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Underlying protocol and Java implementation are inherently asynchronous, so any thin client API can have an async equivalent.

Description

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APIs

Provide async equivalents for all Java Thin Client APIs where possible:

• IgniteClient
• ClientCacheTODO
• ClientCluster, ClientClusterGroup
• ClientCompute (already has executeAsync, but may need improvement - see below)
• ClientTransaction, ClientTransactions

Futures

Async APIs should return IgniteFuture for consistency with other Ignite APIs.

ClientCompute#executeAsync returns plain j.u.c.Future, which does not provide completion callbacks or chaining, this should be changed (deprecate old method and create a new one).

Future Completion Thread

Risks and Assumptions

// Describe project risks, such as API or binary compatibility issues, major protocol changes, etc.

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