content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.instrumentation.graphql.v20_0;
  
  import graphql.schema.DataFetchingEnvironment;
  import io.opentelemetry.api.common.AttributeKey;
  import io.opentelemetry.api.common.AttributesBuilder;
  import io.opentelemetry.context.Context;
  import io.opentelemetry.instrumentation.api.instrumenter.AttributesExtractor;
  import javax.annotation.Nullable;
  
  final class GraphqlDataFetcherAttributesExtractor
      implements AttributesExtractor<DataFetchingEnvironment, Void> {
  
    // NOTE: These are not part of the Semantic Convention and are subject to change
    private static final AttributeKey<String> GRAPHQL_FIELD_NAME =
        AttributeKey.stringKey("graphql.field.name");
    private static final AttributeKey<String> GRAPHQL_FIELD_PATH =
        AttributeKey.stringKey("graphql.field.path");
  
    @Override
    public void onStart(
        AttributesBuilder attributes, Context parentContext, DataFetchingEnvironment environment) {
      attributes
          .put(GRAPHQL_FIELD_NAME, environment.getExecutionStepInfo().getField().getName())
          .put(GRAPHQL_FIELD_PATH, environment.getExecutionStepInfo().getPath().toString());
    }
  
    @Override
    public void onEnd(
        AttributesBuilder attributes,
        Context context,
        DataFetchingEnvironment environment,
        @Nullable Void unused,
        @Nullable Throwable error) {}
  }
  