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.connect.runtime;
  
  import org.apache.kafka.common.metrics.PluginMetrics;
  import org.apache.kafka.common.metrics.internals.PluginMetricsImpl;
  import org.apache.kafka.common.utils.Utils;
  import org.apache.kafka.connect.errors.ConnectException;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * ConnectorContext for use with a Herder
   */
  public class HerderConnectorContext implements CloseableConnectorContext {
  
      private static final Logger log = LoggerFactory.getLogger(HerderConnectorContext.class);
  
      private final AbstractHerder herder;
      private final String connectorName;
      private final PluginMetricsImpl pluginMetrics;
      private volatile boolean closed;
  
      public HerderConnectorContext(AbstractHerder herder, String connectorName, PluginMetricsImpl pluginMetrics) {
          this.herder = herder;
          this.connectorName = connectorName;
          this.pluginMetrics = pluginMetrics;
          this.closed = false;
      }
  
      @Override
      public void requestTaskReconfiguration() {
          if (closed) {
              throw new ConnectException("The request for task reconfiguration has been rejected " 
                      + "because this instance of the connector '" + connectorName + "' has already " 
                      + "been shut down.");
          }
  
          // Local herder runs in memory in this process
          // Distributed herder will forward the request to the leader if needed
          herder.requestTaskReconfiguration(connectorName);
      }
  
      @Override
      public void raiseError(Exception e) {
          if (closed) {
              log.warn("Connector {} attempted to raise error after shutdown:", connectorName, e);
              throw new ConnectException("The request to fail the connector has been rejected " 
                      + "because this instance of the connector '" + connectorName + "' has already " 
                      + "been shut down.");
          }
  
          herder.onFailure(connectorName, e);
      }
  
      @Override
      public PluginMetrics pluginMetrics() {
          return pluginMetrics;
      }
  
      @Override
      public void close() {
          Utils.closeQuietly(pluginMetrics, "Plugin metrics for " + connectorName);
          closed = true;
      }
  }
  