Fast-cast高性能的低延迟可靠多播消息
基于主题的高性能、可靠无代理 UDP 消息传递(“事件总线”)。可承受每秒高达 700 万个 70 字节的消息。
实现 NAK 协议所需的缓冲区不受影响,因此对 GC 的影响不大。如果配置得当,能保证可靠、有边界的低延迟。
要求 JDK 1.7 或更高版本
示例代码
基于快速序列化的对象组播(=广播)发布者:
public static void main(String arg[]) { FastCast.getFastCast().setNodeId("PUB"); // 5 chars MAX !! configureFastCast(); FCPublisher pub = FastCast.getFastCast().onTransport("default").publish( new PublisherConf(1) // unique-per-transport topic id .numPacketHistory(40_000) // nuber of packets kept for retransmission requests .pps(5000) // packets per second rate limit. So max traffic for topic = 5000*2500 = 12.5 MB/second ); // use a helper for fast-serialized messages ObjectPublisher opub = new ObjectPublisher(pub); RateMeasure measure = new RateMeasure("msg/s"); while( true ) { measure.count(); opub.sendObject( null, // all listeners should receive (by specifying a nodeId, a specific subscriber can be targeted) "Hello "+System.currentTimeMillis(), // serializable object false // allow for 'batching' several messages into one (will create slight latency) ); } }
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