question: private void checkCertificateDateValidity ( X509Certificate certificate ) { final String CERTIFICATE_EXPIRED_MESSAGE = "ViPR's certificate has expired. Please set a new one, or post a regenerate request" ; final String CERTIFICATE_WILL_EXPIRE_MESSAGE_FORMAT = "ViPR's certificate will expire within %d %s. Please make arrangements to set a new certificate or to post a regenerate request" ; Date lastCertificateAlert = null ; try { lastCertificateAlert = coordConfigStoringHelper . readConfig ( coordConfigStoringHelper . getSiteId ( ) , KEY_CERTIFICATE_PAIR_CONFIG_KIND , LAST_CERTIFICATE_ALERT_ID , LAST_CERTIFICATE_ALERT_KEY ) ; } catch ( Exception e ) { log . warn ( e . getMessage ( ) , e ) ; } Date notAfter = DateUtils . truncate ( certificate . getNotAfter ( ) , Calendar . DATE ) ; Date today = DateUtils . truncate ( new Date ( ) , Calendar . DATE ) ; Date nextWeek = DateUtils . addWeeks ( today , 1 ) ; Date nextMonth = DateUtils . addMonths ( today , 1 ) ; Date next3Months = DateUtils . addMonths ( today , 3 ) ; Date next6Months = DateUtils . addMonths ( today , 6 ) ; if ( lastCertificateAlert == null || DateUtils . truncatedCompareTo ( lastCertificateAlert , today , Calendar . DATE ) < 0 ) { boolean logAlert = false ; String messageToLog = CERTIFICATE_WILL_EXPIRE_MESSAGE_FORMAT ; int timeAmount = 0 ; String timeType = null ; LogLevel logLevel = LogLevel . WARN ; if ( notAfter . before ( today ) ) { logLevel = LogLevel . FATAL ; messageToLog = CERTIFICATE_EXPIRED_MESSAGE ; logAlert = true ; } else if ( DateUtils . isSameDay ( notAfter , today ) ) { timeType = "days" ; logLevel = LogLevel . ERROR ; logAlert = true ; } else if ( notAfter . before ( nextWeek ) ) { timeAmount = 1 ; timeType = "week" ; logAlert = true ; } else if ( notAfter . before ( nextMonth ) ) { timeAmount = 1 ; timeType = "month" ; logAlert = true ; } else if ( notAfter . before ( next3Months ) ) { timeAmount = 3 ; timeType = "months" ; logAlert = true ; } else if ( notAfter . before ( next6Months ) ) { timeAmount = 6 ; timeType = "months" ; logAlert = true ; } if ( logAlert ) { logAlert ( messageToLog , timeAmount , timeType , logLevel ) ; try { coordConfigStoringHelper . createOrUpdateConfig ( today , KEY_CERTIFICATE_PAIR_LOCK , coordConfigStoringHelper . getSiteId ( ) , KEY_CERTIFICATE_PAIR_CONFIG_KIND , LAST_CERTIFICATE_ALERT_ID , LAST_CERTIFICATE_ALERT_KEY ) ; } catch ( Exception e ) { log . error ( "Could not set the time of last alert about certificate expiry" , e ) ; } } } }
target:  checks if the certificate is about to expire, and alerts in case it is