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| <div class="subTitle">org.apache.log4j</div> |
| <h2 title="Class WriterAppender" class="title">Class WriterAppender</h2> |
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| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">org.apache.log4j.AppenderSkeleton</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.log4j.WriterAppender</li> |
| </ul> |
| </li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</a>, <a href="../../../org/apache/log4j/spi/OptionHandler.html" title="interface in org.apache.log4j.spi">OptionHandler</a></dd> |
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| <pre>public class <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.36">WriterAppender</a> |
| extends <a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</a></pre> |
| <div class="block">WriterAppender appends log events to a <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Writer.html?is-external=true" title="class or interface in java.io"><code>Writer</code></a> or an |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io"><code>OutputStream</code></a> depending on the user's choice.</div> |
| </li> |
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| <!-- ======== NESTED CLASS SUMMARY ======== --> |
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| <h3>Nested Class Summary</h3> |
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| <!-- --> |
| </a> |
| <h3>Nested classes/interfaces inherited from class org.apache.log4j.<a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</a></h3> |
| <code><a href="../../../org/apache/log4j/AppenderSkeleton.NoOpErrorHandler.html" title="class in org.apache.log4j">AppenderSkeleton.NoOpErrorHandler</a></code></li> |
| </ul> |
| </li> |
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| <h3>Field Summary</h3> |
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| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <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/log4j/WriterAppender.html#encoding">encoding</a></span></code> |
| <div class="block">The encoding to use when writing.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#immediateFlush">immediateFlush</a></span></code> |
| <div class="block">Immediate flush means that the underlying writer or output stream |
| will be flushed at the end of each append operation unless shouldFlush() |
| is overridden.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../org/apache/log4j/helpers/QuietWriter.html" title="class in org.apache.log4j.helpers">QuietWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#qw">qw</a></span></code> |
| <div class="block">This is the <a href="../../../org/apache/log4j/helpers/QuietWriter.html" title="class in org.apache.log4j.helpers"><code>quietWriter</code></a> where we will write |
| to.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="fields.inherited.from.class.org.apache.log4j.AppenderSkeleton"> |
| <!-- --> |
| </a> |
| <h3>Fields inherited from class org.apache.log4j.<a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</a></h3> |
| <code><a href="../../../org/apache/log4j/AppenderSkeleton.html#closed">closed</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#errorHandler">errorHandler</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#headFilter">headFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#layout">layout</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#name">name</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#tailFilter">tailFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#threshold">threshold</a></code></li> |
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| <h3>Constructor Summary</h3> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#WriterAppender--">WriterAppender</a></span>()</code> |
| <div class="block">This default constructor does nothing.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#WriterAppender-org.apache.log4j.Layout-java.io.OutputStream-">WriterAppender</a></span>(<a href="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</a> layout, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a> os)</code> |
| <div class="block">Instantiate a WriterAppender and set the output destination to a |
| new <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStreamWriter.html?is-external=true" title="class or interface in java.io"><code>OutputStreamWriter</code></a> initialized with <code>os</code> |
| as its <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io"><code>OutputStream</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#WriterAppender-org.apache.log4j.Layout-java.io.Writer-">WriterAppender</a></span>(<a href="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</a> layout, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Writer.html?is-external=true" title="class or interface in java.io">Writer</a> writer)</code> |
| <div class="block">Instantiate a WriterAppender and set the output destination to |
| <code>writer</code>.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| </a> |
| <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="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete 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>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#activateOptions--">activateOptions</a></span>()</code> |
| <div class="block">Does nothing.</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/log4j/WriterAppender.html#append-org.apache.log4j.spi.LoggingEvent-">append</a></span>(<a href="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</a> event)</code> |
| <div class="block">This method is called by the <a href="../../../org/apache/log4j/AppenderSkeleton.html#doAppend-org.apache.log4j.spi.LoggingEvent-"><code>AppenderSkeleton.doAppend(org.apache.log4j.spi.LoggingEvent)</code></a> |
| method.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#checkEntryConditions--">checkEntryConditions</a></span>()</code> |
| <div class="block">This method determines if there is a sense in attempting to append.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#close--">close</a></span>()</code> |
| <div class="block">Close this appender instance.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#closeWriter--">closeWriter</a></span>()</code> |
| <div class="block">Close the underlying <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Writer.html?is-external=true" title="class or interface in java.io"><code>Writer</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStreamWriter.html?is-external=true" title="class or interface in java.io">OutputStreamWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#createWriter-java.io.OutputStream-">createWriter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a> os)</code> |
| <div class="block">Returns an OutputStreamWriter when passed an OutputStream.</div> |
| </td> |
| </tr> |
| <tr id="i6" 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/log4j/WriterAppender.html#getEncoding--">getEncoding</a></span>()</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#getImmediateFlush--">getImmediateFlush</a></span>()</code> |
| <div class="block">Returns value of the <b>ImmediateFlush</b> option.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#requiresLayout--">requiresLayout</a></span>()</code> |
| <div class="block">The WriterAppender requires a layout.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#reset--">reset</a></span>()</code> |
| <div class="block">Clear internal references to the writer and other variables.</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/log4j/WriterAppender.html#setEncoding-java.lang.String-">setEncoding</a></span>(<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> value)</code> </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/log4j/WriterAppender.html#setErrorHandler-org.apache.log4j.spi.ErrorHandler-">setErrorHandler</a></span>(<a href="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi">ErrorHandler</a> eh)</code> |
| <div class="block">Set the <a href="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi"><code>ErrorHandler</code></a> for this WriterAppender and also the |
| underlying <a href="../../../org/apache/log4j/helpers/QuietWriter.html" title="class in org.apache.log4j.helpers"><code>QuietWriter</code></a> if any.</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/log4j/WriterAppender.html#setImmediateFlush-boolean-">setImmediateFlush</a></span>(boolean value)</code> |
| <div class="block">If the <b>ImmediateFlush</b> option is set to |
| <code>true</code>, the appender will flush at the end of each |
| write.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#setWriter-java.io.Writer-">setWriter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/Writer.html?is-external=true" title="class or interface in java.io">Writer</a> writer)</code> |
| <div class="block">Sets the Writer where the log output will go.</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#shouldFlush-org.apache.log4j.spi.LoggingEvent-">shouldFlush</a></span>(<a href="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</a> event)</code> |
| <div class="block">Determines whether the writer should be flushed after |
| this event is written.</div> |
| </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#subAppend-org.apache.log4j.spi.LoggingEvent-">subAppend</a></span>(<a href="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</a> event)</code> |
| <div class="block">Actual writing occurs here.</div> |
| </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#writeFooter--">writeFooter</a></span>()</code> |
| <div class="block">Write a footer as produced by the embedded layout's <a href="../../../org/apache/log4j/Layout.html#getFooter--"><code>Layout.getFooter()</code></a> method.</div> |
| </td> |
| </tr> |
| <tr id="i17" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/WriterAppender.html#writeHeader--">writeHeader</a></span>()</code> |
| <div class="block">Write a header as produced by the embedded layout's <a href="../../../org/apache/log4j/Layout.html#getHeader--"><code>Layout.getHeader()</code></a> method.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.org.apache.log4j.AppenderSkeleton"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.log4j.<a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</a></h3> |
| <code><a href="../../../org/apache/log4j/AppenderSkeleton.html#addFilter-org.apache.log4j.spi.Filter-">addFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#clearFilters--">clearFilters</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#doAppend-org.apache.log4j.spi.LoggingEvent-">doAppend</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#finalize--">finalize</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getErrorHandler--">getErrorHandler</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getFilter--">getFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getFirstFilter--">getFirstFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getLayout--">getLayout</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getName--">getName</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getThreshold--">getThreshold</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#isAsSevereAsThreshold-org.apache.log4j.Priority-">isAsSevereAsThreshold</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#setLayout-org.apache.log4j.Layout-">setLayout</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#setName-java.lang.String-">setName</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#setThreshold-org.apache.log4j.Priority-">setThreshold</a></code></li> |
| </ul> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a name="immediateFlush"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>immediateFlush</h4> |
| <pre>protected boolean <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.52">immediateFlush</a></pre> |
| <div class="block">Immediate flush means that the underlying writer or output stream |
| will be flushed at the end of each append operation unless shouldFlush() |
| is overridden. Immediate |
| flush is slower but ensures that each append request is actually |
| written. If <code>immediateFlush</code> is set to |
| <code>false</code>, then there is a good chance that the last few |
| logs events are not actually written to persistent media if and |
| when the application crashes. |
| |
| <p>The <code>immediateFlush</code> variable is set to |
| <code>true</code> by default.</div> |
| </li> |
| </ul> |
| <a name="encoding"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>encoding</h4> |
| <pre>protected <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> <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.60">encoding</a></pre> |
| <div class="block">The encoding to use when writing. <p>The |
| <code>encoding</code> variable is set to <code>null</null> by |
| default which results in the utilization of the system's default |
| encoding.</div> |
| </li> |
| </ul> |
| <a name="qw"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>qw</h4> |
| <pre>protected <a href="../../../org/apache/log4j/helpers/QuietWriter.html" title="class in org.apache.log4j.helpers">QuietWriter</a> <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.66">qw</a></pre> |
| <div class="block">This is the <a href="../../../org/apache/log4j/helpers/QuietWriter.html" title="class in org.apache.log4j.helpers"><code>quietWriter</code></a> where we will write |
| to.</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="WriterAppender--"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>WriterAppender</h4> |
| <pre>public <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.72">WriterAppender</a>()</pre> |
| <div class="block">This default constructor does nothing.</div> |
| </li> |
| </ul> |
| <a name="WriterAppender-org.apache.log4j.Layout-java.io.OutputStream-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>WriterAppender</h4> |
| <pre>public <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.80">WriterAppender</a>(<a href="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</a> layout, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a> os)</pre> |
| <div class="block">Instantiate a WriterAppender and set the output destination to a |
| new <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStreamWriter.html?is-external=true" title="class or interface in java.io"><code>OutputStreamWriter</code></a> initialized with <code>os</code> |
| as its <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io"><code>OutputStream</code></a>.</div> |
| </li> |
| </ul> |
| <a name="WriterAppender-org.apache.log4j.Layout-java.io.Writer-"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>WriterAppender</h4> |
| <pre>public <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.91">WriterAppender</a>(<a href="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</a> layout, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Writer.html?is-external=true" title="class or interface in java.io">Writer</a> writer)</pre> |
| <div class="block">Instantiate a WriterAppender and set the output destination to |
| <code>writer</code>. |
| |
| <p>The <code>writer</code> must have been previously opened by |
| the user.</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
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| </a> |
| <h3>Method Detail</h3> |
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| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getImmediateFlush</h4> |
| <pre>public boolean <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.100">getImmediateFlush</a>()</pre> |
| <div class="block">Returns value of the <b>ImmediateFlush</b> option.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the value of the immediate flush setting.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setImmediateFlush-boolean-"> |
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| <ul class="blockList"> |
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| <h4>setImmediateFlush</h4> |
| <pre>public void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.120">setImmediateFlush</a>(boolean value)</pre> |
| <div class="block">If the <b>ImmediateFlush</b> option is set to |
| <code>true</code>, the appender will flush at the end of each |
| write. This is the default behavior. If the option is set to |
| <code>false</code>, then the underlying stream can defer writing |
| to physical medium to a later time. |
| |
| <p>Avoiding the flush operation at the end of each append results in |
| a performance gain of 10 to 20 percent. However, there is safety |
| tradeoff involved in skipping flushing. Indeed, when flushing is |
| skipped, then it is likely that the last few log events will not |
| be recorded on disk when the application exits. This is a high |
| price to pay even for a 20% performance gain.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>value</code> - the value to set the immediate flush setting to.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="activateOptions--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>activateOptions</h4> |
| <pre>public void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.127">activateOptions</a>()</pre> |
| <div class="block">Does nothing.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../org/apache/log4j/spi/OptionHandler.html#activateOptions--">activateOptions</a></code> in interface <code><a href="../../../org/apache/log4j/spi/OptionHandler.html" title="interface in org.apache.log4j.spi">OptionHandler</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../org/apache/log4j/AppenderSkeleton.html#activateOptions--">activateOptions</a></code> in class <code><a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="append-org.apache.log4j.spi.LoggingEvent-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>append</h4> |
| <pre>public void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.142">append</a>(<a href="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</a> event)</pre> |
| <div class="block">This method is called by the <a href="../../../org/apache/log4j/AppenderSkeleton.html#doAppend-org.apache.log4j.spi.LoggingEvent-"><code>AppenderSkeleton.doAppend(org.apache.log4j.spi.LoggingEvent)</code></a> |
| method. |
| |
| <p>If the output stream exists and is writable then write a log |
| statement to the output stream. Otherwise, write a single warning |
| message to <code>System.err</code>. |
| |
| <p>The format of the output will depend on this appender's |
| layout.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../org/apache/log4j/AppenderSkeleton.html#append-org.apache.log4j.spi.LoggingEvent-">append</a></code> in class <code><a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="checkEntryConditions--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>checkEntryConditions</h4> |
| <pre>protected boolean <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.167">checkEntryConditions</a>()</pre> |
| <div class="block">This method determines if there is a sense in attempting to append. |
| |
| <p>It checks whether there is a set output target and also if |
| there is a set layout. If these checks fail, then the boolean |
| value <code>false</code> is returned.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if appending is allowed, false otherwise.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="close--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>close</h4> |
| <pre>public void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.196">close</a>()</pre> |
| <div class="block">Close this appender instance. The underlying stream or writer is |
| also closed. |
| |
| <p>Closed appenders cannot be reused.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>0.8.4</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../org/apache/log4j/WriterAppender.html#setWriter-java.io.Writer-"><code>setWriter(java.io.Writer)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="closeWriter--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>closeWriter</h4> |
| <pre>protected void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.208">closeWriter</a>()</pre> |
| <div class="block">Close the underlying <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Writer.html?is-external=true" title="class or interface in java.io"><code>Writer</code></a>.</div> |
| </li> |
| </ul> |
| <a name="createWriter-java.io.OutputStream-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>createWriter</h4> |
| <pre>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStreamWriter.html?is-external=true" title="class or interface in java.io">OutputStreamWriter</a> <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.232">createWriter</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a> os)</pre> |
| <div class="block">Returns an OutputStreamWriter when passed an OutputStream. The |
| encoding used will depend on the value of the |
| <code>encoding</code> property. If the encoding value is |
| specified incorrectly the writer will be opened using the default |
| system encoding (an error message will be printed to the LOGGER.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>os</code> - The OutputStream.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The OutputStreamWriter.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getEncoding--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getEncoding</h4> |
| <pre>public <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> <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.253">getEncoding</a>()</pre> |
| </li> |
| </ul> |
| <a name="setEncoding-java.lang.String-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setEncoding</h4> |
| <pre>public void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.257">setEncoding</a>(<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> value)</pre> |
| </li> |
| </ul> |
| <a name="setErrorHandler-org.apache.log4j.spi.ErrorHandler-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setErrorHandler</h4> |
| <pre>public void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.266">setErrorHandler</a>(<a href="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi">ErrorHandler</a> eh)</pre> |
| <div class="block">Set the <a href="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi"><code>ErrorHandler</code></a> for this WriterAppender and also the |
| underlying <a href="../../../org/apache/log4j/helpers/QuietWriter.html" title="class in org.apache.log4j.helpers"><code>QuietWriter</code></a> if any.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../org/apache/log4j/Appender.html#setErrorHandler-org.apache.log4j.spi.ErrorHandler-">setErrorHandler</a></code> in interface <code><a href="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../org/apache/log4j/AppenderSkeleton.html#setErrorHandler-org.apache.log4j.spi.ErrorHandler-">setErrorHandler</a></code> in class <code><a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>eh</code> - The error handler.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setWriter-java.io.Writer-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setWriter</h4> |
| <pre>public void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.291">setWriter</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/Writer.html?is-external=true" title="class or interface in java.io">Writer</a> writer)</pre> |
| <div class="block"><p>Sets the Writer where the log output will go. The |
| specified Writer must be opened by the user and be |
| writable. |
| |
| <p>The <code>java.io.Writer</code> will be closed when the |
| appender instance is closed. |
| |
| |
| <p><b>WARNING:</b> Logging to an unopened Writer will fail. |
| <p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>writer</code> - An already opened Writer.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="subAppend-org.apache.log4j.spi.LoggingEvent-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>subAppend</h4> |
| <pre>protected void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.308">subAppend</a>(<a href="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</a> event)</pre> |
| <div class="block">Actual writing occurs here. |
| |
| <p>Most subclasses of <code>WriterAppender</code> will need to |
| override this method.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>event</code> - The event to log.</dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>0.9.0</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="requiresLayout--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>requiresLayout</h4> |
| <pre>public boolean <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.332">requiresLayout</a>()</pre> |
| <div class="block">The WriterAppender requires a layout. Hence, this method returns |
| <code>true</code>.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if a Layout is required.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="reset--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reset</h4> |
| <pre>protected void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.342">reset</a>()</pre> |
| <div class="block">Clear internal references to the writer and other variables. |
| <p> |
| Subclasses can override this method for an alternate closing |
| behavior.</div> |
| </li> |
| </ul> |
| <a name="writeFooter--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>writeFooter</h4> |
| <pre>protected void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.353">writeFooter</a>()</pre> |
| <div class="block">Write a footer as produced by the embedded layout's <a href="../../../org/apache/log4j/Layout.html#getFooter--"><code>Layout.getFooter()</code></a> method.</div> |
| </li> |
| </ul> |
| <a name="writeHeader--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>writeHeader</h4> |
| <pre>protected void <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.367">writeHeader</a>()</pre> |
| <div class="block">Write a header as produced by the embedded layout's <a href="../../../org/apache/log4j/Layout.html#getHeader--"><code>Layout.getHeader()</code></a> method.</div> |
| </li> |
| </ul> |
| <a name="shouldFlush-org.apache.log4j.spi.LoggingEvent-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>shouldFlush</h4> |
| <pre>protected boolean <a href="../../../src-html/org/apache/log4j/WriterAppender.html#line.384">shouldFlush</a>(<a href="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</a> event)</pre> |
| <div class="block">Determines whether the writer should be flushed after |
| this event is written.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>event</code> - The event to log.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the writer should be flushed.</dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.2.16</dd> |
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