Use this when you have written JUST BEFORE the store.
Services and Stores are very similar, but not exact.
This is a service that has a finite memory.
The Platform recursively passes this input around to describe a step forward: requested input time span, and scalding Mode
These are printed/logged only when we can't make any progress
When it is time to run build the final flow, this is what scalding needs.
When it is time to run build the final flow, this is what scalding needs. It is modified in the Reader[FlowInput, T]
Puts a type on the final exception thrown by the scalding Planner
This is a function that modifies a flow to return T generally T will be some kind of TypedPipe
We so commonly talk about producing TimedPipe we define this
For (firstNonZero - 1) we read empty.
We are usually producing Pipes in the Planner
The recursive planner produces these objects which are Monads
A UniqueKeyedService covers the case where Keys are globally unique and either are not present or have one value.
More familiar interface to scalding users that creates the Reader from two other methods
We represent time as Long Millis
How we represent the streams in scalding
A UniqueKeyedService covers the case where Keys are globally unique and either are not present or have one value.
Allows subclasses to share the means of reading version numbers but plug in methods to actually read or write the data.
Job state models the memory of when the next job should try to cover
Use this option to write the logical graph that cascading produces before Map/Reduce planning.
Use this option to write map/reduce graph that cascading produces Use the job name as the key
lookupJoin simulates the behavior of a realtime system attempting to leftJoin (K, V) pairs against some other value type (JoinedV) by performing realtime lookups on a key-value Store.
Scalding implementation of the batch read and write components of a store that uses the VersionedKeyValSource from scalding-commons.