《《Scalable_IO_in_Java》.pdf

u d Scalable IO in Java e . o g e w s o . s c . e e g Doug Lea / / State University of New York at Oswego : p t dl@ t h http :// Outline Scalable network services u d e . o g Event-driven processing e w s o . s Reactor pattern c . e asic version e g / Multithreaded versions / : p Other variants t t h Walkthrough of java.nio nonblocking IO APIs Network Services Web services, Distributed Objects, etc u d e. Most have same basic structure: o g Read request e w s Decode request o . s Process service c . e Encode reply e g / Send reply / : p ut differ in nature and cost of each step t t h XML parsing, File transfer, Web page generation, computational services, ... Classic Service Designs u d e . o read decode compute encode send g client e handler w s read decode compute encode send o . client Server handler s c . e read decode compute encode send e client handler g / / : p t t h Each handler may be started in its own thread Classic ServerSocket oop class Server implements Runnable { public void run() { try { u ServerSocket ss = new ServerSocket(PORT); d e while (!Terrupted()) .