Java thread Synchronization

Business logic:

A large community, every second there are thousands of people in the submission of messages, submitted by the message will pass, tens of thousands of regular expression filtering, no match any rules, to save to the system, otherwise prompt users, you enter the content is not legal.

This is what I think, to divide the tens of thousands of regular expressions into 2000 groups, open a thread pool of 5 threads, and each thread will be responsible for matching the 2000 rules.

When each message is submitted, it will be 5 threads to determine if there is a matching rule, and if one of the threads matches the rule, it will end the task of the other 4 threads and return the results to the user.

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Code:

Import Java.util.arraylist;import Java.util.concurrent.countdownlatch;public class Testthread {/** * @param args * @ Throws interruptedexception */public static void Main (string[] args) throws interruptedexception {String c = "Comment 1"; Txtclass tx = new Txtclass (c);        Countdownlatch Cdlatch = new Countdownlatch (5);        Thread tr = new Crthread (1,tx,cdlatch),//1 indicates the first Thread TR2 = new Crthread (2,tx,cdlatch);        Thread TR3 = new Crthread (3,tx,cdlatch);        Thread TR4 = new Crthread (4,tx,cdlatch);                Thread TR5 = new Crthread (5,tx,cdlatch);        Tr.start ();        Tr2.start ();        Tr3.start ();        Tr4.start ();        Tr5.start ();        Cdlatch.await (); System.out.println ("All done, results [" +tx.isfind () + "]");}} Class Txtclass{private string c = "";p rivate boolean isfind = False;public txtclass (string c) {this.c = C;} public Boolean isfind () {return isfind;} public void Setfind (Boolean isfind) {this.isfind = Isfind;} Public String GetC () {return c;}} Class regclass{Validation rules private static Regclass rc = new Regclass ();p ublic static Regclass getinstance () {return rc;} Private arraylist<string> list = new ArrayList ();p ublic Regclass () {//Initialization rule list.add ("S"); List.add ("s"); List.add ("S"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); List.add ("s"); ), List.add ("s"), List.add ("s"), List.add ("1"), List.add ("comment"), List.add ("a"), List.add ("B"); List.add ("R");} public boolean iscontains (int index,string c) {if (List.size () >index) {return C.indexof (List.get (index)) >=0;} Else{return false;}}} Class Crthread extends thread{private int startnum = 0;private txtclass txtclass;//message content private Countdownlatch CDLATCH;PRI vate int onelength = 2000;//The length of a thread checksum public crthread (int i,txtclass txtclass,countdownlatch cdlatch) {super (); This.startnum = I;this.txtclass = Txtclass;this.cdlatch = Cdlatch;} @Overridepublic void Run () {Boolean f = fAlse;int nums = 0;for (int i=0;i<onelength;i++) {nums = (startNum-1) *onelength+i; System.out.println ("thread-" +startnum+ "-[" +nums+ "]") f=regclass.getinstance (). Iscontains (Nums, txtclass.getc ()) ; if (f) {txtclass.setfind (true);} if (Txtclass.isfind ()) {break;} try {thread.sleep (1);} catch (Interruptedexception e) {e.printstacktrace ()}} System.out.println ("thread-" +startnum+ "-End [" +nums+ "]"); This.cdLatch.countDown ();}}

Java thread Synchronization