/
window_panes.go
55 lines (47 loc) · 1.96 KB
/
window_panes.go
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// 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 primitives
import (
"time"
"github.com/apache/beam/sdks/v2/go/pkg/beam"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/graph/window"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/graph/window/trigger"
"github.com/apache/beam/sdks/v2/go/pkg/beam/register"
"github.com/apache/beam/sdks/v2/go/pkg/beam/testing/passert"
"github.com/apache/beam/sdks/v2/go/pkg/beam/testing/teststream"
)
func init() {
register.Function3x0(panesFn)
register.Emitter1[int]()
}
// panesFn is DoFn that simply emits the pane timing value.
func panesFn(pn beam.PaneInfo, value float64, emit func(int)) {
emit(int(pn.Timing))
}
// Panes constructs a teststream and applies a pardo to get the pane timings.
func Panes(s beam.Scope) {
s.Scope("increment")
con := teststream.NewConfig()
con.AddElements(1000, 1.0, 2.0, 3.0)
con.AdvanceWatermark(11000)
col := teststream.Create(s, con)
windowSize := 10 * time.Second
windowed := beam.WindowInto(s, window.NewFixedWindows(windowSize), col, []beam.WindowIntoOption{
beam.Trigger(trigger.Always()),
}...)
sums := beam.ParDo(s, panesFn, windowed)
sums = beam.WindowInto(s, window.NewGlobalWindows(), sums)
passert.Count(s, sums, "number of firings", 3)
}