Quote: global methods in Guava might acquire a lock; maybe not idempotent; if also update, can not use from read methods

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These checking rules guarantee that any method or … assumed to be idempotent, and methods that are … a local read method is guaranteed to be … depends on the parameters passed to it, and … same result. [footnote] Because of non-determinism (e.g., allocating … however, it is always correct for a compiler …   Google-1   Google-2

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Quote: local read methods in Guava are idempotent unless they return a new value; can replace multiple calls with a single call

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Topic: safe use of pointers (102 items)