Use ThreadLocal to troubleshoot data sharing across multiple threads

private static threadlocal<string> UuID = new Threadlocal<string> () {

Protected synchronized String InitialValue () {

return null;

}

};

public static String Getnextuuid () {

try {

if (uuid.get () = null)

return Uuid.get ();

Uuid.set (Uuidutil.replacestring (Uuidutil.getuuid (), "-", '-'));

return Uuid.get ();

} catch (Exception e) {

E.printstacktrace ();

}

return null;

}

Test thread

Package com.ushi.montor.test;

Import Com.ushi.montor.util.UUIDUtil;

public class TestClient extends Thread {

public void Run () {

for (int i = 0; i < 3; i++) {

System.out.println ("thread[" + thread.currentthread (). GetName () + "] sn[" + uuidutil.getnextuuid () + "]");

}

}

}

Test class

Package com.ushi.montor.test;

public class Testthreadlocal {

public static void Main (string[] args) {

3 threads share sn, each generating serial number

testclient T1 = new TestClient ();

TestClient t2 = new TestClient ();

testclient t3 = new TestClient ();

T1.start ();

T2.start ();

T3.start ();

}

}

Execution results

THREAD[THREAD-1] sn[6c9324d1b7774e2891179c57294b5e52]

THREAD[THREAD-1] sn[6c9324d1b7774e2891179c57294b5e52]

THREAD[THREAD-1] sn[6c9324d1b7774e2891179c57294b5e52]

THREAD[THREAD-0] sn[402526757d824d0988572b706dea7334]

THREAD[THREAD-0] sn[402526757d824d0988572b706dea7334]

THREAD[THREAD-0] sn[402526757d824d0988572b706dea7334]

Thread[thread-2] sn[1b10c4b83a43401da369c823cd1f7c2d]

Thread[thread-2] sn[1b10c4b83a43401da369c823cd1f7c2d]

Thread[thread-2] sn[1b10c4b83a43401da369c823cd1f7c2d]

Use ThreadLocal to troubleshoot data sharing across multiple threads