org.apache.ignite.platform.dotnet

## Class PlatformDotNetAffinityFunction

- java.lang.Object
- - org.apache.ignite.platform.dotnet.PlatformDotNetAffinityFunction

- All Implemented Interfaces:
    Externalizable, Serializable, AffinityFunction, LifecycleAware

      public class PlatformDotNetAffinityFunction
      extends Object
      implements AffinityFunction, Externalizable, LifecycleAware

  AffinityFunction implementation which can be used to configure .NET affinity function in Java Spring configuration.
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `PlatformDotNetAffinityFunction()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `List<List<ClusterNode>>` | `assignPartitions(AffinityFunctionContext affCtx)` Gets affinity nodes for a partition.
    `org.apache.ignite.internal.processors.platform.cache.affinity.PlatformAffinityFunction` | `getFunc()` Gets the inner func.
    `Map<String,?>` | `getProperties()` Get properties.
    `String` | `getTypeName()` Gets .NET type name.
    `void` | `init(org.apache.ignite.internal.processors.platform.cache.affinity.PlatformAffinityFunction func)` Initializes this instance.
    `int` | `partition(Object key)` Gets partition number for a given key starting from `0`.
    `int` | `partitions()` Gets total number of partitions available.
    `void` | `readExternal(ObjectInput in)`
    `void` | `removeNode(UUID nodeId)` Removes node from affinity.
    `void` | `reset()` Resets cache affinity to its initial state.
    `PlatformDotNetAffinityFunction` | `setProperties(Map<String,?> props)` Set properties.
    `PlatformDotNetAffinityFunction` | `setTypeName(String typName)` Sets .NET type name.
    `void` | `start()` Starts grid component, called on grid start.
    `void` | `stop()` Stops grid component, called on grid shutdown.
    `void` | `writeExternal(ObjectOutput out)`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### PlatformDotNetAffinityFunction

          public PlatformDotNetAffinityFunction()

  - ### Method Detail

    - #### getTypeName

          public String getTypeName()

      Gets .NET type name.
      Returns:
        .NET type name.

    - #### setTypeName

          public PlatformDotNetAffinityFunction setTypeName(String typName)

      Sets .NET type name.
      Parameters:
        `typName` - .NET type name.
      Returns:
        `this` for chaining.

    - #### getProperties

          public Map<String,?> getProperties()

      Get properties.
      Returns:
        Properties.

    - #### setProperties

          public PlatformDotNetAffinityFunction setProperties(Map<String,?> props)

      Set properties.
      Parameters:
        `props` - Properties.
      Returns:
        `this` for chaining.

    - #### reset

          public void reset()

      Resets cache affinity to its initial state. This method will be called by the system any time the affinity has been sent to remote node where it has to be reinitialized. If your implementation of affinity function has no initialization logic, leave this method empty.
      Specified by:
        `reset` in interface `AffinityFunction`

    - #### partitions

          public int partitions()

      Gets total number of partitions available. All caches should always provide correct partition count which should be the same on all participating nodes. Note that partitions should always be numbered from `0` inclusively to `N` exclusively without any gaps.
      Specified by:
        `partitions` in interface `AffinityFunction`
      Returns:
        Total partition count.

    - #### partition

          public int partition(Object key)

      Gets partition number for a given key starting from `0`. Partitioned caches should make sure that keys are about evenly distributed across all partitions from `0` to `partition count` for best performance.

      Note that for fully replicated caches it is possible to segment key sets among different grid node groups. In that case each node group should return a unique partition number. However, unlike partitioned cache, mappings of keys to nodes in replicated caches are constant and a node cannot migrate from one partition to another.

      Specified by:
        `partition` in interface `AffinityFunction`
      Parameters:
        `key` - Key to get partition for.
      Returns:
        Partition number for a given key.

    - #### assignPartitions

          public List<List<ClusterNode>> assignPartitions(AffinityFunctionContext affCtx)

      Gets affinity nodes for a partition. In case of replicated cache, all returned nodes are updated in the same manner. In case of partitioned cache, the returned list should contain only the primary and back up nodes with primary node being always first.

      Note that partitioned affinity must obey the following contract: given that node `N` is primary for some key `K`, if any other node(s) leave grid and no node joins grid, node `N` will remain primary for key `K`.

      Specified by:
        `assignPartitions` in interface `AffinityFunction`
      Parameters:
        `affCtx` - Affinity function context. Will provide all required information to calculate new partition assignments.
      Returns:
        Unmodifiable list indexed by partition number. Each element of array is a collection in which first node is a primary node and other nodes are backup nodes.

    - #### removeNode

          public void removeNode(UUID nodeId)

      Removes node from affinity. This method is called when it is safe to remove left node from affinity mapping.
      Specified by:
        `removeNode` in interface `AffinityFunction`
      Parameters:
        `nodeId` - ID of node to remove.

    - #### writeExternal

          public void writeExternal(ObjectOutput out)
                             throws IOException

      Specified by:
        `writeExternal` in interface `Externalizable`
      Throws:
        `IOException`

    - #### readExternal

          public void readExternal(ObjectInput in)
                            throws IOException,
                                   ClassNotFoundException

      Specified by:
        `readExternal` in interface `Externalizable`
      Throws:
        `IOException`
        `ClassNotFoundException`

    - #### init

          public void init(org.apache.ignite.internal.processors.platform.cache.affinity.PlatformAffinityFunction func)

      Initializes this instance.
      Parameters:
        `func` - Underlying func.

    - #### start

          public void start()
                     throws IgniteException

      Starts grid component, called on grid start.
      Specified by:
        `start` in interface `LifecycleAware`
      Throws:
        `IgniteException` - If failed.

    - #### stop

          public void stop()
                    throws IgniteException

      Stops grid component, called on grid shutdown.
      Specified by:
        `stop` in interface `LifecycleAware`
      Throws:
        `IgniteException` - If failed.

    - #### getFunc

          public org.apache.ignite.internal.processors.platform.cache.affinity.PlatformAffinityFunction getFunc()

      Gets the inner func.
      Returns:
        The inner func.

2021 Copyright © Apache Software Foundation
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Ignite Database and Caching Platform | : ver. 2.10.0
Release Date | : March 10 2021