kalix.scalasdk.replicatedentity.ReplicatedCounterMap.scala Maven / Gradle / Ivy
/*
* Copyright 2021 Lightbend Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package kalix.scalasdk.replicatedentity
import scala.collection.immutable.Set
import kalix.javasdk.impl.replicatedentity.ReplicatedCounterMapImpl
import kalix.protocol.replicated_entity.ReplicatedEntityDelta
/**
* A Map of counters. Uses [[ReplicatedCounter]] 's as values.
*
* @tparam K
* The type for keys.
*/
class ReplicatedCounterMap[K] private[scalasdk] (override val delegate: ReplicatedCounterMapImpl[K])
extends InternalReplicatedData {
/**
* Optionally returns the value associated with a key.
*
* @param key
* the key value
* @return
* an option value containing the value associated with `key` in this map, or `None` if none exists.
*/
def get(key: K): Option[Long] = delegate.getOption(key)
/**
* Get the counter value for the given key.
*
* @param key
* the key to get the value for
* @return
* the current value of the counter at that key, or zero if no counter exists
*/
def apply(key: K): Long = delegate.get(key)
/**
* Increment the counter at the given key by the given amount.
*
* The counter will be created if it is not already in the map.
*
* @param key
* the key of the counter
* @param amount
* the amount to increment by
* @return
* a new counter map with the incremented value
*/
def increment(key: K, amount: Long): ReplicatedCounterMap[K] =
new ReplicatedCounterMap(delegate.increment(key, amount))
/**
* Decrement the counter at the given key by the given amount.
*
*
The counter will be created if it is not already in the map.
*
* @param key
* the key of the counter
* @param amount
* the amount to decrement by
* @return
* a new counter map with the decremented value
*/
def decrement(key: K, amount: Long): ReplicatedCounterMap[K] =
new ReplicatedCounterMap(delegate.decrement(key, amount))
/**
* Remove the mapping for a key if it is present.
*
* @param key
* key whose mapping is to be removed from the map
* @return
* a new counter map with the removed mapping
*/
def remove(key: K): ReplicatedCounterMap[K] =
new ReplicatedCounterMap(delegate.remove(key))
/**
* Remove all mappings from this counter map.
*
* @return
* a new empty counter map
*/
def clear(): ReplicatedCounterMap[K] =
new ReplicatedCounterMap(delegate.clear())
/**
* Get the number of key-counter mappings in this counter map.
*
* @return
* the number of key-counter mappings in this counter map
*/
def size: Int = delegate.size
/**
* Check whether this counter map is empty.
*
* @return
* `true` if this counter map contains no key-counter mappings
*/
def isEmpty: Boolean = delegate.isEmpty
/**
* Check whether this counter map contains a mapping for the given key.
*
* @param key
* key whose presence in this map is to be tested
* @return
* `true` if this counter map contains a mapping for the given key
*/
def contains(key: K): Boolean = delegate.containsKey(key)
/**
* Tests whether a predicate holds for all elements of this ReplicatedCounterMap.
*
* @param predicate
* the predicate used to test elements.
* @return
* `true` if this ReplicatedCounterMap is empty or the given predicate `pred` holds for all elements of this
* ReplicatedCounterMap, otherwise `false`.
*/
def forall(predicate: ((K, Long)) => Boolean): Boolean =
delegate.forall(predicate)
/**
* Get a [[Set]] view of the keys contained in this counter map.
*
* @return
* the keys contained in this counter map
*/
def keySet: Set[K] = delegate.keys
final override type Self = ReplicatedCounterMap[K]
final override def resetDelta(): ReplicatedCounterMap[K] =
new ReplicatedCounterMap(delegate.resetDelta())
final override def applyDelta: PartialFunction[ReplicatedEntityDelta.Delta, ReplicatedCounterMap[K]] =
delegate.applyDelta.andThen(new ReplicatedCounterMap(_))
final override def toString: String = delegate.toString
}