Package org.apache.geode.cache.query

Interface Aggregator

  • public interface Aggregator
    Behavior of a user-defined aggregator. Aggregates values and returns a result. In addition to the methods in the interface, implementing classes must have a 0-arg public constructor.

    • Method Detail

      • init

        void init()
        Initialize the Aggregator

      • accumulate

        void accumulate​(Object value)
        Accumulate the next scalar value
        Parameters:
        value - the scalar value to accumulate

      • terminate

        Object terminate()
        Finish the aggregation and return the operation result.
        Returns:
        Return the result scalar value