/*
* Copyright 2012 LinkedIn Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package azkaban.trigger.builtin;
import java.util.HashMap;
import java.util.Map;
import java.util.Date;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.ReadablePeriod;
import org.apache.log4j.Logger;
import org.quartz.CronExpression;
import azkaban.trigger.ConditionChecker;
import azkaban.utils.Utils;
public class BasicTimeChecker implements ConditionChecker {
public static final String type = "BasicTimeChecker";
private long firstCheckTime;
private long nextCheckTime;
private DateTimeZone timezone;
private boolean isRecurring = true;
private boolean skipPastChecks = true;
private ReadablePeriod period;
private String cronExpression;
private CronExpression cronExecutionTime;
private final String id;
public BasicTimeChecker(String id, long firstCheckTime,
DateTimeZone timezone, boolean isRecurring, boolean skipPastChecks,
ReadablePeriod period, String cronExpression) {
this.id = id;
this.firstCheckTime = firstCheckTime;
this.timezone = timezone;
this.isRecurring = isRecurring;
this.skipPastChecks = skipPastChecks;
this.period = period;
this.nextCheckTime = firstCheckTime;
this.cronExpression = cronExpression;
cronExecutionTime = Utils.parseCronExpression(cronExpression, timezone);
this.nextCheckTime = calculateNextCheckTime();
}
public long getFirstCheckTime() {
return firstCheckTime;
}
public DateTimeZone getTimeZone() {
return timezone;
}
public boolean isRecurring() {
return isRecurring;
}
public boolean isSkipPastChecks() {
return skipPastChecks;
}
public ReadablePeriod getPeriod() {
return period;
}
@Override
public long getNextCheckTime() {
return nextCheckTime;
}
public String getCronExpression() {
return cronExpression;
}
public BasicTimeChecker(String id, long firstCheckTime,
DateTimeZone timezone, long nextCheckTime, boolean isRecurring,
boolean skipPastChecks, ReadablePeriod period, String cronExpression) {
this.id = id;
this.firstCheckTime = firstCheckTime;
this.timezone = timezone;
this.nextCheckTime = nextCheckTime;
this.isRecurring = isRecurring;
this.skipPastChecks = skipPastChecks;
this.period = period;
this.cronExpression = cronExpression;
cronExecutionTime = Utils.parseCronExpression(cronExpression, timezone);
}
@Override
public Boolean eval() {
return nextCheckTime < System.currentTimeMillis();
}
@Override
public void reset() {
this.nextCheckTime = calculateNextCheckTime();
}
@Override
public String getId() {
return id;
}
@Override
public String getType() {
return type;
}
@SuppressWarnings("unchecked")
public static BasicTimeChecker createFromJson(Object obj) throws Exception {
return createFromJson((HashMap<String, Object>) obj);
}
public static BasicTimeChecker createFromJson(HashMap<String, Object> obj)
throws Exception {
Map<String, Object> jsonObj = (HashMap<String, Object>) obj;
if (!jsonObj.get("type").equals(type)) {
throw new Exception("Cannot create checker of " + type + " from "
+ jsonObj.get("type"));
}
Long firstCheckTime = Long.valueOf((String) jsonObj.get("firstCheckTime"));
String timezoneId = (String) jsonObj.get("timezone");
long nextCheckTime = Long.valueOf((String) jsonObj.get("nextCheckTime"));
DateTimeZone timezone = DateTimeZone.forID(timezoneId);
boolean isRecurring = Boolean.valueOf((String) jsonObj.get("isRecurring"));
boolean skipPastChecks =
Boolean.valueOf((String) jsonObj.get("skipPastChecks"));
ReadablePeriod period =
Utils.parsePeriodString((String) jsonObj.get("period"));
String id = (String) jsonObj.get("id");
String cronExpression = (String) jsonObj.get("cronExpression");
BasicTimeChecker checker =
new BasicTimeChecker(id, firstCheckTime, timezone, nextCheckTime,
isRecurring, skipPastChecks, period, cronExpression);
if (skipPastChecks) {
checker.updateNextCheckTime();
}
return checker;
}
@Override
public BasicTimeChecker fromJson(Object obj) throws Exception {
return createFromJson(obj);
}
private void updateNextCheckTime() {
nextCheckTime = calculateNextCheckTime();
}
private long calculateNextCheckTime() {
DateTime date = new DateTime(nextCheckTime).withZone(timezone);
int count = 0;
while (!date.isAfterNow()) {
if (count > 100000) {
throw new IllegalStateException(
"100000 increments of period did not get to present time.");
}
if (period == null && cronExpression == null) {
break;
} else if (cronExecutionTime != null) {
Date nextDate = cronExecutionTime.getNextValidTimeAfter(date.toDate());
date = new DateTime(nextDate);
} else {
date = date.plus(period);
}
count += 1;
if (!skipPastChecks) {
continue;
}
}
return date.getMillis();
}
@Override
public Object getNum() {
return null;
}
@Override
public Object toJson() {
Map<String, Object> jsonObj = new HashMap<String, Object>();
jsonObj.put("type", type);
jsonObj.put("firstCheckTime", String.valueOf(firstCheckTime));
jsonObj.put("timezone", timezone.getID());
jsonObj.put("nextCheckTime", String.valueOf(nextCheckTime));
jsonObj.put("isRecurring", String.valueOf(isRecurring));
jsonObj.put("skipPastChecks", String.valueOf(skipPastChecks));
jsonObj.put("period", Utils.createPeriodString(period));
jsonObj.put("id", id);
jsonObj.put("cronExpression", cronExpression);
return jsonObj;
}
@Override
public void stopChecker() {
return;
}
@Override
public void setContext(Map<String, Object> context) {
}
}