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| <div class="subTitle">jakarta.enterprise.concurrent</div> |
| <h2 title="Interface ZonedTrigger" class="title">Interface ZonedTrigger</h2> |
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| <div class="description"> |
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| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><a href="../../../jakarta/enterprise/concurrent/Trigger.html" title="interface in jakarta.enterprise.concurrent">Trigger</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../jakarta/enterprise/concurrent/CronTrigger.html" title="class in jakarta.enterprise.concurrent">CronTrigger</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public interface <span class="typeNameLabel">ZonedTrigger</span> |
| extends <a href="../../../jakarta/enterprise/concurrent/Trigger.html" title="interface in jakarta.enterprise.concurrent">Trigger</a></pre> |
| <div class="block">Triggers allow application developers to plug in rules for when |
| and how often a task should run. The trigger can be as simple as |
| a single, absolute date-time or can include Jakarta™ EE business |
| calendar logic. A trigger implementation is created by the |
| application developer (or may be supplied to the application |
| externally) and is registered with a task when it is submitted |
| to a <a href="../../../jakarta/enterprise/concurrent/ManagedScheduledExecutorService.html" title="interface in jakarta.enterprise.concurrent"><code>ManagedScheduledExecutorService</code></a> using any of the |
| schedule methods. Each method will run with unspecified context. |
| The methods can be made contextual through creating contextual |
| proxy objects using <a href="../../../jakarta/enterprise/concurrent/ContextService.html" title="interface in jakarta.enterprise.concurrent"><code>ContextService</code></a>. |
| <p> |
| Each trigger instance will be invoked within the same process |
| in which it was registered. |
| <p> |
| |
| Example: |
| <pre> |
| /** |
| * A trigger that runs on the hour, Mon-Fri from 8am-8pm Central US time. |
| */ |
| public class HourlyDuringBusinessHoursTrigger implements ZonedTrigger { |
| static final ZoneId ZONE = ZoneId.of("America/Chicago"); |
| |
| public ZoneId getZoneId() { |
| return ZONE; |
| } |
| |
| public ZonedDateTime getNextRunTime(LastExecution lastExec, ZonedDateTime taskScheduledTime) { |
| ZonedDateTime prevTime = lastExec == null ? taskScheduledTime : lastExec.getRunEnd(ZONE); |
| ZonedDateTime nextTime = prevTime.truncatedTo(ChronoUnit.HOURS).plusHours(1); |
| DayOfWeek day = nextTime.getDayOfWeek(); |
| if (day.equals(DayOfWeek.SATURDAY) || day.equals(DayOfWeek.SUNDAY)) { |
| nextTime = nextTime.truncatedTo(ChronoUnit.DAYS).plusDays(1).withHour(8); |
| } else { // Mon-Fri 8am-8pm |
| int hour = nextTime.getHour(); |
| if (hour < 8) |
| nextTime = nextTime.plusHours(8 - hour); |
| else if (hour > 20) |
| nextTime = nextTime.truncatedTo(ChronoUnit.DAYS) |
| .plusDays(day.equals(DayOfWeek.FRIDAY) ? 3 : 1) |
| .withHour(8); |
| } |
| return nextTime; |
| } |
| } |
| </pre> |
| <P></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>3.0</dd> |
| </dl> |
| </li> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span><span id="t5" class="tableTab"><span><a href="javascript:show(16);">Default Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>default java.util.Date</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../jakarta/enterprise/concurrent/ZonedTrigger.html#getNextRunTime-jakarta.enterprise.concurrent.LastExecution-java.util.Date-">getNextRunTime</a></span>(<a href="../../../jakarta/enterprise/concurrent/LastExecution.html" title="interface in jakarta.enterprise.concurrent">LastExecution</a> lastExecutionInfo, |
| java.util.Date taskScheduledTime)</code> |
| <div class="block">Retrieve the next time that the task should run after.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>java.time.ZonedDateTime</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../jakarta/enterprise/concurrent/ZonedTrigger.html#getNextRunTime-jakarta.enterprise.concurrent.LastExecution-java.time.ZonedDateTime-">getNextRunTime</a></span>(<a href="../../../jakarta/enterprise/concurrent/LastExecution.html" title="interface in jakarta.enterprise.concurrent">LastExecution</a> lastExecutionInfo, |
| java.time.ZonedDateTime taskScheduledTime)</code> |
| <div class="block">Retrieve the next time that the task should run after.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>default java.time.ZoneId</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../jakarta/enterprise/concurrent/ZonedTrigger.html#getZoneId--">getZoneId</a></span>()</code> |
| <div class="block">Returns the timezone to use for the |
| <code>ZonedDateTime</code> that is supplied to the |
| <a href="../../../jakarta/enterprise/concurrent/ZonedTrigger.html#getNextRunTime-jakarta.enterprise.concurrent.LastExecution-java.time.ZonedDateTime-"><code>getNextRunTime</code></a> and |
| <a href="../../../jakarta/enterprise/concurrent/ZonedTrigger.html#skipRun-jakarta.enterprise.concurrent.LastExecution-java.time.ZonedDateTime-"><code>skipRun</code></a> methods.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>default boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../jakarta/enterprise/concurrent/ZonedTrigger.html#skipRun-jakarta.enterprise.concurrent.LastExecution-java.util.Date-">skipRun</a></span>(<a href="../../../jakarta/enterprise/concurrent/LastExecution.html" title="interface in jakarta.enterprise.concurrent">LastExecution</a> lastExecutionInfo, |
| java.util.Date scheduledRunTime)</code> |
| <div class="block">Return true if this run instance should be skipped.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>default boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../jakarta/enterprise/concurrent/ZonedTrigger.html#skipRun-jakarta.enterprise.concurrent.LastExecution-java.time.ZonedDateTime-">skipRun</a></span>(<a href="../../../jakarta/enterprise/concurrent/LastExecution.html" title="interface in jakarta.enterprise.concurrent">LastExecution</a> lastExecutionInfo, |
| java.time.ZonedDateTime scheduledRunTime)</code> |
| <div class="block">Return true if this run instance should be skipped.</div> |
| </td> |
| </tr> |
| </table> |
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| <h3>Method Detail</h3> |
| <a name="getNextRunTime-jakarta.enterprise.concurrent.LastExecution-java.time.ZonedDateTime-"> |
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| <h4>getNextRunTime</h4> |
| <pre>java.time.ZonedDateTime getNextRunTime(<a href="../../../jakarta/enterprise/concurrent/LastExecution.html" title="interface in jakarta.enterprise.concurrent">LastExecution</a> lastExecutionInfo, |
| java.time.ZonedDateTime taskScheduledTime)</pre> |
| <div class="block">Retrieve the next time that the task should run after.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>lastExecutionInfo</code> - information about the last execution of the task. |
| This value will be null if the task has not yet run.</dd> |
| <dd><code>taskScheduledTime</code> - the date/time at which the |
| <code>ManagedScheduledExecutorService.schedule</code> |
| method was invoked to schedule the task.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the date/time after which the next execution of the task should start.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getNextRunTime-jakarta.enterprise.concurrent.LastExecution-java.util.Date-"> |
| <!-- --> |
| </a> |
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| <h4>getNextRunTime</h4> |
| <pre>default java.util.Date getNextRunTime(<a href="../../../jakarta/enterprise/concurrent/LastExecution.html" title="interface in jakarta.enterprise.concurrent">LastExecution</a> lastExecutionInfo, |
| java.util.Date taskScheduledTime)</pre> |
| <div class="block">Retrieve the next time that the task should run after. |
| <P> |
| This method is provided to maintain compatibility with <a href="../../../jakarta/enterprise/concurrent/Trigger.html" title="interface in jakarta.enterprise.concurrent"><code>Trigger</code></a> and should not be |
| implemented. The default implementation delegates to the method signature that |
| accepts and returns <code>ZonedDateTime</code>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../jakarta/enterprise/concurrent/Trigger.html#getNextRunTime-jakarta.enterprise.concurrent.LastExecution-java.util.Date-">getNextRunTime</a></code> in interface <code><a href="../../../jakarta/enterprise/concurrent/Trigger.html" title="interface in jakarta.enterprise.concurrent">Trigger</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>lastExecutionInfo</code> - information about the last execution of the task. |
| This value will be null if the task has not yet run.</dd> |
| <dd><code>taskScheduledTime</code> - the date/time at which the |
| <code>ManagedScheduledExecutorService.schedule</code> |
| method was invoked to schedule the task.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the date/time after which the next execution of the task should start.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.lang.IllegalArgumentException</code> - if the next run time is too large to represent as a <code>Date</code>.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getZoneId--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getZoneId</h4> |
| <pre>default java.time.ZoneId getZoneId()</pre> |
| <div class="block">Returns the timezone to use for the |
| <code>ZonedDateTime</code> that is supplied to the |
| <a href="../../../jakarta/enterprise/concurrent/ZonedTrigger.html#getNextRunTime-jakarta.enterprise.concurrent.LastExecution-java.time.ZonedDateTime-"><code>getNextRunTime</code></a> and |
| <a href="../../../jakarta/enterprise/concurrent/ZonedTrigger.html#skipRun-jakarta.enterprise.concurrent.LastExecution-java.time.ZonedDateTime-"><code>skipRun</code></a> methods. |
| <P> |
| The default implementation returns the system default timezone |
| and should be overridden whenever there is chance that the server |
| might not be running with the same timezone for which the |
| business logic within this trigger is written.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>timezone to use for operations on this trigger.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="skipRun-jakarta.enterprise.concurrent.LastExecution-java.time.ZonedDateTime-"> |
| <!-- --> |
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| <h4>skipRun</h4> |
| <pre>default boolean skipRun(<a href="../../../jakarta/enterprise/concurrent/LastExecution.html" title="interface in jakarta.enterprise.concurrent">LastExecution</a> lastExecutionInfo, |
| java.time.ZonedDateTime scheduledRunTime)</pre> |
| <div class="block">Return true if this run instance should be skipped. |
| <p> |
| This is useful if the task shouldn't run because it is late or if the task |
| is paused or suspended. |
| <p> |
| Once this task is skipped, the state of its Future's result will throw a |
| <a href="../../../jakarta/enterprise/concurrent/SkippedException.html" title="class in jakarta.enterprise.concurrent"><code>SkippedException</code></a>. Unchecked exceptions will be wrapped in a |
| <code>SkippedException</code>. |
| <p> |
| The default implementation returns <code>false</code>, making it optional to |
| implement this method if you do not require support for skipped executions.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>lastExecutionInfo</code> - information about the last execution of the task. |
| This value will be null if the task has not yet run.</dd> |
| <dd><code>scheduledRunTime</code> - the date/time after which the execution of the task |
| is scheduled to start.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the task should be skipped and rescheduled.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="skipRun-jakarta.enterprise.concurrent.LastExecution-java.util.Date-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
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| <h4>skipRun</h4> |
| <pre>default boolean skipRun(<a href="../../../jakarta/enterprise/concurrent/LastExecution.html" title="interface in jakarta.enterprise.concurrent">LastExecution</a> lastExecutionInfo, |
| java.util.Date scheduledRunTime)</pre> |
| <div class="block">Return true if this run instance should be skipped. |
| <P> |
| This method is provided to maintain compatibility with <a href="../../../jakarta/enterprise/concurrent/Trigger.html" title="interface in jakarta.enterprise.concurrent"><code>Trigger</code></a> and should not be |
| implemented. The default implementation delegates to the method signature that |
| accepts <code>ZonedDateTime</code>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../jakarta/enterprise/concurrent/Trigger.html#skipRun-jakarta.enterprise.concurrent.LastExecution-java.util.Date-">skipRun</a></code> in interface <code><a href="../../../jakarta/enterprise/concurrent/Trigger.html" title="interface in jakarta.enterprise.concurrent">Trigger</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>lastExecutionInfo</code> - information about the last execution of the task. |
| This value will be null if the task has not yet run.</dd> |
| <dd><code>scheduledRunTime</code> - the date/time after which the execution of the task |
| is scheduled to start.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the task should be skipped and rescheduled.</dd> |
| </dl> |
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