Java Build serial number (1)

Assume that a single database source is the case.

Lock data through the Select for update.

Test the program.

Package javay.test;

Class Testgetter extends Thread {

private int id;

public Testgetter (int n) {

id = n;

}

/* *

* @see Java.lang.thread#run ()

*/

@Override

public void Run () {

String[] keys = {

"Key11",

"Key12",

"KEY13"

};

Long sn =-2;

try {

SN = jserialnumber.updateserialnumber (keys);

} catch (Exception e) {

E.printstacktrace ();

}

System.out.println ("Thread" + ID + ": sn=" + sn);

}

}

public class Testjn {

public static void Main (string[] args) throws Exception {

String[] keys = {

"Key11",

"Key12",

"KEY13"

//        };

Long SN = jserialnumber.createserialnumber (keys, Jserialnumber.min_value, 1L, Jserialnumber.max_value);

Long SN = jserialnumber.updateserialnumber (keys);

System.out.println ("testjn:sn=" + sn);

testgetter[] GS = new TESTGETTER[100];

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

Gs[i] = new Testgetter (i);

}

for (Testgetter G:gs) {

G.start ();

}

}

}

Next time plan to test performance and use synchronized to implement.

Java Build serial number (1)