/
strategy.go
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/
strategy.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 window contains window representation, windowing strategies and utilities.
package window
import "github.com/apache/beam/sdks/v2/go/pkg/beam/core/graph/window/trigger"
type AccumulationMode string
const (
Unspecified AccumulationMode = "AccumulationMode_UNSPECIFIED"
Discarding AccumulationMode = "AccumulationMode_DISCARDING"
Accumulating AccumulationMode = "AccumulationMode_ACCUMULATING"
Retracting AccumulationMode = "AccumulationMode_RETRACTING"
)
// WindowingStrategy defines the types of windowing used in a pipeline and contains
// the data to support executing a windowing strategy.
type WindowingStrategy struct {
Fn *Fn
Trigger trigger.Trigger
AccumulationMode AccumulationMode
AllowedLateness int // in milliseconds
}
func (ws *WindowingStrategy) Equals(o *WindowingStrategy) bool {
return ws.Fn.Equals(o.Fn)
}
func (ws *WindowingStrategy) String() string {
return ws.Fn.String()
}
// DefaultWindowingStrategy returns the default windowing strategy.
func DefaultWindowingStrategy() *WindowingStrategy {
return &WindowingStrategy{Fn: NewGlobalWindows(), Trigger: trigger.Default(), AccumulationMode: Discarding, AllowedLateness: 0}
}