hudson.util.ClockDifference Maven / Gradle / Ivy

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package hudson.util;

import hudson.Util;
import hudson.model.Node;
import hudson.model.Hudson;

import java.io.IOException;

import org.kohsuke.stapler.Stapler;
import org.kohsuke.stapler.export.ExportedBean;
import org.kohsuke.stapler.export.Exported;

/**
 * Represents a clock difference. Immutable.
 *
 * @author Kohsuke Kawaguchi
 */
@ExportedBean
public final class ClockDifference {
    /**
     * The difference in milliseconds.
     *
     * Positive value means the slave is behind the master,
     * negative value means the slave is ahead of the master.
     */
    @Exported
    public final long diff;

    public ClockDifference(long value) {
        this.diff = value;
    }

    /**
     * Returns true if the difference is big enough to be considered dangerous.
     */
    public boolean isDangerous() {
        return Math.abs(diff)>5000;
    }

    /**
     * Gets the absolute value of {@link #diff}.
     */
    public long abs() {
        return Math.abs(diff);
    }

    /**
     * Gets the clock difference in HTML string.
     */
    public String toString() {
        if(-1000