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SocketHubAppender (Log4j Version 1.2.16)
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org.apache.log4j.net</FONT>
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Class SocketHubAppender</H2>
<PRE>
java.lang.Object
  <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">org.apache.log4j.AppenderSkeleton</A>
      <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.log4j.net.SocketHubAppender</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <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>
</DL>
<HR>
<DL>
<DT><PRE>public class <B>SocketHubAppender</B><DT>extends <A HREF="../../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</A></DL>
</PRE>

<P>
Sends <A HREF="../../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi"><CODE>LoggingEvent</CODE></A> objects to a set of remote log servers,
  usually a <A HREF="../../../../org/apache/log4j/net/SocketNode.html" title="class in org.apache.log4j.net"><CODE>SocketNodes</CODE></A>.

  <p>Acts just like <A HREF="../../../../org/apache/log4j/net/SocketAppender.html" title="class in org.apache.log4j.net"><CODE>SocketAppender</CODE></A> except that instead of
  connecting to a given remote log server,
  <code>SocketHubAppender</code> accepts connections from the remote
  log servers as clients.  It can accept more than one connection.
  When a log event is received, the event is sent to the set of
  currently connected remote log servers. Implemented this way it does
  not require any update to the configuration file to send data to
  another remote log server. The remote log server simply connects to
  the host and port the <code>SocketHubAppender</code> is running on.

  <p>The <code>SocketHubAppender</code> does not store events such
  that the remote side will events that arrived after the
  establishment of its connection. Once connected, events arrive in
  order as guaranteed by the TCP protocol.

  <p>This implementation borrows heavily from the <A HREF="../../../../org/apache/log4j/net/SocketAppender.html" title="class in org.apache.log4j.net"><CODE>SocketAppender</CODE></A>.

  <p>The SocketHubAppender has the following characteristics:

  <ul>

  <p><li>If sent to a <A HREF="../../../../org/apache/log4j/net/SocketNode.html" title="class in org.apache.log4j.net"><CODE>SocketNode</CODE></A>, logging is non-intrusive as
  far as the log event is concerned. In other words, the event will be
  logged with the same time stamp, <A HREF="../../../../org/apache/log4j/NDC.html" title="class in org.apache.log4j"><CODE>NDC</CODE></A>,
  location info as if it were logged locally.

  <p><li><code>SocketHubAppender</code> does not use a layout. It
  ships a serialized <A HREF="../../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi"><CODE>LoggingEvent</CODE></A> object to the remote side.

  <p><li><code>SocketHubAppender</code> relies on the TCP
  protocol. Consequently, if the remote side is reachable, then log
  events will eventually arrive at remote client.

  <p><li>If no remote clients are attached, the logging requests are
  simply dropped.

  <p><li>Logging events are automatically <em>buffered</em> by the
  native TCP implementation. This means that if the link to remote
  client is slow but still faster than the rate of (log) event
  production, the application will not be affected by the slow network
  connection. However, if the network connection is slower then the
  rate of event production, then the local application can only
  progress at the network rate. In particular, if the network link to
  the the remote client is down, the application will be blocked.

  <p>On the other hand, if the network link is up, but the remote
  client is down, the client will not be blocked when making log
  requests but the log events will be lost due to client
  unavailability. 

  <p>The single remote client case extends to multiple clients
  connections. The rate of logging will be determined by the slowest
  link.

  <p><li>If the JVM hosting the <code>SocketHubAppender</code> exits
  before the <code>SocketHubAppender</code> is closed either
  explicitly or subsequent to garbage collection, then there might
  be untransmitted data in the pipe which might be lost. This is a
  common problem on Windows based systems.

  <p>To avoid lost data, it is usually sufficient to <A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#close()"><CODE>close()</CODE></A>
  the <code>SocketHubAppender</code> either explicitly or by calling
  the <A HREF="../../../../org/apache/log4j/LogManager.html#shutdown()"><CODE>LogManager.shutdown()</CODE></A> method before
  exiting the application.

  </ul>
<P>

<P>
<DL>
<DT><B>Author:</B></DT>
  <DD>Mark Womack</DD>
</DL>
<HR>

<P>
<!-- =========== FIELD SUMMARY =========== -->

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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#ZONE">ZONE</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The MulticastDNS zone advertised by a SocketHubAppender</TD>
</TR>
</TABLE>
&nbsp;<A NAME="fields_inherited_from_class_org.apache.log4j.AppenderSkeleton"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Fields inherited from class org.apache.log4j.<A HREF="../../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><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></TD>
</TR>
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&nbsp;
<!-- ======== CONSTRUCTOR SUMMARY ======== -->

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<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#SocketHubAppender()">SocketHubAppender</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#SocketHubAppender(int)">SocketHubAppender</A></B>(int&nbsp;_port)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Connects to remote server at <code>address</code> and <code>port</code>.</TD>
</TR>
</TABLE>
&nbsp;
<!-- ========== METHOD SUMMARY =========== -->

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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#activateOptions()">activateOptions</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set up the socket server on the specified port.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#append(org.apache.log4j.spi.LoggingEvent)">append</A></B>(<A HREF="../../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</A>&nbsp;event)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Append an event to all of current connections.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#cleanUp()">cleanUp</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Release the underlying ServerMonitor thread, and drop the connections
     to all connected remote servers.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#close()">close</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Close this appender.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;java.net.ServerSocket</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#createServerSocket(int)">createServerSocket</A></B>(int&nbsp;socketPort)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates a server socket to accept connections.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#getApplication()">getApplication</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns value of the <b>Application</b> option.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#getBufferSize()">getBufferSize</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns value of the <b>bufferSize</b> option.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#getLocationInfo()">getLocationInfo</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns value of the <b>LocationInfo</b> option.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#getPort()">getPort</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns value of the <b>Port</b> option.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#isAdvertiseViaMulticastDNS()">isAdvertiseViaMulticastDNS</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#requiresLayout()">requiresLayout</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The SocketHubAppender does not use a layout.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#setAdvertiseViaMulticastDNS(boolean)">setAdvertiseViaMulticastDNS</A></B>(boolean&nbsp;advertiseViaMulticastDNS)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#setApplication(java.lang.String)">setApplication</A></B>(java.lang.String&nbsp;lapp)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The <b>App</b> option takes a string value which should be the name of the application getting logged.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#setBufferSize(int)">setBufferSize</A></B>(int&nbsp;_bufferSize)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The <b>BufferSize</b> option takes a positive integer representing the number of events this appender will buffer and send to newly connected
 clients.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#setLocationInfo(boolean)">setLocationInfo</A></B>(boolean&nbsp;_locationInfo)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The <b>LocationInfo</b> option takes a boolean value.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#setPort(int)">setPort</A></B>(int&nbsp;_port)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The <b>Port</b> option takes a positive integer representing
     the port where the server is waiting for connections.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_org.apache.log4j.AppenderSkeleton"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class org.apache.log4j.<A HREF="../../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><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#setErrorHandler(org.apache.log4j.spi.ErrorHandler)">setErrorHandler</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></TD>
</TR>
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&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>

<!-- ============ FIELD DETAIL =========== -->

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<B>Field Detail</B></FONT></TH>
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<A NAME="ZONE"><!-- --></A><H3>
ZONE</H3>
<PRE>
public static final java.lang.String <B>ZONE</B></PRE>
<DL>
<DD>The MulticastDNS zone advertised by a SocketHubAppender
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.log4j.net.SocketHubAppender.ZONE">Constant Field Values</A></DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

<A NAME="constructor_detail"><!-- --></A>
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>

<A NAME="SocketHubAppender()"><!-- --></A><H3>
SocketHubAppender</H3>
<PRE>
public <B>SocketHubAppender</B>()</PRE>
<DL>
</DL>
<HR>

<A NAME="SocketHubAppender(int)"><!-- --></A><H3>
SocketHubAppender</H3>
<PRE>
public <B>SocketHubAppender</B>(int&nbsp;_port)</PRE>
<DL>
<DD>Connects to remote server at <code>address</code> and <code>port</code>.
<P>
</DL>

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
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<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>

<A NAME="activateOptions()"><!-- --></A><H3>
activateOptions</H3>
<PRE>
public void <B>activateOptions</B>()</PRE>
<DL>
<DD>Set up the socket server on the specified port.
<P>
<DD><DL>
<DT><B>Specified by:</B><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><DT><B>Overrides:</B><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></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
public void <B>close</B>()</PRE>
<DL>
<DD>Close this appender. 
     <p>This will mark the appender as closed and
     call then <A HREF="../../../../org/apache/log4j/net/SocketHubAppender.html#cleanUp()"><CODE>cleanUp()</CODE></A> method.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="cleanUp()"><!-- --></A><H3>
cleanUp</H3>
<PRE>
public void <B>cleanUp</B>()</PRE>
<DL>
<DD>Release the underlying ServerMonitor thread, and drop the connections
     to all connected remote servers.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="append(org.apache.log4j.spi.LoggingEvent)"><!-- --></A><H3>
append</H3>
<PRE>
public void <B>append</B>(<A HREF="../../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</A>&nbsp;event)</PRE>
<DL>
<DD>Append an event to all of current connections.
<P>
<DD><DL>
<DT><B>Specified by:</B><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></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="requiresLayout()"><!-- --></A><H3>
requiresLayout</H3>
<PRE>
public boolean <B>requiresLayout</B>()</PRE>
<DL>
<DD>The SocketHubAppender does not use a layout. Hence, this method returns
     <code>false</code>.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="setPort(int)"><!-- --></A><H3>
setPort</H3>
<PRE>
public void <B>setPort</B>(int&nbsp;_port)</PRE>
<DL>
<DD>The <b>Port</b> option takes a positive integer representing
     the port where the server is waiting for connections.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="setApplication(java.lang.String)"><!-- --></A><H3>
setApplication</H3>
<PRE>
public void <B>setApplication</B>(java.lang.String&nbsp;lapp)</PRE>
<DL>
<DD>The <b>App</b> option takes a string value which should be the name of the application getting logged. If property was already set (via system
 property), don't set here.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getApplication()"><!-- --></A><H3>
getApplication</H3>
<PRE>
public java.lang.String <B>getApplication</B>()</PRE>
<DL>
<DD>Returns value of the <b>Application</b> option.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getPort()"><!-- --></A><H3>
getPort</H3>
<PRE>
public int <B>getPort</B>()</PRE>
<DL>
<DD>Returns value of the <b>Port</b> option.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="setBufferSize(int)"><!-- --></A><H3>
setBufferSize</H3>
<PRE>
public void <B>setBufferSize</B>(int&nbsp;_bufferSize)</PRE>
<DL>
<DD>The <b>BufferSize</b> option takes a positive integer representing the number of events this appender will buffer and send to newly connected
 clients.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getBufferSize()"><!-- --></A><H3>
getBufferSize</H3>
<PRE>
public int <B>getBufferSize</B>()</PRE>
<DL>
<DD>Returns value of the <b>bufferSize</b> option.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="setLocationInfo(boolean)"><!-- --></A><H3>
setLocationInfo</H3>
<PRE>
public void <B>setLocationInfo</B>(boolean&nbsp;_locationInfo)</PRE>
<DL>
<DD>The <b>LocationInfo</b> option takes a boolean value. If true,
     the information sent to the remote host will include location
     information. By default no location information is sent to the server.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getLocationInfo()"><!-- --></A><H3>
getLocationInfo</H3>
<PRE>
public boolean <B>getLocationInfo</B>()</PRE>
<DL>
<DD>Returns value of the <b>LocationInfo</b> option.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="setAdvertiseViaMulticastDNS(boolean)"><!-- --></A><H3>
setAdvertiseViaMulticastDNS</H3>
<PRE>
public void <B>setAdvertiseViaMulticastDNS</B>(boolean&nbsp;advertiseViaMulticastDNS)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="isAdvertiseViaMulticastDNS()"><!-- --></A><H3>
isAdvertiseViaMulticastDNS</H3>
<PRE>
public boolean <B>isAdvertiseViaMulticastDNS</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="createServerSocket(int)"><!-- --></A><H3>
createServerSocket</H3>
<PRE>
protected java.net.ServerSocket <B>createServerSocket</B>(int&nbsp;socketPort)
                                            throws java.io.IOException</PRE>
<DL>
<DD>Creates a server socket to accept connections.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>socketPort</CODE> - port on which the socket should listen, may be zero.
<DT><B>Returns:</B><DD>new socket.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - IO error when opening the socket.</DL>
</DD>
</DL>
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