Apache Ignite Quick Start Guide

Grouping by attributes

You can configure a node with specific attributes, similar to passing arguments to a JVM. The Apache Ignite clustering API provides a method to find cluster groups where a specific user-defined attribute is set. Now, launch a node with an attribute, 'FOO', and value, 'BAR', and set it in IgniteConfiguration:

public class NodeAttributeFoo {     public static void main(String[] args) throws InterruptedException {         IgniteConfiguration cfg = new IgniteConfiguration();         cfg.setPeerClassLoadingEnabled(true);         HashMap<String, Object> userAttrb = new HashMap<>();         userAttrb.put("FOO", "BAR");         cfg.setUserAttributes(userAttrb);         try (Ignite ignite = Ignition.start(cfg)) {             while(true) {                 Thread.sleep(1000);             }         }     }}

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