Add URI generator, resolver and corresponding document open & create functions (#3211)

This PR refactor the storage key by representing it using the storage
URI. And this PR also adds the `openDocument` and `createDocument`
function using the given URI.

## Major Changes

### 1. VFS URI resource type definition, resolve and decode functions
Two types of VFS resources are defined:
```
object VFSResourceType extends Enumeration {
  val RESULT: Value = Value("result")
  val MATERIALIZED_RESULT: Value = Value("materializedResult")
}
```

Two defs are added to the `FileResolver`

- `resolve`: create the URI pointing to the storage resource on the VFS
```java
/**
    * Resolve a VFS resource to its URI. The URI can be used by the DocumentFactory to create resource or open resource
    *
    * @param resourceType   The type of the VFS resource.
    * @param workflowId     Workflow identifier.
    * @param executionId    Execution identifier.
    * @param operatorId     Operator identifier.
    * @param portIdentity   Optional port identifier. **Required** if `resourceType` is `RESULT` or `MATERIALIZED_RESULT`.
    * @return A VFS URI
    * @throws IllegalArgumentException if `resourceType` is `RESULT` but `portIdentity` is missing.
    */
  def resolve(
      resourceType: VFSResourceType.Value,
      workflowId: WorkflowIdentity,
      executionId: ExecutionIdentity,
      operatorId: OperatorIdentity,
      portIdentity: Option[PortIdentity] = None
  ): URI
```

- `decodeVFSUri`: decode a VFS URI to components
```java
  /**
    * Parses a VFS URI and extracts its components
    *
    * @param uri The VFS URI to parse.
    * @return A `VFSUriComponents` object with the extracted data.
    * @throws IllegalArgumentException if the URI is malformed.
    */
  def decodeVFSUri(uri: URI): (
      WorkflowIdentity,
      ExecutionIdentity,
      OperatorIdentity,
      Option[PortIdentity],
      VFSResourceType.Value
  )
```


### 2. `createDocument` and `openDocument` functions to the
`DocumentFactory`

`createDocument` and `openDocument` defs to create/open a storage
resource pointed by the URI

- `DocumentFactory.createDocument`
```java
  /**
    * Create a document for storage specified by the uri.
    * This document is suitable for storing structural data, i.e. the schema is required to create such document.
    * @param uri the location of the document
    * @param schema the schema of the data stored in the document
    * @return the created document
    */
  def createDocument(uri: URI, schema: Schema): VirtualDocument[_]
```

- `DocumentFactory.openDocument`
```java
  /**
    * Open a document specified by the uri.
    * The document should be storing the structural data as the document and the schema will be returned
    * @param uri the uri of the document
    * @return the VirtualDocument, which is the handler of the data; the Schema, which is the schema of the data stored in the document
    */
  def openDocument(uri: URI): (VirtualDocument[_], Schema)
```

Author: bobbai00

core/amber/src/main/scala/edu/uci/ics/amber/engine/architecture/scheduling/ScheduleGenerator.scala

@@ -1,6 +1,8 @@
 package edu.uci.ics.amber.engine.architecture.scheduling
 
-import edu.uci.ics.amber.core.storage.result.{OpResultStorage, ResultStorage}
+import edu.uci.ics.amber.core.storage.{DocumentFactory, VFSURIFactory}
+import edu.uci.ics.amber.core.storage.VFSResourceType.MATERIALIZED_RESULT
+import edu.uci.ics.amber.core.storage.result.ExecutionResourcesMapping
 import edu.uci.ics.amber.core.workflow.{PhysicalOp, PhysicalPlan, WorkflowContext}
 import edu.uci.ics.amber.engine.architecture.scheduling.ScheduleGenerator.replaceVertex
 import edu.uci.ics.amber.engine.architecture.scheduling.resourcePolicies.{
@@ -151,17 +153,18 @@ abstract class ScheduleGenerator(
       .removeLink(physicalLink)
 
     // create cache writer and link
-    val storageKey = OpResultStorage.createStorageKey(
+    // create the uri of the materialization storage
+    val storageUri = VFSURIFactory.createMaterializedResultURI(
+      workflowContext.workflowId,
+      workflowContext.executionId,
       physicalLink.fromOpId.logicalOpId,
-      physicalLink.fromPortId,
-      isMaterialized = true
+      physicalLink.fromPortId
     )
+
     val fromPortOutputMode =
       physicalPlan.getOperator(physicalLink.fromOpId).outputPorts(physicalLink.fromPortId)._1.mode
     val matWriterPhysicalOp: PhysicalOp = SpecialPhysicalOpFactory.newSinkPhysicalOp(
-      workflowContext.workflowId,
-      workflowContext.executionId,
-      storageKey,
+      storageUri,
       fromPortOutputMode
     )
     val sourceToWriterLink =
@@ -182,19 +185,15 @@ abstract class ScheduleGenerator(
       ._3
       .toOption
       .get
-    ResultStorage
-      .getOpResultStorage(workflowContext.workflowId)
-      .create(
-        key = storageKey,
-        mode = OpResultStorage.defaultStorageMode,
-        schema = schema
-      )
+    // create the document
+    DocumentFactory.createDocument(storageUri, schema)
+    ExecutionResourcesMapping.addResourceUri(workflowContext.executionId, storageUri)
 
     // create cache reader and link
     val matReaderPhysicalOp: PhysicalOp = SpecialPhysicalOpFactory.newSourcePhysicalOp(
       workflowContext.workflowId,
       workflowContext.executionId,
-      storageKey
+      storageUri
     )
     val readerToDestLink =
       PhysicalLink(

core/amber/src/main/scala/edu/uci/ics/amber/engine/architecture/worker/promisehandlers/InitializeExecutorHandler.scala

@@ -12,6 +12,8 @@ import edu.uci.ics.amber.operator.sink.ProgressiveSinkOpExec
 import edu.uci.ics.amber.operator.source.cache.CacheSourceOpExec
 import edu.uci.ics.amber.util.VirtualIdentityUtils
 
+import java.net.URI
+
 trait InitializeExecutorHandler {
   this: DataProcessorRPCHandlerInitializer =>
 
@@ -26,15 +28,14 @@ trait InitializeExecutorHandler {
       case OpExecWithClassName(className, descString) =>
         ExecFactory.newExecFromJavaClassName(className, descString, workerIdx, workerCount)
       case OpExecWithCode(code, _) => ExecFactory.newExecFromJavaCode(code)
-      case OpExecSink(storageKey, workflowIdentity, outputMode) =>
+      case OpExecSink(storageUri, workflowIdentity, outputMode) =>
         new ProgressiveSinkOpExec(
           workerIdx,
           outputMode,
-          storageKey,
-          workflowIdentity
+          URI.create(storageUri)
         )
-      case OpExecSource(storageKey, workflowIdentity) =>
-        new CacheSourceOpExec(storageKey, workflowIdentity)
+      case OpExecSource(storageUri, _) =>
+        new CacheSourceOpExec(URI.create(storageUri))
     }
     EmptyReturn()
   }

core/amber/src/main/scala/edu/uci/ics/texera/web/ComputingUnitMaster.scala

@@ -2,7 +2,7 @@ package edu.uci.ics.texera.web
 
 import com.fasterxml.jackson.module.scala.DefaultScalaModule
 import com.typesafe.scalalogging.LazyLogging
-import edu.uci.ics.amber.core.storage.result.OpResultStorage
+import edu.uci.ics.amber.core.storage.DocumentFactory
 import edu.uci.ics.amber.core.storage.util.mongo.MongoDatabaseManager
 import edu.uci.ics.amber.core.workflow.{PhysicalPlan, WorkflowContext}
 import edu.uci.ics.amber.engine.architecture.controller.ControllerConfig
@@ -179,9 +179,9 @@ class ComputingUnitMaster extends io.dropwizard.Application[Configuration] with
         val storageType = collection.get("storageType").asText()
         val collectionName = collection.get("storageKey").asText()
         storageType match {
-          case OpResultStorage.ICEBERG =>
+          case DocumentFactory.ICEBERG =>
           // rely on the server-side result cleanup logic.
-          case OpResultStorage.MONGODB =>
+          case DocumentFactory.MONGODB =>
             MongoDatabaseManager.dropCollection(collectionName)
         }
       })

core/amber/src/main/scala/edu/uci/ics/texera/web/resource/dashboard/user/dataset/DatasetResource.scala

@@ -1,7 +1,6 @@
 package edu.uci.ics.texera.web.resource.dashboard.user.dataset
 
-import edu.uci.ics.amber.core.storage.{FileResolver, StorageConfig}
-import edu.uci.ics.amber.core.storage.model.DatasetFileDocument
+import edu.uci.ics.amber.core.storage.{DocumentFactory, FileResolver, StorageConfig}
 import edu.uci.ics.amber.core.storage.util.dataset.{
   GitVersionControlLocalFileStorage,
   PhysicalFileNode
@@ -283,7 +282,7 @@ object DatasetResource {
           }
 
           datasetOperation.filesToRemove.foreach { fileUri =>
-            new DatasetFileDocument(fileUri).clear()
+            DocumentFactory.openDocument(fileUri)._1.clear()
           }
         }
       )
@@ -820,7 +819,7 @@ class DatasetResource {
       val fileUri = FileResolver.resolve(decodedPathStr)
       val streamingOutput = new StreamingOutput() {
         override def write(output: OutputStream): Unit = {
-          val inputStream = new DatasetFileDocument(fileUri).asInputStream()
+          val inputStream = DocumentFactory.openReadonlyDocument(fileUri).asInputStream()
           try {
             val buffer = new Array[Byte](8192) // buffer size
             var bytesRead = inputStream.read(buffer)

core/amber/src/main/scala/edu/uci/ics/texera/web/resource/dashboard/user/workflow/WorkflowExecutionsResource.scala

@@ -4,6 +4,7 @@ import edu.uci.ics.amber.core.storage.StorageConfig
 import edu.uci.ics.amber.engine.architecture.logreplay.{ReplayDestination, ReplayLogRecord}
 import edu.uci.ics.amber.engine.common.storage.SequentialRecordStorage
 import edu.uci.ics.amber.core.virtualidentity.{ChannelMarkerIdentity, ExecutionIdentity}
+import edu.uci.ics.amber.engine.common.AmberConfig
 import edu.uci.ics.texera.dao.SqlServer
 import edu.uci.ics.texera.web.auth.SessionUser
 import edu.uci.ics.texera.dao.jooq.generated.Tables.{

core/amber/src/main/scala/edu/uci/ics/texera/web/service/ExecutionResultService.scala

@@ -4,8 +4,10 @@ import akka.actor.Cancellable
 import com.fasterxml.jackson.annotation.{JsonTypeInfo, JsonTypeName}
 import com.fasterxml.jackson.databind.node.ObjectNode
 import com.typesafe.scalalogging.LazyLogging
-import edu.uci.ics.amber.core.storage.StorageConfig
-import edu.uci.ics.amber.core.storage.result.OpResultStorage.MONGODB
+import edu.uci.ics.amber.core.storage.DocumentFactory.MONGODB
+import edu.uci.ics.amber.core.storage.VFSResourceType.{MATERIALIZED_RESULT, RESULT}
+import edu.uci.ics.amber.core.storage.model.VirtualDocument
+import edu.uci.ics.amber.core.storage.{DocumentFactory, StorageConfig, VFSURIFactory}
 import edu.uci.ics.amber.core.storage.result._
 import edu.uci.ics.amber.core.tuple.Tuple
 import edu.uci.ics.amber.core.workflow.{PhysicalOp, PhysicalPlan}
@@ -19,7 +21,11 @@ import edu.uci.ics.amber.engine.architecture.rpc.controlreturns.WorkflowAggregat
 import edu.uci.ics.amber.engine.common.client.AmberClient
 import edu.uci.ics.amber.engine.common.executionruntimestate.ExecutionMetadataStore
 import edu.uci.ics.amber.engine.common.{AmberConfig, AmberRuntime}
-import edu.uci.ics.amber.core.virtualidentity.{OperatorIdentity, WorkflowIdentity}
+import edu.uci.ics.amber.core.virtualidentity.{
+  ExecutionIdentity,
+  OperatorIdentity,
+  WorkflowIdentity
+}
 import edu.uci.ics.amber.core.workflow.OutputPort.OutputMode
 import edu.uci.ics.amber.core.workflow.PortIdentity
 import edu.uci.ics.texera.web.SubscriptionManager
@@ -29,7 +35,10 @@ import edu.uci.ics.texera.web.model.websocket.event.{
   WebResultUpdateEvent
 }
 import edu.uci.ics.texera.web.model.websocket.request.ResultPaginationRequest
+import edu.uci.ics.texera.web.resource.dashboard.user.workflow.WorkflowExecutionsResource
+import edu.uci.ics.texera.web.service.WorkflowExecutionService.getLatestExecutionId
 import edu.uci.ics.texera.web.storage.{ExecutionStateStore, WorkflowStateStore}
+import org.jooq.types.UInteger
 
 import java.util.UUID
 import scala.collection.mutable
@@ -60,6 +69,7 @@ object ExecutionResultService {
     */
   private def convertWebResultUpdate(
       workflowIdentity: WorkflowIdentity,
+      executionId: ExecutionIdentity,
       physicalOps: List[PhysicalOp],
       oldTupleCount: Int,
       newTupleCount: Int
@@ -85,10 +95,14 @@ object ExecutionResultService {
       }
     }
 
-    val storage =
-      ResultStorage
-        .getOpResultStorage(workflowIdentity)
-        .get(OpResultStorage.createStorageKey(physicalOps.head.id.logicalOpId, PortIdentity()))
+    val storageUri = VFSURIFactory.createResultURI(
+      workflowIdentity,
+      executionId,
+      physicalOps.head.id.logicalOpId,
+      PortIdentity()
+    )
+    val storage: VirtualDocument[Tuple] =
+      DocumentFactory.openDocument(storageUri)._1.asInstanceOf[VirtualDocument[Tuple]]
     val webUpdate = webOutputMode match {
       case PaginationMode() =>
         val numTuples = storage.getCount
@@ -167,11 +181,11 @@ class ExecutionResultService(
   private var resultUpdateCancellable: Cancellable = _
 
   def attachToExecution(
+      executionId: ExecutionIdentity,
       stateStore: ExecutionStateStore,
       physicalPlan: PhysicalPlan,
       client: AmberClient
   ): Unit = {
-
     if (resultUpdateCancellable != null && !resultUpdateCancellable.isCancelled) {
       resultUpdateCancellable.cancel()
     }
@@ -188,7 +202,7 @@ class ExecutionResultService(
                   2.seconds,
                   resultPullingFrequency.seconds
                 ) {
-                  onResultUpdate(physicalPlan)
+                  onResultUpdate(executionId, physicalPlan)
                 }
             }
           } else {
@@ -204,7 +218,7 @@ class ExecutionResultService(
             logger.info("Workflow execution terminated. Stop update results.")
             if (resultUpdateCancellable.cancel() || resultUpdateCancellable.isCancelled) {
               // immediately perform final update
-              onResultUpdate(physicalPlan)
+              onResultUpdate(executionId, physicalPlan)
             }
           }
         })
@@ -233,16 +247,20 @@ class ExecutionResultService(
               val oldInfo = oldState.resultInfo.getOrElse(opId, OperatorResultMetadata())
               buf(opId.id) = ExecutionResultService.convertWebResultUpdate(
                 workflowIdentity,
+                executionId,
                 physicalPlan.getPhysicalOpsOfLogicalOp(opId),
                 oldInfo.tupleCount,
                 info.tupleCount
               )
               if (StorageConfig.resultStorageMode == MONGODB) {
                 // using the first port for now. TODO: support multiple ports
-                val storageKey = OpResultStorage.createStorageKey(opId, PortIdentity())
-                val opStorage = ResultStorage
-                  .getOpResultStorage(workflowIdentity)
-                  .get(storageKey)
+                val storageUri = VFSURIFactory.createResultURI(
+                  workflowIdentity,
+                  executionId,
+                  opId,
+                  PortIdentity()
+                )
+                val opStorage = DocumentFactory.openDocument(storageUri)._1
                 opStorage match {
                   case mongoDocument: MongoDocument[Tuple] =>
                     val tableCatStats = mongoDocument.getCategoricalStats
@@ -278,14 +296,21 @@ class ExecutionResultService(
   def handleResultPagination(request: ResultPaginationRequest): TexeraWebSocketEvent = {
     // calculate from index (pageIndex starts from 1 instead of 0)
     val from = request.pageSize * (request.pageIndex - 1)
-
+    val latestExecutionId = getLatestExecutionId(workflowIdentity).getOrElse(
+      throw new IllegalStateException("No execution is recorded")
+    )
     // using the first port for now. TODO: support multiple ports
-    val storageKey =
-      OpResultStorage.createStorageKey(OperatorIdentity(request.operatorID), PortIdentity())
+    val storageUri = VFSURIFactory.createResultURI(
+      workflowIdentity,
+      latestExecutionId,
+      OperatorIdentity(request.operatorID),
+      PortIdentity()
+    )
     val paginationIterable = {
-      ResultStorage
-        .getOpResultStorage(workflowIdentity)
-        .get(storageKey)
+      DocumentFactory
+        .openDocument(storageUri)
+        ._1
+        .asInstanceOf[VirtualDocument[Tuple]]
         .getRange(from, from + request.pageSize)
         .to(Iterable)
     }
@@ -298,26 +323,24 @@ class ExecutionResultService(
     PaginatedResultEvent.apply(request, mappedResults, attributes)
   }
 
-  private def onResultUpdate(physicalPlan: PhysicalPlan): Unit = {
+  private def onResultUpdate(executionId: ExecutionIdentity, physicalPlan: PhysicalPlan): Unit = {
     workflowStateStore.resultStore.updateState { _ =>
       val newInfo: Map[OperatorIdentity, OperatorResultMetadata] = {
-        ResultStorage
-          .getOpResultStorage(workflowIdentity)
-          .getAllKeys
-          .filter(!_.startsWith("materialized_"))
-          .map(storageKey => {
-            val count = ResultStorage
-              .getOpResultStorage(workflowIdentity)
-              .get(storageKey)
-              .getCount
-              .toInt
-
-            val (opId, storagePortId) = OpResultStorage.decodeStorageKey(storageKey)
+        ExecutionResourcesMapping
+          .getResourceURIs(executionId)
+          .filter(uri => {
+            val (_, _, _, _, resourceType) = VFSURIFactory.decodeURI(uri)
+            resourceType != MATERIALIZED_RESULT
+          })
+          .map(uri => {
+            val count = DocumentFactory.openDocument(uri)._1.getCount.toInt
+
+            val (_, _, opId, storagePortId, _) = VFSURIFactory.decodeURI(uri)
 
             // Retrieve the mode of the specified output port
             val mode = physicalPlan
               .getPhysicalOpsOfLogicalOp(opId)
-              .flatMap(_.outputPorts.get(storagePortId))
+              .flatMap(_.outputPorts.get(storagePortId.get))
               .map(_._1.mode)
               .head
 

core/amber/src/main/scala/edu/uci/ics/texera/web/service/ResultExportService.scala

@@ -7,8 +7,9 @@ import com.google.api.services.drive.Drive
 import com.google.api.services.drive.model.{File, FileList, Permission}
 import com.google.api.services.sheets.v4.Sheets
 import com.google.api.services.sheets.v4.model.{Spreadsheet, SpreadsheetProperties, ValueRange}
+import edu.uci.ics.amber.core.storage.{DocumentFactory, VFSURIFactory}
+import edu.uci.ics.amber.core.storage.VFSResourceType.RESULT
 import edu.uci.ics.amber.core.storage.model.VirtualDocument
-import edu.uci.ics.amber.core.storage.result.{OpResultStorage, ResultStorage}
 import edu.uci.ics.amber.core.tuple.Tuple
 import edu.uci.ics.amber.engine.common.Utils.retry
 import edu.uci.ics.amber.util.PathUtils
@@ -22,6 +23,7 @@ import edu.uci.ics.texera.web.resource.dashboard.user.workflow.WorkflowVersionRe
 import org.jooq.types.UInteger
 import edu.uci.ics.amber.util.ArrowUtils
 import edu.uci.ics.amber.core.workflow.PortIdentity
+import edu.uci.ics.texera.web.service.WorkflowExecutionService.getLatestExecutionId
 
 import java.io.{PipedInputStream, PipedOutputStream}
 import java.nio.charset.StandardCharsets
@@ -56,7 +58,6 @@ class ResultExportService(workflowIdentity: WorkflowIdentity) {
   import ResultExportService._
 
   private val cache = new mutable.HashMap[String, String]
-
   def exportResult(
       user: User,
       request: ResultExportRequest
@@ -71,11 +72,17 @@ class ResultExportService(workflowIdentity: WorkflowIdentity) {
 
     // By now the workflow should finish running
     // Only supports external port 0 for now. TODO: support multiple ports
+    val storageUri = VFSURIFactory.createResultURI(
+      workflowIdentity,
+      getLatestExecutionId(workflowIdentity).getOrElse(
+        return ResultExportResponse("error", "The workflow contains no results")
+      ),
+      OperatorIdentity(request.operatorId),
+      PortIdentity()
+    )
     val operatorResult: VirtualDocument[Tuple] =
-      ResultStorage
-        .getOpResultStorage(workflowIdentity)
-        .get(OpResultStorage.createStorageKey(OperatorIdentity(request.operatorId), PortIdentity()))
-    if (operatorResult == null) {
+      DocumentFactory.openDocument(storageUri)._1.asInstanceOf[VirtualDocument[Tuple]]
+    if (operatorResult.getCount == 0) {
       return ResultExportResponse("error", "The workflow contains no results")
     }