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discard large deltas, #23025

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* to avoid OversizedPayloadException
* some complex deltas grow for each update operation, e.g.
  when updating different keys in ORMap (PNCounterMap)
* such large deltas can safely be discarded and disseminated as full
  state instead
* added ReplicatedDeltaSize interface to be able to define the "size"
  and when that size exceeds configured threshold the delta is discarded
This commit is contained in:
Patrik Nordwall 2017-05-30 12:09:56 +02:00
parent 5641c12547
commit 2970287f95
9 changed files with 117 additions and 13 deletions
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8
akka-distributed-data/src/main/scala/akka/cluster/ddata/ORSet.scala
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@ -45,9 +45,10 @@ object ORSet {
/**
* INTERNAL API
*/
@InternalApi private[akka] sealed abstract class AtomicDeltaOp[A] extends DeltaOp {
@InternalApi private[akka] sealed abstract class AtomicDeltaOp[A] extends DeltaOp with ReplicatedDeltaSize {
def underlying: ORSet[A]
override def zero: ORSet[A] = ORSet.empty
override def deltaSize: Int = 1
}
/** INTERNAL API */
@ -94,7 +95,8 @@ object ORSet {
/**
* INTERNAL API
*/
@InternalApi private[akka] final case class DeltaGroup[A](ops: immutable.IndexedSeq[DeltaOp]) extends DeltaOp {
@InternalApi private[akka] final case class DeltaGroup[A](ops: immutable.IndexedSeq[DeltaOp])
extends DeltaOp with ReplicatedDeltaSize {
override def merge(that: DeltaOp): DeltaOp = that match {
case thatAdd: AddDeltaOp[A] ⇒
// merge AddDeltaOp into last AddDeltaOp in the group, if possible
@ -107,6 +109,8 @@ object ORSet {
}
override def zero: ORSet[A] = ORSet.empty
override def deltaSize: Int = ops.size
}
/**