Package org.apache.flink.streaming.api.transformations

Class CacheTransformation<T>

  • Type Parameters:
    T - The type of the elements in the cache intermediate result.
    @Internal
public class CacheTransformation<T>
extends org.apache.flink.api.dag.Transformation<T>
    When in batch mode, the CacheTransformation represents the intermediate result of the upper stream should be cached when it is computed at the first time. And it consumes the cached intermediate result in later jobs. In stream mode, it has no affect.

    • Field Summary

      • Fields inherited from class org.apache.flink.api.dag.Transformation

        bufferTimeout, description, id, name, outputType, typeUsed, UPPER_BOUND_MAX_PARALLELISM

    • Constructor Summary

      Constructors 
      Constructor Description
      CacheTransformation​(org.apache.flink.api.dag.Transformation<T> transformationToCache, String name)
      Creates a new Transformation with the given name, output type and parallelism.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      org.apache.flink.util.AbstractID getDatasetId()  
      List<org.apache.flink.api.dag.Transformation<?>> getInputs()  
      org.apache.flink.api.dag.Transformation<T> getTransformationToCache()  
      protected List<org.apache.flink.api.dag.Transformation<?>> getTransitivePredecessorsInternal()  
      boolean isCached()  
      void setCached​(boolean cached)  

      • Methods inherited from class org.apache.flink.api.dag.Transformation

        declareManagedMemoryUseCaseAtOperatorScope, declareManagedMemoryUseCaseAtSlotScope, enableAsyncState, equals, getAttribute, getBufferTimeout, getCoLocationGroupKey, getDescription, getId, getManagedMemoryOperatorScopeUseCaseWeights, getManagedMemorySlotScopeUseCases, getMaxParallelism, getMinResources, getName, getNewNodeId, getOutputType, getParallelism, getPreferredResources, getSlotSharingGroup, getTransitivePredecessors, getUid, getUserProvidedNodeHash, hashCode, isParallelismConfigured, setAttribute, setBufferTimeout, setCoLocationGroupKey, setDescription, setMaxParallelism, setName, setOutputType, setParallelism, setParallelism, setResources, setSlotSharingGroup, setSlotSharingGroup, setUid, setUidHash, toString, updateManagedMemoryStateBackendUseCase

    • Constructor Detail

      • CacheTransformation

        public CacheTransformation​(org.apache.flink.api.dag.Transformation<T> transformationToCache,
                           String name)
        Creates a new Transformation with the given name, output type and parallelism.
        Parameters:
        name - The name of the Transformation, this will be shown in Visualizations and the Log

    • Method Detail

      • getTransitivePredecessorsInternal

        protected List<org.apache.flink.api.dag.Transformation<?>> getTransitivePredecessorsInternal()
        Specified by:
        getTransitivePredecessorsInternal in class org.apache.flink.api.dag.Transformation<T>

      • getInputs

        public List<org.apache.flink.api.dag.Transformation<?>> getInputs()
        Specified by:
        getInputs in class org.apache.flink.api.dag.Transformation<T>

      • getDatasetId

        public org.apache.flink.util.AbstractID getDatasetId()

      • getTransformationToCache

        public org.apache.flink.api.dag.Transformation<T> getTransformationToCache()

      • setCached

        public void setCached​(boolean cached)

      • isCached

        public boolean isCached()