1 files changed, 24 insertions, 0 deletions
diff --git a/core-rest/src/main/scala/xyz/driver/core/rest/serviceDiscovery.scala b/core-rest/src/main/scala/xyz/driver/core/rest/serviceDiscovery.scala
new file mode 100644
index 0000000..55f1a2e
--- /dev/null
+++ b/core-rest/src/main/scala/xyz/driver/core/rest/serviceDiscovery.scala
@@ -0,0 +1,24 @@
+package xyz.driver.core.rest
+
+import xyz.driver.core.Name
+
+trait ServiceDiscovery {
+
+  def discover[T <: Service](serviceName: Name[Service]): T
+}
+
+trait SavingUsedServiceDiscovery {
+  private val usedServices = new scala.collection.mutable.HashSet[String]()
+
+  def saveServiceUsage(serviceName: Name[Service]): Unit = usedServices.synchronized {
+    usedServices += serviceName.value
+  }
+
+  def getUsedServices: Set[String] = usedServices.synchronized { usedServices.toSet }
+}
+
+class NoServiceDiscovery extends ServiceDiscovery with SavingUsedServiceDiscovery {
+
+  def discover[T <: Service](serviceName: Name[Service]): T =
+    throw new IllegalArgumentException(s"Service with name $serviceName is unknown")
+}