[processor/interval] Update config structure for interval processor (o…

…pen-telemetry#34926)

**Description:** This PR addresses comments made in open-telemetry#34805 after it was
merged

The gist is change in configuration from

```yaml
interval: 60s
gauge_pass_through: false
summary_pass_through: false
```

to 

```yaml
interval: 60s
pass_through:
  gauge: false
  summary: false
```

**Link to tracking Issue:** open-telemetry#34920

Signed-off-by: Arthur Silva Sens <arthursens2005@gmail.com>

processor/intervalprocessor/README.md

@@ -33,9 +33,17 @@ The following metric types will *not* be aggregated, and will instead be passed,
 
 The following settings can be optionally configured:
 
-* `interval`: The interval in which the processor should export the aggregated metrics. Default: 60s
-* `gauge_pass_through`: Whether gauges should pass through as they are to the next component or be aggregated. Default: false
-* `summary_pass_through`: Whether summaries should pass through as they are to the next component or be aggregated. Default: false
+```yaml
+intervalprocessor:
+  # The interval in which the processor should export the aggregated metrics. 
+  [ interval: <duration> | default = 60s ]
+
+  pass_through:
+    # Whether gauges should be aggregated or passed through to the next component as they are
+    [ gauge: <bool> | default = false ]
+    # Whether summaries should be aggregated or passed through to the next component as they are
+    [ summary: <boo>l | default = false ]
+```
 
 ## Example of metric flows
 

processor/intervalprocessor/config.go

@@ -20,12 +20,18 @@ var _ component.Config = (*Config)(nil)
 type Config struct {
 	// Interval is the time interval at which the processor will aggregate metrics.
 	Interval time.Duration `mapstructure:"interval"`
-	// GaugePassThrough is a flag that determines whether gauge metrics should be passed through
+	// PassThrough is a configuration that determines whether gauge and summary metrics should be passed through
 	// as they are or aggregated.
-	GaugePassThrough bool `mapstructure:"gauge_pass_through"`
-	// SummaryPassThrough is a flag that determines whether summary metrics should be passed through
+	PassThrough PassThrough `mapstructure:"pass_through"`
+}
+
+type PassThrough struct {
+	// Gauge is a flag that determines whether gauge metrics should be passed through
+	// as they are or aggregated.
+	Gauge bool `mapstructure:"gauge"`
+	// Summary is a flag that determines whether summary metrics should be passed through
 	// as they are or aggregated.
-	SummaryPassThrough bool `mapstructure:"summary_pass_through"`
+	Summary bool `mapstructure:"summary"`
 }
 
 // Validate checks whether the input configuration has all of the required fields for the processor.

processor/intervalprocessor/factory.go

@@ -25,9 +25,11 @@ func NewFactory() processor.Factory {
 
 func createDefaultConfig() component.Config {
 	return &Config{
-		Interval:           60 * time.Second,
-		GaugePassThrough:   false,
-		SummaryPassThrough: false,
+		Interval: 60 * time.Second,
+		PassThrough: PassThrough{
+			Gauge:   false,
+			Summary: false,
+		},
 	}
 }
 

processor/intervalprocessor/processor.go

@@ -38,9 +38,7 @@ type Processor struct {
 	expHistogramLookup map[identity.Stream]pmetric.ExponentialHistogramDataPoint
 	summaryLookup      map[identity.Stream]pmetric.SummaryDataPoint
 
-	exportInterval     time.Duration
-	gaugePassThrough   bool
-	summaryPassThrough bool
+	config *Config
 
 	nextConsumer consumer.Metrics
 }
@@ -64,16 +62,14 @@ func newProcessor(config *Config, log *zap.Logger, nextConsumer consumer.Metrics
 		expHistogramLookup: map[identity.Stream]pmetric.ExponentialHistogramDataPoint{},
 		summaryLookup:      map[identity.Stream]pmetric.SummaryDataPoint{},
 
-		exportInterval:     config.Interval,
-		gaugePassThrough:   config.GaugePassThrough,
-		summaryPassThrough: config.SummaryPassThrough,
+		config: config,
 
 		nextConsumer: nextConsumer,
 	}
 }
 
 func (p *Processor) Start(_ context.Context, _ component.Host) error {
-	exportTicker := time.NewTicker(p.exportInterval)
+	exportTicker := time.NewTicker(p.config.Interval)
 	go func() {
 		for {
 			select {
@@ -109,15 +105,15 @@ func (p *Processor) ConsumeMetrics(ctx context.Context, md pmetric.Metrics) erro
 			sm.Metrics().RemoveIf(func(m pmetric.Metric) bool {
 				switch m.Type() {
 				case pmetric.MetricTypeSummary:
-					if p.summaryPassThrough {
+					if p.config.PassThrough.Summary {
 						return false
 					}
 
 					mClone, metricID := p.getOrCloneMetric(rm, sm, m)
 					aggregateDataPoints(m.Summary().DataPoints(), mClone.Summary().DataPoints(), metricID, p.summaryLookup)
 					return true
 				case pmetric.MetricTypeGauge:
-					if p.gaugePassThrough {
+					if p.config.PassThrough.Gauge {
 						return false
 					}
 

processor/intervalprocessor/processor_test.go

@@ -41,7 +41,7 @@ func TestAggregation(t *testing.T) {
 
 	var config *Config
 	for _, tc := range testCases {
-		config = &Config{Interval: time.Second, GaugePassThrough: tc.passThrough, SummaryPassThrough: tc.passThrough}
+		config = &Config{Interval: time.Second, PassThrough: PassThrough{Gauge: tc.passThrough, Summary: tc.passThrough}}
 
 		t.Run(tc.name, func(t *testing.T) {
 			// next stores the results of the filter metric processor