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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.{IMEventProcessorService, 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 _WalletEventStoreM: Maybe[WalletEntryStore] = {
124 // If there is a specific `IMStore` implementation specified in the
125 // properties, then this implementation overrides the event store given by
127 props.get(Keys.wallet_entry_store_class) map { className ⇒
128 val instance = newInstance[WalletEntryStore](className)
129 logger.info("Overriding WalletEntryStore provisioning. Implementation given by: %s".format(instance.getClass))
134 private[this] lazy val _resEventProc: ResourceEventProcessorService = new ResourceEventProcessorService
136 private[this] lazy val _imEventProc: EventProcessorService = new IMEventProcessorService
138 def get(key: String, default: String = ""): String = props.getOr(key, default)
140 def defaultClassLoader = Thread.currentThread().getContextClassLoader
142 def startServices(): Unit = {
144 _actorProvider.start()
145 _resEventProc.start()
149 def stopServices(): Unit = {
153 _actorProvider.stop()
155 // akka.actor.Actor.registry.shutdownAll()
158 def stopServicesWithDelay(millis: Long) {
163 def actorProvider = _actorProvider
165 def userStateStore = {
166 _userStateStoreM match {
168 case _ ⇒ storeProvider.userStateStore
172 def resourceEventStore = {
173 _resourceEventStoreM match {
175 case _ ⇒ storeProvider.resourceEventStore
180 _WalletEventStoreM match {
182 case _ ⇒ storeProvider.walletEntryStore
186 def storeProvider = _storeProvider
189 object Configurator {
190 implicit val DefaultConverters = TheDefaultConverters
192 val MasterConfName = "aquarium.properties"
195 * Current directory resource context.
196 * Normally this should be the application installation directory.
198 * It takes priority over `ClasspathBaseResourceContext`.
200 val AppBaseResourceContext = new FileStreamResourceContext(".")
203 * The venerable /etc resource context
205 val SlashEtcResourceContext = new FileStreamResourceContext("/etc")
208 * Class loader resource context.
209 * This has the lowest priority.
211 val ClasspathBaseResourceContext = new ClassLoaderStreamResourceContext(Thread.currentThread().getContextClassLoader)
214 * Use this property to override the place where aquarium configuration resides.
216 * The value of this property is a folder that defines the highest-priority resource context.
218 val ConfBaseFolderSysProp = SysProp("aquarium.conf.base.folder")
221 * The resource context used in the application.
223 lazy val MasterResourceContext = {
224 val rc0 = ClasspathBaseResourceContext
225 val rc1 = AppBaseResourceContext
226 val rc2 = SlashEtcResourceContext
227 val basicContext = new CompositeStreamResourceContext(NoVal, rc2, rc1, rc0)
229 ConfBaseFolderSysProp.value match {
231 // We have a system override for the configuration location
232 new CompositeStreamResourceContext(Just(basicContext), new FileStreamResourceContext(value))
236 throw new RuntimeException(m , e)
240 lazy val MasterConfResource = {
241 val maybeMCResource = MasterResourceContext getResource MasterConfName
242 maybeMCResource match {
243 case Just(masterConfResource) ⇒
246 throw new RuntimeException("Could not find master configuration file: %s".format(MasterConfName))
248 throw new RuntimeException(m, e)
252 lazy val MasterConfProps = {
253 val maybeProps = Props apply MasterConfResource
258 throw new RuntimeException("Could not load master configuration file: %s".format(MasterConfName))
260 throw new RuntimeException(m, e)
264 lazy val MasterConfigurator = {
265 Maybe(new Configurator(MasterConfProps)) match {
266 case Just(masterConf) ⇒
269 throw new RuntimeException("Could not initialize master configuration file: %s".format(MasterConfName))
271 throw new RuntimeException(m, e)
276 * Defines the names of all the known keys inside the master properties file.
280 * The Aquarium version. Will be reported in any due occasion.
282 final val version = "version"
285 * The fully qualified name of the class that implements the `ActorProvider`.
286 * Will be instantiated reflectively and should have a public default constructor.
288 final val actor_provider_class = "actor.provider.class"
291 * The class that initializes the REST service
293 final val rest_service_class = "rest.service.class"
296 * The fully qualified name of the class that implements the `StoreProvider`.
297 * Will be instantiated reflectively and should have a public default constructor.
299 final val store_provider_class = "store.provider.class"
302 * The class that implements the User store
304 final val user_state_store_class = "user.state.store.class"
307 * The class that implements the resource event store
309 final val resource_event_store_class = "resource.event.store.class"
312 * The class that implements the IM event store
314 final val im_eventstore_class = "imevent.store.class"
317 * The class that implements the wallet entries store
319 final val wallet_entry_store_class = "wallet.entry.store.class"
321 /** The lower mark for the UserActors' LRU, managed by UserActorManager.
323 * The terminology is borrowed from the (also borrowed) Apache-lucene-solr-based implementation.
326 final val user_actors_lru_lower_mark = "user.actors.LRU.lower.mark"
329 * The upper mark for the UserActors' LRU, managed by UserActorManager.
331 * The terminology is borrowed from the (also borrowed) Apache-lucene-solr-based implementation.
333 final val user_actors_lru_upper_mark = "user.actors.LRU.upper.mark"
336 * Comma separated list of amqp servers running in active-active
339 final val amqp_servers = "amqp.servers"
342 * Comma separated list of amqp servers running in active-active
345 final val amqp_port = "amqp.port"
348 * User name for connecting with the AMQP server
350 final val amqp_username = "amqp.username"
353 * Passwd for connecting with the AMQP server
355 final val amqp_password = "amqp.passwd"
358 * Virtual host on the AMQP server
360 final val amqp_vhost = "amqp.vhost"
363 * Comma separated list of exchanges known to aquarium
365 final val amqp_exchanges = "amqp.exchanges"
368 * REST service listening port.
372 final val rest_port = "rest.port"
375 * Provider for persistence services
377 final val persistence_provider = "persistence.provider"
380 * Hostname for the persistence service
382 final val persistence_host = "persistence.host"
385 * Username for connecting to the persistence service
387 final val persistence_username = "persistence.username"
390 * Password for connecting to the persistence service
392 final val persistence_password = "persistence.password"
395 * Password for connecting to the persistence service
397 final val persistence_port = "persistence.port"
400 * The DB schema to use
402 final val persistence_db = "persistence.db"
405 * A time period in milliseconds for which we can tolerate stale data regarding user state.
407 * The smaller the value, the more accurate the user credits and other state data are.
409 * If a request for user state (e.g. balance) is received and the request timestamp exceeds
410 * the timestamp of the last known balance amount by this value, then a re-computation for
411 * the balance is triggered.
413 final val user_state_timestamp_threshold = "user.state.timestamp.threshold"