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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.log4j.scheduler</a></div>
<h2 title="Class Scheduler" class="title">Class Scheduler</h2>
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<pre>public class <span class="typeNameLabel">Scheduler</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true" title="class or interface in java.lang" class="externalLink">Thread</a></pre>
<div class="block">A simple but still useful implementation of a Scheduler (in memory only).
<p></p>
This implementation will work very well when the number of scheduled job is
small, say less than 100 jobs. If a larger number of events need to be
scheduled, than a better adapted data structure for the jobList can give
improved performance.</div>
<dl>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Ceki</dd>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.State.html?is-external=true" title="class or interface in java.lang" class="externalLink">Thread.State</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.UncaughtExceptionHandler.html?is-external=true" title="class or interface in java.lang" class="externalLink">Thread.UncaughtExceptionHandler</a></code></li>
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<th class="colFirst" scope="col">Constructor</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">Scheduler</a></span>()</code></th>
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<div class="block">Create new instance.</div>
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<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#changePeriod(org.apache.log4j.scheduler.Job,long)">changePeriod</a></span>&#8203;(<a href="Job.html" title="interface in org.apache.log4j.scheduler">Job</a>&nbsp;job,
long&nbsp;newPeriod)</code></th>
<td class="colLast">
<div class="block">Change the period of a job.</div>
</td>
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<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#delete(org.apache.log4j.scheduler.Job)">delete</a></span>&#8203;(<a href="Job.html" title="interface in org.apache.log4j.scheduler">Job</a>&nbsp;job)</code></th>
<td class="colLast">
<div class="block">Delete the given job.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#run()">run</a></span>()</code></th>
<td class="colLast">
<div class="block">Run scheduler.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#schedule(org.apache.log4j.scheduler.Job,long)">schedule</a></span>&#8203;(<a href="Job.html" title="interface in org.apache.log4j.scheduler">Job</a>&nbsp;job,
long&nbsp;desiredTime)</code></th>
<td class="colLast">
<div class="block">Schedule a <a href="Job.html" title="interface in org.apache.log4j.scheduler"><code>Job</code></a> for execution at system time given by
the <code>desiredTime</code> parameter.</div>
</td>
</tr>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#schedule(org.apache.log4j.scheduler.Job,long,long)">schedule</a></span>&#8203;(<a href="Job.html" title="interface in org.apache.log4j.scheduler">Job</a>&nbsp;job,
long&nbsp;desiredTime,
long&nbsp;period)</code></th>
<td class="colLast">
<div class="block">Schedule a <a href="Job.html" title="interface in org.apache.log4j.scheduler"><code>Job</code></a> for execution at system time given by
the <code>desiredTime</code> parameter.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#shutdown()">shutdown</a></span>()</code></th>
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<div class="block">Shut down scheduler.</div>
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class="externalLink">getDefaultUncaughtExceptionHandler</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#getId()" title="class or interface in java.lang" class="externalLink">getId</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#getName()" title="class or interface in java.lang" class="externalLink">getName</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#getPriority()" title="class or interface in java.lang" class="externalLink">getPriority</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#getStackTrace()" title="class or interface in java.lang" class="externalLink">getStackTrace</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#getState()" title="class or interface in java.lang" class="externalLink">getState</a>, <a 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interface in java.lang" class="externalLink">join</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#onSpinWait()" title="class or interface in java.lang" class="externalLink">onSpinWait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#resume()" title="class or interface in java.lang" class="externalLink">resume</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#setContextClassLoader(java.lang.ClassLoader)" title="class or interface in java.lang" class="externalLink">setContextClassLoader</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#setDaemon(boolean)" title="class or interface in java.lang" class="externalLink">setDaemon</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#setDefaultUncaughtExceptionHandler(java.lang.Thread.UncaughtExceptionHandler)" title="class 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<h4>Scheduler</h4>
<pre>public&nbsp;Scheduler()</pre>
<div class="block">Create new instance.</div>
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<h4>delete</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;delete&#8203;(<a href="Job.html" title="interface in org.apache.log4j.scheduler">Job</a>&nbsp;job)</pre>
<div class="block">Delete the given job.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>job</code> - job.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the job could be deleted, and
false if the job could not be found or if the Scheduler is about to
shutdown in which case deletions are not permitted.</dd>
</dl>
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<h4>schedule</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;schedule&#8203;(<a href="Job.html" title="interface in org.apache.log4j.scheduler">Job</a>&nbsp;job,
long&nbsp;desiredTime)</pre>
<div class="block">Schedule a <a href="Job.html" title="interface in org.apache.log4j.scheduler"><code>Job</code></a> for execution at system time given by
the <code>desiredTime</code> parameter.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>job</code> - job to schedule.</dd>
<dd><code>desiredTime</code> - desired time of execution.</dd>
</dl>
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<h4>schedule</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;schedule&#8203;(<a href="Job.html" title="interface in org.apache.log4j.scheduler">Job</a>&nbsp;job,
long&nbsp;desiredTime,
long&nbsp;period)</pre>
<div class="block">Schedule a <a href="Job.html" title="interface in org.apache.log4j.scheduler"><code>Job</code></a> for execution at system time given by
the <code>desiredTime</code> parameter.
<p></p>
The job will be rescheduled. It will execute with a frequency determined
by the period parameter.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>job</code> - job to schedule.</dd>
<dd><code>desiredTime</code> - desired time of execution.</dd>
<dd><code>period</code> - repeat period.</dd>
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<h4>changePeriod</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;changePeriod&#8203;(<a href="Job.html" title="interface in org.apache.log4j.scheduler">Job</a>&nbsp;job,
long&nbsp;newPeriod)</pre>
<div class="block">Change the period of a job. The original job must exist for its period
to be changed.
<p></p>
The method returns true if the period could be changed, and false
otherwise.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>job</code> - job.</dd>
<dd><code>newPeriod</code> - new repeat period.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if period could be changed.</dd>
</dl>
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<h4>shutdown</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;shutdown()</pre>
<div class="block">Shut down scheduler.</div>
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<h4>run</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;run()</pre>
<div class="block">Run scheduler.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true#run()" title="class or interface in java.lang" class="externalLink">run</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Runnable</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#run()" title="class or interface in java.lang" class="externalLink">run</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true" title="class or interface in java.lang" class="externalLink">Thread</a></code></dd>
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