Re: Best way to track if key was read more than X times?

[akorensh]

Hi,

You can use Events:https://apacheignite.readme.io/docs/events
In Particular: EVT_CACHE_OBJECT_READ
see:
https://github.com/apache/ignite/blob/master/examples/src/main/java/org/apache/ignite/examples/events/EventsExample.java



Here is an example: (modified localListen() fn in the above example)
 private static void localListen() throws IgniteException,
InterruptedException {
        System.out.println(">>> Local event listener example.");

        Ignite ignite = Ignition.ignite();

        IgnitePredicate<CacheEvent> lsnr = evt -> {
            System.out.println("Received task event [evt=" + evt.name() + ",
keyName=" + evt.key() + ']');

            return true; // Return true to continue listening.
        };

        ignite.events().localListen(lsnr, EVT_CACHE_OBJECT_READ);

        ignite.getOrCreateCache("test").put("a", "a");
        ignite.getOrCreateCache("test").put("b", "b");

        for (int i = 0; i < 100 ; i++) {
            if(i %2 ==0 ) ignite.getOrCreateCache("test").get("a");
            else ignite.getOrCreateCache("test").get("b");
            Thread.sleep(1000);
            System.out.println("sleeping..");
        }

        // Unsubscribe local task event listener.
        ignite.events().stopLocalListen(lsnr);
    }


You can also use continuous queries to listen for updates:
https://apacheignite.readme.io/docs/continuous-queries  for updates/inserts 







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