org.apache.storm.localizer

## Interface BlobChangingCallback

- All Known Implementing Classes:
    Slot

      public interface BlobChangingCallback

  Callback for when a localized blob is going to change.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `blobChanging(LocalAssignment assignment, int port, LocallyCachedBlob blob, GoodToGo go)` Informs the listener that a blob has changed and is ready to update and replace a localized blob that has been marked as tied to the life cycle of the worker process.

- - ### Method Detail

    - #### blobChanging

          void blobChanging(LocalAssignment assignment,
                            int port,
                            LocallyCachedBlob blob,
                            GoodToGo go)

      Informs the listener that a blob has changed and is ready to update and replace a localized blob that has been marked as tied to the life cycle of the worker process.

      If `go.getLatch()` is never called before the method completes it is assumed that the listener is good with the blob changing.

      Parameters:
        `assignment` - the assignment this resource and callback are registered with.
        `port` - the port that this resource and callback are registered with.
        `blob` - the blob that is going to change.
        `go` - a way to indicate if the listener is ready for the resource to change.

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