Redis Learning Note (7)-Transactions

Package Cn.com;import Java.util.list;import Redis.clients.jedis.jedis;import redis.clients.jedis.Transaction; public class Redis_transactions {public static Jedis Redis = new Jedis ("localhost", 6379);//Connection redis/** * Basic Transaction Usage * Default to User 1,user2 are initialized to 1000 * Open transaction * to User:1:money plus one * to User:2:money minus one * execution transaction * */public static void Base_trans () throws Interrupte    DEXCEPTION{REDIS.FLUSHDB ();//Clear Data Redis.set ("Money", "$"), Redis.set ("Money1", "1000");        Long start = System.currenttimemillis ();     Transaction tx = Redis.multi ();     TX.INCR ("Money"),//to the user user:1 add a dollar tx.decr ("Money1"),//to the user user:1 minus a piece of money list<object> results = tx.exec ();     Long end = System.currenttimemillis ();        System.out.println ("Transaction SET:" + ((End-start)/1000.0) + "seconds");    System.out.println (Redis.get ("money"));    System.out.println (Redis.get ("Money1")); Redis.disconnect (); }/** * User transactions * Default to User1,user2 are initialized to 1000 * Open transaction * to User:1:money plus a * to User:2:money minus one * We user:2:money value is a is unable to perform the operation minus 1 Is that still going to work? * Because Redis transactions are relatively simple, such as the following problem requires the developer to control, Redis transaction is not control * */public static void User_trans () throws Interruptedexcept    ION{REDIS.FLUSHDB ();//Clear Data Redis.set ("User:1:money", "n"), Redis.set ("User:2:money", "a");     Long start = System.currenttimemillis ();          Transaction tx = Redis.multi (); TX.INCR ("User:1:money"),//to the user user:1 add a piece of money TX.DECR ("User:2:money");//to the user user:1 minus a piece of money list<object> results = TX     . exec ();     Long end = System.currenttimemillis ();         System.out.println ("Transaction SET:" + ((End-start)/1000.0) + "seconds");    System.out.println (Redis.get ("User:1:money"));    System.out.println (Redis.get ("User:2:money")); Redis.disconnect ();  }/** * The process of executing a transaction other clients change the key value, resolve the data consistency problem * through watch key monitoring to implement other client modification data, transaction cancellation * Usage first use watch to start the monitoring of key in the open transaction, the order must first monitor in the execution of the transaction * */public static void Changedata_trans () throws Interruptedexception{redis.flushdb ();//Clear Data Redis.set ("User:1:money",    "Redis.set"); ("User:2:money", "1000"); Long start = System.currenttiMemillis ();    Redis.watch ("User:1:money");     Transaction tx = Redis.multi (); TX.INCR ("User:1:money"),//to the user user:1 add a piece of money TX.DECR ("User:2:money"),//to the user user:1 minus a piece of money changedata ();//Change the data method list<        object> results = tx.exec ();     Long end = System.currenttimemillis ();         System.out.println ("Transaction SET:" + ((End-start)/1000.0) + "seconds");    System.out.println (Redis.get ("User:1:money"));    System.out.println (Redis.get ("User:2:money")); Redis.disconnect ();  }/** * Impersonate a new client to modify the element corresponding to the key monitored in the transaction * * **/public static void Changedata () {Jedis redis2 = new Jedis ("localhost", 6379);//  Connect Redis redis2.set ("User:1:money", "8888"); public static void Main (String [] args) throws Interruptedexception{changedata_trans ();}}

　　

Redis Learning Note (7)-Transactions