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Posted to commits@beam.apache.org by lo...@apache.org on 2020/06/01 15:50:39 UTC

[beam] branch master updated: [BEAM-9679] Add Combine/Simple Function to Core Transforms (#11866)

This is an automated email from the ASF dual-hosted git repository.

lostluck pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/beam.git


The following commit(s) were added to refs/heads/master by this push:
     new e0217d1  [BEAM-9679] Add Combine/Simple Function to Core Transforms (#11866)
e0217d1 is described below

commit e0217d1efa00d37ef66db040d06da610ea9e8c99
Author: Damon Douglas <da...@users.noreply.github.com>
AuthorDate: Mon Jun 1 08:50:22 2020 -0700

    [BEAM-9679] Add Combine/Simple Function to Core Transforms (#11866)
---
 .../Combine/Simple Function/cmd/main.go            |  43 +++
 .../Core Transforms/Combine/Simple Function/go.mod |  27 ++
 .../Core Transforms/Combine/Simple Function/go.sum | 310 +++++++++++++++++++++
 .../Combine/Simple Function/pkg/task/task.go       |  26 ++
 .../Simple Function/task-info.yaml}                |  21 +-
 .../Combine/Simple Function/task-remote-info.yaml  |   2 +
 .../Combine/Simple Function/task.md                |  43 +++
 .../Combine/Simple Function/test/task_test.go      |  44 +++
 .../lesson-info.yaml}                              |   5 +-
 .../Combine/lesson-remote-info.yaml                |   3 +
 .../Flatten/lesson-remote-info.yaml                |   2 +-
 .../katas/go/Core Transforms/section-info.yaml     |   1 +
 learning/katas/go/course-remote-info.yaml          |   2 +-
 13 files changed, 518 insertions(+), 11 deletions(-)

diff --git a/learning/katas/go/Core Transforms/Combine/Simple Function/cmd/main.go b/learning/katas/go/Core Transforms/Combine/Simple Function/cmd/main.go
new file mode 100644
index 0000000..eb41397
--- /dev/null
+++ b/learning/katas/go/Core Transforms/Combine/Simple Function/cmd/main.go	
@@ -0,0 +1,43 @@
+// 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 main
+
+import (
+	"context"
+	"github.com/apache/beam/sdks/go/pkg/beam"
+	"github.com/apache/beam/sdks/go/pkg/beam/log"
+	"github.com/apache/beam/sdks/go/pkg/beam/x/beamx"
+	"github.com/apache/beam/sdks/go/pkg/beam/x/debug"
+	"simple_function/pkg/task"
+)
+
+func main() {
+	ctx := context.Background()
+
+	p, s := beam.NewPipelineWithRoot()
+
+	input := beam.Create(s, 10, 30, 50, 70, 90)
+
+	output := task.ApplyTransform(s, input)
+
+	debug.Print(s, output)
+
+	err := beamx.Run(ctx, p)
+
+	if err != nil {
+		log.Exitf(context.Background(), "Failed to execute job: %v", err)
+	}
+}
diff --git a/learning/katas/go/Core Transforms/Combine/Simple Function/go.mod b/learning/katas/go/Core Transforms/Combine/Simple Function/go.mod
new file mode 100644
index 0000000..f8cdb28
--- /dev/null
+++ b/learning/katas/go/Core Transforms/Combine/Simple Function/go.mod	
@@ -0,0 +1,27 @@
+// 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.
+
+module simple_function
+
+go 1.14
+
+require (
+	github.com/apache/beam v2.21.0+incompatible
+	github.com/golang/protobuf v1.4.2 // indirect
+	github.com/google/go-cmp v0.4.1 // indirect
+	github.com/googleapis/gax-go v1.0.3 // indirect
+	google.golang.org/api v0.25.0 // indirect
+	google.golang.org/grpc v1.29.1 // indirect
+)
diff --git a/learning/katas/go/Core Transforms/Combine/Simple Function/go.sum b/learning/katas/go/Core Transforms/Combine/Simple Function/go.sum
new file mode 100644
index 0000000..00ef759
--- /dev/null
+++ b/learning/katas/go/Core Transforms/Combine/Simple Function/go.sum	
@@ -0,0 +1,310 @@
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diff --git a/learning/katas/go/Core Transforms/Combine/Simple Function/pkg/task/task.go b/learning/katas/go/Core Transforms/Combine/Simple Function/pkg/task/task.go
new file mode 100644
index 0000000..afe5abb
--- /dev/null
+++ b/learning/katas/go/Core Transforms/Combine/Simple Function/pkg/task/task.go	
@@ -0,0 +1,26 @@
+// 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 task
+
+import (
+	"github.com/apache/beam/sdks/go/pkg/beam"
+)
+
+func ApplyTransform(s beam.Scope, input beam.PCollection) beam.PCollection {
+	return beam.Combine(s, func(sum, elem int) int {
+		return sum + elem
+	}, input)
+}
diff --git a/learning/katas/go/Core Transforms/section-info.yaml b/learning/katas/go/Core Transforms/Combine/Simple Function/task-info.yaml
similarity index 74%
copy from learning/katas/go/Core Transforms/section-info.yaml
copy to learning/katas/go/Core Transforms/Combine/Simple Function/task-info.yaml
index d228f9a..1b3b8e5 100644
--- a/learning/katas/go/Core Transforms/section-info.yaml	
+++ b/learning/katas/go/Core Transforms/Combine/Simple Function/task-info.yaml	
@@ -17,8 +17,19 @@
 # under the License.
 #
 
-content:
-- Map
-- GroupByKey
-- CoGroupByKey
-- Flatten
+type: edu
+files:
+- name: test/task_test.go
+  visible: false
+- name: cmd/main.go
+  visible: true
+- name: go.mod
+  visible: false
+- name: pkg/task/task.go
+  visible: true
+  placeholders:
+  - offset: 949
+    length: 72
+    placeholder_text: TODO()
+- name: go.sum
+  visible: false
diff --git a/learning/katas/go/Core Transforms/Combine/Simple Function/task-remote-info.yaml b/learning/katas/go/Core Transforms/Combine/Simple Function/task-remote-info.yaml
new file mode 100644
index 0000000..098280d
--- /dev/null
+++ b/learning/katas/go/Core Transforms/Combine/Simple Function/task-remote-info.yaml	
@@ -0,0 +1,2 @@
+id: 1347871
+update_date: Mon, 01 Jun 2020 14:35:52 UTC
diff --git a/learning/katas/go/Core Transforms/Combine/Simple Function/task.md b/learning/katas/go/Core Transforms/Combine/Simple Function/task.md
new file mode 100644
index 0000000..ea0cc8c
--- /dev/null
+++ b/learning/katas/go/Core Transforms/Combine/Simple Function/task.md	
@@ -0,0 +1,43 @@
+<!--
+  ~  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.
+  -->
+
+# Combine - Simple Function
+
+Combine is a Beam transform for combining collections of elements or values in your data. When you 
+apply a Combine transform, you must provide the function that contains the logic for combining the 
+elements or values. The combining function should be commutative and associative, as the function 
+is not necessarily invoked exactly once on all values with a given key. Because the input data 
+(including the value collection) may be distributed across multiple workers, the combining function 
+might be called multiple times to perform partial combining on subsets of the value collection.
+
+Simple combine operations, such as sums, can usually be implemented as a simple function.
+
+**Kata:** Implement the summation of numbers using 
+[beam.Combine](https://godoc.org/github.com/apache/beam/sdks/go/pkg/beam#Combine).
+
+<div class="hint">
+  Implement a combine function compatible with the
+  <a href="https://godoc.org/github.com/apache/beam/sdks/go/pkg/beam#Combine">
+    beam.Combine</a> method that performs the summation of a PCollection&lt;int&gt;.
+</div>
+
+<div class="hint">
+  Refer to the Beam Programming Guide
+  <a href="https://beam.apache.org/documentation/programming-guide/#simple-combines">
+    "Simple combinations using simple functions"</a> section for more information.
+</div>
diff --git a/learning/katas/go/Core Transforms/Combine/Simple Function/test/task_test.go b/learning/katas/go/Core Transforms/Combine/Simple Function/test/task_test.go
new file mode 100644
index 0000000..2b0ff0c
--- /dev/null
+++ b/learning/katas/go/Core Transforms/Combine/Simple Function/test/task_test.go	
@@ -0,0 +1,44 @@
+// 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 test
+
+import (
+	"github.com/apache/beam/sdks/go/pkg/beam"
+	"github.com/apache/beam/sdks/go/pkg/beam/testing/passert"
+	"github.com/apache/beam/sdks/go/pkg/beam/testing/ptest"
+	"simple_function/pkg/task"
+	"testing"
+)
+
+func TestApplyTransform(t *testing.T) {
+	p, s := beam.NewPipelineWithRoot()
+	tests := []struct {
+		input beam.PCollection
+		want []interface{}
+	}{
+		{
+			input: beam.Create(s, 10, 30, 50, 70, 90),
+			want: []interface{}{250},
+		},
+	}
+	for _, tt := range tests {
+		got := task.ApplyTransform(s, tt.input)
+		passert.Equals(s, got, tt.want...)
+		if err := ptest.Run(p); err != nil {
+			t.Error(err)
+		}
+	}
+}
diff --git a/learning/katas/go/Core Transforms/section-info.yaml b/learning/katas/go/Core Transforms/Combine/lesson-info.yaml
similarity index 94%
copy from learning/katas/go/Core Transforms/section-info.yaml
copy to learning/katas/go/Core Transforms/Combine/lesson-info.yaml
index d228f9a..698fc8c 100644
--- a/learning/katas/go/Core Transforms/section-info.yaml	
+++ b/learning/katas/go/Core Transforms/Combine/lesson-info.yaml	
@@ -18,7 +18,4 @@
 #
 
 content:
-- Map
-- GroupByKey
-- CoGroupByKey
-- Flatten
+- Simple Function
diff --git a/learning/katas/go/Core Transforms/Combine/lesson-remote-info.yaml b/learning/katas/go/Core Transforms/Combine/lesson-remote-info.yaml
new file mode 100644
index 0000000..3747bd2
--- /dev/null
+++ b/learning/katas/go/Core Transforms/Combine/lesson-remote-info.yaml	
@@ -0,0 +1,3 @@
+id: 362667
+update_date: Mon, 01 Jun 2020 14:35:48 UTC
+unit: 347283
diff --git a/learning/katas/go/Core Transforms/Flatten/lesson-remote-info.yaml b/learning/katas/go/Core Transforms/Flatten/lesson-remote-info.yaml
index f7ed569..a6b715b 100644
--- a/learning/katas/go/Core Transforms/Flatten/lesson-remote-info.yaml	
+++ b/learning/katas/go/Core Transforms/Flatten/lesson-remote-info.yaml	
@@ -1,3 +1,3 @@
 id: 361641
-update_date: Thu, 28 May 2020 22:33:26 UTC
+update_date: Mon, 01 Jun 2020 14:35:55 UTC
 unit: 346170
diff --git a/learning/katas/go/Core Transforms/section-info.yaml b/learning/katas/go/Core Transforms/section-info.yaml
index d228f9a..8bde6d1 100644
--- a/learning/katas/go/Core Transforms/section-info.yaml	
+++ b/learning/katas/go/Core Transforms/section-info.yaml	
@@ -21,4 +21,5 @@ content:
 - Map
 - GroupByKey
 - CoGroupByKey
+- Combine
 - Flatten
diff --git a/learning/katas/go/course-remote-info.yaml b/learning/katas/go/course-remote-info.yaml
index b875f83..ce7ead8 100644
--- a/learning/katas/go/course-remote-info.yaml
+++ b/learning/katas/go/course-remote-info.yaml
@@ -1,2 +1,2 @@
 id: 70387
-update_date: Wed, 20 May 2020 06:16:18 UTC
+update_date: Thu, 28 May 2020 22:34:30 UTC