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Merge pull request #3036 from alonbl/exit-on-restart

 [JENKINS-47043] Introduce exit lifecycle to exit instead of restart
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oleg-nenashev committed Jan 13, 2018
2 parents 3a99c2c + 52ff066 commit 51817306f74e4f5966a1a056e8c607528aa97435
Showing with 75 additions and 0 deletions.
  1. +75 −0 core/src/main/java/hudson/lifecycle/ExitLifecycle.java
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/*
* The MIT License
*
* Copyright 2018 Alon Bar-Lev <alon.barlev@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.lifecycle;

import hudson.Extension;

import org.kohsuke.accmod.Restricted;
import org.kohsuke.accmod.restrictions.NoExternalUse;

import java.util.logging.Level;
import java.util.logging.Logger;

import jenkins.model.Configuration;
import jenkins.model.Jenkins;

/**
* {@link Lifecycle} that delegates the responsibility to restart Jenkins to an external
* watchdog such as SystemD or OpenRC.
*
* <p>
* Restart by exit with specific code.
*
* @author Alon Bar-Lev
*/
@Restricted(NoExternalUse.class)
@Extension
public class ExitLifecycle extends Lifecycle {

private static final Logger LOGGER = Logger.getLogger(ExitLifecycle.class.getName());

private static final String EXIT_CODE_ON_RESTART = "exitCodeOnRestart";
private static final String DEFAULT_EXIT_CODE = "5";

private Integer exitOnRestart;

public ExitLifecycle() {
exitOnRestart = Integer.parseInt(Configuration.getStringConfigParameter(EXIT_CODE_ON_RESTART, DEFAULT_EXIT_CODE));
}

@Override
public void restart() {
Jenkins jenkins = Jenkins.getInstanceOrNull(); // guard against repeated concurrent calls to restart

try {
if (jenkins != null) {
jenkins.cleanUp();
}
} catch (Exception e) {
LOGGER.log(Level.SEVERE, "Failed to clean up. Restart will continue.", e);
}

System.exit(exitOnRestart);
}
}

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