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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}
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))
90 * Initializes a store provider, according to the value configured
91 * in the configuration file. The
93 private[this] lazy val _storeProvider: StoreProvider = {
94 val instance = newInstance[StoreProvider](props.getEx(Keys.store_provider_class))
95 logger.info("Loaded StoreProvider: %s".format(instance.getClass))
99 private[this] lazy val _restService: Lifecycle = {
100 val instance = newInstance[Lifecycle](props.getEx(Keys.rest_service_class))
101 logger.info("Loaded RESTService: %s".format(instance.getClass))
105 private[this] lazy val _userStateStoreM: Maybe[UserStateStore] = {
106 // If there is a specific `UserStateStore` implementation specified in the
107 // properties, then this implementation overrides the user store given by
109 props.get(Keys.user_state_store_class) map { className ⇒
110 val instance = newInstance[UserStateStore](className)
111 logger.info("Overriding UserStateStore provisioning. Implementation given by: %s".format(instance.getClass))
116 private[this] lazy val _resourceEventStoreM: Maybe[ResourceEventStore] = {
117 // If there is a specific `EventStore` implementation specified in the
118 // properties, then this implementation overrides the event store given by
120 props.get(Keys.resource_event_store_class) map { className ⇒
121 val instance = newInstance[ResourceEventStore](className)
122 logger.info("Overriding EventStore provisioning. Implementation given by: %s".format(instance.getClass))
127 private[this] lazy val _userEventStoreM: Maybe[UserEventStore] = {
128 props.get(Keys.user_event_store_class) map { className ⇒
129 val instance = newInstance[UserEventStore](className)
130 logger.info("Overriding UserEventStore provisioning. Implementation given by: %s".format(instance.getClass))
135 private[this] lazy val _WalletEventStoreM: Maybe[WalletEntryStore] = {
136 // If there is a specific `IMStore` implementation specified in the
137 // properties, then this implementation overrides the event store given by
139 props.get(Keys.wallet_entry_store_class) map {
141 val instance = newInstance[WalletEntryStore](className)
142 logger.info("Overriding WalletEntryStore provisioning. Implementation given by: %s".format(instance.getClass))
147 private[this] lazy val _policyStoreM: Maybe[PolicyStore] = {
148 props.get(Keys.policy_store_class) map {
150 val instance = newInstance[PolicyStore](className)
151 logger.info("Overriding PolicyStore provisioning. Implementation given by: %s".format(instance.getClass))
156 private[this] lazy val _resEventProc: ResourceEventProcessorService = new ResourceEventProcessorService
158 private[this] lazy val _imEventProc: UserEventProcessorService = new UserEventProcessorService
160 def get(key: String, default: String = ""): String = props.getOr(key, default)
162 def defaultClassLoader = Thread.currentThread().getContextClassLoader
164 def startServices(): Unit = {
166 _actorProvider.start()
167 _resEventProc.start()
171 def stopServices(): Unit = {
175 _actorProvider.stop()
177 // akka.actor.Actor.registry.shutdownAll()
180 def stopServicesWithDelay(millis: Long) {
185 def actorProvider = _actorProvider
187 def userStateStore = {
188 _userStateStoreM match {
190 case _ ⇒ storeProvider.userStateStore
194 def resourceEventStore = {
195 _resourceEventStoreM match {
197 case _ ⇒ storeProvider.resourceEventStore
202 _WalletEventStoreM match {
204 case _ ⇒ storeProvider.walletEntryStore
208 def userEventStore = {
209 _userEventStoreM match {
211 case _ ⇒ storeProvider.userEventStore
216 _policyStoreM match {
218 case _ ⇒ storeProvider.policyStore
222 def storeProvider = _storeProvider
224 def withStoreProviderClass[C <: StoreProvider](spc: Class[C]): Configurator = {
225 val map = this.props.map
226 val newMap = map.updated(Keys.store_provider_class, spc.getName)
227 val newProps = new Props(newMap)
228 new Configurator(newProps)
232 object Configurator {
233 implicit val DefaultConverters = TheDefaultConverters
235 val MasterConfName = "aquarium.properties"
237 val PolicyConfName = "policy.yaml"
240 * Current directory resource context.
242 val AppBaseResourceContext = new FileStreamResourceContext(".")
245 * Default config context for Aquarium distributions
247 val LocalConfigResourceContext = new FileStreamResourceContext("conf")
250 * The venerable /etc resource context. Applicable in Unix environments
252 val SlashEtcResourceContext = new FileStreamResourceContext("/etc/aquarium")
255 * Class loader resource context.
256 * This has the lowest priority.
258 val ClasspathBaseResourceContext = new ClassLoaderStreamResourceContext(Thread.currentThread().getContextClassLoader)
261 * Use this property to override the place where aquarium configuration resides.
263 * The value of this property is a folder that defines the highest-priority resource context.
265 val ConfBaseFolderSysProp = SysProp("aquarium.conf.base.folder")
267 val BasicResourceContext = new CompositeStreamResourceContext(
269 SlashEtcResourceContext,
270 LocalConfigResourceContext,
271 AppBaseResourceContext,
272 ClasspathBaseResourceContext)
275 * The resource context used in the application.
277 lazy val MasterResourceContext = {
278 ConfBaseFolderSysProp.value match {
280 // We have a system override for the configuration location
281 new CompositeStreamResourceContext(Just(BasicResourceContext), new FileStreamResourceContext(value))
285 throw new RuntimeException(m , e)
289 lazy val MasterConfResource = {
290 val maybeMCResource = MasterResourceContext getResource MasterConfName
291 maybeMCResource match {
292 case Just(masterConfResource) ⇒
295 throw new RuntimeException("Could not find master configuration file: %s".format(MasterConfName))
297 throw new RuntimeException(m, e)
301 lazy val MasterConfProps = {
302 val maybeProps = Props apply MasterConfResource
307 throw new RuntimeException("Could not load master configuration file: %s".format(MasterConfName))
309 throw new RuntimeException(m, e)
313 lazy val MasterConfigurator = {
314 Maybe(new Configurator(MasterConfProps)) match {
315 case Just(masterConf) ⇒
318 throw new RuntimeException("Could not initialize master configuration file: %s".format(MasterConfName))
320 throw new RuntimeException(m, e)
325 * Defines the names of all the known keys inside the master properties file.
330 * The Aquarium version. Will be reported in any due occasion.
332 final val version = "version"
335 * The fully qualified name of the class that implements the `ActorProvider`.
336 * Will be instantiated reflectively and should have a public default constructor.
338 final val actor_provider_class = "actor.provider.class"
341 * The class that initializes the REST service
343 final val rest_service_class = "rest.service.class"
346 * The fully qualified name of the class that implements the `StoreProvider`.
347 * Will be instantiated reflectively and should have a public default constructor.
349 final val store_provider_class = "store.provider.class"
352 * The class that implements the User store
354 final val user_state_store_class = "user.state.store.class"
357 * The class that implements the resource event store
359 final val resource_event_store_class = "resource.event.store.class"
362 * The class that implements the IM event store
364 final val user_event_store_class = "user.event.store.class"
367 * The class that implements the wallet entries store
369 final val wallet_entry_store_class = "wallet.entry.store.class"
372 * The class that implements the wallet entries store
374 final val policy_store_class = "policy.store.class"
377 /** The lower mark for the UserActors' LRU, managed by UserActorManager.
379 * The terminology is borrowed from the (also borrowed) Apache-lucene-solr-based implementation.
382 final val user_actors_lru_lower_mark = "user.actors.LRU.lower.mark"
385 * The upper mark for the UserActors' LRU, managed by UserActorManager.
387 * The terminology is borrowed from the (also borrowed) Apache-lucene-solr-based implementation.
389 final val user_actors_lru_upper_mark = "user.actors.LRU.upper.mark"
392 * Comma separated list of amqp servers running in active-active
395 final val amqp_servers = "amqp.servers"
398 * Comma separated list of amqp servers running in active-active
401 final val amqp_port = "amqp.port"
404 * User name for connecting with the AMQP server
406 final val amqp_username = "amqp.username"
409 * Passwd for connecting with the AMQP server
411 final val amqp_password = "amqp.passwd"
414 * Virtual host on the AMQP server
416 final val amqp_vhost = "amqp.vhost"
419 * Comma separated list of exchanges known to aquarium
421 final val amqp_exchange = "amqp.exchange"
424 * Queues for retrieving resource events from. Multiple queues can be
425 * declared, seperated by semicolon
427 * Format is `exchange:routing.key:queue-name;<exchnage2:routing.key2:queue-name>;...`
429 final val amqp_resevents_queues = "amqp.resevents.queues"
432 * Queues for retrieving user events from. Multiple queues can be
433 * declared, seperated by semicolon
435 * Format is `exchange:routing.key:queue-name;<exchnage2:routing.key2:queue-name>;...`
437 final val amqp_userevents_queues="amqp.userevents.queues"
440 * REST service listening port.
444 final val rest_port = "rest.port"
447 * Provider for persistence services
449 final val persistence_provider = "persistence.provider"
452 * Hostname for the persistence service
454 final val persistence_host = "persistence.host"
457 * Username for connecting to the persistence service
459 final val persistence_username = "persistence.username"
462 * Password for connecting to the persistence service
464 final val persistence_password = "persistence.password"
467 * Password for connecting to the persistence service
469 final val persistence_port = "persistence.port"
472 * The DB schema to use
474 final val persistence_db = "persistence.db"
477 * Maximum number of open connections to MongoDB
479 final val mongo_connection_pool_size = "mongo.connection.pool.size"
482 * Location of the Aquarium accounting policy config file
484 final val aquarium_policy = "aquarium.policy"
487 * Location of the role-agreement mapping file
489 final val aquarium_role_agreement_map = "aquarium.role-agreement.map"
492 * A time period in milliseconds for which we can tolerate stale data regarding user state.
494 * The smaller the value, the more accurate the user credits and other state data are.
496 * If a request for user state (e.g. balance) is received and the request timestamp exceeds
497 * the timestamp of the last known balance amount by this value, then a re-computation for
498 * the balance is triggered.
500 final val user_state_timestamp_threshold = "user.state.timestamp.threshold"
503 * The time unit is the lowest billable time period.
504 * For example, with a time unit of ten seconds, if a VM is started up and shut down in nine
505 * seconds, then the user will be billed for ten seconds.
507 * This is an overall constant. We use it as a property in order to prepare ourselves for
508 * multi-cloud setup, where the same Aquarium instance is used to bill several distinct cloud
511 final val time_unit_in_millis = "time.unit.in.seconds"