Java implements Message Queuing with Redis

Application Scenarios

• Why use Redis?
  Binary storage, Java serialization transfer, high IO connections, frequent connections

First, serialization

A Java serialization tool has been written to convert the object into a byte array and deserialize it into a Java object based on a byte array; The main use of Bytearrayoutputstream and bytearrayinputstream; Note: Each object that needs to be serialized must implement the Serializable interface;
The code is as follows:

1 package Utils; 2 Import java.io.*; 3/** 4  * Created by KINGLF on 2016/10/17.5 */  6 public class Objectutil {7     /** 8      * object to byte[] 9      * @p Aram Obj10      * @return11      * @throws IOException12      */13 public     static byte[] object2bytes (Object obj) Throws ioexception{14         Bytearrayoutputstream bo=new bytearrayoutputstream ();         ObjectOutputStream oo=new ObjectOutputStream (bo);         oo.writeobject (obj);         byte[] Bytes=bo.tobytearray ();         bo.close (); 19         oo.close (),         return bytes;21     }22     /**23      * byte[] turn to object      @param bytes25      * @ Return26      * @throws Exception27      */28 public     static Object bytes2object (byte[] bytes) throws exception{29         bytearrayinputstream in=new bytearrayinputstream (bytes);         ObjectInputStream sin=new ObjectInputStream (in);         return Sin.readobject ();     }33}

Second, message Class (implement Serializable interface)

Package Model;import java.io.serializable;/** * Created by KINGLF on 2016/10/17. */public class Message implements Serializable {    private static final long Serialversionuid = -389326121047047723l;
   private int id;    Private String content;    public Message (int ID, String content) {        this.id = ID;        this.content = content;    }    public int getId () {        return ID;    }    public void setId (int id) {        this.id = ID;    }    Public String getcontent () {        return content;    }    public void SetContent (String content) {        this.content = content;    }}

Third, the operation of Redis

Using Redis as a queue, we use the push and pop operations of the list in Redis;
Characteristics of the combined queue:
只允许在一端插入新元素只能在队列的尾部FIFO:先进先出原则Lpush 头入 (Rpop 尾出 ) or Rpush 尾入 (lpop) in Redis 头出 can meet the requirements, while the object for list drug push or pop in Redis only needs to be converted to byte[]
　　java采用Jedis进行Redis的存储和Redis的连接池设置
On the code:

Package Utils;import Redis.clients.jedis.jedis;import Redis.clients.jedis.jedispool;import Redis.clients.jedis.jedispoolconfig;import java.util.list;import java.util.map;import java.util.Set;/** * Created by KINGLF on 2016/10/17.    */public class Jedisutil {private static String jedis_ip;    private static int jedis_port;    private static String Jedis_password;    private static Jedispool Jedispool;        static {//configuration Self-written configuration file resolution class, inherited from the properties configuration conf=configuration.getinstance ();        Jedis_ip=conf.getstring ("Jedis.ip", "127.0.0.1");        Jedis_port=conf.getint ("Jedis.port", 6379);        Jedis_password=conf.getstring ("Jedis.password", null);        Jedispoolconfig config=new jedispoolconfig ();        Config.setmaxactive (5000);        Config.setmaxidle (256);        Config.setmaxwait (5000L);        Config.settestonborrow (TRUE);        Config.settestonreturn (TRUE);        Config.settestwhileidle (TRUE); Config.setminevictableidletimemillis (60000L);        Config.settimebetweenevictionrunsmillis (3000L);        Config.setnumtestsperevictionrun (-1);    Jedispool=new Jedispool (config,jedis_ip,jedis_port,60000); /** * Get Data * @param key * @return */public static string get (String key) {string Value=nul        L        Jedis Jedis=null;            try{Jedis=jedispool.getresource ();        Value=jedis.get (key);            }catch (Exception e) {jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        }finally {Close (Jedis);    } return value;        } private static void Close (Jedis Jedis) {try{jedispool.returnresource (Jedis);                }catch (Exception e) {if (jedis.isconnected ()) {jedis.quit ();            Jedis.disconnect ();        }}} public static byte[] Get (byte[] key) {byte[] value = NULL;        Jedis Jedis = null; try {Jedis = Jedispool.getresoUrce ();        Value = Jedis.get (key);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);    } return value;        } public static void set (Byte[] key, byte[] value) {Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Jedis.set (key, value);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);        }} public static void set (Byte[] key, byte[] value, int time) {Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();            Jedis.set (key, value);        Jedis.expire (key, time);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis); E.pRintstacktrace ();        } finally {//return to Connection pool close (Jedis);        }} public static void Hset (byte[] key, byte[] field, byte[] value) {Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Jedis.hset (Key, field, value);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);        }} public static void Hset (String key, String field, String value) {Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Jedis.hset (Key, field, value);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis); }}/** * Get data * * @param key * @return */public static StringHget (String key, String field) {string value = null;        Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Value = Jedis.hget (key, field);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);    } return value;        }/** * Get data * * @param key * @return */public static byte[] Hget (byte[] key, byte[] field) {        byte[] value = NULL;        Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Value = Jedis.hget (key, field);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);    } return value; } public static void Hdel (byte[] key, byte[] field) {JedisJedis = null;            try {Jedis = Jedispool.getresource ();        Jedis.hdel (key, field);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis); }}/** * Store Redis Queue Order Store * @param key Reids Key Name * @param value Key value */public static void Lpush (byt        E[] key, byte[] value) {Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Jedis.lpush (key, value);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis); }}/** * Storage Redis Queue Reverse storage * @param key Reids Key Name * @param value Key value */public static void Rpush (byt        E[] key, byte[] value) {Jedis Jedis = null; try {Jedis = JedispoOl.getresource ();        Jedis.rpush (key, value);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis); }}/** * pops the last element in the list source (the trailing element) and returns it to the client * @param key Reids Key name * @param destination Key value */PU        Blic static void Rpoplpush (byte[] key, byte[] destination) {Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Jedis.rpoplpush (key, destination);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis); }}/** * Get queue data * @param key Key Name * @return * */public static List lpoplist (byte[] key) {L        IST list = null;        Jedis Jedis = null; try {Jedis = Jedispool.getresource();        List = Jedis.lrange (key, 0,-1);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);    } return list; /** * Get Queue data * @param key Key Name * @return * * public static byte[] Rpop (byte[] key) {byte[] b        Ytes = null;        Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        bytes = Jedis.rpop (key);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);    } return bytes;        } public static void Hmset (Object key, Map hash) {Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Jedis.hmset (key.tostring (), hash); } catch (Exception e) {//release REDis Object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);        }} public static void Hmset (Object key, Map hash, int time) {Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();            Jedis.hmset (key.tostring (), hash);        Jedis.expire (Key.tostring (), time);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);        }} public static list Hmget (Object key, String ... fields) {list result = null;        Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        result = Jedis.hmget (key.tostring (), fields);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace (); } finally{//Return to Connection pool close (Jedis);    } return result;        public static set Hkeys (String key) {set result = NULL;        Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        result = Jedis.hkeys (key);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);    } return result;        } public static list Lrange (byte[] key, int from, int to) {list result = null;        Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        result = Jedis.lrange (key, from, to);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);    } return result; } public static Map Hgetall (byte[] Key) {MAP result = null;        Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        result = Jedis.hgetall (key);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);    } return result;        } public static void Del (byte[] key) {Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Jedis.del (key);            } catch (Exception e) {//Releases Redis object Jedispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);        }} public static long Llen (byte[] key) {long len = 0;        Jedis Jedis = null;            try {Jedis = Jedispool.getresource ();        Jedis.llen (key); } catch (Exception e) {//Releases Redis object JEDispool.returnbrokenresource (Jedis);        E.printstacktrace ();        } finally {//return to Connection pool close (Jedis);    } return len; }}

Configuration information for Redis is mainly used to read

Package Utils;import java.io.ioexception;import Java.io.inputstream;import java.util.properties;/** * Created by KINGLF on 2016/10/17.    */public class Configuration extends Properties {private static final long serialversionuid = -2296275030489943706l;    private static Configuration instance = NULL; public static synchronized Configuration getinstance () {if (instance = = null) {instance = new Configur        Ation ();    } return instance;        } public string GetProperty (string key, String defaultvalue) {string val = GetProperty (key); return (val = = NULL | | val.isempty ())?    Defaultvalue:val;    public string getString (string name, String defaultvalue) {return This.getproperty (name, DefaultValue);        } public int GetInt (string name, int defaultvalue) {string val = This.getproperty (name); return (val = = NULL | | val.isempty ())?    DefaultValue:Integer.parseInt (Val); } public long Getlong (String name, longDefaultValue) {String val = this.getproperty (name); return (val = = NULL | | val.isempty ())?    DefaultValue:Integer.parseInt (Val);        } Public float GetFloat (string name, float defaultvalue) {string val = This.getproperty (name); return (val = = NULL | | val.isempty ())?    DefaultValue:Float.parseFloat (Val);        } public double GetDouble (string name, double defaultvalue) {string val = This.getproperty (name); return (val = = NULL | | val.isempty ())?    DefaultValue:Double.parseDouble (Val);        } public byte GetByte (string name, byte defaultvalue) {string val = This.getproperty (name); return (val = = NULL | | val.isempty ())?    DefaultValue:Byte.parseByte (Val); Public Configuration () {InputStream in = Classloader.getsystemclassloader (). getResourceAsStream ("config +")        ;            try {this.loadfromxml (in);        In.close (); } catch (IOException IoE) {}}}

V. Testing

Import Model.message;import utils.jedisutil;import Utils.objectutil;import Redis.clients.jedis.jedis;import java.io.ioexception;/** * Created by KINGLF on 2016/10/17.    */public class Testredisqueue {public static byte[] Rediskey = "key". GetBytes ();        static {try {init ();        } catch (IOException e) {e.printstacktrace ();  }} private static void Init () throws IOException {for (int i = 0; i < 1000000; i++) {Message            message = new Message (I, "This is the first" + i + "content");        Jedisutil.lpush (Rediskey, objectutil.object2bytes (message));        }} public static void Main (string[] args) {try {pop ();        } catch (Exception e) {e.printstacktrace ();        }} private static void Pop () throws Exception {byte[] bytes = Jedisutil.rpop (Rediskey);        Message msg = (message) objectutil.bytes2object (bytes); if (msg! = null) {System.out.println (Msg.getid () + "----" + msg.getcontent ()); }    }}

Each time the Pop () method is executed, the result is as follows:
<br>1----This is the 1th content
<BR>2----This is the 2nd content
<br>3----This is the 3rd content
<br>4----This is the 4th content

Summarize

至此,整个Redis消息队列的生产者和消费者代码已经完成

1. Message需要传送的实体类(需实现Serializable接口)
2. ConfigurationRedis的配置读取类,继承自Properties
3. Objectutil将对象和byte数组双向转换的工具类
4. Jedis通过消息队列的先进先出(FIFO)的特点结合Redis的list中的push和pop操作进行封装的工具类

Java implements Message Queuing with Redis