CODEWITHSUNDEEP
javaignite
Mulgard
Mulgard

Reputation: 10569

Prevent ignite from updating the cache when calling a setter

I have an ignite cache version 2.2.0 with the following configuration:

final CacheConfiguration<String, Product> cacheConfiguration = new CacheConfiguration<>("products");

cacheConfiguration.setName("products");
cacheConfiguration.setIndexedTypes(String.class, Product.class);
cacheConfiguration.setAtomicityMode(CacheAtomicityMode.TRANSACTIONAL);
cacheConfiguration.setCacheStoreFactory(new FactoryBuilder.SingletonFactory<>( new ProductCacheStoreAdapter()));
cacheConfiguration.setCopyOnRead(false);
cacheConfiguration.setCacheMode(CacheMode.PARTITIONED);
cacheConfiguration.setOnheapCacheEnabled(true);

return cacheConfiguration;

The product has the following fields:

String id;
String brand;
ProductInfos infos;

When I now select a product from the cache:

log.info("product: ") + igniteCache.get("12345");

I get the following:

product: 12345, beats, null

Now I do the following:

product.setProductInfos(new ProductInfos(.......));
log.info("product: ") + igniteCache.get("12345");

And I get the following:

product: 12345, beats, {....}

So that means that by setting the product infos on the product object the cache automatically got updated.

How can I prevent that?

EDIT

setting copyOnRead to be true fixes this issue. but is that the way to go?

Upvotes: 0

Views: 174

Answers (1)

Denis Mekhanikov
Denis Mekhanikov

Reputation: 3591

You get this effect because of a combination of enabled on-heap cache and disabled copyOnRead.

It means, that values are stored on heap and not copied, when inserted to and read from the cache. copyOnRead should be disabled only when you don't change values, that are also stored in cache.

Upvotes: 4

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