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 com.alibaba.cloudapp.observabilities.opentelemetry.metric;
  
  import io.opentelemetry.exporter.otlp.http.metrics.OtlpHttpMetricExporter;
  import io.opentelemetry.exporter.prometheus.PrometheusHttpServer;
  import io.opentelemetry.sdk.metrics.export.MetricExporter;
  import io.opentelemetry.sdk.metrics.export.MetricReader;
  import io.opentelemetry.sdk.metrics.export.PeriodicMetricReader;
  
  import java.time.Duration;
  import java.util.function.Predicate;
  
  public class MetricReaderExporterConfig {
      
      static final Predicate<String> ALLOW_ALL = attributeKey -> true;
      
      public static MetricExporter otlpHttpMetricExporter(String endpoint,
                                                          Integer timeout) {
          return OtlpHttpMetricExporter.builder()
                  .setEndpoint(endpoint)
                  .setTimeout(Duration.ofSeconds(timeout))
                  .build();
      }
      
      public static MetricReader periodicMetricReader(String metricEndpoint,
                                                      Integer timeout,
                                                      Integer interval) {
          return PeriodicMetricReader
                  .builder(otlpHttpMetricExporter(metricEndpoint, timeout))
                  .setInterval(Duration.ofSeconds((interval)))
                  .build();
      }
  
      /**
       * Build prometheus http server as metric reader
       * @return MetricReader
       */
      public static MetricReader prometheusMetricReader(String address,
                                                        Integer prometheusPort) {
          return PrometheusHttpServer
                  .builder()
                  .setHost(address)
                  .setPort(prometheusPort)
                  .setOtelScopeEnabled(true)
                  .setAllowedResourceAttributesFilter(ALLOW_ALL)
                  .build();
      }
  }
  