How can I create and test publish/subscribe module using updated Jedis library? Previously I was using jedis library version 3.7.0, from that version my code was something like.
Subscriber Process
import redis.clients.jedis.JedisCluster;import redis.clients.jedis.JedisPubSub;public class ChannelSubscribe { public static void main(String[] args) { JedisCluster jedis = null; try { /* Creating JedisCluster object for connecting with redis-cluster server */ jedis = new JedisCluster(); /* Creating JedisPubSub object for subscribing with channels */ JedisPubSub jedisPubSub = new JedisPubSub() { @Override public void onMessage(String channel, String message) { System.out.println("Channel " + channel +" has sent a message : " + message ); if(channel.equals("C1")) { /* Unsubscribe from channel C1 after first message is received. */ unsubscribe(channel); } } @Override public void onSubscribe(String channel, int subscribedChannels) { System.out.println("Client is Subscribed to channel : "+ channel); System.out.println("Client is Subscribed to "+ subscribedChannels +" no. of channels"); } @Override public void onUnsubscribe(String channel, int subscribedChannels) { System.out.println("Client is Unsubscribed from channel : "+ channel); System.out.println("Client is Subscribed to "+ subscribedChannels +" no. of channels"); } }; /* Subscribing to channel C1 and C2 */ jedis.subscribe(jedisPubSub, "C1", "C2"); } catch(Exception ex) { System.out.println("Exception : " + ex.getMessage()); } }}Publisher Process
import redis.clients.jedis.JedisCluster;public class ChannelPublish { public static void main(String[] args) { JedisCluster jedis = null; try { /* Creating JedisCluster object for connecting with redis server */ jedis = new JedisCluster(); /* Publishing message to channel C1 */ jedis.publish("C1", "First message to channel C1"); /* Publishing message to channel C2 */ jedis.publish("C2", "First message to channel C2"); /* Publishing message to channel C1 */ jedis.publish("C1", "Second message to channel C1"); /* Publishing message to channel C2 */ jedis.publish("C2", "Second message to channel C2"); } catch(Exception ex) { System.out.println("Exception : " + ex.getMessage()); } }}Now I am trying to update jedis library to latest(4.0.1) one. But in this latest library I think the subscribe method has been shifted to JedisPubSub class or I am not sure where.
But now I can't find any working example of pub/sub module for cluster. I have so far tried,
//pool configuration GenericObjectPoolConfig<Connection> poolConfig = new GenericObjectPoolConfig<>(); poolConfig.setMinIdle(5); poolConfig.setMaxIdle(100); poolConfig.setMaxWait(Duration.ofMillis(5000)); //jedis configuration JedisClientConfig jedisClientConfig = DefaultJedisClientConfig.builder() .password(config.getRedisPassword()) .ssl(false) .build(); //host and port HostAndPort hostAndPort = new HostAndPort(config.getRedisHost(), config.getRedisPort()); ConnectionPool connectionPool = new ConnectionPool(hostAndPort, jedisClientConfig, poolConfig); Connection connection = connectionPool.getResource(); //create a jedis pub sub instance JedisPubSub pubSub = new JedisPubSub() { @Override public void onMessage(String channel, String message) { super.onMessage(channel, message); } @Override public void onPMessage(String pattern, String channel, String message) { super.onPMessage(pattern, channel, message); } @Override public void onSubscribe(String channel, int subscribedChannels) { super.onSubscribe(channel, subscribedChannels); } @Override public void onUnsubscribe(String channel, int subscribedChannels) { super.onUnsubscribe(channel, subscribedChannels); } @Override public void onPUnsubscribe(String pattern, int subscribedChannels) { super.onPUnsubscribe(pattern, subscribedChannels); } @Override public void onPSubscribe(String pattern, int subscribedChannels) { super.onPSubscribe(pattern, subscribedChannels); } @Override public void onPong(String pattern) { super.onPong(pattern); } }; pubSub.proceed(connection, "test");But getting error called
redis.clients.jedis.exceptions.JedisConnectionException:java.net.SocketTimeoutException: Read timed out atredis.clients.jedis.util.RedisInputStream.ensureFill(RedisInputStream.java:204)atredis.clients.jedis.util.RedisInputStream.readByte(RedisInputStream.java:42)at redis.clients.jedis.Protocol.process(Protocol.java:126) atredis.clients.jedis.Protocol.read(Protocol.java:192) atredis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:316)atredis.clients.jedis.Connection.getUnflushedObjectMultiBulkReply(Connection.java:282)at redis.clients.jedis.JedisPubSub.process(JedisPubSub.java:131) atredis.clients.jedis.JedisPubSub.proceed(JedisPubSub.java:124) atswitchbalancetest.Test.jedisUpdateTest(Test.java:78) atswitchbalancetest.Test.main(Test.java:40) Caused by:java.net.SocketTimeoutException: Read timed out atjava.net.SocketInputStream.socketRead0(Native Method) atjava.net.SocketInputStream.socketRead(SocketInputStream.java:116) atjava.net.SocketInputStream.read(SocketInputStream.java:171) atjava.net.SocketInputStream.read(SocketInputStream.java:141) atjava.net.SocketInputStream.read(SocketInputStream.java:127) atredis.clients.jedis.util.RedisInputStream.ensureFill(RedisInputStream.java:198)... 9 more
And in redis server log I found error that says,
Bad message length or signature received from Cluster bus.
In current library, I thought subscribe method should be available under UnifiedJedis Class. But, I can't find it there. How can I successfully do this ?