org.apache.geode.cache.snapshot

## Interface SnapshotOptions<K,V>

- Type Parameters:
    `K` - the cache entry key type
    `V` - the cache entry value type
  All Superinterfaces:
    java.io.Serializable

      public interface SnapshotOptions<K,V>
      extends java.io.Serializable

  Provides a way to configure the behavior of snapshot operations. The default options are:
  filter
    null
  Since:
    GemFire 7.0

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Interface and Description
    --- | ---
    `static class` | `SnapshotOptions.SnapshotFormat` Defines the available snapshot file formats.

  - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `SnapshotFilter<K,V>` | `getFilter()` Returns the filter to be applied to snapshot entries.
    `SnapshotOptions<K,V>` | `invokeCallbacks(boolean invokeCallbacks)` Sets whether to invoke callbacks when loading a snapshot.
    `boolean` | `isParallelMode()` Returns true if the snapshot operation will proceed in parallel.
    `SnapshotOptions<K,V>` | `setFilter(SnapshotFilter<K,V> filter)` Sets a filter to apply to snapshot entries.
    `SnapshotOptions<K,V>` | `setParallelMode(boolean parallel)` Enables parallel mode for snapshot export, which will cause each member of a partitioned region to save its local data set (ignoring redundant copies) to a separate snapshot file.
    `boolean` | `shouldInvokeCallbacks()` Returns whether loading a snapshot causes callbacks to be invoked

- - ### Method Detail

    - #### setFilter

          SnapshotOptions<K,V> setFilter(SnapshotFilter<K,V> filter)

      Sets a filter to apply to snapshot entries. Entries that are accepted by the filter will be included in import and export operations.
      Parameters:
        `filter` - the filter to apply, or null to remove the filter
      Returns:
        the snapshot options

    - #### getFilter

          SnapshotFilter<K,V> getFilter()

      Returns the filter to be applied to snapshot entries. Entries that are accepted by the filter will be included in import and export operations.
      Returns:
        the filter, or null if the filter is not set

    - #### invokeCallbacks

          SnapshotOptions<K,V> invokeCallbacks(boolean invokeCallbacks)

      Sets whether to invoke callbacks when loading a snapshot. The default is false.
      Parameters:
        `invokeCallbacks` -
      Returns:
        the snapshot options

    - #### shouldInvokeCallbacks

          boolean shouldInvokeCallbacks()

      Returns whether loading a snapshot causes callbacks to be invoked
      Returns:
        whether loading a snapshot causes callbacks to be invoked

    - #### isParallelMode

          boolean isParallelMode()

      Returns true if the snapshot operation will proceed in parallel.
      Returns:
        true if the parallel mode has been enabled
      Since:
        Geode 1.3

    - #### setParallelMode

          SnapshotOptions<K,V> setParallelMode(boolean parallel)

      Enables parallel mode for snapshot export, which will cause each member of a partitioned region to save its local data set (ignoring redundant copies) to a separate snapshot file.

      Parallelizing snapshot operations may yield significant performance improvements for large data sets. This is particularly true when each member is writing to separate physical disks.

      This flag is ignored for replicated regions.

      Parameters:
        `parallel` - true if the snapshot operations will be performed in parallel
      Returns:
        the snapshot options
      Since:
        Geode 1.3
      See Also:
        `SnapshotFileMapper`