content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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
   *
   *     http://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 org.apache.beam.runners.core.metrics;
  
  import static org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkArgument;
  
  import java.util.Map;
  import java.util.Objects;
  import org.apache.beam.model.pipeline.v1.MetricsApi;
  import org.apache.beam.sdk.metrics.MetricName;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Strings;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /**
   * An implementation of {@code MetricKey} based on a MonitoringInfo's URN and label to represent the
   * key instead of only a name+namespace. This is useful when defining system defined metrics with a
   * specific urn via a {@code CounterContainer}.
   */
  public class MonitoringInfoMetricName extends MetricName {
  
    private final String urn;
    private final Map<String, String> labels;
  
    private MonitoringInfoMetricName(String urn, Map<String, String> labels) {
      checkArgument(!Strings.isNullOrEmpty(urn), "MonitoringInfoMetricName urn must be non-empty");
      checkArgument(labels != null, "MonitoringInfoMetricName labels must be non-null");
      // and ensure all necessary labels are set for the specific URN.
      this.urn = urn;
      this.labels = ImmutableMap.copyOf(labels);
    }
  
    @Override
    public String getNamespace() {
      // User-generated metric
      String ret = labels.get(MonitoringInfoConstants.Labels.NAMESPACE);
      if (ret != null) {
        return ret;
      }
      // System-generated metric
      ret = labels.get(MonitoringInfoConstants.Labels.PCOLLECTION);
      if (ret != null) {
        return ret;
      }
      // System-generated metric
      ret = labels.get(MonitoringInfoConstants.Labels.PTRANSFORM);
      if (ret != null) {
        return ret;
      }
      return urn.split(":", 2)[0];
    }
  
    @Override
    public String getName() {
      String ret = labels.get(MonitoringInfoConstants.Labels.NAME);
      if (ret != null) {
        return ret;
      }
      return urn.split(":", 2)[1];
    }
  
    /** @return the urn of this MonitoringInfo metric. */
    public String getUrn() {
      return this.urn;
    }
  
    /** @return The labels associated with this MonitoringInfo. */
    @Override
    public Map<String, String> getLabels() {
      return this.labels;
    }
  
    public static MonitoringInfoMetricName of(MetricsApi.MonitoringInfo mi) {
      return new MonitoringInfoMetricName(mi.getUrn(), mi.getLabelsMap());
    }
  
    public static MonitoringInfoMetricName named(String urn, Map<String, String> labels) {
      return new MonitoringInfoMetricName(urn, labels);
    }
  
    @Override
    public int hashCode() {
      // Don't include name and namespace, since they are lazily set.
      return Objects.hash(urn, labels);
    }
  
    @Override
    public boolean equals(@Nullable Object o) {
      // If the object is compared with itself then return true
      if (o == this) {
        return true;
      }
      if (!(o instanceof MonitoringInfoMetricName)) {
        return false;
      }
      MonitoringInfoMetricName other = (MonitoringInfoMetricName) o;
      return this.urn.equals(other.urn) && this.labels.equals(other.labels);
    }
  
    @Override
    public final String toString() {
      StringBuilder builder = new StringBuilder();
      builder.append(this.urn.toString());
      builder.append(" ");
      builder.append(this.labels.toString());
      return builder.toString();
    }
  }
  