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| <div class="subTitle">org.apache.ignite</div> |
| <h2 title="Interface IgniteCountDownLatch" class="title">Interface IgniteCountDownLatch</h2> |
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| <div class="description"> |
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| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></dd> |
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| <br> |
| <pre>public interface <span class="typeNameLabel">IgniteCountDownLatch</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></pre> |
| <div class="block">This interface provides a rich API for working with distributed count down latch. |
| <p> |
| <h1 class="header">Functionality</h1> |
| Distributed count down latch provides functionality similar to <code>java.util.CountDownLatch</code>. |
| Note that you cannot remove count down latch having count greater that zero. It should be |
| counted down to zero first. |
| <h1 class="header">Creating Distributed Count Down Latch</h1> |
| Instance of cache count down latch can be created by calling the following method: |
| <a href="../../../org/apache/ignite/Ignite.html#countDownLatch-java.lang.String-int-boolean-boolean-"><code>Ignite.countDownLatch(String, int, boolean, boolean)</code></a>.</div> |
| </li> |
| </ul> |
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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></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>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#autoDelete--">autoDelete</a></span>()</code> |
| <div class="block">Gets <code>autoDelete</code> flag.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#await--">await</a></span>()</code> |
| <div class="block">Causes the current thread to wait until the latch has counted down to |
| zero, unless current thread is interrupted.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#await-long-">await</a></span>(long timeout)</code> |
| <div class="block">Causes the current thread to wait until the latch has counted down to |
| zero, unless the thread is interrupted, or the specified waiting time elapses.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#await-long-java.util.concurrent.TimeUnit-">await</a></span>(long timeout, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</a> unit)</code> |
| <div class="block">Causes the current thread to wait until the latch has counted down to |
| zero, unless the thread is interrupted, or the specified waiting time elapses.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#close--">close</a></span>()</code> |
| <div class="block">Removes this count down latch.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#count--">count</a></span>()</code> |
| <div class="block">Gets current count value of the latch.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#countDown--">countDown</a></span>()</code> |
| <div class="block">Decrements the count of the latch, releasing all waiting threads |
| on all nodes if the count reaches zero.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#countDown-int-">countDown</a></span>(int val)</code> |
| <div class="block">Decreases the count of the latch using passed in value, |
| releasing all waiting threads on all nodes if the count reaches zero.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#countDownAll--">countDownAll</a></span>()</code> |
| <div class="block">Counts down this latch to zero, releasing all waiting threads on all nodes.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#initialCount--">initialCount</a></span>()</code> |
| <div class="block">Gets initial count value of the latch.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#name--">name</a></span>()</code> |
| <div class="block">Gets name of the latch.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/ignite/IgniteCountDownLatch.html#removed--">removed</a></span>()</code> |
| <div class="block">Gets <code>removed</code> status of the latch.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="name--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>name</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name()</pre> |
| <div class="block">Gets name of the latch.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Name of the latch.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="count--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>count</h4> |
| <pre>int count()</pre> |
| <div class="block">Gets current count value of the latch.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Current count.</dd> |
| </dl> |
| </li> |
| </ul> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>initialCount</h4> |
| <pre>int initialCount()</pre> |
| <div class="block">Gets initial count value of the latch.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Initial count.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="autoDelete--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>autoDelete</h4> |
| <pre>boolean autoDelete()</pre> |
| <div class="block">Gets <code>autoDelete</code> flag. If this flag is <code>true</code> latch is removed |
| from cache when it has been counted down to 0.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Value of <code>autoDelete</code> flag.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="await--"> |
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| <h4>await</h4> |
| <pre>void await() |
| throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre> |
| <div class="block">Causes the current thread to wait until the latch has counted down to |
| zero, unless current thread is interrupted. |
| <p> |
| If the current count of the latch is zero then this method returns immediately. |
| <p> |
| If the current count is greater than zero then the current |
| thread becomes disabled for thread scheduling purposes and lies |
| dormant until one of two things happen: |
| <ul> |
| <li>The count reaches zero due to invocations of the |
| <a href="../../../org/apache/ignite/IgniteCountDownLatch.html#countDown--"><code>countDown()</code></a> method on any node; or |
| <li>Some other thread interrupts the current thread. |
| </ul> |
| <p> |
| If the current thread: |
| <ul> |
| <li>has its interrupted status set on entry to this method; or |
| <li>is interrupted while waiting, |
| </ul> |
| then <code>IgniteInterruptedCheckedException</code> is thrown and the current thread's |
| interrupted status is cleared.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If operation failed.</dd> |
| <dd><code><a href="../../../org/apache/ignite/IgniteInterruptedException.html" title="class in org.apache.ignite">IgniteInterruptedException</a></code> - if the current thread is interrupted |
| while waiting</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="await-long-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>await</h4> |
| <pre>boolean await(long timeout) |
| throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre> |
| <div class="block">Causes the current thread to wait until the latch has counted down to |
| zero, unless the thread is interrupted, or the specified waiting time elapses. |
| <p> |
| If the current count is zero then this method returns immediately |
| with the value <code>true</code>. |
| <p> |
| If the current count is greater than zero then the current |
| thread becomes disabled for thread scheduling purposes and lies |
| dormant until one of three things happen: |
| <ul> |
| <li>The count reaches zero due to invocations of the |
| <a href="../../../org/apache/ignite/IgniteCountDownLatch.html#countDown--"><code>countDown()</code></a> method on any node; or |
| <li>Some other thread interrupts the current thread; or |
| <li>The specified waiting time elapses. |
| </ul> |
| <p> |
| If the count reaches zero then the method returns with the |
| value <code>true</code>. |
| <p> |
| If the current thread: |
| <ul> |
| <li>has its interrupted status set on entry to this method; or |
| <li>is interrupted while waiting, |
| </ul> |
| then <code>IgniteInterruptedCheckedException</code> is thrown and the current thread's |
| interrupted status is cleared. |
| <p> |
| If the specified waiting time elapses then the value <code>false</code> |
| is returned. If the time is less than or equal to zero, the method |
| will not wait at all.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>timeout</code> - The maximum time to wait in milliseconds.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>True</code> if the count reached zero and <code>false</code> |
| if the waiting time elapsed before the count reached zero.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../org/apache/ignite/IgniteInterruptedException.html" title="class in org.apache.ignite">IgniteInterruptedException</a></code> - If the current thread is interrupted |
| while waiting.</dd> |
| <dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If operation failed.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="await-long-java.util.concurrent.TimeUnit-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>await</h4> |
| <pre>boolean await(long timeout, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</a> unit) |
| throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre> |
| <div class="block">Causes the current thread to wait until the latch has counted down to |
| zero, unless the thread is interrupted, or the specified waiting time elapses. |
| <p> |
| If the current count is zero then this method returns immediately |
| with the value <code>true</code>. |
| <p> |
| If the current count is greater than zero then the current |
| thread becomes disabled for thread scheduling purposes and lies |
| dormant until one of three things happen: |
| <ul> |
| <li>The count reaches zero due to invocations of the |
| <a href="../../../org/apache/ignite/IgniteCountDownLatch.html#countDown--"><code>countDown()</code></a> method on any node; or |
| <li>Some other thread interrupts the current thread; or |
| <li>The specified waiting time elapses. |
| </ul> |
| <p> |
| If the count reaches zero then the method returns with the |
| value <code>true</code>. |
| <p> |
| If the current thread: |
| <ul> |
| <li>has its interrupted status set on entry to this method; or |
| <li>is interrupted while waiting, |
| </ul> |
| then <code>IgniteInterruptedCheckedException</code> is thrown and the current thread's |
| interrupted status is cleared. |
| <p> |
| If the specified waiting time elapses then the value <code>false</code> |
| is returned. If the time is less than or equal to zero, the method |
| will not wait at all.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>timeout</code> - The maximum time to wait.</dd> |
| <dd><code>unit</code> - The time unit of the <code>timeout</code> argument.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>True</code> if the count reached zero and <code>false</code> |
| if the waiting time elapsed before the count reached zero.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../org/apache/ignite/IgniteInterruptedException.html" title="class in org.apache.ignite">IgniteInterruptedException</a></code> - If the current thread is interrupted |
| while waiting.</dd> |
| <dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If operation failed.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="countDown--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>countDown</h4> |
| <pre>int countDown() |
| throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre> |
| <div class="block">Decrements the count of the latch, releasing all waiting threads |
| on all nodes if the count reaches zero. |
| <p> |
| If the current count is greater than zero then it is decremented. |
| If the new count is zero then all waiting threads are re-enabled for |
| thread scheduling purposes. |
| <p> |
| If the current count equals zero then nothing happens.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Count after decrement.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If operation failed.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="countDown-int-"> |
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| <h4>countDown</h4> |
| <pre>int countDown(int val) |
| throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre> |
| <div class="block">Decreases the count of the latch using passed in value, |
| releasing all waiting threads on all nodes if the count reaches zero. |
| <p> |
| If the current count is greater than zero then it is decreased. |
| If the new count is zero then all waiting threads are re-enabled for |
| thread scheduling purposes. |
| <p> |
| If the current count equals zero then nothing happens.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>val</code> - Value to decrease counter on.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Count after decreasing.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If operation failed.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="countDownAll--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>countDownAll</h4> |
| <pre>void countDownAll() |
| throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre> |
| <div class="block">Counts down this latch to zero, releasing all waiting threads on all nodes. |
| <p> |
| If the current count equals zero then nothing happens.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If operation failed.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="removed--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>removed</h4> |
| <pre>boolean removed()</pre> |
| <div class="block">Gets <code>removed</code> status of the latch.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>True</code> if latch was removed from cache, <code>false</code> otherwise.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="close--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>close</h4> |
| <pre>void close()</pre> |
| <div class="block">Removes this count down latch.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true#close--" title="class or interface in java.io">close</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If operation failed.</dd> |
| </dl> |
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| <p class="legalCopy"><small><table width="100%" border="0" cellspacing=0 cellpadding=0 style="padding: 5px"> <tr> <td> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <a target=_blank href="https://ignite.apache.org"><nobr>2021 Copyright © Apache Software Foundation</nobr></a> </td> </tr> </tbody> </table> </td> <td width="100%" align="right" valign="center"> <a href="https://twitter.com/ApacheIgnite" class="twitter-follow-button" data-show-count="false" data-size="large">Follow @ApacheIgnite</a> </td> </tr> <tr> <td colspan="2" valign="top" align="left"> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <b>Ignite Database and Caching Platform</b> </td> <td>: ver. <strong>2.10.0</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>: March 10 2021 </td> </tr> </tbody> </table> </td> </tr> </table></small></p> |
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