github.com/apache/beam/sdks/v2@v2.48.2/go/test/load/pardo/pardo.go (about)

     1  // Licensed to the Apache Software Foundation (ASF) under one or more
     2  // contributor license agreements.  See the NOTICE file distributed with
     3  // this work for additional information regarding copyright ownership.
     4  // The ASF licenses this file to You under the Apache License, Version 2.0
     5  // (the "License"); you may not use this file except in compliance with
     6  // the License.  You may obtain a copy of the License at
     7  //
     8  //    http://www.apache.org/licenses/LICENSE-2.0
     9  //
    10  // Unless required by applicable law or agreed to in writing, software
    11  // distributed under the License is distributed on an "AS IS" BASIS,
    12  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  // See the License for the specific language governing permissions and
    14  // limitations under the License.
    15  
    16  package main
    17  
    18  import (
    19  	"context"
    20  	"flag"
    21  	"fmt"
    22  
    23  	"github.com/apache/beam/sdks/v2/go/pkg/beam"
    24  	"github.com/apache/beam/sdks/v2/go/pkg/beam/io/synthetic"
    25  	"github.com/apache/beam/sdks/v2/go/pkg/beam/log"
    26  	"github.com/apache/beam/sdks/v2/go/pkg/beam/register"
    27  	"github.com/apache/beam/sdks/v2/go/pkg/beam/x/beamx"
    28  	"github.com/apache/beam/sdks/v2/go/test/load"
    29  )
    30  
    31  var (
    32  	iterations = flag.Int(
    33  		"iterations",
    34  		1,
    35  		"A number of subsequent ParDo transforms to be performed.")
    36  	numCounters = flag.Int(
    37  		"number_of_counters",
    38  		0,
    39  		"A number of counter metrics to be created.")
    40  	operations = flag.Int(
    41  		"number_of_counter_operations",
    42  		0,
    43  		"A number of increments to be performed for each counter.")
    44  	syntheticConfig = flag.String(
    45  		"input_options",
    46  		"",
    47  		"A JSON object that describes the configuration for synthetic source.")
    48  )
    49  
    50  func init() {
    51  	register.DoFn4x0[context.Context, []byte, []byte, func([]byte, []byte)]((*counterOperationFn)(nil))
    52  	register.Emitter2[[]byte, []byte]()
    53  }
    54  
    55  type counterOperationFn struct {
    56  	Operations, NumCounters int
    57  	counters                []beam.Counter
    58  }
    59  
    60  func newCounterOperationFn(operations, numCounters int) *counterOperationFn {
    61  	return &counterOperationFn{
    62  		Operations:  operations,
    63  		NumCounters: numCounters,
    64  	}
    65  }
    66  
    67  func (fn *counterOperationFn) Setup() {
    68  	fn.counters = make([]beam.Counter, fn.NumCounters)
    69  	for i := 0; i < fn.NumCounters; i++ {
    70  		fn.counters[i] = beam.NewCounter("counterOperationFn", fmt.Sprint("counter-", i))
    71  	}
    72  }
    73  
    74  func (fn *counterOperationFn) ProcessElement(ctx context.Context, key []byte, value []byte, emit func([]byte, []byte)) {
    75  	for i := 0; i < fn.Operations; i++ {
    76  		for _, counter := range fn.counters {
    77  			counter.Inc(ctx, 1)
    78  		}
    79  	}
    80  	emit(key, value)
    81  }
    82  
    83  func parseSyntheticConfig() synthetic.SourceConfig {
    84  	if *syntheticConfig == "" {
    85  		panic("--input_options not provided")
    86  	} else {
    87  		encoded := []byte(*syntheticConfig)
    88  		return synthetic.DefaultSourceConfig().BuildFromJSON(encoded)
    89  	}
    90  }
    91  
    92  func main() {
    93  	flag.Parse()
    94  	beam.Init()
    95  	ctx := context.Background()
    96  
    97  	p, s := beam.NewPipelineWithRoot()
    98  
    99  	src := synthetic.SourceSingle(s, parseSyntheticConfig())
   100  
   101  	pcoll := beam.ParDo(s, &load.RuntimeMonitor{}, src)
   102  
   103  	for i := 0; i < *iterations; i++ {
   104  		pcoll = beam.ParDo(s, newCounterOperationFn(*operations, *numCounters), pcoll)
   105  	}
   106  
   107  	presult, err := beamx.RunWithMetrics(ctx, p)
   108  	if err != nil {
   109  		log.Fatalf(ctx, "Failed to execute job: %v", err)
   110  	}
   111  
   112  	if presult != nil {
   113  		metrics := presult.Metrics().AllMetrics()
   114  		load.PublishMetrics(metrics)
   115  	}
   116  }