Steven Barclay 91fa07343c Add UserThreadMappedPersistableEnvelope for greater explicitness ... Make the default toPersistableMessage() method of PersistableEnvelope simply delegate to Proto.toProtoMessage for speed, so that stores can explicitly implement (Threaded|UserThreadMapped)PersistableEnvelope if they actually need concurrency control. As part of this, make PeerList implement PersistableEnvelope directly instead of extending PersistableList, as it is non-critical & cloned on the user thread prior to storage anyway, so doesn't need be thread-safe. In this way, only PaymentAccountList & small DAO-related stores extend PersistableList, so they can all be made user-thread-mapped. After this change, the only concrete store classes not implementing (Threaded|UserThreadMapped)PersistableEnvelope are: AccountAgeWitness, BlindVotePayload, ProposalPayload, SignedWitness, TradeStatistics2, NavigationPath & PeerList The first five appear to erroneously implement PersistableEnvelope and can be cleaned up in a separate commit. The last two are non-critical. (Make NavigationPath.path an immutable list, for slightly better thread safety anyway - that way it will never be observed half-constructed.)		2020-03-10 12:05:33 +08:00
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src	Add UserThreadMappedPersistableEnvelope for greater explicitness	2020-03-10 12:05:33 +08:00