chore(metrics): move each aggregator in its own file

packages/opentelemetry-metrics/src/export/Batcher.ts

@@ -18,7 +18,7 @@ import {
   CounterSumAggregator,
   MeasureExactAggregator,
   ObserverAggregator,
-} from './Aggregator';
+} from './aggregators';
 import { MetricRecord, MetricKind, Aggregator } from './types';
 
 /**

packages/opentelemetry-metrics/src/export/aggregators/countersum.ts

@@ -0,0 +1,37 @@
+/*!
+ * Copyright 2020, OpenTelemetry Authors
+ *
+ * Licensed 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
+ *
+ *      https://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.
+ */
+
+import { Aggregator, Point } from '../types';
+import { HrTime } from '@opentelemetry/api';
+import { hrTime } from '@opentelemetry/core';
+
+/** Basic aggregator which calculates a Sum from individual measurements. */
+export class CounterSumAggregator implements Aggregator {
+  private _current: number = 0;
+  private _lastUpdateTime: HrTime = [0, 0];
+
+  update(value: number): void {
+    this._current += value;
+    this._lastUpdateTime = hrTime();
+  }
+
+  toPoint(): Point {
+    return {
+      value: this._current,
+      timestamp: this._lastUpdateTime,
+    };
+  }
+}

packages/opentelemetry-metrics/src/export/aggregators/index.ts

@@ -0,0 +1,19 @@
+/*!
+ * Copyright 2020, OpenTelemetry Authors
+ *
+ * Licensed 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
+ *
+ *      https://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.
+ */
+
+export * from './countersum';
+export * from './observer';
+export * from './measureexact';

packages/opentelemetry-metrics/src/export/Aggregator.ts → packages/opentelemetry-metrics/src/export/aggregators/measureexact.ts

@@ -14,46 +14,10 @@
  * limitations under the License.
  */
 
-import { Aggregator, Distribution, Point } from './types';
+import { Aggregator, Point, Distribution } from '../types';
 import { HrTime } from '@opentelemetry/api';
 import { hrTime } from '@opentelemetry/core';
 
-/** Basic aggregator which calculates a Sum from individual measurements. */
-export class CounterSumAggregator implements Aggregator {
-  private _current: number = 0;
-  private _lastUpdateTime: HrTime = [0, 0];
-
-  update(value: number): void {
-    this._current += value;
-    this._lastUpdateTime = hrTime();
-  }
-
-  toPoint(): Point {
-    return {
-      value: this._current,
-      timestamp: this._lastUpdateTime,
-    };
-  }
-}
-
-/** Basic aggregator for Observer which keeps the last recorded value. */
-export class ObserverAggregator implements Aggregator {
-  private _current: number = 0;
-  private _lastUpdateTime: HrTime = [0, 0];
-
-  update(value: number): void {
-    this._current = value;
-    this._lastUpdateTime = hrTime();
-  }
-
-  toPoint(): Point {
-    return {
-      value: this._current,
-      timestamp: this._lastUpdateTime,
-    };
-  }
-}
-
 /** Basic aggregator keeping all raw values (events, sum, max and min). */
 export class MeasureExactAggregator implements Aggregator {
   private _distribution: Distribution;
@@ -82,4 +46,4 @@ export class MeasureExactAggregator implements Aggregator {
       timestamp: this._lastUpdateTime,
     };
   }
-}
+}

packages/opentelemetry-metrics/src/export/aggregators/observer.ts

@@ -0,0 +1,37 @@
+/*!
+ * Copyright 2020, OpenTelemetry Authors
+ *
+ * Licensed 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
+ *
+ *      https://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.
+ */
+
+import { Aggregator, Point } from '../types';
+import { HrTime } from '@opentelemetry/api';
+import { hrTime } from '@opentelemetry/core';
+
+/** Basic aggregator for Observer which keeps the last recorded value. */
+export class ObserverAggregator implements Aggregator {
+  private _current: number = 0;
+  private _lastUpdateTime: HrTime = [0, 0];
+
+  update(value: number): void {
+    this._current = value;
+    this._lastUpdateTime = hrTime();
+  }
+
+  toPoint(): Point {
+    return {
+      value: this._current,
+      timestamp: this._lastUpdateTime,
+    };
+  }
+}

packages/opentelemetry-metrics/src/index.ts

@@ -18,7 +18,6 @@ export * from './BoundInstrument';
 export * from './Meter';
 export * from './Metric';
 export * from './MeterProvider';
-export * from './export/Aggregator';
+export * from './export/aggregators';
 export * from './export/ConsoleMetricExporter';
 export * from './export/types';
-export * from './export/Aggregator';

packages/opentelemetry-metrics/test/Meter.test.ts

@@ -32,7 +32,7 @@ import { NoopLogger, hrTime, hrTimeToNanoseconds } from '@opentelemetry/core';
 import {
   CounterSumAggregator,
   ObserverAggregator,
-} from '../src/export/Aggregator';
+} from '../src/export/aggregators';
 import { ValueType } from '@opentelemetry/api';
 import { Resource } from '@opentelemetry/resources';
 import { hashLabels } from '../src/Utils';