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/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software GmbH & Co. KG, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.scheduler;
import org.opencms.configuration.CmsParameterConfiguration;
import org.opencms.configuration.I_CmsConfigurationParameterHandler;
import org.opencms.i18n.CmsMessageContainer;
import org.opencms.main.CmsContextInfo;
import org.opencms.main.CmsIllegalArgumentException;
import org.opencms.main.CmsLog;
import org.opencms.main.CmsRuntimeException;
import org.opencms.main.OpenCms;
import org.opencms.util.CmsStringUtil;
import java.util.Collections;
import java.util.Date;
import java.util.SortedMap;
import java.util.TreeMap;
import javax.validation.Valid;
import org.apache.commons.logging.Log;
import org.quartz.CronTrigger;
import org.quartz.Trigger;
/**
* Describes a scheduled job for the OpenCms scheduler.
*
*
* The time the scheduled job is executed is defined with Unix 'cron-like' definitions.
*
*
*
* For those unfamiliar with "cron", this means being able to create a firing
* schedule such as: "At 8:00am every Monday through Friday" or "At 1:30am
* every last Friday of the month".
*
*
*
* A "Cron-Expression" is a string comprised of 6 or 7 fields separated by
* white space. The 6 mandatory and 1 optional fields are as follows:
*
*
*
* Field Name
*
* Allowed Values
*
* Allowed Special Characters
*
*
* Seconds
* 0-59
* , - * /
*
* Minutes
* 0-59
* , - * /
*
* Hours
* 0-23
* , - * /
*
* Day-of-month
* 1-31
* , - * ? / L C
*
* Month
* 1-12 or JAN-DEC
* , - * /
*
* Day-of-Week
* 1-7 or SUN-SAT
* , - * ? / L C #
*
* Year (Optional)
* empty, 1970-2099
* , - * /
*
*
*
*
* The '*' character is used to specify all values. For example, "*" in the
* minute field means "every minute".
*
*
*
* The '?' character is allowed for the day-of-month and day-of-week fields. It
* is used to specify 'no specific value'. This is useful when you need to
* specify something in one of the two fields, but not the other. See the
* examples below for clarification.
*
*
*
* The '-' character is used to specify ranges For example "10-12" in the hour
* field means "the hours 10, 11 and 12".
*
*
*
* The ',' character is used to specify additional values. For example
* "MON,WED,FRI" in the day-of-week field means "the days Monday, Wednesday,
* and Friday".
*
*
*
* The '/' character is used to specify increments. For example "0/15" in the
* seconds field means "the seconds 0, 15, 30, and 45". And "5/15" in the
* seconds field means "the seconds 5, 20, 35, and 50". You can also specify
* '/' after the '*' character - in this case '*' is equivalent to having '0'
* before the '/'.
*
*
*
* The 'L' character is allowed for the day-of-month and day-of-week fields.
* This character is short-hand for "last", but it has different meaning in
* each of the two fields. For example, the value "L" in the day-of-month field
* means "the last day of the month" - day 31 for January, day 28 for February
* on non-leap years. If used in the day-of-week field by itself, it simply
* means "7" or "SAT". But if used in the day-of-week field after another
* value, it means "the last xxx day of the month" - for example "6L" means
* "the last friday of the month". When using the 'L' option, it is important
* not to specify lists, or ranges of values, as you'll get confusing results.
*
*
*
* The 'W' character is allowed for the day-of-month field. This character
* is used to specify the weekday (Monday-Friday) nearest the given day. As an
* example, if you were to specify "15W" as the value for the day-of-month
* field, the meaning is: "the nearest weekday to the 15th of the month". So
* if the 15th is a Saturday, the trigger will fire on Friday the 14th. If the
* 15th is a Sunday, the trigger will fire on Monday the 16th. If the 15th is
* a Tuesday, then it will fire on Tuesday the 15th. However if you specify
* "1W" as the value for day-of-month, and the 1st is a Saturday, the trigger
* will fire on Monday the 3rd, as it will not 'jump' over the boundary of a
* month's days. The 'W' character can only be specified when the day-of-month
* is a single day, not a range or list of days.
*
*
*
* The 'L' and 'W' characters can also be combined for the day-of-month
* expression to yield 'LW', which translates to "last weekday of the month".
*
*
*
* The '#' character is allowed for the day-of-week field. This character is
* used to specify "the nth" XXX day of the month. For example, the value of
* "6#3" in the day-of-week field means the third Friday of the month (day 6 =
* Friday and "#3" = the 3rd one in the month). Other examples: "2#1" = the
* first Monday of the month and "4#5" = the fifth Wednesday of the month. Note
* that if you specify "#5" and there is not 5 of the given day-of-week in the
* month, then no firing will occur that month.
*
*
*
* The 'C' character is allowed for the day-of-month and day-of-week fields.
* This character is short-hand for "calendar". This means values are
* calculated against the associated calendar, if any. If no calendar is
* associated, then it is equivalent to having an all-inclusive calendar. A
* value of "5C" in the day-of-month field means "the first day included by the
* calendar on or after the 5th". A value of "1C" in the day-of-week field
* means "the first day included by the calendar on or after sunday".
*
*
*
* The legal characters and the names of months and days of the week are not
* case sensitive.
*
*
*
* Here are some full examples:
*
* Expression
*
* Meaning
*
*
* "0 0 12 * * ?"
* Fire at 12pm (noon) every day
*
* "0 15 10 ? * *"
* Fire at 10:15am every day
*
* "0 15 10 * * ?"
* Fire at 10:15am every day
*
* "0 15 10 * * ? *"
* Fire at 10:15am every day
*
* "0 15 10 * * ? 2005"
* Fire at 10:15am every day during the year 2005
*
*
* "0 * 14 * * ?"
* Fire every minute starting at 2pm and ending at 2:59pm, every day
*
*
* "0 0/5 14 * * ?"
* Fire every 5 minutes starting at 2pm and ending at 2:55pm, every day
*
*
* "0 0/5 14,18 * * ?"
* Fire every 5 minutes starting at 2pm and ending at 2:55pm, AND fire every 5 minutes starting at 6pm and ending at 6:55pm, every day
*
*
* "0 0-5 14 * * ?"
* Fire every minute starting at 2pm and ending at 2:05pm, every day
*
*
* "0 10,44 14 ? 3 WED"
* Fire at 2:10pm and at 2:44pm every Wednesday in the month of March.
*
*
* "0 15 10 ? * MON-FRI"
* Fire at 10:15am every Monday, Tuesday, Wednesday, Thursday and Friday
*
*
* "0 15 10 15 * ?"
* Fire at 10:15am on the 15th day of every month
*
*
* "0 15 10 L * ?"
* Fire at 10:15am on the last day of every month
*
*
* "0 15 10 ? * 6L"
* Fire at 10:15am on the last Friday of every month
*
*
* "0 15 10 ? * 6L"
* Fire at 10:15am on the last Friday of every month
*
*
* "0 15 10 ? * 6L 2002-2005"
* Fire at 10:15am on every last friday of every month during the years 2002, 2003, 2004 and 2005
*
*
* "0 15 10 ? * 6#3"
* Fire at 10:15am on the third Friday of every month
*
*
*
*
*
* Pay attention to the effects of '?' and '*' in the day-of-week and
* day-of-month fields!
*
*
*
* NOTES:
*
* - Support for the features described for the 'C' character is not
* complete.
* - Support for specifying both a day-of-week and a day-of-month value is
* not complete (you'll need to use the '?' character in on of these fields).
*
* - Be careful when setting fire times between mid-night and 1:00 AM -
* "daylight savings" can cause a skip or a repeat depending on whether the
* time moves back or jumps forward.
*
*
*
*
* @since 6.0.0
*/
public class CmsScheduledJobInfo implements I_CmsConfigurationParameterHandler {
/** The log object for this class. */
private static final Log LOG = CmsLog.getLog(CmsScheduledJobInfo.class);
/** Indicates if this job is currently active in the scheduler or not. */
private boolean m_active;
/** The name of the class to schedule. */
private String m_className;
/** The context information for the user to execute the job with. */
private CmsContextInfo m_context;
/** The cron expression for this scheduler job. */
private String m_cronExpression;
/** Indicates if the configuration of this job is finalized (frozen). */
private boolean m_frozen;
/** The id of this job. */
private String m_id;
/** Instance object of the scheduled job (only required when instance is re-used). */
private I_CmsScheduledJob m_jobInstance;
/** The name of the job (for information purposes). */
private String m_jobName;
/** The parameters used for this job entry. */
private SortedMap m_parameters;
/** Indicates if the job instance should be re-used if the job is run. */
private boolean m_reuseInstance;
/** The (cron) trigger used for scheduling this job. */
private Trigger m_trigger;
/**
* Default constructor.
*/
public CmsScheduledJobInfo() {
m_reuseInstance = false;
m_frozen = false;
// parameters are stored in a tree map
m_parameters = new TreeMap();
// a job is active by default
m_active = true;
}
/**
* Constructor for creating a new job with all required parameters.
*
* @param id the id of the job of null if a new id should be automatically generated
* @param jobName the display name of the job
* @param className the class name of the job, must be an instance of {@link I_CmsScheduledJob}
* @param context the OpenCms user context information to use when executing the job
* @param cronExpression the cron expression for scheduling the job
* @param reuseInstance indicates if the job class should be re-used
* @param active indicates if the job should be active in the scheduler
* @param parameters the job parameters
*/
public CmsScheduledJobInfo(
String id,
String jobName,
String className,
CmsContextInfo context,
String cronExpression,
boolean reuseInstance,
boolean active,
SortedMap parameters) {
m_frozen = false;
setId(id);
if (CmsStringUtil.isNotEmpty(jobName)) {
// job name is optional, if not present class name will be used
setJobName(jobName);
}
setClassName(className);
setContextInfo(context);
setCronExpression(cronExpression);
setReuseInstance(reuseInstance);
setActive(active);
setParameters(parameters);
}
/**
* @see org.opencms.configuration.I_CmsConfigurationParameterHandler#addConfigurationParameter(java.lang.String, java.lang.String)
*/
public void addConfigurationParameter(String paramName, String paramValue) {
checkFrozen();
// add the configured parameter
m_parameters.put(paramName, paramValue);
if (LOG.isDebugEnabled()) {
LOG.debug(
org.opencms.configuration.Messages.get().getBundle().key(
org.opencms.configuration.Messages.LOG_ADD_CONFIG_PARAM_3,
paramName,
paramValue,
this));
}
}
/**
* Clears the id of the job.
*
* This is useful if you want to create a copy of a job without keeping the job id.
* Use {@link CmsScheduledJobInfo#clone()} first to create the copy,
* and then clear the id of the clone.
*/
public void clearId() {
setId(null);
}
/**
* Creates a clone of this scheduled job.
*
* The clone will not be active in the scheduler until it is scheduled
* with {@link CmsScheduleManager#scheduleJob(org.opencms.file.CmsObject, CmsScheduledJobInfo)}.
* The job id returned by {@link #getId()} will be the same.
* The {@link #isActive()} flag will be set to false.
* The clones job instance class will be the same
* if the {@link #isReuseInstance()} flag is set.
*
* @see java.lang.Object#clone()
*/
@Override
public Object clone() {
CmsScheduledJobInfo result = new CmsScheduledJobInfo();
result.m_id = m_id;
result.m_active = false;
result.m_frozen = false;
result.m_className = m_className;
if (isReuseInstance()) {
result.m_jobInstance = m_jobInstance;
}
result.m_reuseInstance = m_reuseInstance;
result.m_context = (CmsContextInfo)m_context.clone();
result.m_cronExpression = m_cronExpression;
result.m_jobName = m_jobName;
result.m_parameters = new TreeMap(m_parameters);
result.m_trigger = null;
return result;
}
/**
* Returns the name of the class to schedule.
*
* @return the name of the class to schedule
*/
public String getClassName() {
return m_className;
}
/**
* @see org.opencms.configuration.I_CmsConfigurationParameterHandler#getConfiguration()
*/
public CmsParameterConfiguration getConfiguration() {
// this configuration does not support parameters
if (LOG.isDebugEnabled()) {
LOG.debug(
org.opencms.configuration.Messages.get().getBundle().key(
org.opencms.configuration.Messages.LOG_GET_CONFIGURATION_1,
this));
}
return new CmsParameterConfiguration(getParameters());
}
/**
* Returns the context information for the user executing this job.
*
* Please note: The context time returned by {@link org.opencms.file.CmsRequestContext#getRequestTime()}
* will be set to the time when this job was created.
* This can be relevant in case you want to perform VFS operations, because it will
* affect how resources are processed that have date released / date expired attributes set.
*
* @return the context information for the user executing this job
*/
@Valid
public CmsContextInfo getContextInfo() {
return m_context;
}
/**
* Returns the cron expression for this job entry.
*
* @return the cron expression for this job entry
*/
public String getCronExpression() {
return m_cronExpression;
}
/**
* Returns the next time at which this job will be executed, after the given time.
*
* If this job will not be executed after the given time, null will be returned..
*
* @param date the after which the next execution time should be calculated
* @return the next time at which this job will be executed, after the given time
*/
public Date getExecutionTimeAfter(Date date) {
if (!m_active || (m_trigger == null)) {
// if the job is not active, no time can be calculated
return null;
}
return m_trigger.getFireTimeAfter(date);
}
/**
* Returns the next time at which this job will be executed.
*
* If the job will not execute again, null will be returned.
*
* @return the next time at which this job will be executed
*/
public Date getExecutionTimeNext() {
if (!m_active || (m_trigger == null)) {
// if the job is not active, no time can be calculated
return null;
}
return m_trigger.getNextFireTime();
}
/**
* Returns the previous time at which this job will be executed.
*
* If this job has not yet been executed, null will be returned.
*
* @return the previous time at which this job will be executed
*/
public Date getExecutionTimePrevious() {
if (!m_active || (m_trigger == null)) {
// if the job is not active, no time can be calculated
return null;
}
return m_trigger.getPreviousFireTime();
}
/**
* Returns the internal id of this job in the scheduler.
*
* Can be used to remove this job from the scheduler with
* {@link CmsScheduleManager#unscheduleJob(org.opencms.file.CmsObject, String)}.
*
* @return the internal id of this job in the scheduler
*/
public String getId() {
return m_id;
}
/**
* Returns an instance of the configured job class.
*
* If any error occurs during class invocaion, the error
* is written to the OpenCms log and null is returned.
*
* @return an instance of the configured job class, or null if an error occurred
*/
public synchronized I_CmsScheduledJob getJobInstance() {
if (m_jobInstance != null) {
if (LOG.isDebugEnabled()) {
LOG.debug(
Messages.get().getBundle().key(
Messages.LOG_REUSING_INSTANCE_1,
m_jobInstance.getClass().getName()));
}
// job instance already initialized
return m_jobInstance;
}
I_CmsScheduledJob job = null;
try {
// create an instance of the OpenCms job class
job = (I_CmsScheduledJob)Class.forName(getClassName()).newInstance();
} catch (ClassNotFoundException e) {
LOG.error(Messages.get().getBundle().key(Messages.LOG_CLASS_NOT_FOUND_1, getClassName()), e);
} catch (IllegalAccessException e) {
LOG.error(Messages.get().getBundle().key(Messages.LOG_ILLEGAL_ACCESS_0), e);
} catch (InstantiationException e) {
LOG.error(Messages.get().getBundle().key(Messages.LOG_INSTANCE_GENERATION_0), e);
} catch (ClassCastException e) {
LOG.error(Messages.get().getBundle().key(Messages.LOG_BAD_INTERFACE_0), e);
}
if (m_reuseInstance) {
// job instance must be re-used
m_jobInstance = job;
}
if (LOG.isDebugEnabled()) {
LOG.debug(Messages.get().getBundle().key(Messages.LOG_JOB_CREATED_1, getClassName()));
}
// this should not flood the log files: if class name is wrong or jar files missing this will
// most likely persist until restart.
if (job == null) {
setActive(false);
}
return job;
}
/**
* Returns the job name.
*
* @return the job name
*/
public String getJobName() {
return m_jobName;
}
/**
* Returns the parameters.
*
* @return the parameters
*/
public SortedMap getParameters() {
return m_parameters;
}
/**
* Finalizes (freezes) the configuration of this scheduler job entry.
*
* After this job entry has been frozen, any attempt to change the
* configuration of this entry with one of the "set..." methods
* will lead to a RuntimeException.
*
* @see org.opencms.configuration.I_CmsConfigurationParameterHandler#initConfiguration()
*/
public void initConfiguration() {
// simple default configuration does not need to be initialized
if (LOG.isDebugEnabled()) {
LOG.debug(
org.opencms.configuration.Messages.get().getBundle().key(
org.opencms.configuration.Messages.LOG_INIT_CONFIGURATION_1,
this));
}
setFrozen(true);
}
/**
* Returns true if this job is currently active in the scheduler.
*
* @return true if this job is currently active in the scheduler
*/
public boolean isActive() {
return m_active;
}
/**
* Returns true if the job instance class is reused for this job.
*
* @return true if the job instance class is reused for this job
*/
public boolean isReuseInstance() {
return m_reuseInstance;
}
/**
* Sets the active state of this job.
*
* @param active the active state to set
*/
public void setActive(boolean active) {
checkFrozen();
m_active = active;
}
/**
* Sets the name of the class to schedule.
*
* @param className the class name to set
*/
public void setClassName(String className) {
checkFrozen();
if (className != null) {
// remove leading or trailing white space
className = className.trim();
}
if (!CmsStringUtil.isValidJavaClassName(className)) {
CmsMessageContainer message = Messages.get().container(Messages.ERR_BAD_JOB_CLASS_NAME_1, className);
if (OpenCms.getRunLevel() > OpenCms.RUNLEVEL_2_INITIALIZING) {
throw new CmsIllegalArgumentException(message);
} else {
LOG.warn(message.key());
}
} else {
Class jobClass;
try {
jobClass = Class.forName(className);
if (!I_CmsScheduledJob.class.isAssignableFrom(jobClass)) {
CmsMessageContainer message = Messages.get().container(
Messages.ERR_JOB_CLASS_BAD_INTERFACE_2,
className,
I_CmsScheduledJob.class.getName());
if (OpenCms.getRunLevel() > OpenCms.RUNLEVEL_2_INITIALIZING) {
throw new CmsIllegalArgumentException(message);
} else {
LOG.warn(message.key());
}
}
} catch (ClassNotFoundException e) {
CmsMessageContainer message = Messages.get().container(Messages.ERR_JOB_CLASS_NOT_FOUND_1, className);
if (OpenCms.getRunLevel() > OpenCms.RUNLEVEL_2_INITIALIZING) {
throw new CmsIllegalArgumentException(message);
} else {
LOG.warn(message.key());
}
}
}
m_className = className;
if (getJobName() == null) {
// initialize job name with class name as default
setJobName(className);
}
}
/**
* Sets the context information for the user executing the job.
*
* This will also "freeze" the context information that is set.
*
* @param contextInfo the context information for the user executing the job
*
* @see CmsContextInfo#freeze()
*/
public void setContextInfo(CmsContextInfo contextInfo) {
checkFrozen();
if (contextInfo == null) {
throw new CmsIllegalArgumentException(Messages.get().container(Messages.ERR_BAD_CONTEXT_INFO_0));
}
m_context = contextInfo;
}
/**
* Sets the cron expression for this job entry.
*
* @param cronExpression the cron expression to set
*/
public void setCronExpression(String cronExpression) {
checkFrozen();
try {
// check if the cron expression is valid
new CronTrigger().setCronExpression(cronExpression);
} catch (Exception e) {
throw new CmsIllegalArgumentException(
Messages.get().container(Messages.ERR_BAD_CRON_EXPRESSION_2, getJobName(), cronExpression));
}
m_cronExpression = cronExpression;
}
/**
* Sets the job name.
*
* @param jobName the job name to set
*/
public void setJobName(String jobName) {
checkFrozen();
if (CmsStringUtil.isEmpty(jobName) || !jobName.trim().equals(jobName)) {
throw new CmsIllegalArgumentException(Messages.get().container(Messages.ERR_BAD_JOB_NAME_1, jobName));
}
m_jobName = jobName;
}
/**
* Sets the job parameters.
*
* @param parameters the parameters to set
*/
public void setParameters(SortedMap parameters) {
checkFrozen();
if (parameters == null) {
throw new CmsIllegalArgumentException(Messages.get().container(Messages.ERR_BAD_JOB_PARAMS_0));
}
// make sure the parameters are a sorted map
m_parameters = new TreeMap(parameters);
}
/**
* Controls if the job instance class is reused for this job,
* of if a new instance is generated every time the job is run.
*
* @param reuseInstance must be true if the job instance class is to be reused
*/
public void setReuseInstance(boolean reuseInstance) {
checkFrozen();
m_reuseInstance = reuseInstance;
}
/**
* Checks if this job info configuration is frozen.
*
* @throws CmsRuntimeException in case the configuration is already frozen
*/
protected void checkFrozen() throws CmsRuntimeException {
if (m_frozen) {
throw new CmsRuntimeException(Messages.get().container(Messages.ERR_JOB_INFO_FROZEN_1, getJobName()));
}
}
/**
* Returns the Quartz trigger used for scheduling this job.
*
* This is an internal operation that should only by performed by the
* {@link CmsScheduleManager}, never by using this API directly.
*
* @return the Quartz trigger used for scheduling this job
*/
protected Trigger getTrigger() {
return m_trigger;
}
/**
* Sets the "frozen" state of this job.
*
* This is an internal operation to be used only by the {@link CmsScheduleManager}.
*
* @param frozen the "frozen" state to set
*/
protected synchronized void setFrozen(boolean frozen) {
if (frozen && !m_frozen) {
// "freeze" the job configuration
m_parameters = Collections.unmodifiableSortedMap(m_parameters);
m_context.freeze();
m_frozen = true;
} else if (!frozen && m_frozen) {
// "unfreeze" the job configuration
m_parameters = new TreeMap(m_parameters);
m_frozen = false;
}
}
/**
* Sets the is used for scheduling this job.
*
* This is an internal operation that should only by performed by the
* {@link CmsScheduleManager}, never by using this API directly.
*
* @param id the id to set
*/
protected void setId(String id) {
checkFrozen();
m_id = id;
}
/**
* Sets the Quartz trigger used for scheduling this job.
*
* This is an internal operation that should only by performed by the
* {@link CmsScheduleManager}, never by using this API directly.
*
* @param trigger the Quartz trigger to set
*/
protected void setTrigger(Trigger trigger) {
checkFrozen();
m_trigger = trigger;
}
/**
* Updates the request time in the internal context information of the user with the current system time.
*
* This is required before executing the job, otherwise the context information request time would be the time
* the context object was initially created.
*/
protected void updateContextRequestTime() {
CmsContextInfo context = (CmsContextInfo)m_context.clone();
context.setRequestTime(System.currentTimeMillis());
context.freeze();
m_context = context;
}
}