trait PNCounter extends Crdt

A Positive-Negative Counter.

A Positive-Negative Counter is a counter that allows both incrementing, and decrementing. It is based on two GCounter's, a positive one that is incremented for every increment, and a negative one that is incremented for every decrement. The current value of the counter is calculated by subtracting the negative counter from the positive counter.

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Abstract Value Members

  1. abstract def decrement(by: Long): Long

    Decrement the counter.

    Decrement the counter.

    If by is negative, then the counter will be incremented by that much instead.

    by

    The amount to decrement the counter by.

    returns

    The new value of the counter.

  2. abstract def getValue(): Long

    Get the current value of the counter.

    Get the current value of the counter.

    returns

    The current value of the counter.

  3. abstract def increment(by: Long): Long

    Increment the counter.

    Increment the counter.

    If by is negative, then the counter will be decremented by that much instead.

    by

    The amount to increment the counter by.

    returns

    The new value of the counter.

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