CODEWITHSUNDEEP
javacachingoracle-coherence
Miguel Ping
Miguel Ping

Reputation: 18347

Can Tangosol Coherence cache non-serializable objects?

I'm using Tangosol Coherence v3.2.2b371. Can I cache objects that do not implement Serializable through the NamedCache api? Or this depends on configuration?

Edit: For clarification, I'm trying to cache compiled javax.xml.xpath.XPathExpression objects.

Upvotes: 4

Views: 2567

Answers (4)

David G
David G

Reputation: 6317

To store an object in the cache it must be serializable but does not have to implement Serializable. Specifically, it can use POF which is more efficient in time and memory than Serializable.

POF does require some additional configuration, which is described in the article I linked to.

Upvotes: 3

cpurdy
cpurdy

Reputation: 1236

It depends on configuration. If you need to store objects that don't support serialization, you need to have a com.tangosol.io.Serializer implementation that can do the serialization on behalf of the non-serializable objects. You may find that for common cases, this is already supported by e.g. a PofSerializer.

Upvotes: 1

Robert Varga
Robert Varga

Reputation: 11

Coherence can cache non-Serializable but POF-aware (either PortableObject or one having a registered PofSerializer) objects starting with 3.4.

Before that POF (or any other custom Serializer for that matter) was not usable as a storage (within the backing map) and tranport format within the cluster (on the TCMP protocol), it was only used as a transport protocol in TCP*Extend.

Upvotes: 1

omerkudat
omerkudat

Reputation: 10101

I'm guessing (just guessing) that the answer is "no". However, do take a look at the PortableObject interface. This is supposed to be an alternative to java.io.Serializable, but for performance reasons. You should check whether it can be used to replace Serializable interface.

PortableObject JavaDoc

Upvotes: 1

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