Jedispool use principle and source code

Use of 1,jedispool

<!--Connection Pool configuration information--<beanid= "Jedisconfig" class= "Redis.clients.jedis.JedisPoolConfig" ><!--shows how many Jedis instances a pool can have --<propertyname= "Maxactive" value= "ten"/><!--Max Idle--><propertyname= "Maxidle" value= "5"/><!--min .<propertyname= "Minidle" value= "1"/>< Whether to check connectivity availability (ping ()) When a Jedis instance is obtained --<propertyname= "Testonborrow" value= "true"/><!--return a Jedis instance to the pool, check connectivity availability (ping ()) --<propertyname= "Testonreturn" value= "true"/><!--idle condition monitoring is checked with asynchronous thread evict,<propertyname= "Testwhileidle" value= "true"/><!--The number of Jedis instances in a pool of up to evict<propertyname= "Numtestsperevictionrun" value= "ten"/><!--test idle thread-time interval-<propertyname= "Timebetweenevictionrunsmillis" value= "60000"/><!--maximum wait time --<propertyname= "maxwait" value= "/><propertyname=" whenexhaustedaction "value=" "/>//WHEN_EXHAUSTED _fail = 0;    Throw the exception directly throw new Nosuchelementexception ("Pool exhausted"); When_exhausted_block = 1;borrowobject () will block until a new or idle object is available, or if MAXWAIT is configured,//If the request blocking timeout is    Throws Nosuchelementexception. If the maxwait is negative, the request will have no limit to the resistance//plug down, the default configuration. When_exhausted_grow = 2;borrowobject () will continue to create a new object and return, so the number of images maintained by the pool will exceed maxactive;//&LT;/BEAN&G T

public String set(String key, String value) {    Jedis jedis = null;    boolean success = true;    try {        jedis = this.pool.getResource();        return jedis.set(key, value);    }catch (JedisException e) {        success  = false;        if(jedis != null){            pool.returnBrokenResource(jedis);        }        throw e;    }finally{        if(success && jedis != null){            this.pool.returnResource(jedis);        }    }}

Get Jedis

pool.getResource();

The GetResource method that can directly see the pool,

Eventually, it's genericobjectpool. borrowobject () method borrowing objects

@SuppressWarnings("unchecked")public T getResource() {    try {        return (T) internalPool.borrowObject();    } catch (Exception e) {        throw new JedisConnectionException(                "Could not get a resource from the pool", e);    }}

When the return is exhausted, the Genericobjectpool returnobject () method is called.

pool.returnResource(jedis)

//JedisPool.java

public void returnResource(final BinaryJedis resource) {    returnResourceObject(resource);}//Pool.java

publicvoid returnResourceObject(final Object resource) {try {    internalPool.returnObject(resource);} catch (Exception e) {    throw new JedisException(            "Could not return the resource to the pool", e);}}

Error, calling the Invalidateobject () method of the Genericobjectpool

Finally, call Jedis.quit () in Jedisfactory's Destroyobject () request server to close the connection

pool.returnBrokenResource(jedis)//JedisPool.java

public void returnBrokenResource(final BinaryJedis resource) {    returnBrokenResourceObject(resource);}//Pool.javaprotectedvoid returnBrokenResourceObject(final Object resource) {    try {        //失效        internalPool.invalidateObject(resource);    } catch (Exception e) {        thrownew JedisException(                "Could not return the resource to the pool", e);    }}//GenericObjectPool

publicvoid invalidateObject(Object obj)throws Exception{try{  if (this._factory != null)    this._factory.destroyObject(obj);}finally {  synchronized (this) {    this._numActive -= 1;    allocate();  }}}//JedisFactory

publicvoid destroyObject(final Object obj) throws Exception {    if (obj instanceof Jedis) {        final Jedis jedis = (Jedis) obj;        if (jedis.isConnected()) {            try {                try {                    jedis.quit();                } catch (Exception e) {                }                jedis.disconnect();            } catch (Exception e) {            }        }    }}

Jedispool Source Code

Package Redis.clients.jedis;import Org.apache.commons.pool.basepoolableobjectfactory;import Org.apache.commons.pool.impl.genericobjectpool.config;import Redis.clients.util.pool;publicclassjedispoolextendspool<jedis> {Public Jedispool (Final Config poolconfig, final String host) {This (Poolconfig, host, Protocol.default_port, PROTOC Ol.    Default_timeout, NULL, protocol.default_database); Public Jedispool (String host, int. port) {This (new Config (), host, port, protocol.default_timeout, NULL, Proto Col.    Default_database);    Public Jedispool (final String host) {This (host, protocol.default_port);  Public Jedispool (Final Config poolconfig, final string host, int port, int timeout, final string password)    {This (poolconfig, host, port, timeout, password, protocol.default_database); Public Jedispool (Final Config poolconfig, final String host, Finalint port) {This (Poolconfig, host, Port, Pro Tocol.    Default_timeout, NULL, protocol.default_database); } public Jedispool (final Config poolconfig, final String host, Finalint port, finalint timeout) {This (poolconfi    G, host, port, timeout, null, protocol.default_database); } PublIC Jedispool (Final Config poolconfig, final string host, int port, int timeout, final string password,    Finalint database) {super (Poolconfig, New Jedisfactory (host, port, timeout, password, database));    } publicvoid Returnbrokenresource (final Binaryjedis Resource) {Returnbrokenresourceobject (Resource);    } publicvoid Returnresource (final Binaryjedis Resource) {Returnresourceobject (Resource);     }/** * Poolableobjectfactory custom Impl. */PrivatestaticClassjedisfactoryextendsbasepoolableobjectfactory {Privatefinal String host;        Privatefinalint Port;        Privatefinalint timeout;        privatefinal String password;        Privatefinalint database; Public Jedisfactory (final string host, Finalint port, finalint timeout, final string password, Finalint dat            Abase) {super ();            This.host = host;            This.port = port;            This.timeout = timeout;            This.password = password;        This.database = database; } public Object Makeobject () throws Exception {final Jedis Jedis = new Jedis (This.host, This.port, this            . Timeout);            Jedis.connect ();            if (null! = This.password) {Jedis.auth (This.password);            } if (Database! = 0) {jedis.select (database);        } return Jedis;                } publicvoid destroyobject (final Object obj) throws Exception {if (obj instanceof Jedis) { Final Jedis JEdis = (Jedis) obj;                        if (jedis.isconnected ()) {try {try {jedis.quit ();                    } catch (Exception e) {} jedis.disconnect (); } catch (Exception e) {}}}} Publicboolean Vali                Dateobject (final Object obj) {if (obj instanceof Jedis) {final Jedis Jedis = (Jedis) obj; try {return jedis.isconnected ();/ * && jedis.ping (). Equals ("PONG"); */} catch (Final Exception e) {returnfalse;            }} else {returnfalse; }        }    }}

Where Jedisfactory inherits from Basepoolableobjectfactory, only 3 methods are implemented

Makeobject (), Connection, new Socket ()

Destroyobject ()--Disconnect,

Validateobject ()--ping

Pool Source Code

Package Redis.clients.util;import Org.apache.commons.pool.poolableobjectfactory;import Org.apache.commons.pool.impl.genericobjectpool;import redis.clients.jedis.exceptions.JedisConnectionException; Import Redis.clients.jedis.exceptions.jedisexception;publicabstractclasspool<t> {Privatefinal Genericobjectpool Internalpool; Public Pool (Final genericobjectpool.config poolconfig, Poolableobjectfactory Factory) {This.internalpoo    L = new Genericobjectpool (factory, Poolconfig); } @SuppressWarnings ("Unchecked") public T getresource () {try {return (T) internalpool.borrowobje        CT (); } catch (Exception e) {thrownew jedisconnectionexception ("Could not get a resource from th        E Pool ", e); }} publicvoid returnresourceobject (final Object Resource) {try {internalpool.returnobject (Resou        RCE); } catch (Exception e) {thrownew jedisexception ("Could not return the resource to the pool"        , e);    }} publicvoid Returnbrokenresource (final T Resource) {Returnbrokenresourceobject (Resource);    } publicvoid Returnresource (final T Resource) {Returnresourceobject (Resource); } protectedvoid ReturnbrokEnresourceobject (Final Object Resource) {try {             //FailureInternalpool.invalidateobject (Resource); } catch (Exception e) {thrownew jedisexception ("Could not return the resource to the pool"        , e);        }} publicvoid destroy () {try {internalpool.close ();        } catch (Exception e) {thrownew jedisexception ("Could not destroy the pool", e); }    }}

Jedispoolconfig Source Code

PublicClassjedispoolconfigextendsconfig {Public Jedispoolconfig () {//defaults to make your life with connection pool easier:)        Settestwhileidle (TRUE);        Setminevictableidletimemillis (60000);        Settimebetweenevictionrunsmillis (30000);    Setnumtestsperevictionrun (-1);    } publicint Getmaxidle () {return maxidle;    } publicvoid setmaxidle (int maxidle) {this.maxidle = Maxidle;    } publicint Getminidle () {return minidle;    } publicvoid setminidle (int minidle) {this.minidle = Minidle;    } publicint getmaxactive () {return maxactive;    } publicvoid setmaxactive (int maxactive) {this.maxactive = maxactive;    } Publiclong getmaxwait () {return maxwait;    } publicvoid setmaxwait (Long maxwait) {this.maxwait = maxwait;    } publicbyte Getwhenexhaustedaction () {return whenexhaustedaction;    } publicvoid setwhenexhaustedaction (byte whenexhaustedaction) {this.whenexhaustedaction = whenExhaustedAction;    } Publicboolean Istestonborrow () {return testonborrow; } publicvoid SEttestonborrow (Boolean testonborrow) {this.testonborrow = Testonborrow;    } Publicboolean Istestonreturn () {return testonreturn;    } publicvoid Settestonreturn (Boolean testonreturn) {This.testonreturn = Testonreturn;    } Publicboolean Istestwhileidle () {return testwhileidle;    } publicvoid Settestwhileidle (Boolean testwhileidle) {this.testwhileidle = Testwhileidle;    } Publiclong Gettimebetweenevictionrunsmillis () {return timebetweenevictionrunsmillis; } publicvoid Settimebetweenevictionrunsmillis (Long timebetweenevictionrunsmillis) {This.timebetween    Evictionrunsmillis = Timebetweenevictionrunsmillis;    } publicint Getnumtestsperevictionrun () {return numtestsperevictionrun; } publicvoid setnumtestsperevictionrun (int numtestsperevictionrun) {This.numtestsperevictionrun = NumTestsPerEv    Ictionrun; } Publiclong Getminevictableidletimemillis () {return minevictaBleidletimemillis; } publicvoid Setminevictableidletimemillis (Long minevictableidletimemillis) {This.minevictableidletimemillis =    Minevictableidletimemillis;    } Publiclong Getsoftminevictableidletimemillis () {return softminevictableidletimemillis; } publicvoid Setsoftminevictableidletimemillis (Long softminevictableidletimemillis) {This.softminev    Ictableidletimemillis = Softminevictableidletimemillis; }}

 

Jedispool use principle and source code