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KEST-272: proper config inheritance; log queue/alias config on reload
RB_ID=87497
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Stephan Zuercher
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Sep 21, 2012
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| /* | ||
| * Copyright 2009 Twitter, Inc. | ||
| * Copyright 2009 Robey Pointer <robeypointer@gmail.com> | ||
| * | ||
| * 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 net.lag.kestrel | ||
| package config | ||
|
|
||
| case class AliasConfig( | ||
| destinationQueues: List[String] | ||
| ) { | ||
| override def toString() = { | ||
| ("destinationQueues=[%s]").format(destinationQueues.mkString(", ")) | ||
| } | ||
| } | ||
|
|
||
| class AliasBuilder { | ||
| /** | ||
| * Name of the alias being configured. | ||
| */ | ||
| var name: String = null | ||
|
|
||
| /** | ||
| * List of queues which receive items added to this alias. | ||
| */ | ||
| var destinationQueues: List[String] = Nil | ||
|
|
||
| def apply() = { | ||
| AliasConfig(destinationQueues) | ||
| } | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| /* | ||
| * Copyright 2012 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 net.lag.kestrel | ||
| package config | ||
|
|
||
| /** | ||
| * ConfigValue represents a value that may either be a default or a | ||
| * configuration-specified value. A ConfigValue may be resolved against | ||
| * another value. | ||
| */ | ||
| sealed abstract class ConfigValue[A](x: A) { | ||
| def isSpecified: Boolean | ||
| def get = x | ||
| def resolve(default: Option[A]): A = { | ||
| default match { | ||
| case Some(_) if isSpecified => get | ||
| case Some(v) => v | ||
| case None => get | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /* | ||
| * SpecifiedValue is a ConfigValue specified in a configuration. | ||
| */ | ||
| case class SpecifiedValue[A](x: A) extends ConfigValue[A](x) { | ||
| def isSpecified = true | ||
| } | ||
|
|
||
| /* | ||
| * Default is a ConfigValue specified as a default. | ||
| */ | ||
| case class Default[A] private[config] (x: A) extends ConfigValue[A](x) { | ||
| def isSpecified = false | ||
| } | ||
|
|
||
| /** | ||
| * The ConfigValue companion object provides implicit methods to convert | ||
| * bare objects into SpecifiedValue instances. | ||
| */ | ||
| object ConfigValue { | ||
| implicit def wrap[A](x: A): ConfigValue[A] = SpecifiedValue(x) | ||
| implicit def wrapToOption[A](x: A): ConfigValue[Option[A]] = SpecifiedValue(Some(x)) | ||
| implicit def wrapNone[A](x: None.type): ConfigValue[Option[A]] = SpecifiedValue(None) | ||
| } |
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