/**
* 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.List;
import java.util.Stack;
import com.atlassian.jira.rest.client.domain.BasicIssue;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.component.jira.JIRAEndpoint;
/**
* Consumes new JIRA issues.
*
* NOTE: We manually add "ORDER BY key desc" to the JQL in order to optimize startup (the latest issues one at a time),
* rather than having to index everything.
*/
public class NewIssueConsumer extends AbstractJIRAConsumer {
private final String jql;
private long latestIssueId = -1;
public NewIssueConsumer(JIRAEndpoint endpoint, Processor processor) {
super(endpoint, processor);
jql = endpoint.getJql() + " ORDER BY key desc";
// grab only the top
List<BasicIssue> issues = getIssues(jql, 0, 1, 1);
// in case there aren't any issues...
if (issues.size() >= 1) {
latestIssueId = issues.get(0).getId();
}
}
@Override
protected int poll() throws Exception {
Stack<BasicIssue> newIssues = new Stack<BasicIssue>();
getNewIssues(0, newIssues);
while (!newIssues.empty()) {
BasicIssue newIssue = newIssues.pop();
Exchange e = getEndpoint().createExchange();
e.getIn().setBody(newIssue);
getProcessor().process(e);
}
return newIssues.size();
}
// In the end, we want *new* issues oldest to newest.
private void getNewIssues(int start, Stack<BasicIssue> stack) {
// grab only the top
List<BasicIssue> issues = getIssues(jql, start, 1, 1);
// in case there aren't any issues...
if (issues.size() >= 1) {
long id = issues.get(0).getId();
if (id > latestIssueId) {
stack.push(issues.get(0));
// try again in case multiple new issues exist
getNewIssues(start + 1, stack);
// make sure this happens now, rather than before calling #getNewIssues
latestIssueId = id;
}
}
}
}