rollingcalendar.java

一个免费的CA,基于EJB平台的,老师叫我们测试,现把之共享出来让大家参考

package org.ejbca.appserver.jboss;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;

/**
 *  RollingCalendar is a helper class to DailyRollingFileAppender.
 *  Given a periodicity type and the current time, it computes the
 *  start of the next interval.  
 * */
public class RollingCalendar extends GregorianCalendar {

    // The code assumes that the following constants are in a increasing
    // sequence.
    static public final int TOP_OF_TROUBLE=-1;
    static public final int TOP_OF_MINUTE = 0;
    static public final int TOP_OF_HOUR   = 1;
    static public final int HALF_DAY      = 2;
    static public final int TOP_OF_DAY    = 3;
    static public final int TOP_OF_WEEK   = 4;
    static public final int TOP_OF_MONTH  = 5;


    int type = ScriptrunningDailyRollingFileAppender.TOP_OF_TROUBLE;

    RollingCalendar() {
        super();
    }  

    RollingCalendar(TimeZone tz, Locale locale) {
        super(tz, locale);
    }  

    void setType(int type) {
        this.type = type;
    }

    public long getNextCheckMillis(Date now) {
        return getNextCheckDate(now).getTime();
    }

    public Date getNextCheckDate(Date now) {
        this.setTime(now);

        switch(type) {
        case ScriptrunningDailyRollingFileAppender.TOP_OF_MINUTE:
            this.set(Calendar.SECOND, 0);
            this.set(Calendar.MILLISECOND, 0);
            this.add(Calendar.MINUTE, 1);
            break;
        case ScriptrunningDailyRollingFileAppender.TOP_OF_HOUR:
            this.set(Calendar.MINUTE, 0);
            this.set(Calendar.SECOND, 0);
            this.set(Calendar.MILLISECOND, 0);
            this.add(Calendar.HOUR_OF_DAY, 1);
            break;
        case ScriptrunningDailyRollingFileAppender.HALF_DAY:
            this.set(Calendar.MINUTE, 0);
            this.set(Calendar.SECOND, 0);
            this.set(Calendar.MILLISECOND, 0);
            int hour = get(Calendar.HOUR_OF_DAY);
            if(hour < 12) {
                this.set(Calendar.HOUR_OF_DAY, 12);
            } else {
                this.set(Calendar.HOUR_OF_DAY, 0);
                this.add(Calendar.DAY_OF_MONTH, 1);
            }
            break;
        case ScriptrunningDailyRollingFileAppender.TOP_OF_DAY:
            this.set(Calendar.HOUR_OF_DAY, 0);
            this.set(Calendar.MINUTE, 0);
            this.set(Calendar.SECOND, 0);
            this.set(Calendar.MILLISECOND, 0);
            this.add(Calendar.DATE, 1);
            break;
        case ScriptrunningDailyRollingFileAppender.TOP_OF_WEEK:
            this.set(Calendar.DAY_OF_WEEK, getFirstDayOfWeek());
            this.set(Calendar.HOUR_OF_DAY, 0);
            this.set(Calendar.SECOND, 0);
            this.set(Calendar.MILLISECOND, 0);
            this.add(Calendar.WEEK_OF_YEAR, 1);
            break;
        case ScriptrunningDailyRollingFileAppender.TOP_OF_MONTH:
            this.set(Calendar.DATE, 1);
            this.set(Calendar.HOUR_OF_DAY, 0);
            this.set(Calendar.SECOND, 0);
            this.set(Calendar.MILLISECOND, 0);
            this.add(Calendar.MONTH, 1);
            break;
        default:
            throw new IllegalStateException("Unknown periodicity type.");
        }
        return getTime();
    }
}