How to connect Vertx RedisClient in cluster mode with Elasticache - vert.x

Question

I am using Vertx Redis client from the package io.vertx.rxjava.redis.RedisClient to connect to Elasticache Redis.
It does connect but shows an error,
io.vertx.redis.client.impl.types.ErrorType: MOVED 4985 xxx.xxx.xxx.xxx:63791
After reading about the error I found its because there are sharding and its not able to connect to all of them.
From the library, I am not able to figure what method to use to connect in cluster mode.

Answer 1

Here is an example how to connect and send get command in cluster mode.
Define options:
final RedisOptions options = new RedisOptions()
.setType(RedisClientType.CLUSTER)
.setUseSlave(RedisSlaves.SHARE)
.setMaxWaitingHandlers(128 * 1024)
.addEndpoint("redis://127.0.0.1:7000")
.addEndpoint("redis://127.0.0.1:7001")
.addEndpoint("redis://127.0.0.1:7002")
.addEndpoint("redis://127.0.0.1:7003")
.addEndpoint("redis://127.0.0.1:7004")
.addEndpoint("redis://127.0.0.1:7005");
Connect and send command:
Redis.createClient(vertx, options).connect(onCreate -> {
final Redis cluster = onCreate.result();
cluster.send(cmd(SET).arg("key"), set -> {
System.out.println(set.result());
});
});
Tip: If you are unsure how use some library or documentation is not clear enough you can always checkout Tests if that projects has them. You can check how they are implemented so you can use examples from there.