Implement the WES service-info endpoint (#4455)

* Implement the WES service-info endpoint

build.sbt

@@ -238,8 +238,16 @@ lazy val engine = project
   .dependsOn(ossFileSystem)
   .dependsOn(gcsFileSystem)
   .dependsOn(sraFileSystem)
+  .dependsOn(awsS3FileSystem % "test->test")
+  .dependsOn(demoDosFileSystem % "test->test")
+  .dependsOn(httpFileSystem % "test->test")
+  .dependsOn(ftpFileSystem % "test->test")
   .dependsOn(`cloud-nio-spi`)
   .dependsOn(languageFactoryCore)
+  .dependsOn(cwlV1_0LanguageFactory % "test->test")
+  .dependsOn(wdlDraft2LanguageFactory % "test->test")
+  .dependsOn(wdlDraft3LanguageFactory % "test->test")
+  .dependsOn(wdlBiscayneLanguageFactory % "test->test")
   .dependsOn(common % "test->test")
   .dependsOn(core % "test->test")
   .dependsOn(backend % "test->test")

core/src/main/resources/reference.conf

@@ -478,3 +478,12 @@ load-control {
   # How often each actor should update its perceived load
   monitoring-frequency = 5 seconds
 }
+
+ga4gh {
+  wes {
+    # URLs for site-specific auth process as well as contact info for security issues.
+    # These aren't really compelling defaults, but there aren't really any compelling defaults
+    auth-instructions-url = "https://cromwell.readthedocs.io/en/stable/"
+    contact-info-url = "https://cromwell.readthedocs.io/en/stable/"
+  }
+}

core/src/main/scala/cromwell/core/filesystem/CromwellFileSystems.scala

@@ -36,6 +36,8 @@ class CromwellFileSystems(globalConfig: Config) {
     constructorMap.unsafe("Failed to initialize Cromwell filesystems")
   } else Map.empty
 
+  val supportedFileSystems: Iterable[String] = factoryBuilders.keys
+
   // Generate the appropriate constructor and optional singleton instance for a filesystem
   private def processFileSystem(key: String, fsConfig: ConfigObject): ErrorOr[(String, (Constructor[_], Option[AnyRef]))] = {
     // This is the (optional) singleton instance shared by all factory instances

engine/src/main/scala/cromwell/engine/workflow/workflowstore/WorkflowStoreActor.scala

@@ -3,6 +3,7 @@ package cromwell.engine.workflow.workflowstore
 import java.time.OffsetDateTime
 
 import akka.actor.{Actor, ActorLogging, ActorRef, Props}
+import akka.pattern.pipe
 import cats.data.NonEmptyList
 import cromwell.core.Dispatcher.EngineDispatcher
 import cromwell.core._
@@ -18,6 +19,8 @@ final case class WorkflowStoreActor private(
   extends Actor with ActorLogging with GracefulShutdownHelper {
   import WorkflowStoreActor._
 
+  implicit val ec = context.dispatcher
+
   lazy val workflowStoreSubmitActor: ActorRef = context.actorOf(
     WorkflowStoreSubmitActor.props(
       workflowStoreDatabase = workflowStore,
@@ -45,6 +48,11 @@ final case class WorkflowStoreActor private(
     case cmd: WorkflowStoreActorSubmitCommand => workflowStoreSubmitActor forward cmd
     case cmd: WorkflowStoreActorEngineCommand => workflowStoreEngineActor forward cmd
     case cmd: WorkflowStoreWriteHeartbeatCommand => workflowStoreHeartbeatWriteActor forward cmd
+    case GetWorkflowStoreStats =>
+      // Retrieve the workflow store stats, convert the WorkflowStoreStates to WorkflowStates
+      val stats = workflowStore.stats.map(m => m.map(e => WorkflowState.withName(e._1.toString) -> e._2))
+      stats pipeTo sender
+      ()
   }
 }
 
@@ -66,6 +74,8 @@ object WorkflowStoreActor {
   final case class SubmitWorkflow(source: WorkflowSourceFilesCollection) extends WorkflowStoreActorSubmitCommand
   final case class BatchSubmitWorkflows(sources: NonEmptyList[WorkflowSourceFilesCollection]) extends WorkflowStoreActorSubmitCommand
 
+  final case object GetWorkflowStoreStats
+
   case class WorkflowStoreWriteHeartbeatCommand(workflowId: WorkflowId, submissionTime: OffsetDateTime)
 
   def props(

engine/src/main/scala/cromwell/webservice/routes/wes/ServiceInfo.scala

@@ -0,0 +1,83 @@
+package cromwell.webservice.routes.wes
+
+import java.net.URL
+
+import akka.actor.ActorRef
+import akka.util.Timeout
+import cromwell.core.filesystem.CromwellFileSystems
+import cromwell.engine.language.CromwellLanguages
+import cromwell.webservice.routes.CromwellApiService
+import net.ceedubs.ficus.Ficus._
+import com.typesafe.config.ConfigFactory
+import spray.json.DefaultJsonProtocol
+import akka.pattern.ask
+import cromwell.core.WorkflowState
+import cromwell.engine.workflow.workflowstore.WorkflowStoreActor.GetWorkflowStoreStats
+import cromwell.webservice.routes.wes.WesState.WesState
+
+import scala.concurrent.{ExecutionContext, Future}
+
+object ServiceInfo {
+  private lazy val config = ConfigFactory.load()
+
+  // Which languages and which versions of those languages does this Cromwell support?
+  // CromwellLanguages.instance.languages is a Map[Language, Map[Version, Factory]]. We want Map[Language -> Version]
+  lazy val WorkflowTypeVersion = CromwellLanguages.instance.languages.map(x => x._1 -> x._2.allVersions.keys)
+
+  // Which versions of WES does this Cromwell support?
+  val SupportedWesVersions = List("1.0")
+
+  // Which filesystems does this Cromwell support? NB: It's a known flaw of spec that not all backends may support all FS
+  lazy val SupportedFilesystemProtocols = CromwellFileSystems.instance.supportedFileSystems
+
+  // In Cromwell terms, default workflow options. Viewing this as too much trouble to fill in unless someone complains
+  val DefaultWorkflowEngineParameters = List.empty[DefaultWorkflowEngineParameter]
+
+  // Which engines and which version(s) of those engines does this WES support. Kinda obvious for Cromwell
+  val WorkflowEngineVerisons = Map("Cromwell" -> CromwellApiService.cromwellVersion)
+
+  // URL which provides site specific authorization information. Doesn't really apply to Cromwell for now
+  lazy val AuthInstructionsUrl = config.as[URL]("ga4gh.wes.auth-instructions-url")
+  // URL which provides site specific contact information for security issues
+  lazy val ContactInfoUrl = config.as[URL]("ga4gh.wes.contact-info-url")
+
+  /*
+    Optional key/value pairs. Could potentially be added to the config but not going to bother until if/when someone asks for it
+   */
+  val Tags = Map.empty[String, String]
+
+  /**
+    * Generate any runtime level information and create a response to the client
+    */
+  def toWesResponse(workflowStoreActor: ActorRef)(implicit ec: ExecutionContext, timeout: Timeout): Future[WesStatusInfoResponse] = {
+    workflowStats(workflowStoreActor).map(stats =>
+      WesStatusInfoResponse(WorkflowTypeVersion,
+        SupportedWesVersions,
+        SupportedFilesystemProtocols,
+        WorkflowEngineVerisons,
+        DefaultWorkflowEngineParameters,
+        stats,
+        AuthInstructionsUrl.toString,
+        ContactInfoUrl.toString,
+        Tags)
+    )
+  }
+
+  /**
+    * Retrieve a map from state to count for all represented non-terminal workflow states
+    */
+  private def workflowStats(workflowStoreActor: ActorRef)(implicit ec: ExecutionContext, timeout: Timeout): Future[Map[WesState, Int]] = {
+    workflowStoreActor.ask(GetWorkflowStoreStats)
+      .mapTo[Map[WorkflowState, Int]]
+      .map(m => m.map(e => WesState.fromCromwellStatus(e._1) -> e._2)) // Convert WorkflowState -> WesState
+  }
+}
+
+/*
+  Models the type DefaultWorkflowEngineParameter in the WES Swagger
+ */
+final case class DefaultWorkflowEngineParameter(name: String, `type`: String, default_value: String)
+
+object DefaultWorkflowEngineParameter extends DefaultJsonProtocol {
+  implicit val DefaultWorkflowEngineParameterFormat = jsonFormat3(DefaultWorkflowEngineParameter.apply)
+}

engine/src/main/scala/cromwell/webservice/routes/wes/WesResponse.scala

@@ -9,12 +9,24 @@ final case class WesErrorResponse(msg: String, status_code: Int) extends WesResp
 final case class WesRunId(run_id: String) extends WesResponse
 final case class WesRunStatus(run_id: String, state: WesState) extends WesResponse
 
+final case class WesStatusInfoResponse(workflow_type_version: Map[String, Iterable[String]],
+                                    supported_wes_versions: Iterable[String],
+                                    supported_filesystem_protocols: Iterable[String],
+                                    workflow_engine_versions: Map[String, String],
+                                    default_workflow_engine_parameters: Iterable[DefaultWorkflowEngineParameter],
+                                    system_state_counts: Map[WesState, Int],
+                                    auth_instructions_url: String,
+                                    contact_info_url: String,
+                                    tags: Map[String, String]) extends WesResponse
+
 object WesResponseJsonSupport extends SprayJsonSupport with DefaultJsonProtocol {
   import WesStateJsonSupport._
+  import DefaultWorkflowEngineParameter.DefaultWorkflowEngineParameterFormat
 
   implicit val WesResponseErrorFormat = jsonFormat2(WesErrorResponse)
   implicit val WesResponseRunIdFormat = jsonFormat1(WesRunId)
   implicit val WesResponseStatusFormat = jsonFormat2(WesRunStatus)
+  implicit val WesResponseStatusInfoFormat = jsonFormat9(WesStatusInfoResponse)
 
   implicit object WesResponseFormat extends RootJsonFormat[WesResponse] {
     import spray.json._
@@ -24,6 +36,7 @@ object WesResponseJsonSupport extends SprayJsonSupport with DefaultJsonProtocol
         case r: WesRunId => r.toJson
         case s: WesRunStatus => s.toJson
         case e: WesErrorResponse => e.toJson
+        case i: WesStatusInfoResponse => i.toJson
       }
     }
 

engine/src/main/scala/cromwell/webservice/routes/wes/WesRouteSupport.scala

@@ -44,32 +44,39 @@ trait WesRouteSupport extends HttpInstrumentation {
   val wesRoutes: Route =
     instrumentRequest {
       concat(
-        pathPrefix("ga4gh" / "wes" / "v1" / "runs") {
+        pathPrefix("ga4gh" / "wes" / "v1") {
           concat(
-            path(Segment / "status") { possibleWorkflowId =>
-              val response  = validateWorkflowId(possibleWorkflowId, serviceRegistryActor).flatMap(w => serviceRegistryActor.ask(GetStatus(w)).mapTo[MetadataServiceResponse])
-              // WES can also return a 401 or a 403 but that requires user auth knowledge which Cromwell doesn't currently have
-              onComplete(response) {
-                case Success(s: StatusLookupResponse) =>
-                  val wesState = WesState.fromCromwellStatus(s.status)
-                  complete(WesRunStatus(s.workflowId.toString, wesState))
-                case Success(r: StatusLookupFailed) => r.reason.errorRequest(StatusCodes.InternalServerError)
-                case Success(m: MetadataServiceResponse) =>
-                  // This should never happen, but ....
-                  val error = new IllegalStateException("Unexpected response from Metadata service: " + m)
-                  error.errorRequest(StatusCodes.InternalServerError)
-                case Failure(_: UnrecognizedWorkflowException) => complete(NotFoundError)
-                case Failure(e) => complete(WesErrorResponse(e.getMessage, StatusCodes.InternalServerError.intValue))
-              }
+            path("service-info") {
+              complete(ServiceInfo.toWesResponse(workflowStoreActor))
             },
-            path(Segment / "cancel") { possibleWorkflowId =>
-              post {
-                  CromwellApiService.abortWorkflow(possibleWorkflowId,
-                    workflowStoreActor,
-                    workflowManagerActor,
-                    successHandler = WesAbortSuccessHandler,
-                    errorHandler = WesAbortErrorHandler)
-              }
+            pathPrefix("runs") {
+              concat(
+                path(Segment / "status") { possibleWorkflowId =>
+                  val response = validateWorkflowId(possibleWorkflowId, serviceRegistryActor).flatMap(w => serviceRegistryActor.ask(GetStatus(w)).mapTo[MetadataServiceResponse])
+                  // WES can also return a 401 or a 403 but that requires user auth knowledge which Cromwell doesn't currently have
+                  onComplete(response) {
+                    case Success(s: StatusLookupResponse) =>
+                      val wesState = WesState.fromCromwellStatus(s.status)
+                      complete(WesRunStatus(s.workflowId.toString, wesState))
+                    case Success(r: StatusLookupFailed) => r.reason.errorRequest(StatusCodes.InternalServerError)
+                    case Success(m: MetadataServiceResponse) =>
+                      // This should never happen, but ....
+                      val error = new IllegalStateException("Unexpected response from Metadata service: " + m)
+                      error.errorRequest(StatusCodes.InternalServerError)
+                    case Failure(_: UnrecognizedWorkflowException) => complete(NotFoundError)
+                    case Failure(e) => complete(WesErrorResponse(e.getMessage, StatusCodes.InternalServerError.intValue))
+                  }
+                },
+                path(Segment / "cancel") { possibleWorkflowId =>
+                  post {
+                    CromwellApiService.abortWorkflow(possibleWorkflowId,
+                      workflowStoreActor,
+                      workflowManagerActor,
+                      successHandler = WesAbortSuccessHandler,
+                      errorHandler = WesAbortErrorHandler)
+                  }
+                }
+              )
             }
           )
         }

engine/src/test/scala/cromwell/webservice/routes/CromwellApiServiceSpec.scala

@@ -10,7 +10,7 @@ import cromwell.core._
 import cromwell.core.abort.{WorkflowAbortFailureResponse, WorkflowAbortRequestedResponse, WorkflowAbortedResponse}
 import cromwell.engine.workflow.WorkflowManagerActor
 import cromwell.engine.workflow.WorkflowManagerActor.WorkflowNotFoundException
-import cromwell.engine.workflow.workflowstore.WorkflowStoreActor.{AbortWorkflowCommand, BatchSubmitWorkflows, SubmitWorkflow, WorkflowOnHoldToSubmittedCommand}
+import cromwell.engine.workflow.workflowstore.WorkflowStoreActor._
 import cromwell.engine.workflow.workflowstore.WorkflowStoreEngineActor.{WorkflowOnHoldToSubmittedFailure, WorkflowOnHoldToSubmittedSuccess}
 import cromwell.engine.workflow.workflowstore.WorkflowStoreSubmitActor.{WorkflowSubmittedToStore, WorkflowsBatchSubmittedToStore}
 import cromwell.services.healthmonitor.HealthMonitorServiceActor.{GetCurrentStatus, StatusCheckResponse, SubsystemStatus}
@@ -579,6 +579,7 @@ object CromwellApiServiceSpec {
           case WorkflowId(_) => throw new Exception("Something untoward happened")
         }
         sender ! message
+      case GetWorkflowStoreStats => sender ! Map(WorkflowRunning -> 5, WorkflowSubmitted -> 3, WorkflowAborting -> 2)
     }
   }
 

engine/src/test/scala/cromwell/webservice/routes/wes/ServiceInfoSpec.scala

@@ -0,0 +1,40 @@
+package cromwell.webservice.routes.wes
+
+import akka.actor.Props
+import akka.http.scaladsl.testkit.ScalatestRouteTest
+import akka.util.Timeout
+import cromwell.engine.language.{CromwellLanguages, LanguageConfiguration}
+import cromwell.webservice.routes.CromwellApiService
+import cromwell.webservice.routes.CromwellApiServiceSpec.MockWorkflowStoreActor
+import org.scalatest.{AsyncFlatSpec, Matchers}
+
+import scala.concurrent.duration._
+
+class ServiceInfoSpec extends AsyncFlatSpec with ScalatestRouteTest with Matchers {
+  val actorRefFactory = system
+  implicit val ec = system.dispatcher
+  implicit val timeout: Timeout = 5.seconds
+
+  val workflowStoreActor = actorRefFactory.actorOf(Props(new MockWorkflowStoreActor()))
+
+  CromwellLanguages.initLanguages(LanguageConfiguration.AllLanguageEntries)
+
+  behavior of "ServiceInfo"
+
+  val expectedResponse = WesStatusInfoResponse(Map("CWL" -> Set("v1.0"), "WDL" -> Set("draft-2", "1.0", "biscayne")),
+    List("1.0"),
+    Set("ftp", "s3", "demo-dos", "gcs", "oss", "http"),
+    Map("Cromwell" -> CromwellApiService.cromwellVersion),
+    List(),
+    Map(WesState.Running -> 5, WesState.Queued -> 3, WesState.Canceling -> 2),
+    "https://cromwell.readthedocs.io/en/stable/",
+    "https://cromwell.readthedocs.io/en/stable/",
+    Map())
+
+
+  it should "should eventually build the right WesResponse" in {
+    ServiceInfo.toWesResponse(workflowStoreActor) map { r =>
+      assert(r == expectedResponse)
+    }
+  }
+}

wes2cromwell/src/main/scala/wes2cromwell/WesRunRoutes.scala

@@ -40,39 +40,42 @@ trait WesRunRoutes extends RequestSupport {
   lazy val runRoutes: Route =
     optionalHeaderValue(extractAuthorizationHeader) { authHeader =>
       val cromwellRequestHeaders = authHeader.toList
-
-      pathPrefix("ga4gh" / "wes" / "v1" / "runs") {
+      pathPrefix("ga4gh" / "wes" / "v1") {
         concat(
-          pathEnd {
+          pathPrefix("runs") {
             concat(
-              get {
-                parameters(("page_size".as[Int].?, "page_token".?)) { (pageSize, pageToken) =>
-                  completeCromwellResponse(wes2CromwellInterface.listRuns(pageSize, pageToken, cromwellRequestHeaders))
-                }
+              pathEnd {
+                concat(
+                  get {
+                    parameters(("page_size".as[Int].?, "page_token".?)) { (pageSize, pageToken) =>
+                      completeCromwellResponse(wes2CromwellInterface.listRuns(pageSize, pageToken, cromwellRequestHeaders))
+                    }
+                  },
+                  post {
+                    extractStrictRequest { request =>
+                      extractSubmission() { submission =>
+                        completeCromwellResponse(wes2CromwellInterface.runWorkflow(submission, cromwellRequestHeaders))
+                      }
+                    }
+                  }
+                )
               },
-              post {
-                extractStrictRequest { request =>
-                  extractSubmission() { submission =>
-                    completeCromwellResponse(wes2CromwellInterface.runWorkflow(submission, cromwellRequestHeaders))
+              path(Segment) { workflowId =>
+                concat(
+                  get {
+                    completeCromwellResponse(wes2CromwellInterface.runLog(workflowId, cromwellRequestHeaders))
+                  },
+                  delete {
+                    completeCromwellResponse(wes2CromwellInterface.cancelRun(workflowId, cromwellRequestHeaders))
                   }
-                }
-              }
-            )
-          },
-          path(Segment) { workflowId =>
-            concat(
-              get {
-                completeCromwellResponse(wes2CromwellInterface.runLog(workflowId, cromwellRequestHeaders))
+                )
               },
-              delete {
-                completeCromwellResponse(wes2CromwellInterface.cancelRun(workflowId, cromwellRequestHeaders))
+              path(Segment / "status") { workflowId =>
+                get {
+                  completeCromwellResponse(wes2CromwellInterface.runStatus(workflowId, cromwellRequestHeaders))
+                }
               }
             )
-          },
-          path(Segment / "status") { workflowId =>
-            get {
-              completeCromwellResponse(wes2CromwellInterface.runStatus(workflowId, cromwellRequestHeaders))
-            }
           }
         )
       }