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.camel.component.jira.consumer;
  
  import java.util.Collections;
  import java.util.LinkedList;
  import java.util.Queue;
  import java.util.stream.Collectors;
  import java.util.stream.StreamSupport;
  
  import com.atlassian.jira.rest.client.api.IssueRestClient;
  import com.atlassian.jira.rest.client.api.domain.Comment;
  import org.apache.camel.Processor;
  import org.apache.camel.component.jira.JiraEndpoint;
  import org.apache.camel.util.CastUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Consumes new comments on JIRA issues.
   *
   * NOTE: In your JQL, try to optimize the query as much as possible! For example, the JIRA Toolkit Plugin includes a //
   * "Number of comments" custom field -- use '"Number of comments" > 0' in your query. Also try to minimize based on //
   * state (status=Open), increase the polling delay, etc. We have to do a separate query for *every single* resulting
   * ticket in order to load its comments! For large organizations, the JIRA API can be significantly slow.
   */
  public class NewCommentsConsumer extends AbstractJiraConsumer {
  
      private static final Logger LOG = LoggerFactory.getLogger(NewCommentsConsumer.class);
  
      private Long lastCommentId = -1L;
  
      public NewCommentsConsumer(JiraEndpoint endpoint, Processor processor) {
          super(endpoint, processor);
      }
  
      @Override
      protected int doPoll() throws Exception {
          Queue<Comment> newComments = getComments();
          processBatch(CastUtils.cast(newComments));
          return newComments.size();
      }
  
      @Override
      protected void doStart() throws Exception {
          super.doStart();
          // read the actual comments, the next poll outputs only the new comments added after the route start
          getComments();
      }
  
      // In the end, we want *new* comments oldest to newest.
      @SuppressWarnings("ConstantConditions")
      private Queue<Comment> getComments() {
          LOG.debug("Start: Jira NewCommentsConsumer: retrieving issue comments. Last comment id: {}", lastCommentId);
          IssueRestClient client = getEndpoint().getClient().getIssueClient();
  
          LinkedList<Comment> newComments = getIssues().stream()
                  .map(issue -> client.getIssue(issue.getKey()).claim())
                  .flatMap(issue -> StreamSupport.stream(issue.getComments().spliterator(), false))
                  .filter(comment -> comment.getId() > lastCommentId)
                  .collect(Collectors.toCollection(LinkedList::new));
  
          Collections.reverse(newComments);
  
          lastCommentId = newComments.stream().mapToLong(Comment::getId).max().orElse(lastCommentId);
          LOG.debug("End: Jira NewCommentsConsumer: retrieving issue comments. {} new comments since last run.",
                  newComments.size());
          return newComments;
      }
  }
  