Redis Implement distributed lock __java

Original address: http://blog.csdn.net/java2000_wl/article/details/8740911

Reference Address:

Http://www.cnblogs.com/dolphin0520/p/3923167.html

http://phl.iteye.com/blog/2029944

/** * @author HTTP://BLOG.CSDN.NET/JAVA2000_WL * @version <b>1.0.0</b> * * public class Redisbilllockhandler Implements Ibatchbilllockhandler {private static final Logger Logger = Loggerfactory.getlogger (redisbilllockhandler.cl

	ASS);
	
	private static final int default_single_expire_time = 3;

	private static final int default_batch_expire_time = 6;
	
	Private final Jedispool Jedispool; /** * Construction * @author HTTP://BLOG.CSDN.NET/JAVA2000_WL/Public Redisbilllockhandler (Jedispool jedispool) {this.je
	Dispool = Jedispool; /** * Acquire a lock returns true if the lock is available immediately, or FALSE * @author HTTP://BLOG.CSDN.NET/JAVA2000_WL * @param billidentify * @re
	Turn * * Public boolean Trylock (Ibillidentify billidentify) {return Trylock (billidentify, 0L, NULL);  /** * Lock is idle for a given wait time, the fetch lock succeeds returns TRUE, otherwise it returns false * @author HTTP://BLOG.CSDN.NET/JAVA2000_WL * @param billidentify * @param timeout * @param unit * @return/public boolean trylock (Ibillidentify billidentiFY, long timeout, timeunit unit) {string key = (String) billidentify.uniqueidentify ();
		Jedis Jedis = null;
			try {Jedis = GetResource ();
			Long nano = System.nanotime ();
				do {logger.debug ("Try Lock key:" + key);
				Long i = jedis.setnx (key, key);
					if (i = = 1) {Jedis.expire (key, Default_single_expire_time);
					Logger.debug ("Get Lock, Key:" + key + ", expire in" + Default_single_expire_time + "seconds.");
				return boolean.true;
						else {//exists lock if (logger.isdebugenabled ()) {String desc = jedis.get (key);
					Logger.debug ("key:" + key + "locked by another business:" + desc);
				} if (timeout = = 0) {break;
			} thread.sleep (300);
			while ((System.nanotime ()-Nano) < Unit.tonanos (timeout));
		return boolean.false;
			catch (jedisconnectionexception je) {logger.error (Je.getmessage (), je);
		Returnbrokenresource (Jedis);
		catch (Exception e) {logger.error (E.getmessage (), E); finally {RETUrnresource (Jedis);
	return boolean.false; /** * If lock idle immediately returns get failed wait * @author HTTP://BLOG.CSDN.NET/JAVA2000_WL * @param billidentify/public void L
		Ock (ibillidentify billidentify) {string key = (string) billidentify.uniqueidentify ();
		Jedis Jedis = null;
			try {Jedis = GetResource ();
				do {logger.debug ("Lock key:" + key);
				Long i = jedis.setnx (key, key);
					if (i = = 1) {Jedis.expire (key, Default_single_expire_time);
					Logger.debug ("Get Lock, Key:" + key + ", expire in" + Default_single_expire_time + "seconds.");
				Return
						else {if (logger.isdebugenabled ()) {String desc = jedis.get (key);
					Logger.debug ("key:" + key + "locked by another business:" + desc); 
			} thread.sleep (300);
		} while (true);
			catch (jedisconnectionexception je) {logger.error (Je.getmessage (), je);
		Returnbrokenresource (Jedis);
		catch (Exception e) {logger.error (E.getmessage (), E); finally {returnResource (Jedis); }/** * Release lock * @author HTTP://BLOG.CSDN.NET/JAVA2000_WL * @param billidentify * * public void UnLock (Ibilliden
		Tify billidentify) {list<ibillidentify> List = new arraylist<ibillidentify> ();
		List.add (billidentify);
	UnLock (list); /** * Bulk Fetch lock If all gets immediately returns true, partial fetch failure returns FALSE * @author Http://blog.csdn.net/java2000_wl * @date 2013-7-22 pm 10
		: 27:44 * @param billidentifylist * @return/public boolean trylock (list<ibillidentify> billidentifylist) {
	Return Trylock (billidentifylist, 0L, NULL); /** * Lock is idle for a given wait time, the fetch lock succeeds returns TRUE, otherwise it returns false * @author HTTP://BLOG.CSDN.NET/JAVA2000_WL * @param billidentifylis T * @param timeout * @param unit * @return/public boolean trylock (List<ibillidentify> billidentifylist,
		Long timeout, timeunit unit) {Jedis Jedis = null;	
			try {list<string> needlocking = new copyonwritearraylist<string> (); list<string> locked = new CopyonwriteaRraylist<string> ();
			Jedis = GetResource ();
			Long nano = System.nanotime ();
				Do {//build Pipeline, Batch submit Pipeline Pipeline = jedis.pipelined ();
					for (ibillidentify identify:billidentifylist) {string key = (string) identify.uniqueidentify ();
					Needlocking.add (key);
				PIPELINE.SETNX (key, key);
				} logger.debug ("Try Lock keys:" + needlocking);
				Commit Redis Execution count list<object> results = Pipeline.syncandreturnall ();
					for (int i = 0; i < results.size (); ++i) {Long result = (long) results.get (i);
					String key = Needlocking.get (i);
						if (result = = 1) {//Setnx successful, get lock Jedis.expire (key, Default_batch_expire_time);
					Locked.add (key);	} needlocking.removeall (Locked);
				Lock resource Removal if (Collectionutils.isempty (needlocking)) {return true;
				else {//Some resources could not be locked Logger.debug ("keys:" + needlocking + "locked by another business:");
				} if (timeout = = 0) {break; }
				Thread.Sleep (500);

			while ((System.nanotime ()-Nano) < Unit.tonanos (timeout)); The lock is not unlocked, releasing the locked part of the object and returning the failed if (!
			Collectionutils.isempty (Locked)) {Jedis.del (Locked.toarray (new string[0]));
		return false;
			catch (jedisconnectionexception je) {logger.error (Je.getmessage (), je);
		Returnbrokenresource (Jedis);
		catch (Exception e) {logger.error (E.getmessage (), E);
		finally {Returnresource (Jedis);
	return true; /** * Bulk Release lock * @author HTTP://BLOG.CSDN.NET/JAVA2000_WL * @param billidentifylist * * public void UnLock (LIST&L
		T;ibillidentify> billidentifylist) {list<string> keys = new copyonwritearraylist<string> ();
			for (ibillidentify identify:billidentifylist) {string key = (string) identify.uniqueidentify ();
		Keys.add (key);
		} Jedis Jedis = null;
			try {Jedis = GetResource ();
			Jedis.del (Keys.toarray (new string[0));
		Logger.debug ("Release lock, Keys:" + keys); catch (JedisconnectionexcEption je) {logger.error (Je.getmessage (), je);
		Returnbrokenresource (Jedis);
		catch (Exception e) {logger.error (E.getmessage (), E);
		finally {Returnresource (Jedis); }/** * @author http://blog.csdn.net/java2000_wl * @date 2013-7-22 PM 9:33:45 * @return * * Private Jedis get
	Resource () {return jedispool.getresource (); /** * Destroy connection * @author HTTP://BLOG.CSDN.NET/JAVA2000_WL * @param jedis/private void Returnbrokenresource (Je
		Dis Jedis) {if (Jedis = = null) {return;
		try {//Fault tolerant Jedispool.returnbrokenresource (Jedis);
		catch (Exception e) {logger.error (E.getmessage (), E); 
		}/** * @author http://blog.csdn.net/java2000_wl * @param jedis/private void Returnresource (Jedis Jedis) {
		if (Jedis = = null) {return;
		try {jedispool.returnresource (Jedis);
		catch (Exception e) {logger.error (E.getmessage (), E); }
	}