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<div class="subTitle">org.apache.commons.io.output</div>
<h2 title="Class ThresholdingOutputStream" class="title">Class ThresholdingOutputStream</h2>
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<dd><a href="../../../../../org/apache/commons/io/output/DeferredFileOutputStream.html" title="class in org.apache.commons.io.output">DeferredFileOutputStream</a></dd>
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<pre>public abstract class <span class="typeNameLabel">ThresholdingOutputStream</span>
extends <a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></pre>
<div class="block">An output stream which triggers an event when a specified number of bytes of
 data have been written to it. The event can be used, for example, to throw
 an exception if a maximum has been reached, or to switch the underlying
 stream type when the threshold is exceeded.
 <p>
 This class overrides all <code>OutputStream</code> methods. However, these
 overrides ultimately call the corresponding methods in the underlying output
 stream implementation.
 <p>
 NOTE: This implementation may trigger the event <em>before</em> the threshold
 is actually reached, since it triggers when a pending write operation would
 cause the threshold to be exceeded.</div>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#ThresholdingOutputStream-int-">ThresholdingOutputStream</a></span>(int&nbsp;threshold)</code>
<div class="block">Constructs an instance of this class which will trigger an event at the
 specified threshold.</div>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#checkThreshold-int-">checkThreshold</a></span>(int&nbsp;count)</code>
<div class="block">Checks to see if writing the specified number of bytes would cause the
 configured threshold to be exceeded.</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/commons/io/output/ThresholdingOutputStream.html#close--">close</a></span>()</code>
<div class="block">Closes this output stream and releases any system resources associated
 with this stream.</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/commons/io/output/ThresholdingOutputStream.html#flush--">flush</a></span>()</code>
<div class="block">Flushes this output stream and forces any buffered output bytes to be
 written out.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#getByteCount--">getByteCount</a></span>()</code>
<div class="block">Returns the number of bytes that have been written to this output stream.</div>
</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>protected abstract <a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#getStream--">getStream</a></span>()</code>
<div class="block">Returns the underlying output stream, to which the corresponding
 <code>OutputStream</code> methods in this class will ultimately delegate.</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/commons/io/output/ThresholdingOutputStream.html#getThreshold--">getThreshold</a></span>()</code>
<div class="block">Returns the threshold, in bytes, at which an event will be triggered.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#isThresholdExceeded--">isThresholdExceeded</a></span>()</code>
<div class="block">Determines whether or not the configured threshold has been exceeded for
 this output stream.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#resetByteCount--">resetByteCount</a></span>()</code>
<div class="block">Resets the byteCount to zero.</div>
</td>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#setByteCount-long-">setByteCount</a></span>(long&nbsp;count)</code>
<div class="block">Sets the byteCount to count.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>protected abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#thresholdReached--">thresholdReached</a></span>()</code>
<div class="block">Indicates that the configured threshold has been reached, and that a
 subclass should take whatever action necessary on this event.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#write-byte:A-">write</a></span>(byte[]&nbsp;b)</code>
<div class="block">Writes <code>b.length</code> bytes from the specified byte array to this
 output stream.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#write-byte:A-int-int-">write</a></span>(byte[]&nbsp;b,
     int&nbsp;off,
     int&nbsp;len)</code>
<div class="block">Writes <code>len</code> bytes from the specified byte array starting at
 offset <code>off</code> to this output stream.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#write-int-">write</a></span>(int&nbsp;b)</code>
<div class="block">Writes the specified byte to this output stream.</div>
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<h4>ThresholdingOutputStream</h4>
<pre>public&nbsp;ThresholdingOutputStream(int&nbsp;threshold)</pre>
<div class="block">Constructs an instance of this class which will trigger an event at the
 specified threshold.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>threshold</code> - The number of bytes at which to trigger an event.</dd>
</dl>
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<h4>write</h4>
<pre>public&nbsp;void&nbsp;write(int&nbsp;b)
           throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Writes the specified byte to this output stream.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true#write-int-" title="class or interface in java.io">write</a></code>&nbsp;in class&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>b</code> - The byte to be written.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an error occurs.</dd>
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<pre>public&nbsp;void&nbsp;write(byte[]&nbsp;b)
           throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Writes <code>b.length</code> bytes from the specified byte array to this
 output stream.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true#write-byte:A-" title="class or interface in java.io">write</a></code>&nbsp;in class&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>b</code> - The array of bytes to be written.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an error occurs.</dd>
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<pre>public&nbsp;void&nbsp;write(byte[]&nbsp;b,
                  int&nbsp;off,
                  int&nbsp;len)
           throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Writes <code>len</code> bytes from the specified byte array starting at
 offset <code>off</code> to this output stream.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true#write-byte:A-int-int-" title="class or interface in java.io">write</a></code>&nbsp;in class&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>b</code> - The byte array from which the data will be written.</dd>
<dd><code>off</code> - The start offset in the byte array.</dd>
<dd><code>len</code> - The number of bytes to write.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an error occurs.</dd>
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<h4>flush</h4>
<pre>public&nbsp;void&nbsp;flush()
           throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Flushes this output stream and forces any buffered output bytes to be
 written out.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Flushable.html?is-external=true#flush--" title="class or interface in java.io">flush</a></code>&nbsp;in interface&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Flushable.html?is-external=true" title="class or interface in java.io">Flushable</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true#flush--" title="class or interface in java.io">flush</a></code>&nbsp;in class&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an error occurs.</dd>
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<h4>close</h4>
<pre>public&nbsp;void&nbsp;close()
           throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Closes this output stream and releases any system resources associated
 with this stream.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true#close--" title="class or interface in java.io">close</a></code>&nbsp;in interface&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code>&nbsp;in interface&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true#close--" title="class or interface in java.io">close</a></code>&nbsp;in class&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an error occurs.</dd>
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<pre>public&nbsp;int&nbsp;getThreshold()</pre>
<div class="block">Returns the threshold, in bytes, at which an event will be triggered.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The threshold point, in bytes.</dd>
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<h4>getByteCount</h4>
<pre>public&nbsp;long&nbsp;getByteCount()</pre>
<div class="block">Returns the number of bytes that have been written to this output stream.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The number of bytes written.</dd>
</dl>
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<pre>public&nbsp;boolean&nbsp;isThresholdExceeded()</pre>
<div class="block">Determines whether or not the configured threshold has been exceeded for
 this output stream.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>true</code> if the threshold has been reached;
         <code>false</code> otherwise.</dd>
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<pre>protected&nbsp;void&nbsp;checkThreshold(int&nbsp;count)
                       throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Checks to see if writing the specified number of bytes would cause the
 configured threshold to be exceeded. If so, triggers an event to allow
 a concrete implementation to take action on this.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>count</code> - The number of bytes about to be written to the underlying
              output stream.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an error occurs.</dd>
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<pre>protected&nbsp;void&nbsp;resetByteCount()</pre>
<div class="block">Resets the byteCount to zero.  You can call this from
 <a href="../../../../../org/apache/commons/io/output/ThresholdingOutputStream.html#thresholdReached--"><code>thresholdReached()</code></a> if you want the event to be triggered again.</div>
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<pre>protected&nbsp;void&nbsp;setByteCount(long&nbsp;count)</pre>
<div class="block">Sets the byteCount to count.  Useful for re-opening an output stream
 that has previously been written to.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>count</code> - The number of bytes that have already been written to the
 output stream</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.5</dd>
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<pre>protected abstract&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;getStream()
                                   throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Returns the underlying output stream, to which the corresponding
 <code>OutputStream</code> methods in this class will ultimately delegate.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The underlying output stream.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an error occurs.</dd>
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<pre>protected abstract&nbsp;void&nbsp;thresholdReached()
                                  throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Indicates that the configured threshold has been reached, and that a
 subclass should take whatever action necessary on this event. This may
 include changing the underlying output stream.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an error occurs.</dd>
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