CODEWITHSUNDEEP
hazelcast
Martin Cowie
Martin Cowie

Reputation: 2601

Configuring a two node hazelcast cluster - avoiding multicast

The context

The question

The Hazelcast docs do a good job of showing how this can be achieved programatically, and how hazelcast.jar/hazelcast-default.xml holds the (considerable) default configuration.

What is unclear is: is any XML configuration I supply overlaid upon the settings within hazelcast-default.xml - or simply used in its stead?

Upvotes: 9

Views: 21865

Answers (2)

Martin Cowie
Martin Cowie

Reputation: 2601

I have both my answers, and should like to share them

  1. Just like the programatic API, the XML configuration overlays the defaults found in hazelcast.jar/hazelcast-default.xml, consequently ...

  2. I can establish a very simple two-member cluster with this hazelcast.xml in the classpath

    <hazelcast>
  <network>
    <join>
      <multicast enabled="false"></multicast>
      <tcp-ip enabled="true">
        <member>192.168.100.001</member> <!-- server A -->
        <member>192.168.102.200</member> <!-- server B, on separate subnet -->
      </tcp-ip>
    </join>
  </network>

</hazelcast>

Upvotes: 14

pveentjer
pveentjer

Reputation: 11402

I'm not familiar with hazelcast.conf files.

Mostly used is XML or Programmatic api. For good examples see:

https://github.com/hazelcast/hazelcast-code-samples/tree/master/network-configuration

Example of programmatic:

public class Main {

    public static void main(String[] args){
        Config config = new Config();
        config.getNetworkConfig().getJoin().getTcpIpConfig().addMember("localhost").setEnabled(true);
        config.getNetworkConfig().getJoin().getMulticastConfig().setEnabled(false);
        HazelcastInstance hz = Hazelcast.newHazelcastInstance(config);
    }
}

-- What is unclear is: is any XML configuration I supply overlaid upon the settings within hazelcast-default.xml - or simply used in its stead?

What do you mean? If you use the programmatic API, the rest is not relevant. If you don't provide an explicit Config object while constructing the HazelcastInstance, a defaulting mechanism is used. And eventually it defaults to hazelcast-default.xml.

Upvotes: 5

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