候添加channelhandler,只有当channel不足时会创建,但不会超过限制的最大channel数*/
@Override protected void initChannel(Channel ch) throws Exception { channelPoolHandler.channelCreated(ch); }}
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原文链接:https://my.oschina.net/u/3527075/blog/4910962