Data Store Locking
When a pub.storage service locks an entry, the service also implicitly locks the data store in which the entry resides. This behavior prevents another thread from deleting the entire data store and the entries it contains while your thread is working with the entry. When the locked entry is unlocked, the implicit lock on the data store is also released.
Be careful when explicitly unlocking data stores. Consider the following example:
1. User_A locks an item. This creates two locks: an explicit lock on the entry, and an implicit lock on the data store.
2. User_A later unlocks the data store explicitly while still holding the lock on the entry.
3. User_B locks, then deletes the data store, including the entry locked by User_A in the first step.
When User_A explicitly unlocked the data store in step 2, User_B was able to delete the entry the User_A was working with.
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