hudson.tasks.LogRotator Maven / Gradle / Ivy

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package hudson.tasks;

import hudson.model.Describable;
import hudson.model.Descriptor;
import hudson.model.Job;
import hudson.model.Run;
import hudson.scm.SCM;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.util.Calendar;
import java.util.GregorianCalendar;

import org.kohsuke.stapler.StaplerRequest;

/**
 * Deletes old log files.
 *
 * TODO: is there any other task that follows the same pattern?
 * try to generalize this just like {@link SCM} or {@link BuildStep}.
 *
 * @author Kohsuke Kawaguchi
 */
public class LogRotator implements Describable {

    /**
     * If not -1, history is only kept up to this days.
     */
    private final int daysToKeep;

    /**
     * If not -1, only this number of build logs are kept.
     */
    private final int numToKeep;

    public LogRotator(int daysToKeep, int numToKeep) {
        this.daysToKeep = daysToKeep;
        this.numToKeep = numToKeep;
    }

    public void perform(Job job) throws IOException {
        // keep the last successful build regardless of the status
        Run lsb = job.getLastSuccessfulBuild();

        if(numToKeep!=-1) {
            Run[] builds = job.getBuilds().toArray(new Run[0]);
            for( int i=numToKeep; i {
        private LRDescriptor() {
            super(LogRotator.class);
        }

        public String getDisplayName() {
            return "Log Rotation";
        }

        public LogRotator newInstance(StaplerRequest req) {
            return new LogRotator(
                    parse(req,"logrotate_days"),
                    parse(req,"logrotate_nums") );
        }

        private int parse(HttpServletRequest req, String name) {
            String p = req.getParameter(name);
            if(p==null)     return -1;
            try {
                return Integer.parseInt(p);
            } catch (NumberFormatException e) {
                return -1;
            }
        }
    }
}