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.kafka.common.telemetry.internals;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.function.Predicate;
  
  public class ClientTelemetryEmitter implements MetricsEmitter {
  
      private final Predicate<? super MetricKeyable> selector;
      private final List<SinglePointMetric> emitted;
      private final boolean deltaMetrics;
  
      ClientTelemetryEmitter(Predicate<? super MetricKeyable> selector, boolean deltaMetrics) {
          this.selector = selector;
          this.emitted = new ArrayList<>();
          this.deltaMetrics = deltaMetrics;
      }
  
      @Override
      public boolean shouldEmitMetric(MetricKeyable metricKeyable) {
          return selector.test(metricKeyable);
      }
  
      @Override
      public boolean shouldEmitDeltaMetrics() {
          return deltaMetrics;
      }
  
      @Override
      public boolean emitMetric(SinglePointMetric metric) {
          if (!shouldEmitMetric(metric)) {
              return false;
          }
  
          emitted.add(metric);
          return true;
      }
  
      @Override
      public List<SinglePointMetric> emittedMetrics() {
          return Collections.unmodifiableList(emitted);
      }
  }
  