Features for publishing subscriptions with Reids

Redis is now longer used as a cache server, NoSQL database, and it also has the ability to publish subscriptions that implement messages. This article will implement a demo that uses Redis to implement a publish subscription feature

First, use an entity object

Package Com.wtf.demo.redis;import Java.io.serializable;public class UserBean implements Serializable {private String us   Ername;   Private String address;   Public String GetUserName () {return username;   } public void Setusername (String username) {this.username = username;   } public String getaddress () {return address;   The public void setaddress (String address) {this.address = address; }}

We will publish this object when this object, and can change the properties of this object, publish the code as follows

package com.wtf.demo.redis;import redis.clients.jedis.jedis;import  Java.io.bytearrayoutputstream;import java.io.ioexception;import java.io.objectoutputstream;public  class testpub {   public static void main (String[] args)  throws IOException {      // TODO Auto-generated  Method stub      jedis jedis = new jedis ("127.0.0.1", 6379);       userbean ub = new userbean ();       ub.setusername ("Zhang San"),       ub.setaddress ("Shanghai City");       bytearrayoutputstream os = new bytearrayoutputstream ();        objectoutputstream op = new objectoutputstream (OS);       op.writeobject (UB); &NBsp;     string msg1 = os.tostring ("iso-8859-1");       jedis.publish ("UB",  MSG1);    }}

After the publication is completed, we create a subscription class, which releases the UB object, and in the subscription class we need to jedispubsub the object and implement the relevant methods inside.

package com.wtf.demo.redis;import redis.clients.jedis.jedis;import  Redis.clients.jedis.jedispubsub;import java.io.bytearrayinputstream;import java.io.objectinputstream ;p ublic class testsub {        public static  Void main (String[] args)  {          jedis  jedis = new jedis ("uat.www.nanapanda.cn", 6379);           jedispubsub jedispubsub = new jedispubsub ()  {              @Override              public void onunsubscribe (string channel, int  Subscribedchannels)  {            }              @Override             public void  Onsubscribe (string channel, int subscribedchannels)  {             }            @ override            public void  Onpunsubscribe (string pattern, int subscribedchannels)  {             }              @Override             public void  Onpsubscribe (string pattern, int subscribedchannels)  {             }            @ override             public void onpmessage (String pattern,  string channel,                 string message)  {            }              @Override              public void onmessage (String channel,  String message)  {               try {                 bytearrayinputstream bis = new bytearrayinputstream (                     message.getbytes (" Iso-8859-1 "));//Specify the character set here to encode the string into a byte array,The character set needs to be consistent with the character set at publish time                  objectinputstream ois = new objectinputstream (bis);                 UserBean bean =  (UserBean)  ois.readobject ();                 system.out.println (Bean.getusername ());                 system.out.println (Bean.getaddress ());               } catch  (exception e)  {                 e.printstacktrace ();               } finally {               }             }          };           jedis.subscribe (jedispubsub,  "UB");         }}

So after running the Testpub class, then run the TestSub class, you will have the following output

--------------------

Tom
Shanghai City

Change the properties of the Userbean in Testpub, change the address to Beijing, and the subscription window will have the following values

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Tom

Beijing

Features for publishing subscriptions with Reids