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16 lines
880 B
Go
16 lines
880 B
Go
package context
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// Loader fetches or produces data and loads it into the context. A loader is created for each
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// context entry (e.g. `context.variable`, `context.apiCall`, etc.)
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// Loaders are invoked lazily based on variable lookups. Loaders may be invoked multiple times to
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// handle checkpoints and restores that occur when processing loops. A loader that fetches remote
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// data should be able to handle multiple invocations in an optimal manner by mantaining internal
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// state and caching remote data. For example, if an API call is made the data retrieved can be
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// stored so that it can be saved in the outer context when a restore is performed.
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type Loader interface {
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// Load data fetches or produces data and stores it in the context
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LoadData() error
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// Has loaded indicates if the loader has previously
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// executed and stored data in a context
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HasLoaded() bool
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}
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