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transformer.go
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transformer.go
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package datacatalog
import (
"context"
"encoding/base64"
"fmt"
"reflect"
"strconv"
"strings"
"github.com/flyteorg/flyte/flyteidl/gen/pb-go/flyteidl/core"
"github.com/flyteorg/flyte/flyteidl/gen/pb-go/flyteidl/datacatalog"
"github.com/flyteorg/flyte/flyteplugins/go/tasks/pluginmachinery/catalog"
"github.com/flyteorg/flyte/flytepropeller/pkg/compiler/validators"
"github.com/flyteorg/flyte/flytestdlib/pbhash"
)
const cachedTaskTag = "flyte_cached"
const taskNamespace = "flyte_task"
const maxParamHashLength = 8
// Declare the definition of empty literal and variable maps. This is important because we hash against
// the literal and variable maps. So Nil and empty literals and variable maps should translate to these definitions
// in order to have a consistent hash.
var emptyLiteralMap = core.LiteralMap{Literals: map[string]*core.Literal{}}
var emptyVariableMap = core.VariableMap{Variables: map[string]*core.Variable{}}
func getDatasetNameFromTask(taskID core.Identifier) string {
return fmt.Sprintf("%s-%s", taskNamespace, taskID.Name)
}
// Transform the artifact Data into task execution outputs as a literal map
func GenerateTaskOutputsFromArtifact(id core.Identifier, taskInterface core.TypedInterface, artifact *datacatalog.Artifact) (*core.LiteralMap, error) {
// if there are no outputs in the task, return empty map
if taskInterface.Outputs == nil || len(taskInterface.Outputs.Variables) == 0 {
return &emptyLiteralMap, nil
}
outputVariables := taskInterface.Outputs.Variables
artifactDataList := artifact.Data
// verify the task outputs matches what is stored in ArtifactData
if len(outputVariables) != len(artifactDataList) {
return nil, fmt.Errorf("the task %s with %d outputs, should have %d artifactData for artifact %s", id.String(), len(outputVariables), len(artifactDataList), artifact.Id)
}
outputs := make(map[string]*core.Literal, len(artifactDataList))
for _, artifactData := range artifactDataList {
// verify that the name and type of artifactData matches what is expected from the interface
if _, ok := outputVariables[artifactData.Name]; !ok {
return nil, fmt.Errorf("unexpected artifactData with name [%v] does not match any task output variables %v", artifactData.Name, reflect.ValueOf(outputVariables).MapKeys())
}
expectedVarType := outputVariables[artifactData.Name].GetType()
inputType := validators.LiteralTypeForLiteral(artifactData.Value)
if !validators.AreTypesCastable(inputType, expectedVarType) {
return nil, fmt.Errorf("unexpected artifactData: [%v] type: [%v] does not match any task output type: [%v]", artifactData.Name, inputType, expectedVarType)
}
outputs[artifactData.Name] = artifactData.Value
}
return &core.LiteralMap{Literals: outputs}, nil
}
func generateDataSetVersionFromTask(ctx context.Context, taskInterface core.TypedInterface, cacheVersion string) (string, error) {
signatureHash, err := generateTaskSignatureHash(ctx, taskInterface)
if err != nil {
return "", err
}
cacheVersion = strings.Trim(cacheVersion, " ")
if len(cacheVersion) == 0 {
return "", fmt.Errorf("task cannot have an empty discoveryVersion %v", cacheVersion)
}
return fmt.Sprintf("%s-%s", cacheVersion, signatureHash), nil
}
func generateTaskSignatureHash(ctx context.Context, taskInterface core.TypedInterface) (string, error) {
taskInputs := &emptyVariableMap
taskOutputs := &emptyVariableMap
if taskInterface.Inputs != nil && len(taskInterface.Inputs.Variables) != 0 {
taskInputs = taskInterface.Inputs
}
if taskInterface.Outputs != nil && len(taskInterface.Outputs.Variables) != 0 {
taskOutputs = taskInterface.Outputs
}
inputHash, err := pbhash.ComputeHash(ctx, taskInputs)
if err != nil {
return "", err
}
outputHash, err := pbhash.ComputeHash(ctx, taskOutputs)
if err != nil {
return "", err
}
inputHashString := base64.RawURLEncoding.EncodeToString(inputHash)
if len(inputHashString) > maxParamHashLength {
inputHashString = inputHashString[0:maxParamHashLength]
}
outputHashString := base64.RawURLEncoding.EncodeToString(outputHash)
if len(outputHashString) > maxParamHashLength {
outputHashString = outputHashString[0:maxParamHashLength]
}
return fmt.Sprintf("%v-%v", inputHashString, outputHashString), nil
}
// Generate a tag by hashing the input values which are not in cacheIgnoreInputVars
func GenerateArtifactTagName(ctx context.Context, inputs *core.LiteralMap, cacheIgnoreInputVars []string) (string, error) {
hashString, err := catalog.HashLiteralMap(ctx, inputs, cacheIgnoreInputVars)
if err != nil {
return "", err
}
tag := fmt.Sprintf("%s-%s", cachedTaskTag, hashString)
return tag, nil
}
// Get the DataSetID for a task.
// NOTE: the version of the task is a combination of both the discoverable_version and the task signature.
// This is because the interface may of changed even if the discoverable_version hadn't.
func GenerateDatasetIDForTask(ctx context.Context, k catalog.Key) (*datacatalog.DatasetID, error) {
datasetVersion, err := generateDataSetVersionFromTask(ctx, k.TypedInterface, k.CacheVersion)
if err != nil {
return nil, err
}
datasetID := &datacatalog.DatasetID{
Project: k.Identifier.Project,
Domain: k.Identifier.Domain,
Name: getDatasetNameFromTask(k.Identifier),
Version: datasetVersion,
}
return datasetID, nil
}
func DatasetIDToIdentifier(id *datacatalog.DatasetID) *core.Identifier {
if id == nil {
return nil
}
return &core.Identifier{ResourceType: core.ResourceType_DATASET, Name: id.Name, Project: id.Project, Domain: id.Domain, Version: id.Version}
}
// With Node-Node relationship this is bound to change. So lets keep it extensible
const (
taskVersionKey = "task-version"
execNameKey = "execution-name"
execDomainKey = "exec-domain"
execProjectKey = "exec-project"
execNodeIDKey = "exec-node"
execTaskAttemptKey = "exec-attempt"
)
// Understanding Catalog Identifiers
// DatasetID represents the ID of the dataset. For Flyte this represents the ID of the generating task and the version calculated as the hash of the interface & cache version. refer to `GenerateDatasetIDForTask`
// TaskID is the same as the DatasetID + name: (DataSetID - namespace) + task version which is stored in the metadata
// ExecutionID is stored only in the metadata (project and domain available after Jul-2020)
// NodeExecID = Execution ID + Node ID (available after Jul-2020)
// TaskExecID is the same as the NodeExecutionID + attempt (attempt is available in Metadata) after Jul-2020
func GetDatasetMetadataForSource(taskExecutionID *core.TaskExecutionIdentifier) *datacatalog.Metadata {
if taskExecutionID == nil {
return &datacatalog.Metadata{}
}
return &datacatalog.Metadata{
KeyMap: map[string]string{
taskVersionKey: taskExecutionID.TaskId.Version,
},
}
}
func GetArtifactMetadataForSource(taskExecutionID *core.TaskExecutionIdentifier) *datacatalog.Metadata {
if taskExecutionID == nil {
return &datacatalog.Metadata{}
}
return &datacatalog.Metadata{
KeyMap: map[string]string{
execProjectKey: taskExecutionID.NodeExecutionId.GetExecutionId().GetProject(),
execDomainKey: taskExecutionID.NodeExecutionId.GetExecutionId().GetDomain(),
execNameKey: taskExecutionID.NodeExecutionId.GetExecutionId().GetName(),
execNodeIDKey: taskExecutionID.NodeExecutionId.GetNodeId(),
execTaskAttemptKey: strconv.Itoa(int(taskExecutionID.GetRetryAttempt())),
},
}
}
// GetSourceFromMetadata returns the Source TaskExecutionIdentifier from the catalog metadata
// For all the information not available it returns Unknown. This is because as of July-2020 Catalog does not have all
// the information. After the first deployment of this code, it will have this and the "unknown's" can be phased out
func GetSourceFromMetadata(datasetMd, artifactMd *datacatalog.Metadata, currentID core.Identifier) (*core.TaskExecutionIdentifier, error) {
if datasetMd == nil || datasetMd.KeyMap == nil {
datasetMd = &datacatalog.Metadata{KeyMap: map[string]string{}}
}
if artifactMd == nil || artifactMd.KeyMap == nil {
artifactMd = &datacatalog.Metadata{KeyMap: map[string]string{}}
}
// Jul-06-2020 DataCatalog stores only wfExecutionKey & taskVersionKey So we will default the project / domain to the current dataset's project domain
val := GetOrDefault(artifactMd.KeyMap, execTaskAttemptKey, "0")
attempt, err := strconv.ParseUint(val, 10, 32)
if err != nil {
return nil, fmt.Errorf("failed to parse [%v] to integer. Error: %w", val, err)
}
return &core.TaskExecutionIdentifier{
TaskId: &core.Identifier{
ResourceType: currentID.ResourceType,
Project: currentID.Project,
Domain: currentID.Domain,
Name: currentID.Name,
Version: GetOrDefault(datasetMd.KeyMap, taskVersionKey, "unknown"),
},
RetryAttempt: uint32(attempt),
NodeExecutionId: &core.NodeExecutionIdentifier{
NodeId: GetOrDefault(artifactMd.KeyMap, execNodeIDKey, "unknown"),
ExecutionId: &core.WorkflowExecutionIdentifier{
Project: GetOrDefault(artifactMd.KeyMap, execProjectKey, currentID.GetProject()),
Domain: GetOrDefault(artifactMd.KeyMap, execDomainKey, currentID.GetDomain()),
Name: GetOrDefault(artifactMd.KeyMap, execNameKey, "unknown"),
},
},
}, nil
}
// Given the Catalog Information (returned from a Catalog call), returns the CatalogMetadata that is populated in the event.
func EventCatalogMetadata(datasetID *datacatalog.DatasetID, tag *datacatalog.Tag, sourceID *core.TaskExecutionIdentifier) *core.CatalogMetadata {
md := &core.CatalogMetadata{
DatasetId: DatasetIDToIdentifier(datasetID),
}
if tag != nil {
md.ArtifactTag = &core.CatalogArtifactTag{
ArtifactId: tag.ArtifactId,
Name: tag.Name,
}
}
if sourceID != nil {
md.SourceExecution = &core.CatalogMetadata_SourceTaskExecution{
SourceTaskExecution: sourceID,
}
}
return md
}
// Returns a default value, if the given key is not found in the map, else returns the value in the map
func GetOrDefault(m map[string]string, key, defaultValue string) string {
v, ok := m[key]
if !ok {
return defaultValue
}
return v
}