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| <h2 title="Class CancellableQueue" class="title">Class CancellableQueue<T></h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.beam.sdk.fn.CancellableQueue<T></li> |
| </ul> |
| </li> |
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| <div class="description"> |
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| <pre><a href="https://static.javadoc.io/com.google.code.findbugs/jsr305/3.0.2/javax/annotation/concurrent/ThreadSafe.html?is-external=true" title="class or interface in javax.annotation.concurrent">@ThreadSafe</a> |
| public class <span class="typeNameLabel">CancellableQueue<T></span> |
| extends java.lang.Object</pre> |
| <div class="block">A simplified <a href="https://static.javadoc.io/com.google.code.findbugs/jsr305/3.0.2/javax/annotation/concurrent/ThreadSafe.html?is-external=true" title="class or interface in javax.annotation.concurrent"><code>ThreadSafe</code></a> blocking queue that can be cancelled freeing any blocked <code>Thread</code>s and preventing future <code>Thread</code>s from blocking. |
| |
| <p>The queue is able to be reset and re-used.</div> |
| </li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#CancellableQueue-int-">CancellableQueue</a></span>(int capacity)</code> |
| <div class="block">Creates a <a href="https://static.javadoc.io/com.google.code.findbugs/jsr305/3.0.2/javax/annotation/concurrent/ThreadSafe.html?is-external=true" title="class or interface in javax.annotation.concurrent"><code>ThreadSafe</code></a> blocking queue with a maximum capacity.</div> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#cancel-java.lang.Exception-">cancel</a></span>(java.lang.Exception exception)</code> |
| <div class="block">Causes any pending and future <a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#put-T-"><code>put(T)</code></a> and <a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#take--"><code>take()</code></a> invocations to throw an exception.</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/beam/sdk/fn/CancellableQueue.html#put-T-">put</a></span>(<a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html" title="type parameter in CancellableQueue">T</a> t)</code> |
| <div class="block">Adds an element to this queue.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#reset--">reset</a></span>()</code> |
| <div class="block">Enables the queue to be re-used after it has been cancelled.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html" title="type parameter in CancellableQueue">T</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#take--">take</a></span>()</code> |
| <div class="block">Takes an element from this queue.</div> |
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| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
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| <h4>CancellableQueue</h4> |
| <pre>public CancellableQueue(int capacity)</pre> |
| <div class="block">Creates a <a href="https://static.javadoc.io/com.google.code.findbugs/jsr305/3.0.2/javax/annotation/concurrent/ThreadSafe.html?is-external=true" title="class or interface in javax.annotation.concurrent"><code>ThreadSafe</code></a> blocking queue with a maximum capacity.</div> |
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| <h4>put</h4> |
| <pre>public void put(<a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html" title="type parameter in CancellableQueue">T</a> t) |
| throws java.lang.Exception, |
| java.lang.InterruptedException</pre> |
| <div class="block">Adds an element to this queue. Will block until the queue is not full or is cancelled.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.lang.InterruptedException</code> - if this thread was interrupted waiting to put the element. The |
| caller must invoke <a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#cancel-java.lang.Exception-"><code>cancel(java.lang.Exception)</code></a> if the interrupt is unrecoverable.</dd> |
| <dd><code>java.lang.Exception</code> - if the queue is cancelled.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="take--"> |
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| <h4>take</h4> |
| <pre>public <a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html" title="type parameter in CancellableQueue">T</a> take() |
| throws java.lang.Exception, |
| java.lang.InterruptedException</pre> |
| <div class="block">Takes an element from this queue. Will block until the queue is not full or is cancelled.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.lang.InterruptedException</code> - if this thread was interrupted waiting for an element. The caller |
| must invoke <a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#cancel-java.lang.Exception-"><code>cancel(java.lang.Exception)</code></a> if the interrupt is unrecoverable.</dd> |
| <dd><code>java.lang.Exception</code> - if the queue is cancelled.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="cancel-java.lang.Exception-"> |
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| <h4>cancel</h4> |
| <pre>public void cancel(java.lang.Exception exception)</pre> |
| <div class="block">Causes any pending and future <a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#put-T-"><code>put(T)</code></a> and <a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#take--"><code>take()</code></a> invocations to throw an exception. |
| |
| <p>The first call to <a href="../../../../../org/apache/beam/sdk/fn/CancellableQueue.html#cancel-java.lang.Exception-"><code>cancel(java.lang.Exception)</code></a> sets the exception that will be thrown. Resetting the |
| queue clears the exception.</div> |
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| <h4>reset</h4> |
| <pre>public void reset()</pre> |
| <div class="block">Enables the queue to be re-used after it has been cancelled.</div> |
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