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30 changes: 30 additions & 0 deletions
30
storehaus-algebra/src/main/scala/com/twitter/storehaus/algebra/HHFilteredStore.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| /* | ||
| * Copyright 2013 Twitter 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 com.twitter.storehaus.algebra | ||
|
|
||
| import com.twitter.storehaus.{Store, EagerWriteThroughCacheStore } | ||
| import com.twitter.storehaus.cache.MutableCache | ||
| import com.twitter.util.Future | ||
| import com.twitter.storehaus.cache.{MutableCache, HeavyHittersPercent, WriteOperationUpdateFrequency, RollOverFrequencyMS, HHFilteredCache} | ||
|
|
||
| object HHFilteredStore { | ||
| def buildStore[K, V](store: Store[K, V], cache: MutableCache[K, Future[Option[V]]], hhPct: HeavyHittersPercent, | ||
| writeUpdateFreq: WriteOperationUpdateFrequency, rolloverFreq: RollOverFrequencyMS): Store[K, V] = { | ||
| val filteredCacheStore = new HHFilteredCache(cache, hhPct, writeUpdateFreq, rolloverFreq) | ||
| new EagerWriteThroughCacheStore[K, V](store, filteredCacheStore) | ||
| } | ||
| } |
56 changes: 56 additions & 0 deletions
56
storehaus-cache/src/main/scala/com/twitter/storehaus/cache/CacheProxy.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * Copyright 2013 Twitter 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 com.twitter.storehaus.cache | ||
|
|
||
| /** Defines the base of a proxy for a given type. | ||
| * A instance of Proxied for type T is intended to use the `self` | ||
| * member to forward all methods of an new instance of type T to. | ||
| * This allows for extensions of type T which can inherit a proxied | ||
| * instance's behavior without needing to override every method of type T. | ||
| * | ||
| * {{{ | ||
| * | ||
| * class Dazzle { | ||
| * def a: String = "default a" | ||
| * def b: String = "default b" | ||
| * // ... | ||
| * } | ||
| * | ||
| * // define a reusable concrete proxy statisfying Dazzle forwarding | ||
| * // all calls to Proxied method self | ||
| * class DazzleProxy(val self: Dazzle) extends Dazzle with Proxied[Dazzle] { | ||
| * def a: String = self.a | ||
| * def b: String = self.b | ||
| * } | ||
| * | ||
| * val bedazzlable = new Dazzle { | ||
| * // return a new Dazzle with some sizzle | ||
| * def be(sizzle: String): Dazzle = new DazzleProxy(this) { | ||
| * override def b = "%s %s!!!" format(self.b, sizzle) | ||
| * } | ||
| * } | ||
| * | ||
| * val dazzled = bedazzlable.be("dazzled") | ||
| * dazzled.b // default b dazzled!!! | ||
| * dazzled.a // default a | ||
| * | ||
| * }}} | ||
| * | ||
| * @author Doug Tangren | ||
| */ | ||
| trait CacheProxied[T] { | ||
| protected def self: T | ||
| } |
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