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36 package gr.grnet.aquarium.user
38 import gr.grnet.aquarium.util.json.{JsonHelpers, JsonSupport}
39 import net.liftweb.json.{JsonAST, Xml}
40 import gr.grnet.aquarium.logic.accounting.dsl.DSLAgreement
41 import com.ckkloverdos.maybe.{Failed, Maybe}
42 import gr.grnet.aquarium.logic.events.WalletEntry
43 import gr.grnet.aquarium.util.date.MutableDateCalc
44 import gr.grnet.aquarium.store.RecordID
48 * A comprehensive representation of the User's state.
50 * Note that it is made of autonomous parts that are actually data snapshots.
52 * The different snapshots need not agree on the snapshot time, ie. some state
53 * part may be stale, while other may be fresh.
55 * The user state is meant to be partially updated according to relevant events landing on Aquarium.
57 * @author Christos KK Loverdos <loverdos@gmail.com>
64 * When the user was created in the system (not Aquarium). We use this as a basis for billing periods. Set to
68 userCreationMillis: Long,
71 * Each time the user state is updated, this must be increased.
72 * The counter is used when accessing user state from the cache (user state store)
73 * in order to get the latest value for a particular billing period.
75 stateChangeCounter: Long,
78 * True iff this user state refers to a full billing period, that is a full billing month.
80 isFullBillingMonthState: Boolean,
83 * The full billing period for which this user state refers to.
84 * This is set when the user state refers to a full billing period (= month)
85 * and is used to cache the user state for subsequent queries.
87 theFullBillingMonth: BillingMonthInfo,
90 * If this is a state for a full billing month, then keep here the implicit OFF
91 * resource events or any other whose cost policy demands an implicit event at the end of the billing period.
93 * The use case is this: A VM may have been started (ON state) before the end of the billing period
94 * and ended (OFF state) after the beginning of the next billing period. In order to bill this, we must assume
95 * an implicit OFF even right at the end of the billing period and an implicit ON event with the beginning of the
96 * next billing period.
98 implicitlyTerminatedSnapshot: ImplicitlyIssuedResourceEventsSnapshot,
101 * So far computed wallet entries for the current billing month.
103 billingMonthWalletEntries: List[WalletEntry],
106 * Wallet entries that were computed for out of sync events.
107 * (for the current billing month ??)
109 outOfSyncWalletEntries: List[WalletEntry],
112 * The latest resource events per resource instance
114 latestResourceEventsSnapshot: LatestResourceEventsSnapshot,
117 * Counts the total number of resource events used to produce this user state for
118 * the billing period recorded by `billingPeriodSnapshot`
120 billingPeriodResourceEventsCounter: Long,
123 * The out of sync events used to produce this user state for
124 * the billing period recorded by `billingPeriodSnapshot`
126 billingPeriodOutOfSyncResourceEventsCounter: Long,
128 activeStateSnapshot: ActiveStateSnapshot,
129 creditsSnapshot: CreditSnapshot,
130 agreementsSnapshot: AgreementSnapshot,
131 rolesSnapshot: RolesSnapshot,
132 ownedResourcesSnapshot: OwnedResourcesSnapshot,
133 calculationReason: UserStateCalculationReason = NoSpecificCalculationReason,
134 totalEventsProcessedCounter: Long = 0L,
135 // The user state we used to compute this one. Normally the (cached)
136 // state at the beginning of the billing period.
137 parentUserStateId: Option[String] = None,
139 ) extends JsonSupport {
141 private[this] def _allSnapshots: List[Long] = {
143 activeStateSnapshot.snapshotTime,
144 creditsSnapshot.snapshotTime, agreementsSnapshot.snapshotTime, rolesSnapshot.snapshotTime,
145 ownedResourcesSnapshot.snapshotTime,
146 implicitlyTerminatedSnapshot.snapshotTime,
147 latestResourceEventsSnapshot.snapshotTime
151 def oldestSnapshotTime: Long = _allSnapshots min
153 def newestSnapshotTime: Long = _allSnapshots max
155 def idOpt: Option[String] = _id match {
161 // def userCreationDate = new Date(userCreationMillis)
163 // def userCreationFormatedDate = new MutableDateCalc(userCreationMillis).toString
165 def maybeDSLAgreement(at: Long): Maybe[DSLAgreement] = {
166 agreementsSnapshot match {
167 case snapshot @ AgreementSnapshot(data, _) ⇒
168 snapshot.getAgreement(at)
170 Failed(new Exception("No agreement snapshot found for user %s".format(userId)))
174 def findResourceInstanceSnapshot(resource: String, instanceId: String): Maybe[ResourceInstanceSnapshot] = {
175 ownedResourcesSnapshot.findResourceInstanceSnapshot(resource, instanceId)
178 def getResourceInstanceAmount(resource: String, instanceId: String, defaultValue: Double): Double = {
179 ownedResourcesSnapshot.getResourceInstanceAmount(resource, instanceId, defaultValue)
182 def copyForResourcesSnapshotUpdate(resource: String, // resource name
183 instanceId: String, // resource instance id
185 snapshotTime: Long): UserState = {
187 val (newResources, _, _) = ownedResourcesSnapshot.computeResourcesSnapshotUpdate(resource, instanceId, newAmount, snapshotTime)
190 ownedResourcesSnapshot = newResources,
191 stateChangeCounter = this.stateChangeCounter + 1)
194 def resourcesMap = ownedResourcesSnapshot.toResourcesMap
196 def safeCredits = creditsSnapshot match {
197 case c @ CreditSnapshot(_, _) ⇒ c
198 case _ ⇒ CreditSnapshot(0.0, 0)
204 def fromJson(json: String): UserState = {
205 JsonHelpers.jsonToObject[UserState](json)
208 def fromJValue(jsonAST: JsonAST.JValue): UserState = {
209 JsonHelpers.jValueToObject[UserState](jsonAST)
212 def fromBytes(bytes: Array[Byte]): UserState = {
213 JsonHelpers.jsonBytesToObject[UserState](bytes)
216 def fromXml(xml: String): UserState = {
217 fromJValue(Xml.toJson(scala.xml.XML.loadString(xml)))
221 final val _id = "_id"
222 final val userId = "userId"
226 final class BillingMonthInfo private(val year: Int,
228 val startMillis: Long,
229 val stopMillis: Long) extends Ordered[BillingMonthInfo] {
231 def previousMonth: BillingMonthInfo = {
232 BillingMonthInfo.fromDateCalc(new MutableDateCalc(year, month).goPreviousMonth)
235 def nextMonth: BillingMonthInfo = {
236 BillingMonthInfo.fromDateCalc(new MutableDateCalc(year, month).goNextMonth)
240 def compare(that: BillingMonthInfo) = {
241 val ds = this.startMillis - that.startMillis
242 if(ds < 0) -1 else if(ds == 0) 0 else 1
246 override def equals(any: Any) = any match {
247 case that: BillingMonthInfo ⇒
248 this.year == that.year && this.month == that.month // normally everything else MUST be the same by construction
253 override def hashCode() = {
257 override def toString = "%s-%02d".format(year, month)
260 object BillingMonthInfo {
261 def fromMillis(millis: Long): BillingMonthInfo = {
262 fromDateCalc(new MutableDateCalc(millis))
265 def fromDateCalc(mdc: MutableDateCalc): BillingMonthInfo = {
266 val year = mdc.getYear
267 val month = mdc.getMonthOfYear
268 val startMillis = mdc.goStartOfThisMonth.getMillis
269 val stopMillis = mdc.goEndOfThisMonth.getMillis // no need to `copy` here, since we are discarding `mdc`
271 new BillingMonthInfo(year, month, startMillis, stopMillis)
275 sealed trait UserStateCalculationReason {
277 * Return `true` if the result of the calculation should be stored back to the
278 * [[gr.grnet.aquarium.store.UserStateStore]].
281 def shouldStoreUserState: Boolean
283 def forPreviousBillingMonth: UserStateCalculationReason
286 case object InitialUserStateCalculation extends UserStateCalculationReason {
287 def shouldStoreUserState = true
289 def forPreviousBillingMonth = this
292 * A calculation made for no specific reason. Can be for testing, for example.
295 case object NoSpecificCalculationReason extends UserStateCalculationReason {
296 def shouldStoreUserState = false
298 def forBillingMonthInfo(bmi: BillingMonthInfo) = this
300 def forPreviousBillingMonth = this
304 * An authoritative calculation for the billing period.
306 * This marks a state for caching.
308 * @param billingMonthInfo
310 case class MonthlyBillingCalculation(billingMonthInfo: BillingMonthInfo) extends UserStateCalculationReason {
311 def shouldStoreUserState = true
313 def forPreviousBillingMonth = MonthlyBillingCalculation(billingMonthInfo.previousMonth)
319 * @param forWhenMillis The time this calculation is for
321 case class GenericBillingCalculation(forWhenMillis: Long) extends UserStateCalculationReason {
322 def shouldStoreUserState = false
324 def forPreviousBillingMonth = this