content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.instrumentation.cassandra.v4_4;
  
  import com.datastax.oss.driver.api.core.config.DefaultDriverOption;
  import com.datastax.oss.driver.api.core.config.DriverExecutionProfile;
  import com.datastax.oss.driver.api.core.cql.ExecutionInfo;
  import com.datastax.oss.driver.api.core.cql.Statement;
  import com.datastax.oss.driver.api.core.metadata.EndPoint;
  import com.datastax.oss.driver.api.core.metadata.Node;
  import com.datastax.oss.driver.internal.core.metadata.DefaultEndPoint;
  import com.datastax.oss.driver.internal.core.metadata.SniEndPoint;
  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 io.opentelemetry.instrumentation.api.internal.SemconvStability;
  import io.opentelemetry.semconv.ServerAttributes;
  import java.lang.reflect.Field;
  import java.net.InetSocketAddress;
  import java.util.logging.Level;
  import java.util.logging.Logger;
  import javax.annotation.Nullable;
  
  final class CassandraAttributesExtractor
      implements AttributesExtractor<CassandraRequest, ExecutionInfo> {
  
    private static final Logger logger =
        Logger.getLogger(CassandraAttributesExtractor.class.getName());
  
    // copied from DbIncubatingAttributes
    private static final AttributeKey<String> DB_CASSANDRA_CONSISTENCY_LEVEL =
        AttributeKey.stringKey("db.cassandra.consistency_level");
    private static final AttributeKey<String> DB_CASSANDRA_COORDINATOR_DC =
        AttributeKey.stringKey("db.cassandra.coordinator.dc");
    private static final AttributeKey<String> DB_CASSANDRA_COORDINATOR_ID =
        AttributeKey.stringKey("db.cassandra.coordinator.id");
    private static final AttributeKey<Boolean> DB_CASSANDRA_IDEMPOTENCE =
        AttributeKey.booleanKey("db.cassandra.idempotence");
    private static final AttributeKey<Long> DB_CASSANDRA_PAGE_SIZE =
        AttributeKey.longKey("db.cassandra.page_size");
    private static final AttributeKey<Long> DB_CASSANDRA_SPECULATIVE_EXECUTION_COUNT =
        AttributeKey.longKey("db.cassandra.speculative_execution_count");
  
    // copied from CassandraIncubatingAttributes
    private static final AttributeKey<String> CASSANDRA_CONSISTENCY_LEVEL =
        AttributeKey.stringKey("cassandra.consistency.level");
    private static final AttributeKey<String> CASSANDRA_COORDINATOR_DC =
        AttributeKey.stringKey("cassandra.coordinator.dc");
    private static final AttributeKey<String> CASSANDRA_COORDINATOR_ID =
        AttributeKey.stringKey("cassandra.coordinator.id");
    private static final AttributeKey<Long> CASSANDRA_PAGE_SIZE =
        AttributeKey.longKey("cassandra.page.size");
    private static final AttributeKey<Boolean> CASSANDRA_QUERY_IDEMPOTENT =
        AttributeKey.booleanKey("cassandra.query.idempotent");
    private static final AttributeKey<Long> CASSANDRA_SPECULATIVE_EXECUTION_COUNT =
        AttributeKey.longKey("cassandra.speculative_execution.count");
  
    private static final Field proxyAddressField = getProxyAddressField();
  
    @Override
    public void onStart(
        AttributesBuilder attributes, Context parentContext, CassandraRequest request) {}
  
    @Override
    public void onEnd(
        AttributesBuilder attributes,
        Context context,
        CassandraRequest request,
        @Nullable ExecutionInfo executionInfo,
        @Nullable Throwable error) {
      if (executionInfo == null) {
        return;
      }
  
      Node coordinator = executionInfo.getCoordinator();
      if (coordinator != null) {
        updateServerAddressAndPort(attributes, coordinator);
  
        if (coordinator.getDatacenter() != null) {
          if (SemconvStability.emitStableDatabaseSemconv()) {
            attributes.put(CASSANDRA_COORDINATOR_DC, coordinator.getDatacenter());
          }
          if (SemconvStability.emitOldDatabaseSemconv()) {
            attributes.put(DB_CASSANDRA_COORDINATOR_DC, coordinator.getDatacenter());
          }
        }
        if (coordinator.getHostId() != null) {
          if (SemconvStability.emitStableDatabaseSemconv()) {
            attributes.put(CASSANDRA_COORDINATOR_ID, coordinator.getHostId().toString());
          }
          if (SemconvStability.emitOldDatabaseSemconv()) {
            attributes.put(DB_CASSANDRA_COORDINATOR_ID, coordinator.getHostId().toString());
          }
        }
      }
      if (SemconvStability.emitStableDatabaseSemconv()) {
        attributes.put(
            CASSANDRA_SPECULATIVE_EXECUTION_COUNT, executionInfo.getSpeculativeExecutionCount());
      }
      if (SemconvStability.emitOldDatabaseSemconv()) {
        attributes.put(
            DB_CASSANDRA_SPECULATIVE_EXECUTION_COUNT, executionInfo.getSpeculativeExecutionCount());
      }
  
      Statement<?> statement = (Statement<?>) executionInfo.getRequest();
      String consistencyLevel;
      DriverExecutionProfile config =
          request.getSession().getContext().getConfig().getDefaultProfile();
      if (statement.getConsistencyLevel() != null) {
        consistencyLevel = statement.getConsistencyLevel().name();
      } else {
        consistencyLevel = config.getString(DefaultDriverOption.REQUEST_CONSISTENCY);
      }
      if (SemconvStability.emitStableDatabaseSemconv()) {
        attributes.put(CASSANDRA_CONSISTENCY_LEVEL, consistencyLevel);
      }
      if (SemconvStability.emitOldDatabaseSemconv()) {
        attributes.put(DB_CASSANDRA_CONSISTENCY_LEVEL, consistencyLevel);
      }
  
      if (statement.getPageSize() > 0) {
        if (SemconvStability.emitStableDatabaseSemconv()) {
          attributes.put(CASSANDRA_PAGE_SIZE, statement.getPageSize());
        }
        if (SemconvStability.emitOldDatabaseSemconv()) {
          attributes.put(DB_CASSANDRA_PAGE_SIZE, statement.getPageSize());
        }
      } else {
        int pageSize = config.getInt(DefaultDriverOption.REQUEST_PAGE_SIZE);
        if (pageSize > 0) {
          if (SemconvStability.emitStableDatabaseSemconv()) {
            attributes.put(CASSANDRA_PAGE_SIZE, pageSize);
          }
          if (SemconvStability.emitOldDatabaseSemconv()) {
            attributes.put(DB_CASSANDRA_PAGE_SIZE, pageSize);
          }
        }
      }
  
      Boolean idempotent = statement.isIdempotent();
      if (idempotent == null) {
        idempotent = config.getBoolean(DefaultDriverOption.REQUEST_DEFAULT_IDEMPOTENCE);
      }
      if (SemconvStability.emitStableDatabaseSemconv()) {
        attributes.put(CASSANDRA_QUERY_IDEMPOTENT, idempotent);
      }
      if (SemconvStability.emitOldDatabaseSemconv()) {
        attributes.put(DB_CASSANDRA_IDEMPOTENCE, idempotent);
      }
    }
  
    private static void updateServerAddressAndPort(AttributesBuilder attributes, Node coordinator) {
      EndPoint endPoint = coordinator.getEndPoint();
      if (endPoint instanceof DefaultEndPoint) {
        InetSocketAddress address = ((DefaultEndPoint) endPoint).resolve();
        attributes.put(ServerAttributes.SERVER_ADDRESS, address.getHostString());
        attributes.put(ServerAttributes.SERVER_PORT, address.getPort());
      } else if (endPoint instanceof SniEndPoint && proxyAddressField != null) {
        SniEndPoint sniEndPoint = (SniEndPoint) endPoint;
        Object object = null;
        try {
          object = proxyAddressField.get(sniEndPoint);
        } catch (Exception e) {
          logger.log(
              Level.FINE,
              "Error when accessing the private field proxyAddress of SniEndPoint using reflection.",
              e);
        }
        if (object instanceof InetSocketAddress) {
          InetSocketAddress address = (InetSocketAddress) object;
          attributes.put(ServerAttributes.SERVER_ADDRESS, address.getHostString());
          attributes.put(ServerAttributes.SERVER_PORT, address.getPort());
        }
      }
    }
  
    @Nullable
    private static Field getProxyAddressField() {
      try {
        Field field = SniEndPoint.class.getDeclaredField("proxyAddress");
        field.setAccessible(true);
        return field;
      } catch (Exception e) {
        return null;
      }
    }
  }
  