Java Operating Redis DB instance (Redis cluster)

1. Configuring Redis Cluster

<?xml version= "1.0" encoding= "UTF-8"?><rediscluster><!--userroute--><clustergroup name= " Userroute "selectdb=" 1 "><server host=" 10.177.129.16 "port=" 6379 "></server><server host=" 10.177.129.15 "port=" 6379 "></server></clusterGroup><!--sessionroute--><clustergroup Name = "Sessionroute" selectdb= "2" ><server host= "10.177.129.16" port= "6379" ></server><server host= " 10.177.129.15 "port=" 6379 "></server></clusterGroup><!--publicdata--><clustergroup name=" Publicdata "><server host=" 10.177.129.16 "port=" 6379 "></server><server host=" 10.177.129.15 "port= "6379" ></server></clusterGroup></redisCluster>

2. Create a Redis connection attribute entity class

Package com.isoftstone.cms.syscore.pojo;/** * Redis Connection Properties * @author Xiakai * */public class Rediscluster {private String sel Ectdb;private string Hostip;private stringport;public string Getselectdb () {return selectdb;} public void Setselectdb (String selectdb) {this.selectdb = Selectdb;} Public String Gethostip () {return hostip;} public void Sethostip (String hostip) {this.hostip = HostIP;} Public String Getport () {return port;} public void Setport (String port) {this.port = port;}}

3. Analyzing redis cluster configuration

Package Com.iss.itreasury.test.jedis;import Java.io.ioexception;import Java.util.arraylist;import Java.util.hashmap;import java.util.iterator;import java.util.list;import Java.util.map;import java.util.Set;import Org.dom4j.document;import Org.dom4j.documentexception;import Org.dom4j.element;import Org.dom4j.io.SAXReader; Import Org.springframework.core.io.ClassPathResource; Import Org.springframework.core.io.Resource; import org.springframework.core.io.support.encodedresource;/** * resolves redis cluster configuration * @author Xiakai * */public class redisconfig {public static map<string,list<rediscluster>> Redisgroupmap = null;//parameter Constructor public redisconfig () {}//gets all Clustergroup group key values to public static map<string,list<rediscluster>> Getredisgroupmap () {// Read XML file document Document=readxmlfile ();//Get Clustergroup node key and listif (Redisgroupmap = = null) {redisgroupmap= Getmapbyitemsgroup (document);} return redisgroupmap;} Read Redisconfig configuration file private static document Readxmlfile () {//Create read-in Object Saxreader reaDer = new Saxreader ();    Create document instance document Doc=null;     try {//load file from Classpath redisconfig.xml Resource Resource = new Classpathresource ("Redisclusterconfig.xml"); Specifies the encoding format (UTF-8) corresponding to the file resource in order to correctly read the contents of the file without garbled encodedresource Encoderesource = new Encodedresource (Resource, "UTF-8")     ;     doc = Reader.read (Encoderesource.getreader ());} catch (IOException e) {System.out.println ("Unable to read system configuration file Redisconfig.xml, possibly the file does not exist"),} catch (Documentexception e) {System . OUT.PRINTLN ("An exception occurred in parsing the redisconfig.xml file");} return doc;} Reads the XML node and returns the Mapprivate static map<string,list<rediscluster>> Getmapbyitemsgroup of the node Redisgroup ( Document document) {map<string,list<rediscluster>> Itemmap=new Hashmap<string,list<rediscluster >> (); try{//gets the root node element root=document.getrootelement ();//gets listlist itemslist= for all child nodes under the root node Clustergroup Root.selectnodes ("./clustergroup"); for (int i=0;i<itemslist.size (); i++) {//Get node itemselement items= (Element) Itemslist.get (i); String Groupname=items. Attribute ("name"). GetText (); String Selectdb = Items.attribute ("Selectdb") ==null? "": Items.attribute ("Selectdb"). GetText ();//if (groupname!=null &&groupname.equals (This.getgroupname ())) {//Get a list of all child node service Clustergroup under the Itemlist=items.elements ();  Get the value of the service node list<rediscluster> redisclusterlist = GetItemList (ITEMLIST,SELECTDB); Itemmap.put (GroupName, redisclusterlist);//}}}catch (Exception e) {}return itemmap;} Get the Redis service node for all item under node private static list<rediscluster> GetItemList (List itemlist,string selectdb) {list< rediscluster> redisclusterlist = new arraylist<rediscluster> (); for (int i=0;i<itemlist.size (); i++) {// Get node Serverelement item= (Element) itemlist.get (i); String HostIP = Item.attribute ("host"). GetText (); String port = item.attribute ("port"). GetText (); Rediscluster rediscluster =new rediscluster (); Rediscluster.sethostip (HostIP); Rediscluster.setport (port);   Rediscluster.setselectdb (SELECTDB); Redisclusterlist.add (Rediscluster); }return RediscLusterlist;} public static void Main (string[] args) {getredisgroupmap ();//jedisutil.insertpublicdataobject ("User1", "Zhang San", Jedisutil.online_user);//jedisutil.insertpublicdataobject ("User2", "John Doe", jedisutil.online_user);//  Jedisutil.insertpublicdataobject ("User3", "Harry", Jedisutil.online_user);  Set s = jedisutil.getallset (Jedisutil.online_user);   Iterator it = S.iterator ();   while (It.hasnext ()) {string key = (string) it.next ();   String value = jedisutil.getstring (Key,jedisutil.online_user);  SYSTEM.OUT.PRINTLN (key + value); }string test = jedisutil.getstring ("user1", Jedisutil.online_user); SYSTEM.OUT.PRINTLN (test);}}

4. Tools to operate the Redis database

Package Com.isoftstone.cms.syscore.utils;import Java.lang.reflect.type;import Java.util.list;import java.util.Set; Import Java.util.zip.crc32;import Redis.clients.jedis.jedis;import Redis.clients.jedis.exceptions.jedisconnectionexception;import Com.google.gson.gson;import Com.isoftstone.cms.syscore.pojo.rediscluster;public class Jedisutil {//Database public static final String Store_loginuser = "4";//Merchant login user public static final string store_info = "5";//Merchant status Merchant Purchase service validity period public static final String Check_code = "6";//Test Code public static final String menu = "7";//all menu public static final String service = "8";//service Charge Information public static final Strin G Store_loginkey = "9";//Initialize login public key to//fixed keypublic static final String All_menu_key = "All_menu_key";p ublic static final String buy_service_key = "Buy_service_key";//service charge purchase keypublic static final String All_service_key = "All_service_key";// All services public static final String menu_authority = "menu_authority";//Menu Permissions public static final String store_menu_key = "STORE_menu_key ";//Require Merchant assigned business menu public static final String Store_service_key =" Store_service_key ";//merchant charges keypublic static Final string syste_menu_key = "Syste_menu_key";//System Management menu key//Jedis Service Group Business type public static final string cont_clustername_ Publicdata = "Publicdata";p ublic static final String Cont_clustername_sessionroute = "Sessionroute";p ublic static final S Tring Cont_clustername_userroute = "Userroute";//operation mode 0 Insert 1 Get 2 Remove public static final long insert_operation = 0;public s Tatic final Long get_operation = 1;public static final Long delete_operation = 2;//Verification code expires in seconds public static final int CHECKCO  De_expireseconds = 5*60;//session expires seconds public static final int expireseconds = $ * 60;private static void Closejedis (Jedis Jedis) {try {jedis.quit ();} catch (Jedisconnectionexception e) {e.printstacktrace ();} Jedis.disconnect ();} /** * Get string based on key * * @param key * @param jedisgroup */public static string getString (string key, String selectdb) {Jedis J Edis = Getpublicdatajedis (key, Get_operation, SelecTDB); return Jedis.get (key);} /** * Get all data set * @param selectdb * @return */public static set Getallset (String selectdb) {Jedis Jedis = Getdatajedis (get _operation, Selectdb); return Jedis.keys ("*");} /** * Default fetching of the first database of the configuration file * @param operation * @param selectdb * @return */private static Jedis Getdatajedis (long operation, St Ring Selectdb) {if (Redisconfig.redisgroupmap = = null) {Redisconfig.redisgroupmap = Redisconfig.getredisgroupmap ();} list<rediscluster> clusterslist = RedisConfig.redisGroupMap.get (cont_clustername_publicdata); int clusterno = 0 ;//default to the first rediscluster cluster = Clusterslist.get (Clusterno); Jedis Jedis = new Jedis (Cluster.gethostip (), Integer.valueof (Cluster.getport ())), Jedis.select (Integer.valueof ( SELECTDB)); return Jedis;} /** * Delete Data * * @param key * @param jedisgroup */public static void DeleteObject (string key, String jedisgroup) {Jedis jedi s = Getjedis (key, Jedisgroup, delete_operation); Jedis.del (key); Closejedis (Jedis);} /** * Delete public data * * @param key * @param objclass * @pAram Selectdb */public static void Deletepublicdataobject (string key, String selectdb) {Jedis Jedis = Getpublicdatajedis (k EY, delete_operation, Selectdb); Jedis.del (key); Closejedis (Jedis);} /** * Get Jedis Library instance * * @param key * @param jedisgroup * @param operation * @return */private static Jedis Getjedis (String k EY, String Jedisgroup, long operation) {if (Redisconfig.redisgroupmap = = null) {Redisconfig.redisgroupmap = REDISCONFIG.G Etredisgroupmap ();} list<rediscluster> clusterslist = RedisConfig.redisGroupMap.get (jedisgroup); int arraylength = Clusterslist.size ();//The information should be credited to the int clusterno = Getredisno (key, Arraylength) based on the key value; Rediscluster cluster = Clusterslist.get (Clusterno); Jedis Jedis = new Jedis (Cluster.gethostip (), Integer.valueof (Cluster.getport ())), Jedis.select (Integer.valueof ( Cluster.getselectdb ())); return Jedis;} /** * Redis Key Value gets Object * * @param key * @param objclass * @param jedisgroup * @return */public static object GetObject (Strin G Key, Class objclass, String jedisgroup) {Jedis Jedis = Getjedis (key, Jedisgroup, get_operation); String sobj = Jedis.get (key); Closejedis (Jedis); Gson Gson = new Gson (); return Gson.fromjson (Sobj, objclass);} /** * Get library instances of public data Jedis * * @param key * @param jedisgroup * @param operation * @return */private static Jedis getpublicdata Jedis (string key, long operation, string selectdb) {if (Redisconfig.redisgroupmap = = null) {Redisconfig.redisgroupmap = Re Disconfig.getredisgroupmap ();} list<rediscluster> clusterslist = RedisConfig.redisGroupMap.get (cont_clustername_publicdata); int arraylength = Clusterslist.size ();//The information should be credited to the int clusterno = Getredisno (key, Arraylength) based on the key value; Rediscluster cluster = Clusterslist.get (Clusterno); Jedis Jedis = new Jedis (Cluster.gethostip (), Integer.valueof (Cluster.getport ())), Jedis.select (Integer.valueof ( SELECTDB)); return Jedis;} /** * Publicdata Redis Key Value Gets Object * * @param key * @param objclass * @param jedisgroup * @return */public static Object Getp Ublicdataobject (String key, Class objclass, string sELECTDB) {Jedis Jedis = Getpublicdatajedis (key, Get_operation, SELECTDB); String sobj = Jedis.get (key); Closejedis (Jedis); Gson Gson = new Gson (); return Gson.fromjson (Sobj, objclass);}  /** * Publicdata Redis key value gets Object list<entity> * * @param key * @param objclass * @param jedisgroup * @return */public Static Object Getpublicdataobjectbytype (string key, type type, string selectdb) {Jedis Jedis = Getpublicdatajedis (Key, GE T_operation, SELECTDB); String sobj = Jedis.get (key); Closejedis (Jedis); Gson Gson = new Gson (); return Gson.fromjson (Sobj, type);}  /** * Get Redis Server Library number * * @param hashkey * @return */public static int Getredisno (String key, int arraySize) {Long HashKey = Hash (key), int redisno = (int) (hashkey% arraySize); return Redisno;} /** * Calculates the hash value based on the key value * * @param k * @return */public static long hash (String k) {CRC32 CRC32 = new CRC32 (); Crc32.update (K.G Etbytes ()); return Crc32.getvalue ();} /** * Redis inserts an object into a different library based on the key value * * @param key * @param insertobj * @param jedisgroup */public static void InsertObject (String key, Object insertobj, String jedisgroup) {Jedis Jedis = Getjedis (key, Jedisgroup, Insert_operat ION); Gson Gson = new Gson () Jedis.set (Key, Gson.tojson (Insertobj)); Closejedis (Jedis);} /** * Redis inserts objects into different libraries based on key values * * @param key * @param insertobj * @param jedisgroup * @param expire */public static void I Nsertobject (String key, Object insertobj, string jedisgroup, int expireseconds) {Jedis Jedis = Getjedis (key, Jedisgroup, I Nsert_operation); Gson Gson = new Gson () Jedis.setex (Key, Expireseconds, Gson.tojson (insertobj)); Closejedis (Jedis);} /** * Publicdata Redis Inserts an object into a different library based on the key value * * @param key * @param insertobj * @param jedisgroup */public static void Insert Publicdataobject (String key, Object insertobj, String selectdb) {Jedis Jedis = Getpublicdatajedis (key, Insert_operation, SELECTDB); Gson Gson = new Gson () Jedis.set (Key, Gson.tojson (Insertobj)); Closejedis (Jedis);} /** * Publicdata Redis Inserts an object into a different library based on the key value, * * @param key * @param insertobj * @param jedisgroup * @param expireseconds */public static void Insertpublicdataobject (String key, Object insertobj, string selectdb, int ExpireS Econds) {Jedis Jedis = Getpublicdatajedis (key, Insert_operation, SELECTDB); Gson Gson = new Gson () Jedis.setex (Key, Expireseconds, Gson.tojson (insertobj)); Closejedis (Jedis);} /** * Update the timeout period for key in Redis * * @param key * @param jedisgroup * @param expireseconds */public static void Resetexpireseconds (S Tring Key, String jedisgroup, int expireseconds) {Jedis Jedis = Getjedis (key, Jedisgroup, get_operation); Jedis.expire (key , expireseconds); Closejedis (Jedis);}}

5, the required jar package

Java Operating Redis DB instance (Redis cluster)