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36 package gr.grnet.aquarium
38 import actor.{ActorProvider}
39 import com.ckkloverdos.resource._
40 import com.ckkloverdos.sys.SysProp
41 import com.ckkloverdos.props.Props
42 import com.ckkloverdos.maybe.{Maybe, Failed, Just, NoVal}
43 import com.ckkloverdos.convert.Converters.{DefaultConverters => TheDefaultConverters}
44 import processor.actor.{UserEventProcessorService, ResourceEventProcessorService, EventProcessorService}
46 import util.{Lifecycle, Loggable}
49 * The master configurator. Responsible to load all of application configuration and provide the relevant services.
51 * @author Christos KK Loverdos <loverdos@gmail.com>.
53 class Configurator(val props: Props) extends Loggable {
54 import Configurator.Keys
57 * Reflectively provide a new instance of a class and configure it appropriately.
59 private[this] def newInstance[C : Manifest](className: String): C = {
60 val instanceM = Maybe(defaultClassLoader.loadClass(className).newInstance().asInstanceOf[C])
62 case Just(instance) ⇒ instance match {
63 case configurable: Configurable ⇒
64 Maybe(configurable configure props) match {
68 throw new Exception("Could not configure instance of %s".format(className), e)
70 throw new Exception("Could not configure instance of %s".format(className))
76 throw new Exception("Could not instantiate %s".format(className), e)
78 throw new Exception("Could not instantiate %s".format(className))
83 private[this] lazy val _actorProvider: ActorProvider = {
84 val instance = newInstance[ActorProvider](props.getEx(Keys.actor_provider_class))
85 logger.info("Loaded ActorProvider: %s".format(instance.getClass))
89 private[this] lazy val _storeProvider: StoreProvider = {
90 val instance = newInstance[StoreProvider](props.getEx(Keys.store_provider_class))
91 logger.info("Loaded StoreProvider: %s".format(instance.getClass))
95 private[this] lazy val _restService: Lifecycle = {
96 val instance = newInstance[Lifecycle](props.getEx(Keys.rest_service_class))
97 logger.info("Loaded RESTService: %s".format(instance.getClass))
101 private[this] lazy val _userStateStoreM: Maybe[UserStateStore] = {
102 // If there is a specific `UserStateStore` implementation specified in the
103 // properties, then this implementation overrides the user store given by
105 props.get(Keys.user_state_store_class) map { className ⇒
106 val instance = newInstance[UserStateStore](className)
107 logger.info("Overriding UserStateStore provisioning. Implementation given by: %s".format(instance.getClass))
112 private[this] lazy val _resourceEventStoreM: Maybe[ResourceEventStore] = {
113 // If there is a specific `EventStore` implementation specified in the
114 // properties, then this implementation overrides the event store given by
116 props.get(Keys.resource_event_store_class) map { className ⇒
117 val instance = newInstance[ResourceEventStore](className)
118 logger.info("Overriding EventStore provisioning. Implementation given by: %s".format(instance.getClass))
123 private[this] lazy val _userEventStoreM: Maybe[UserEventStore] = {
124 props.get(Keys.user_event_store_class) map { className ⇒
125 val instance = newInstance[UserEventStore](className)
126 logger.info("Overriding UserEventStore provisioning. Implementation given by: %s".format(instance.getClass))
131 private[this] lazy val _WalletEventStoreM: Maybe[WalletEntryStore] = {
132 // If there is a specific `IMStore` implementation specified in the
133 // properties, then this implementation overrides the event store given by
135 props.get(Keys.wallet_entry_store_class) map {
137 val instance = newInstance[WalletEntryStore](className)
138 logger.info("Overriding WalletEntryStore provisioning. Implementation given by: %s".format(instance.getClass))
143 private[this] lazy val _policyStoreM: Maybe[PolicyStore] = {
144 props.get(Keys.policy_store_class) map {
146 val instance = newInstance[PolicyStore](className)
147 logger.info("Overriding PolicyStore provisioning. Implementation given by: %s".format(instance.getClass))
152 private[this] lazy val _resEventProc: ResourceEventProcessorService = new ResourceEventProcessorService
154 private[this] lazy val _imEventProc: UserEventProcessorService = new UserEventProcessorService
156 def get(key: String, default: String = ""): String = props.getOr(key, default)
158 def defaultClassLoader = Thread.currentThread().getContextClassLoader
160 def startServices(): Unit = {
162 _actorProvider.start()
163 _resEventProc.start()
167 def stopServices(): Unit = {
171 _actorProvider.stop()
173 // akka.actor.Actor.registry.shutdownAll()
176 def stopServicesWithDelay(millis: Long) {
181 def actorProvider = _actorProvider
183 def userStateStore = {
184 _userStateStoreM match {
186 case _ ⇒ storeProvider.userStateStore
190 def resourceEventStore = {
191 _resourceEventStoreM match {
193 case _ ⇒ storeProvider.resourceEventStore
198 _WalletEventStoreM match {
200 case _ ⇒ storeProvider.walletEntryStore
204 def userEventStore = {
205 _userEventStoreM match {
207 case _ ⇒ storeProvider.userEventStore
211 def policyEventStore = {
212 _policyStoreM match {
214 case _ ⇒ storeProvider.policyStore
218 def storeProvider = _storeProvider
220 def withStoreProviderClass[C <: StoreProvider](spc: Class[C]): Configurator = {
221 val map = this.props.map
222 val newMap = map.updated(Keys.store_provider_class, spc.getName)
223 val newProps = new Props(newMap)
224 new Configurator(newProps)
228 object Configurator {
229 implicit val DefaultConverters = TheDefaultConverters
231 val MasterConfName = "aquarium.properties"
233 val PolicyConfName = "policy.yaml"
236 * Current directory resource context.
237 * Normally this should be the application installation directory.
239 * It takes priority over `ClasspathBaseResourceContext`.
241 val AppBaseResourceContext = new FileStreamResourceContext(".")
244 * The venerable /etc resource context
246 val SlashEtcResourceContext = new FileStreamResourceContext("/etc/aquarium")
249 * Class loader resource context.
250 * This has the lowest priority.
252 val ClasspathBaseResourceContext = new ClassLoaderStreamResourceContext(Thread.currentThread().getContextClassLoader)
255 * Use this property to override the place where aquarium configuration resides.
257 * The value of this property is a folder that defines the highest-priority resource context.
259 val ConfBaseFolderSysProp = SysProp("aquarium.conf.base.folder")
261 val BasicResourceContext = new CompositeStreamResourceContext(
263 SlashEtcResourceContext,
264 AppBaseResourceContext,
265 ClasspathBaseResourceContext)
268 * The resource context used in the application.
270 lazy val MasterResourceContext = {
271 ConfBaseFolderSysProp.value match {
273 // We have a system override for the configuration location
274 new CompositeStreamResourceContext(Just(BasicResourceContext), new FileStreamResourceContext(value))
278 throw new RuntimeException(m , e)
282 lazy val MasterConfResource = {
283 val maybeMCResource = MasterResourceContext getResource MasterConfName
284 maybeMCResource match {
285 case Just(masterConfResource) ⇒
288 throw new RuntimeException("Could not find master configuration file: %s".format(MasterConfName))
290 throw new RuntimeException(m, e)
294 lazy val MasterConfProps = {
295 val maybeProps = Props apply MasterConfResource
300 throw new RuntimeException("Could not load master configuration file: %s".format(MasterConfName))
302 throw new RuntimeException(m, e)
306 lazy val MasterConfigurator = {
307 Maybe(new Configurator(MasterConfProps)) match {
308 case Just(masterConf) ⇒
311 throw new RuntimeException("Could not initialize master configuration file: %s".format(MasterConfName))
313 throw new RuntimeException(m, e)
318 * Defines the names of all the known keys inside the master properties file.
322 * The Aquarium version. Will be reported in any due occasion.
324 final val version = "version"
327 * The fully qualified name of the class that implements the `ActorProvider`.
328 * Will be instantiated reflectively and should have a public default constructor.
330 final val actor_provider_class = "actor.provider.class"
333 * The class that initializes the REST service
335 final val rest_service_class = "rest.service.class"
338 * The fully qualified name of the class that implements the `StoreProvider`.
339 * Will be instantiated reflectively and should have a public default constructor.
341 final val store_provider_class = "store.provider.class"
344 * The class that implements the User store
346 final val user_state_store_class = "user.state.store.class"
349 * The class that implements the resource event store
351 final val resource_event_store_class = "resource.event.store.class"
354 * The class that implements the IM event store
356 final val user_event_store_class = "user.event.store.class"
359 * The class that implements the wallet entries store
361 final val wallet_entry_store_class = "wallet.entry.store.class"
364 * The class that implements the wallet entries store
366 final val policy_store_class = "policy.store.class"
369 /** The lower mark for the UserActors' LRU, managed by UserActorManager.
371 * The terminology is borrowed from the (also borrowed) Apache-lucene-solr-based implementation.
374 final val user_actors_lru_lower_mark = "user.actors.LRU.lower.mark"
377 * The upper mark for the UserActors' LRU, managed by UserActorManager.
379 * The terminology is borrowed from the (also borrowed) Apache-lucene-solr-based implementation.
381 final val user_actors_lru_upper_mark = "user.actors.LRU.upper.mark"
384 * Comma separated list of amqp servers running in active-active
387 final val amqp_servers = "amqp.servers"
390 * Comma separated list of amqp servers running in active-active
393 final val amqp_port = "amqp.port"
396 * User name for connecting with the AMQP server
398 final val amqp_username = "amqp.username"
401 * Passwd for connecting with the AMQP server
403 final val amqp_password = "amqp.passwd"
406 * Virtual host on the AMQP server
408 final val amqp_vhost = "amqp.vhost"
411 * Comma separated list of exchanges known to aquarium
413 final val amqp_exchanges = "amqp.exchanges"
416 * REST service listening port.
420 final val rest_port = "rest.port"
423 * Provider for persistence services
425 final val persistence_provider = "persistence.provider"
428 * Hostname for the persistence service
430 final val persistence_host = "persistence.host"
433 * Username for connecting to the persistence service
435 final val persistence_username = "persistence.username"
438 * Password for connecting to the persistence service
440 final val persistence_password = "persistence.password"
443 * Password for connecting to the persistence service
445 final val persistence_port = "persistence.port"
448 * The DB schema to use
450 final val persistence_db = "persistence.db"
453 * Maximum number of open connections to MongoDB
455 final val mongo_connection_pool_size = "mongo.connection.pool.size"
458 * Location of the Aquarium accounting policy config file
460 final val aquarium_policy = "aquarium.policy"
463 * A time period in milliseconds for which we can tolerate stale data regarding user state.
465 * The smaller the value, the more accurate the user credits and other state data are.
467 * If a request for user state (e.g. balance) is received and the request timestamp exceeds
468 * the timestamp of the last known balance amount by this value, then a re-computation for
469 * the balance is triggered.
471 final val user_state_timestamp_threshold = "user.state.timestamp.threshold"
474 * The time unit is the lowest billable time period.
475 * For example, with a time unit of ten seconds, if a VM is started up and shut down in nine
476 * seconds, then the user will be billed for ten seconds.
478 * This is an overall constant. We use it as a property in order to prepare ourselves for
479 * multi-cloud setup, where the same Aquarium instance is used to bill several distinct cloud
482 final val time_unit_in_millis = "time.unit.in.seconds"