Hazelcast with springboot - spring-boot

Question

I was looking into hazelcast and found some good integrations with springboot. However, I want to understand if that is it or if we need the hazelcast servers to make a prod ready implementation. Can some one point out a resouce where I can look at the setup

Answer 1

You can run Hazelcast in either an embedded mode -- where the Hazelcast cluster nodes are colocated with the application clients -- or in a client-server mode, where the Hazelcast cluster is separate from the application clients. Both can be used for production. Embedded is generally easier to get up and running quickly. Client-Server might be better if you want to be able to tune and scale the cluster independently of the application clients.
See https://support.hazelcast.com/hc/en-us/articles/115004441586-What-s-the-difference-between-client-server-vs-embedded-topologies-
The only change in application code to switch between architectures is the line of code that instantiates the client
Hazelcast.newHazelcastInstance(); // creates an embedded client instance
while
Hazelcast.newHazelcastClient(); // creates a server client instance
I'd recommend the reference manual as the definitive source on configuration options and how to achieve what you need
https://docs.hazelcast.org/docs/latest/manual/html-single/

Answer 2

I would recommend to go through the reference manual. But I would also like to share how I have deployed the hazelcast instances on production servers and how I have used it.
Step 1: Create a xml config file.
<?xml version="1.0" encoding="UTF-8"?>
<hazelcast
xsi:schemaLocation="http://www.hazelcast.com/schema/config https://hazelcast.com/schema/config/hazelcast-config-3.9.xsd"
xmlns="http://www.hazelcast.com/schema/config"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<group>
<name>"your_service_name"</name>
<password>"service_password_chosen"</password>
</group>
<properties>
<property name="hazelcast.partition.count">83</property>
</properties>
<management-center enabled="true" update-interval="3">--url--</management-center>
<network>
<join>
<multicast enabled="false"/>
<aws enabled="false"></aws>
<tcp-ip enabled="true">
<member>"internal ip of your instance"</member>
<member>"internal ip of other instance</member>
</tcp-ip>
</join>
</network>
<map name="*.ttl3hr">
<max-size policy="USED_HEAP_PERCENTAGE">3</max-size>
<eviction-policy>LFU</eviction-policy>
<statistics-enabled>true</statistics-enabled>
<backup-count>0</backup-count>
<async-backup-count>1</async-backup-count>
<read-backup-data>true</read-backup-data>
<time-to-live-seconds>10800</time-to-live-seconds> <!--3 hours-->
</map>
Step 2: Add #EnableCaching and add a bean in the file annotated with #Configuration.
#Bean
public CacheManager cacheManager(HazelcastInstance hazelcastInstance) {
return new com.hazelcast.spring.cache.HazelcastCacheManager(hazelcastInstance);
}
Step 3: Then you can annotate your methods with #Cacheable annotation.
#Cacheable(cacheNames = "your_cache_name")
public POJO foo(Parameter1 parameter1,
Parameter2 parameter2) {
return pojoRepository.findByParameters(parameter1, parameter2);
}