code: /*
   * 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.skywalking.oap.server.receiver.otel;
  
  import org.apache.skywalking.oap.server.library.module.ModuleDefine;
  import org.apache.skywalking.oap.server.library.module.ModuleProvider;
  import org.apache.skywalking.oap.server.library.module.ModuleStartException;
  import org.apache.skywalking.oap.server.library.module.ServiceNotProvidedException;
  import org.apache.skywalking.oap.server.receiver.otel.otlp.OpenTelemetryLogHandler;
  import org.apache.skywalking.oap.server.receiver.otel.otlp.OpenTelemetryMetricHandler;
  import org.apache.skywalking.oap.server.receiver.otel.otlp.OpenTelemetryMetricRequestProcessor;
  import org.apache.skywalking.oap.server.receiver.sharing.server.SharingServerModule;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class OtelMetricReceiverProvider extends ModuleProvider {
      public static final String NAME = "default";
  
      private List<Handler> handlers;
  
      private OtelMetricReceiverConfig config;
  
      private OpenTelemetryMetricRequestProcessor metricRequestProcessor;
  
      @Override
      public String name() {
          return NAME;
      }
  
      @Override
      public Class<? extends ModuleDefine> module() {
          return OtelMetricReceiverModule.class;
      }
  
      @Override
      public ConfigCreator<OtelMetricReceiverConfig> newConfigCreator() {
          return new ConfigCreator<OtelMetricReceiverConfig>() {
              @Override
              public Class<OtelMetricReceiverConfig> type() {
                  return OtelMetricReceiverConfig.class;
              }
  
              @Override
              public void onInitialized(final OtelMetricReceiverConfig initialized) {
                  config = initialized;
              }
          };
      }
  
      @Override
      public void prepare() throws ServiceNotProvidedException, ModuleStartException {
          metricRequestProcessor = new OpenTelemetryMetricRequestProcessor(
              getManager(), config);
          registerServiceImplementation(OpenTelemetryMetricRequestProcessor.class, metricRequestProcessor);
          final List<String> enabledHandlers = config.getEnabledHandlers();
          List<Handler> handlers = new ArrayList<>();
  
          final var openTelemetryMetricHandler = new OpenTelemetryMetricHandler(getManager(), metricRequestProcessor);
          if (enabledHandlers.contains(openTelemetryMetricHandler.type())) {
              handlers.add(openTelemetryMetricHandler);
          }
          final var openTelemetryLogHandler = new OpenTelemetryLogHandler(getManager());
          if (enabledHandlers.contains(openTelemetryLogHandler.type())) {
              handlers.add(openTelemetryLogHandler);
          }
          this.handlers = handlers;
      }
  
      @Override
      public void start() throws ServiceNotProvidedException, ModuleStartException {
          metricRequestProcessor.start();
          for (Handler h : handlers) {
              h.active();
          }
      }
  
      @Override
      public void notifyAfterCompleted() throws ServiceNotProvidedException, ModuleStartException {
      }
  
      @Override
      public String[] requiredModules() {
          return new String[] {SharingServerModule.NAME};
      }
  }
  