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Move SiriusFactory to api package (per issue #11) #23
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183 changes: 183 additions & 0 deletions
183
src/main/scala/com/comcast/xfinity/sirius/SiriusFactory.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,183 @@ | ||
| /* | ||
| * Copyright 2012-2014 Comcast Cable Communications Management, LLC | ||
| * | ||
| * 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.comcast.xfinity.sirius | ||
|
|
||
| import java.io.File | ||
| import java.lang.management.ManagementFactory | ||
| import java.net.InetAddress | ||
| import java.util.{HashMap => JHashMap} | ||
|
|
||
| import com.comcast.xfinity.sirius.admin.ObjectNameHelper | ||
| import com.comcast.xfinity.sirius.api.RequestHandler | ||
| import com.comcast.xfinity.sirius.api.{Sirius, SiriusConfiguration} | ||
| import com.comcast.xfinity.sirius.api.impl.SiriusImpl | ||
| import com.comcast.xfinity.sirius.info.SiriusInfo | ||
| import com.comcast.xfinity.sirius.writeaheadlog.CachedSiriusLog | ||
| import com.comcast.xfinity.sirius.writeaheadlog.SiriusLog | ||
| import com.typesafe.config.Config | ||
| import com.typesafe.config.ConfigFactory | ||
|
|
||
| import akka.actor.ActorRef | ||
| import akka.actor.ActorSystem | ||
| import javax.management.ObjectName | ||
| import com.comcast.xfinity.sirius.uberstore.segmented.SegmentedUberStore | ||
| import com.comcast.xfinity.sirius.uberstore.UberStore | ||
|
|
||
| /** | ||
| * Factory for [[com.comcast.xfinity.sirius.api.Sirius]] instances | ||
| */ | ||
| object SiriusFactory { | ||
|
|
||
| /** | ||
| * Sirius factory method, takes parameters to construct a | ||
| * SiriusImpl and the dependent ActorSystem and return the | ||
| * created instance. Calling shutdown on the produced SiriusImpl | ||
| * will also shutdown the dependent ActorSystem. | ||
| * | ||
| * @param requestHandler the RequestHandler containing callbacks for | ||
| * manipulating the system's state | ||
| * @param siriusConfig a SiriusConfiguration containing configuration | ||
| * info needed for this node. | ||
| * @see SiriusConfiguration for info on needed config. | ||
| * | ||
| * @return A Sirius instance constructed using the parameters | ||
| */ | ||
| def createInstance(requestHandler: RequestHandler, | ||
| siriusConfig: SiriusConfiguration): Sirius = { | ||
|
|
||
| val uberStoreDir = siriusConfig.getProp[String](SiriusConfiguration.LOG_LOCATION) match { | ||
| case Some(dir) => dir | ||
| case None => | ||
| throw new IllegalArgumentException(SiriusConfiguration.LOG_LOCATION + | ||
| " must be set on config") | ||
| } | ||
|
|
||
| val backendLog = { | ||
| siriusConfig.getProp(SiriusConfiguration.LOG_VERSION_ID, "") match { | ||
| case version if version == SegmentedUberStore.versionId => | ||
| SegmentedUberStore(uberStoreDir, siriusConfig) | ||
| case _ => UberStore(uberStoreDir) | ||
| } | ||
| } | ||
|
|
||
| val log: SiriusLog = { | ||
| if (siriusConfig.getProp(SiriusConfiguration.LOG_USE_WRITE_CACHE, true)) { | ||
| val cacheSize = siriusConfig.getProp(SiriusConfiguration.LOG_WRITE_CACHE_SIZE, 10000) | ||
| CachedSiriusLog(backendLog, cacheSize) | ||
| } else { | ||
| backendLog | ||
| } | ||
| } | ||
|
|
||
| createInstance(requestHandler, siriusConfig, log) | ||
| } | ||
|
|
||
| /** | ||
| * USE ONLY FOR TESTING HOOK WHEN YOU NEED TO MOCK OUT A LOG. | ||
| * Real code should use the two argument factory method. | ||
| * | ||
| * @param requestHandler the RequestHandler containing callbacks for | ||
| * manipulating the system's state | ||
| * @param siriusConfig a SiriusConfiguration containing configuration | ||
| * info needed for this node. | ||
| * @see SiriusConfiguration for info on needed config. | ||
| * @param siriusLog the persistence layer to which events should be | ||
| * committed to and replayed from. | ||
| * | ||
| * @return A SiriusImpl constructed using the parameters (note: this | ||
| * differs from the 2-arg method, which returns a Sirius trait) | ||
| */ | ||
| private[sirius] def createInstance(requestHandler: RequestHandler, | ||
| siriusConfig: SiriusConfiguration, | ||
| siriusLog: SiriusLog): SiriusImpl = { | ||
|
|
||
| val systemName = siriusConfig.getProp(SiriusConfiguration.AKKA_SYSTEM_NAME, "sirius-system") | ||
|
|
||
| implicit val actorSystem = ActorSystem(systemName, createActorSystemConfig(siriusConfig)) | ||
|
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| // inject an mbean server, without regard for the one that may have been there | ||
| val mbeanServer = ManagementFactory.getPlatformMBeanServer | ||
| siriusConfig.setProp(SiriusConfiguration.MBEAN_SERVER, mbeanServer) | ||
|
|
||
| // here it is! the real deal creation | ||
| val impl = SiriusImpl(requestHandler, siriusLog, siriusConfig) | ||
|
|
||
| // create a SiriusInfo MBean which will remain registered until we explicity shutdown sirius | ||
| val (siriusInfoObjectName, siriusInfo) = createSiriusInfoMBean(actorSystem, impl.supervisor) | ||
| mbeanServer.registerMBean(siriusInfo, siriusInfoObjectName) | ||
|
|
||
| // need to shut down the actor system and unregister the mbeans when sirius is done | ||
| impl.onShutdown({ | ||
| actorSystem.shutdown() | ||
| actorSystem.awaitTermination() | ||
| mbeanServer.unregisterMBean(siriusInfoObjectName) | ||
| }) | ||
|
|
||
| impl | ||
| } | ||
|
|
||
| private def createSiriusInfoMBean(actorSystem: ActorSystem, siriusSup: ActorRef): (ObjectName, SiriusInfo) = { | ||
| val siriusInfo = new SiriusInfo(actorSystem, siriusSup) | ||
| val objectNameHelper = new ObjectNameHelper | ||
| val siriusInfoObjectName = objectNameHelper.getObjectName(siriusInfo, siriusSup, actorSystem) | ||
| (siriusInfoObjectName, siriusInfo) | ||
| } | ||
|
|
||
| /** | ||
| * Creates configuration for the ActorSystem. The config precedence is as follows: | ||
| * 1) host/port config trump all | ||
| * 2) siriusConfig supplied external config next | ||
| * 3) sirius-akka-base.conf, packaged with sirius, loaded with ConfigFactory.load | ||
| */ | ||
| private def createActorSystemConfig(siriusConfig: SiriusConfiguration): Config = { | ||
| val hostPortConfig = createHostPortConfig(siriusConfig) | ||
| val externalConfig = createExternalConfig(siriusConfig) | ||
|
|
||
| val baseAkkaConfig = ConfigFactory.load("sirius-akka-base.conf") | ||
|
|
||
| hostPortConfig.withFallback(externalConfig).withFallback(baseAkkaConfig) | ||
| } | ||
|
|
||
| private def createHostPortConfig(siriusConfig: SiriusConfiguration): Config = { | ||
| val configMap = new JHashMap[String, Any]() | ||
|
|
||
| configMap.put("akka.remote.netty.tcp.hostname", | ||
| siriusConfig.getProp(SiriusConfiguration.HOST, InetAddress.getLocalHost.getHostName)) | ||
| configMap.put("akka.remote.netty.tcp.port", | ||
| siriusConfig.getProp(SiriusConfiguration.PORT, 2552)) | ||
|
|
||
| // this is just so that the intellij shuts up | ||
| ConfigFactory.parseMap(configMap.asInstanceOf[JHashMap[String, _ <: AnyRef]]) | ||
| } | ||
|
|
||
| /** | ||
| * If siriusConfig is such configured, will load up an external configuration | ||
| * for the Akka ActorSystem which is created. The filesystem is checked first, | ||
| * then the classpath, if neither exist, or siriusConfig is not configured as | ||
| * much, then an empty Config object is returned. | ||
| */ | ||
| private def createExternalConfig(siriusConfig: SiriusConfiguration): Config = | ||
| siriusConfig.getProp[String](SiriusConfiguration.AKKA_EXTERN_CONFIG) match { | ||
| case None => ConfigFactory.empty() | ||
| case Some(externConfig) => | ||
| val externConfigFile = new File(externConfig) | ||
| if (externConfigFile.exists()) { | ||
| ConfigFactory.parseFile(externConfigFile) | ||
| } else { | ||
| ConfigFactory.parseResources(externConfig) | ||
| } | ||
| } | ||
| } | ||
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Also need to revamp this a little. Sirius trait doesn't have shutdown(), for one, and we're return Sirius instead of SiriusImpl.