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36 package gr.grnet.aquarium.logic.accounting
38 import dsl.{Timeslot, DSLPolicy, DSL}
39 import gr.grnet.aquarium.Configurator._
40 import gr.grnet.aquarium.util.Loggable
41 import java.io.{InputStream, FileInputStream, File}
43 import com.ckkloverdos.maybe.{Maybe, Just}
46 * Searches for and loads the applicable accounting policy
48 * @author Georgios Gousios <gousiosg@gmail.com>
50 object Policy extends DSL with Loggable {
52 private var policies = {reloadPolicies}
54 lazy val policy = loadPolicyFromFile(policyFile)
56 def policy(at: Date): Maybe[DSLPolicy] = Maybe {
58 a => a._1.from.before(at) &&
63 throw new AccountingException("No valid policy for date: %s".format(at))
67 def policies(from: Date, to: Date): List[DSLPolicy] = {
69 a => a._1.from.before(from) &&
74 def policies(t: Timeslot): List[DSLPolicy] = policies(t.from, t.to)
76 def loadPolicyFromFile(pol: File): DSLPolicy = {
78 val stream = pol.exists() match {
80 logger.info("Using policy file %s".format(pol.getAbsolutePath))
81 new FileInputStream(pol)
83 logger.warn(("Cannot find user configured policy file %s, " +
84 "looking for default policy").format(pol.getAbsolutePath))
85 getClass.getClassLoader.getResourceAsStream("policy.yaml") match {
86 case x: InputStream =>
87 logger.warn("Using default policy, this is problably not what you want")
90 logger.error("No valid policy file found, Aquarium will fail")
97 private def policyFile: File =
98 MasterConfigurator.props.get(Keys.aquarium_policy) match {
99 case Just(x) => new File(x)
100 case _ => new File("/etc/aquarium/policy.yaml")
103 private def reloadPolicies(): Map[Timeslot, DSLPolicy] = synchronized {
104 //1. Load policies from db
105 val policies = MasterConfigurator.policyEventStore.loadPolicies(0)
107 //2. Check whether policy file has been updated
108 val latestPolicyChange = policies.last.validFrom
109 val policyf = policyFile
112 if (policyf.exists) {
113 if (policyf.lastModified > latestPolicyChange) {
116 logger.info("Policy not changed since last check")
119 logger.warn("User specified policy file %s does not exist, " +
120 "using stored policy information".format(policyf.getAbsolutePath))
127 policies.foldLeft(Map[Timeslot, DSLPolicy]())(
129 acc ++ Map(Timeslot(new Date(p.validFrom), new Date(p.validTo)) -> parse(p.policyYAML)))