Maintaining insertion order

[kovica1]

Hi!

I'm using Infinispan 5.0.1. and I want that I get values from the cache in the same order as I put them in.

For example:

Cache<String, String> myCache = defaultCacheManager.getCache("myCache");
myCache.put("1", "ONE");
myCache.put("2", "TWO");
myCache.put("3", "THREE");
myCache.keySet();
Set<String> keySet = myCache.keySet();
for (String key : keySet) {
    System.out.println(myCache.get(key));
}

This should print out:

ONE

TWO

THREE

Similar to LinkedHashMap in Java. How do I do it?

Best regards,

    Kovi

[vblagojevic]

Hey,

keySet() operation does not have in its API contract an obligation to return set items in insertion order.

Regards,

Vladimir

[kovica1]

Hi!

Yes, that is correct.

It's just that I'm using Infinispan for all my other projects and I wanted to use it also for this one.

Because in this one I need just that, insertion order. LinkedHashMap provides it, so I found a ConcurrentLinkedHashMap on Google code, which is perfect for my needs.

The main Infinispan interface, org.infinispan.Cache, extends ConcurrentMap, which does not support insertion order, right?

Is there a way to make Infinispan use my cache implementation based on LinkedHAshMAp, not ConcurrentMap?

Best regards,

    Kovi

[vblagojevic]

Hey, unfortunately not. We do not support it now and I doubt it will be supported any time soon. If I was in your position I would go for plan B :-)

Cheers,

Vladimir

[kovica1]

Hi!

Yes, I did do that.

Thanks for your help.

Best regards,

    Kovi