/
StatsWrapper.java
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/
StatsWrapper.java
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/*
* Copyright 2022 Google LLC
*
* 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.
*/
package com.google.cloud.bigtable.stats;
import static com.google.api.gax.tracing.ApiTracerFactory.OperationType;
import com.google.api.core.InternalApi;
import com.google.api.gax.tracing.SpanName;
import io.opencensus.stats.Stats;
import io.opencensus.stats.View;
import io.opencensus.tags.TagKey;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
/**
* Wrapper class for accessing opencensus. We use a shaded version of opencensus to avoid polluting
* the global opencensus namespace. And this provides a facade that will not be relocated.
*/
@InternalApi("For internal use only")
public class StatsWrapper {
public static StatsRecorderWrapper createRecorder(
OperationType operationType, SpanName spanName, Map<String, String> statsAttributes) {
return new StatsRecorderWrapper(
operationType, spanName, statsAttributes, Stats.getStatsRecorder());
}
public static StatsRecorderWrapperForConnection createRecorderForConnection(
Map<String, String> statsAttributes) {
return new StatsRecorderWrapperForConnection(statsAttributes, Stats.getStatsRecorder());
}
// This is used in integration tests to get the tag value strings from view manager because Stats
// is relocated to com.google.bigtable.veneer.repackaged.io.opencensus.
@InternalApi("Visible for testing")
public static List<String> getOperationLatencyViewTagValueStrings() {
return Stats.getViewManager().getView(BuiltinViewConstants.OPERATION_LATENCIES_VIEW.getName())
.getAggregationMap().entrySet().stream()
.map(Map.Entry::getKey)
.flatMap(x -> x.stream())
.map(x -> x.asString())
.collect(Collectors.toCollection(ArrayList::new));
}
// A workaround to run ITBuiltinViewConstantsTest as integration test. Integration test runs after
// the packaging step. Opencensus classes will be relocated when they are packaged but the
// integration test files will not be. So the integration tests can't reference any transitive
// dependencies that have been relocated.
static Map<String, List<String>> getBigtableViewToTagMap() {
Map<String, List<String>> map = new HashMap<>();
for (View view : BuiltinViews.BIGTABLE_BUILTIN_VIEWS) {
List<TagKey> tagKeys = view.getColumns();
map.put(
view.getName().asString(),
tagKeys.stream().map(tagKey -> tagKey.getName()).collect(Collectors.toList()));
}
return map;
}
}