content: package act.metric;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  import act.Act;
  import act.app.App;
  import act.plugin.AppServicePlugin;
  import org.osgl.$;
  import org.osgl.logging.LogManager;
  import org.osgl.logging.Logger;
  import org.osgl.util.S;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * A simple implementation of {@link MetricPlugin}
   */
  public class SimpleMetricPlugin implements MetricPlugin {
  
      private Map<String, Logger> enabledMap = new HashMap<>();
      private SimpleMetricStore defaultMetricStore = new SimpleMetricStore(this);
      private Metric defaultMetric = new SimpleMetric("act", defaultMetricStore);
  
      public SimpleMetricPlugin() {
      }
  
      @Override
      public Metric metric(String name) {
          if (!Act.appConfig().metricEnabled()) {
              return Metric.NULL_METRIC;
          }
          Logger logger = enabledMap.get(name);
          if (null == logger) {
              logger = LogManager.get("act.metric." + name);
              enabledMap.put(name, logger);
          }
          return logger.isTraceEnabled() ? S.blank(name) ? defaultMetric : new SimpleMetric(name, defaultMetricStore) : Metric.NULL_METRIC;
      }
  
      @Override
      public Metric metric() {
          return defaultMetric;
      }
  
      @Override
      public MetricStore metricStore() {
          return defaultMetricStore;
      }
  
      @Override
      public void enableDataSync(boolean sync) {
          defaultMetricStore.enableDataSync(sync);
      }
  
      Logger logger(String name) {
          return enabledMap.get(name);
      }
  
      public static class SimpleMetricPersistService extends AppServicePlugin {
          @Override
          protected void applyTo(App app) {
              if (!app.config().metricEnabled()) {
                  return;
              }
              MetricPlugin plugin = Act.metricPlugin();
              if (plugin instanceof SimpleMetricPlugin) {
                  SimpleMetricPlugin smp = (SimpleMetricPlugin) plugin;
                  final SimpleMetricStore store = $.cast(smp.defaultMetricStore);
                  final Runnable takeSnapshot = new Runnable() {
                      @Override
                      public void run() {
                          store.takeSnapshot();
                      }
                  };
                  app.jobManager().every("metric:snapshot", takeSnapshot, "1mn");
              }
          }
      }
  }
  