[prism] Add internal/urns package

sdks/go/pkg/beam/runners/prism/internal/urns/urns.go

@@ -0,0 +1,128 @@
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements.  See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License.  You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package urn handles extracting urns from all the protos.
+package urns
+
+import (
+	pipepb "github.com/apache/beam/sdks/v2/go/pkg/beam/model/pipeline_v1"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type protoEnum interface {
+	~int32
+	Descriptor() protoreflect.EnumDescriptor
+}
+
+// toUrn returns a function that can get the urn string from the proto.
+func toUrn[Enum protoEnum]() func(Enum) string {
+	evd := (Enum)(0).Descriptor().Values()
+	return func(v Enum) string {
+		return proto.GetExtension(evd.ByNumber(protoreflect.EnumNumber(v)).Options(), pipepb.E_BeamUrn).(string)
+	}
+}
+
+// quickUrn handles one off urns instead of retaining a helper function.
+// Notably useful for the windowFns due to their older design.
+func quickUrn[Enum protoEnum](v Enum) string {
+	return toUrn[Enum]()(v)
+}
+
+var (
+	ptUrn   = toUrn[pipepb.StandardPTransforms_Primitives]()
+	ctUrn   = toUrn[pipepb.StandardPTransforms_Composites]()
+	cmbtUrn = toUrn[pipepb.StandardPTransforms_CombineComponents]()
+	sdfUrn  = toUrn[pipepb.StandardPTransforms_SplittableParDoComponents]()
+	siUrn   = toUrn[pipepb.StandardSideInputTypes_Enum]()
+	cdrUrn  = toUrn[pipepb.StandardCoders_Enum]()
+	reqUrn  = toUrn[pipepb.StandardRequirements_Enum]()
+	envUrn  = toUrn[pipepb.StandardEnvironments_Environments]()
+)
+
+var (
+	// SDK transforms.
+	TransformParDo                = ptUrn(pipepb.StandardPTransforms_PAR_DO)
+	TransformCombinePerKey        = ctUrn(pipepb.StandardPTransforms_COMBINE_PER_KEY)
+	TransformPreCombine           = cmbtUrn(pipepb.StandardPTransforms_COMBINE_PER_KEY_PRECOMBINE)
+	TransformMerge                = cmbtUrn(pipepb.StandardPTransforms_COMBINE_PER_KEY_MERGE_ACCUMULATORS)
+	TransformExtract              = cmbtUrn(pipepb.StandardPTransforms_COMBINE_PER_KEY_EXTRACT_OUTPUTS)
+	TransformPairWithRestriction  = sdfUrn(pipepb.StandardPTransforms_PAIR_WITH_RESTRICTION)
+	TransformSplitAndSize         = sdfUrn(pipepb.StandardPTransforms_SPLIT_AND_SIZE_RESTRICTIONS)
+	TransformProcessSizedElements = sdfUrn(pipepb.StandardPTransforms_PROCESS_SIZED_ELEMENTS_AND_RESTRICTIONS)
+	TransformTruncate             = sdfUrn(pipepb.StandardPTransforms_TRUNCATE_SIZED_RESTRICTION)
+
+	// Window Manipulation
+	TransformAssignWindows = ptUrn(pipepb.StandardPTransforms_ASSIGN_WINDOWS)
+	TransformMapWindows    = ptUrn(pipepb.StandardPTransforms_MAP_WINDOWS)
+	TransformMergeWindows  = ptUrn(pipepb.StandardPTransforms_MERGE_WINDOWS)
+
+	// Undocumented Urns
+	GoDoFn          = "beam:go:transform:dofn:v1" // Only used for Go DoFn.
+	TransformSource = "beam:runner:source:v1"     // The data source reading transform.
+	TransformSink   = "beam:runner:sink:v1"       // The data sink writing transform.
+
+	// Runner transforms.
+	TransformImpulse = ptUrn(pipepb.StandardPTransforms_IMPULSE)
+	TransformGBK     = ptUrn(pipepb.StandardPTransforms_GROUP_BY_KEY)
+	TransformFlatten = ptUrn(pipepb.StandardPTransforms_FLATTEN)
+
+	// Side Input access patterns
+	SideInputIterable = siUrn(pipepb.StandardSideInputTypes_ITERABLE)
+	SideInputMultiMap = siUrn(pipepb.StandardSideInputTypes_MULTIMAP)
+
+	// WindowsFns
+	WindowFnGlobal  = quickUrn(pipepb.GlobalWindowsPayload_PROPERTIES)
+	WindowFnFixed   = quickUrn(pipepb.FixedWindowsPayload_PROPERTIES)
+	WindowFnSliding = quickUrn(pipepb.SlidingWindowsPayload_PROPERTIES)
+	WindowFnSession = quickUrn(pipepb.SessionWindowsPayload_PROPERTIES)
+
+	// Coders
+	CoderBytes      = cdrUrn(pipepb.StandardCoders_BYTES)
+	CoderBool       = cdrUrn(pipepb.StandardCoders_BOOL)
+	CoderDouble     = cdrUrn(pipepb.StandardCoders_DOUBLE)
+	CoderStringUTF8 = cdrUrn(pipepb.StandardCoders_STRING_UTF8)
+	CoderRow        = cdrUrn(pipepb.StandardCoders_ROW)
+	CoderVarInt     = cdrUrn(pipepb.StandardCoders_VARINT)
+
+	CoderGlobalWindow   = cdrUrn(pipepb.StandardCoders_GLOBAL_WINDOW)
+	CoderIntervalWindow = cdrUrn(pipepb.StandardCoders_INTERVAL_WINDOW)
+	CoderCustomWindow   = cdrUrn(pipepb.StandardCoders_CUSTOM_WINDOW)
+
+	CoderParamWindowedValue = cdrUrn(pipepb.StandardCoders_PARAM_WINDOWED_VALUE)
+	CoderWindowedValue      = cdrUrn(pipepb.StandardCoders_WINDOWED_VALUE)
+	CoderTimer              = cdrUrn(pipepb.StandardCoders_TIMER)
+
+	CoderKV                  = cdrUrn(pipepb.StandardCoders_KV)
+	CoderLengthPrefix        = cdrUrn(pipepb.StandardCoders_LENGTH_PREFIX)
+	CoderNullable            = cdrUrn(pipepb.StandardCoders_NULLABLE)
+	CoderIterable            = cdrUrn(pipepb.StandardCoders_ITERABLE)
+	CoderStateBackedIterable = cdrUrn(pipepb.StandardCoders_STATE_BACKED_ITERABLE)
+	CoderShardedKey          = cdrUrn(pipepb.StandardCoders_SHARDED_KEY)
+
+	// Requirements
+	RequirementSplittableDoFn     = reqUrn(pipepb.StandardRequirements_REQUIRES_SPLITTABLE_DOFN)
+	RequirementBundleFinalization = reqUrn(pipepb.StandardRequirements_REQUIRES_BUNDLE_FINALIZATION)
+	RequirementOnWindowExpiration = reqUrn(pipepb.StandardRequirements_REQUIRES_ON_WINDOW_EXPIRATION)
+	RequirementStableInput        = reqUrn(pipepb.StandardRequirements_REQUIRES_STABLE_INPUT)
+	RequirementStatefulProcessing = reqUrn(pipepb.StandardRequirements_REQUIRES_STATEFUL_PROCESSING)
+	RequirementTimeSortedInput    = reqUrn(pipepb.StandardRequirements_REQUIRES_TIME_SORTED_INPUT)
+
+	// Environment types
+	EnvDocker   = envUrn(pipepb.StandardEnvironments_DOCKER)
+	EnvProcess  = envUrn(pipepb.StandardEnvironments_PROCESS)
+	EnvExternal = envUrn(pipepb.StandardEnvironments_EXTERNAL)
+	EnvDefault  = envUrn(pipepb.StandardEnvironments_DEFAULT)
+)

sdks/go/pkg/beam/runners/prism/internal/urns/urns_test.go

@@ -0,0 +1,36 @@
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements.  See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License.  You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package urn handles extracting urns from all the protos.
+package urns
+
+import (
+	"testing"
+
+	pipepb "github.com/apache/beam/sdks/v2/go/pkg/beam/model/pipeline_v1"
+)
+
+// Test_toUrn validates that generic urn extraction mechnanism works, which is used for
+// all the urns present.
+func Test_toUrn(t *testing.T) {
+	want := "beam:transform:pardo:v1"
+	if got := TransformParDo; got != want {
+		t.Errorf("TransformParDo = %v, want %v", got, want)
+	}
+	// Validate that quickUrn gets the same thing
+	if got := quickUrn(pipepb.StandardPTransforms_PAR_DO); got != want {
+		t.Errorf("quickUrn(\"pipepb.StandardPTransforms_PAR_DO\") = %v, want %v", got, want)
+	}
+}