content: /**
   * Licensed 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.aurora.scheduler.events;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  import java.util.Optional;
  
  import com.beust.jcommander.Parameter;
  import com.beust.jcommander.Parameters;
  import com.google.common.annotations.VisibleForTesting;
  import com.google.common.base.Strings;
  import com.google.common.io.Files;
  import com.google.inject.AbstractModule;
  import com.google.inject.Singleton;
  
  import org.apache.aurora.scheduler.SchedulerServicesModule;
  import org.apache.aurora.scheduler.config.validators.ReadableFile;
  import org.asynchttpclient.AsyncHttpClient;
  import org.asynchttpclient.DefaultAsyncHttpClientConfig;
  import org.asynchttpclient.channel.DefaultKeepAliveStrategy;
  import org.codehaus.jackson.map.ObjectMapper;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import static com.google.common.base.Preconditions.checkArgument;
  
  import static org.asynchttpclient.Dsl.asyncHttpClient;
  
  /**
   * Binding module for webhook management.
   */
  public class WebhookModule extends AbstractModule {
  
    private static final Logger LOG = LoggerFactory.getLogger(WebhookModule.class);
  
    @VisibleForTesting
    static final String WEBHOOK_CONFIG_PATH = "org/apache/aurora/scheduler/webhook.json";
  
    @Parameters(separators = "=")
    public static class Options {
      @Parameter(names = "-webhook_config",
          validateValueWith = ReadableFile.class,
          description = "Path to webhook configuration file.")
      public File webhookConfigFile = null;
    }
  
    private final Optional<String> webhookConfig;
  
    public WebhookModule(Options options) {
      this.webhookConfig = Optional.ofNullable(options.webhookConfigFile)
          .map(f -> {
            try {
              return Files.asCharSource(options.webhookConfigFile, StandardCharsets.UTF_8).read();
            } catch (IOException e) {
              throw new RuntimeException(e);
            }
          });
    }
  
    @VisibleForTesting
    WebhookModule(Optional<String> webhookConfig) {
      this.webhookConfig = webhookConfig;
    }
  
    @Override
    protected void configure() {
      if (webhookConfig.isPresent()) {
        WebhookInfo webhookInfo = parseWebhookConfig(webhookConfig.get());
        DefaultAsyncHttpClientConfig config = new DefaultAsyncHttpClientConfig.Builder()
            .setThreadPoolName("WebHook-AsyncHttpClient")
            .setConnectTimeout(webhookInfo.getConnectonTimeoutMsec())
            .setHandshakeTimeout(webhookInfo.getConnectonTimeoutMsec())
            .setSslSessionTimeout(webhookInfo.getConnectonTimeoutMsec())
            .setReadTimeout(webhookInfo.getConnectonTimeoutMsec())
            .setRequestTimeout(webhookInfo.getConnectonTimeoutMsec())
            .setKeepAliveStrategy(new DefaultKeepAliveStrategy())
            .build();
        AsyncHttpClient httpClient = asyncHttpClient(config);
  
        bind(WebhookInfo.class).toInstance(webhookInfo);
        bind(AsyncHttpClient.class).toInstance(httpClient);
        PubsubEventModule.bindSubscriber(binder(), Webhook.class);
        bind(Webhook.class).in(Singleton.class);
  
        SchedulerServicesModule.addSchedulerActiveServiceBinding(binder())
            .to(Webhook.class);
      }
    }
  
    @VisibleForTesting
    static WebhookInfo parseWebhookConfig(String config) {
      checkArgument(!Strings.isNullOrEmpty(config), "Webhook configuration cannot be empty");
      try {
        return new ObjectMapper().readValue(config, WebhookInfo.class);
      } catch (IOException e) {
        LOG.error("Error parsing Webhook configuration file.");
        throw new RuntimeException(e);
      }
    }
  }
  