| // 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 ( |
| "fmt" |
| "github.com/apache/beam/sdks/go/pkg/beam" |
| "github.com/apache/beam/sdks/go/pkg/beam/core/graph/window" |
| "time" |
| ) |
| |
| func ApplyTransform(s beam.Scope, input beam.PCollection) beam.PCollection { |
| windowed := beam.WindowInto(s, window.NewFixedWindows(time.Hour), input) |
| return beam.ParDo(s, timestampFn, windowed) |
| } |
| |
| func timestampFn(iw beam.Window, et beam.EventTime, line string) Commit { |
| return Commit{ |
| MaxTimestampWindow: toTime(iw.MaxTimestamp()), |
| EventTimestamp: toTime(et), |
| Line: line, |
| } |
| } |
| |
| func toTime(et beam.EventTime) time.Time { |
| return time.Unix(0, et.Milliseconds() * int64(time.Millisecond)) |
| } |
| |
| type Commit struct { |
| MaxTimestampWindow time.Time |
| EventTimestamp time.Time |
| Line string |
| } |
| |
| func (c Commit) String() string { |
| return fmt.Sprintf("Window ending at: %v contains timestamp: %v for commit: \"%s\"", |
| c.MaxTimestampWindow.Format(time.Kitchen), |
| c.EventTimestamp.Format(time.Kitchen), |
| c.Line) |
| } |
| |