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ThreadContext (Log4J API 2.0-alpha1 API)
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org.apache.logging.log4j</FONT>
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Class ThreadContext</H2>
<PRE>
<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.logging.log4j.ThreadContext</B>
</PRE>
<HR>
<DL>
<DT><PRE>public final class <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.32"><B>ThreadContext</B></A><DT>extends <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
</PRE>
<P>
The ThreadContext allows applications to store information either in a Map
<p/>
<p><b><em>The MDC is managed on a per thread basis</em></b>. A
child thread automatically inherits a <em>copy</em> of the mapped
diagnostic context of its parent.
<P>
<P>
<HR>
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#clear()">clear</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clear the context.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#clearStack()">clearStack</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clear the stack for this thread.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/util/Stack.html?is-external=true" title="class or interface in java.util">Stack</A>&lt;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&gt;</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#cloneStack()">cloneStack</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return a copy of this thread's stack.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#containsKey(java.lang.String)">containsKey</A></B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;key)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Determine if the key is in the context.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#get(java.lang.String)">get</A></B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;key)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the context identified by the <code>key</code> parameter.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A>&lt;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>,<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&gt;</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#getContext()">getContext</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the current thread's MDC as a hashtable.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#getDepth()">getDepth</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the current nesting depth of this thread's stack.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#peek()">peek</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Looks at the last diagnostic context at the top of this NDC
without removing it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#pop()">pop</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the value of the last item placed on the stack.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#push(java.lang.String)">push</A></B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;message)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Push new diagnostic context information for the current thread.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#put(java.lang.String, java.lang.String)">put</A></B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;key,
<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;value)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Put a context value (the <code>o</code> parameter) as identified
with the <code>key</code> parameter into the current thread's
context map.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#remove(java.lang.String)">remove</A></B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;key)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Remove the the context identified by the <code>key</code>
parameter.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#removeStack()">removeStack</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Remove the diagnostic context for this thread.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#setMaxDepth(int)">setMaxDepth</A></B>(int&nbsp;maxDepth)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set maximum depth of this diagnostic context.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#setStack(java.util.Stack)">setStack</A></B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/util/Stack.html?is-external=true" title="class or interface in java.util">Stack</A>&lt;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&gt;&nbsp;stack)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set this thread's stack.</TD>
</TR>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
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<TD><CODE><A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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<A NAME="put(java.lang.String, java.lang.String)"><!-- --></A><H3>
put</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.64"><B>put</B></A>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;key,
<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;value)</PRE>
<DL>
<DD>Put a context value (the <code>o</code> parameter) as identified
with the <code>key</code> parameter into the current thread's
context map.
<p/>
<p>If the current thread does not have a context map it is
created as a side effect.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - The key name.<DD><CODE>value</CODE> - The key value.</DL>
</DD>
</DL>
<HR>
<A NAME="get(java.lang.String)"><!-- --></A><H3>
get</H3>
<PRE>
public static <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.80"><B>get</B></A>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;key)</PRE>
<DL>
<DD>Get the context identified by the <code>key</code> parameter.
<p/>
<p>This method has no side effects.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - The key to locate.
<DT><B>Returns:</B><DD>The value associated with the key or null.</DL>
</DD>
</DL>
<HR>
<A NAME="remove(java.lang.String)"><!-- --></A><H3>
remove</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.90"><B>remove</B></A>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;key)</PRE>
<DL>
<DD>Remove the the context identified by the <code>key</code>
parameter.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - The key to remove.</DL>
</DD>
</DL>
<HR>
<A NAME="clear()"><!-- --></A><H3>
clear</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.100"><B>clear</B></A>()</PRE>
<DL>
<DD>Clear the context.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="containsKey(java.lang.String)"><!-- --></A><H3>
containsKey</H3>
<PRE>
public static boolean <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.109"><B>containsKey</B></A>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;key)</PRE>
<DL>
<DD>Determine if the key is in the context.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - The key to locate.
<DT><B>Returns:</B><DD>True if the key is in the context, false otherwise.</DL>
</DD>
</DL>
<HR>
<A NAME="getContext()"><!-- --></A><H3>
getContext</H3>
<PRE>
public static <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A>&lt;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>,<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&gt; <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.119"><B>getContext</B></A>()</PRE>
<DL>
<DD>Get the current thread's MDC as a hashtable. This method is
intended to be used internally.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>a copy of the context.</DL>
</DD>
</DL>
<HR>
<A NAME="clearStack()"><!-- --></A><H3>
clearStack</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.127"><B>clearStack</B></A>()</PRE>
<DL>
<DD>Clear the stack for this thread.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="cloneStack()"><!-- --></A><H3>
cloneStack</H3>
<PRE>
public static <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/util/Stack.html?is-external=true" title="class or interface in java.util">Stack</A>&lt;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&gt; <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.135"><B>cloneStack</B></A>()</PRE>
<DL>
<DD>Return a copy of this thread's stack.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>A copy of this thread's stack.</DL>
</DD>
</DL>
<HR>
<A NAME="setStack(java.util.Stack)"><!-- --></A><H3>
setStack</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.144"><B>setStack</B></A>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/util/Stack.html?is-external=true" title="class or interface in java.util">Stack</A>&lt;<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&gt;&nbsp;stack)</PRE>
<DL>
<DD>Set this thread's stack.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>stack</CODE> - The stack to use.</DL>
</DD>
</DL>
<HR>
<A NAME="getDepth()"><!-- --></A><H3>
getDepth</H3>
<PRE>
public static int <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.154"><B>getDepth</B></A>()</PRE>
<DL>
<DD>Get the current nesting depth of this thread's stack.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the number of items in the stack.<DT><B>See Also:</B><DD><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#setMaxDepth(int)"><CODE>setMaxDepth(int)</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="pop()"><!-- --></A><H3>
pop</H3>
<PRE>
public static <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.167"><B>pop</B></A>()</PRE>
<DL>
<DD>Returns the value of the last item placed on the stack.
<p/>
<p>The returned value is the value that was pushed last. If no
context is available, then the empty string "" is returned.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>String The innermost diagnostic context.</DL>
</DD>
</DL>
<HR>
<A NAME="peek()"><!-- --></A><H3>
peek</H3>
<PRE>
public static <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.184"><B>peek</B></A>()</PRE>
<DL>
<DD>Looks at the last diagnostic context at the top of this NDC
without removing it.
<p/>
<p>The returned value is the value that was pushed last. If no
context is available, then the empty string "" is returned.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>String The innermost diagnostic context.</DL>
</DD>
</DL>
<HR>
<A NAME="push(java.lang.String)"><!-- --></A><H3>
push</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.200"><B>push</B></A>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;message)</PRE>
<DL>
<DD>Push new diagnostic context information for the current thread.
<p/>
<p>The contents of the <code>message</code> parameter is
determined solely by the client.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>message</CODE> - The new diagnostic context information.</DL>
</DD>
</DL>
<HR>
<A NAME="removeStack()"><!-- --></A><H3>
removeStack</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.226"><B>removeStack</B></A>()</PRE>
<DL>
<DD>Remove the diagnostic context for this thread.
<p/>
<p>Each thread that created a diagnostic context by calling
<A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#push(java.lang.String)"><CODE>push(java.lang.String)</CODE></A> should call this method before exiting. Otherwise,
the memory used by the <b>thread</b> cannot be reclaimed by the
VM.
<p/>
<p>As this is such an important problem in heavy duty systems and
because it is difficult to always guarantee that the remove
method is called before exiting a thread, this method has been
augmented to lazily remove references to dead threads. In
practice, this means that you can be a little sloppy and
occasionally forget to call <A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#remove(java.lang.String)"><CODE>remove(java.lang.String)</CODE></A> before exiting a
thread. However, you must call <code>remove</code> sometime. If
you never call it, then your application is sure to run out of
memory.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="setMaxDepth(int)"><!-- --></A><H3>
setMaxDepth</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/apache/logging/log4j/ThreadContext.html#line.258"><B>setMaxDepth</B></A>(int&nbsp;maxDepth)</PRE>
<DL>
<DD>Set maximum depth of this diagnostic context. If the current
depth is smaller or equal to <code>maxDepth</code>, then no
action is taken.
<p/>
<p>This method is a convenient alternative to multiple <A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#pop()"><CODE>pop()</CODE></A> calls. Moreover, it is often the case that at the end of
complex call sequences, the depth of the NDC is
unpredictable. The <code>setMaxDepth</code> method circumvents
this problem.
<p/>
<p>For example, the combination
<pre>
void foo() {
&nbsp; int depth = NDC.getDepth();
<p/>
&nbsp; ... complex sequence of calls
<p/>
&nbsp; NDC.setMaxDepth(depth);
}
</pre>
<p/>
ensures that between the entry and exit of foo the depth of the
diagnostic stack is conserved.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>maxDepth</CODE> - The maximum depth of the stack.<DT><B>See Also:</B><DD><A HREF="../../../../org/apache/logging/log4j/ThreadContext.html#getDepth()"><CODE>getDepth()</CODE></A></DL>
</DD>
</DL>
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