abstractmemorymonitor.html

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<CODE>protected &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../mondrian/util/AbstractMemoryMonitor.html#notifyListeners(long, long)">notifyListeners</A></B>(long&nbsp;usedMemory,
                long&nbsp;maxMemory)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Notifies all <code>Listener</code>s that memory is running short.</TD>
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<CODE>protected &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../mondrian/util/AbstractMemoryMonitor.html#notifyNewLowThreshold(long)">notifyNewLowThreshold</A></B>(long&nbsp;newLowThreshold)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Derived classes implement this method if they wish to be notified
 when there is a new lowest threshold.</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../mondrian/util/AbstractMemoryMonitor.html#removeAllListener()">removeAllListener</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Clear out all <code>Listener</code>s and turnoff JVM
 memory notification.</TD>
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<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../mondrian/util/AbstractMemoryMonitor.html#removeListener(mondrian.util.MemoryMonitor.Listener)">removeListener</A></B>(<A HREF="../../mondrian/util/MemoryMonitor.Listener.html" title="interface in mondrian.util">MemoryMonitor.Listener</A>&nbsp;listener)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Removes a <code>Listener</code> from the <code>MemoryMonitor</code>.</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../mondrian/util/AbstractMemoryMonitor.html#resetFromTest()">resetFromTest</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This should only be called when one is switching from a
 test <code>MemoryMonitor</code> back to the default system
 <code>MemoryMonitor</code>.</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../mondrian/util/AbstractMemoryMonitor.html#updateListenerThreshold(mondrian.util.MemoryMonitor.Listener, int)">updateListenerThreshold</A></B>(<A HREF="../../mondrian/util/MemoryMonitor.Listener.html" title="interface in mondrian.util">MemoryMonitor.Listener</A>&nbsp;listener,
                        int&nbsp;percentage)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Changes the threshold percentage of a given <code>Listener</code>.</TD>
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<CODE>protected &nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../mondrian/util/AbstractMemoryMonitor.html#usagePercentage()">usagePercentage</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns how much memory is currently being used as a percentage.</TD>
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<TH ALIGN="left"><B>Methods inherited from interface mondrian.util.<A HREF="../../mondrian/util/MemoryMonitor.html" title="interface in mondrian.util">MemoryMonitor</A></B></TH>
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<TD><CODE><A HREF="../../mondrian/util/MemoryMonitor.html#getMaxMemory()">getMaxMemory</A>, <A HREF="../../mondrian/util/MemoryMonitor.html#getUsedMemory()">getUsedMemory</A></CODE></TD>
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<A NAME="AbstractMemoryMonitor()"><!-- --></A><H3>
AbstractMemoryMonitor</H3>
<PRE>
protected <B>AbstractMemoryMonitor</B>()</PRE>
<DL>
<DD>Constructor of this base class.
<P>
</DL>

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<A NAME="getLogger()"><!-- --></A><H3>
getLogger</H3>
<PRE>
protected abstract org.apache.log4j.Logger <B>getLogger</B>()</PRE>
<DL>
<DD>Returns the <code>Logger</code>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the <code>Logger</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="getLowThreshold()"><!-- --></A><H3>
getLowThreshold</H3>
<PRE>
protected long <B>getLowThreshold</B>()</PRE>
<DL>
<DD>Returns the current lowest threshold of all registered
 <code>Listener</code>s.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the lowest threshold.</DL>
</DD>
</DL>
<HR>

<A NAME="getDefaultThresholdPercentage()"><!-- --></A><H3>
getDefaultThresholdPercentage</H3>
<PRE>
public int <B>getDefaultThresholdPercentage</B>()</PRE>
<DL>
<DD>Returns the default memory notification percentage.

 <p>This is the value of the Mondrian
 <A HREF="../../mondrian/olap/MondrianProperties.html#MemoryMonitorThreshold"><CODE>MondrianProperties.MemoryMonitorThreshold</CODE></A> property.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the default threshold percentage.</DL>
</DD>
</DL>
<HR>

<A NAME="addListener(mondrian.util.MemoryMonitor.Listener)"><!-- --></A><H3>
addListener</H3>
<PRE>
public boolean <B>addListener</B>(<A HREF="../../mondrian/util/MemoryMonitor.Listener.html" title="interface in mondrian.util">MemoryMonitor.Listener</A>&nbsp;listener)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../mondrian/util/MemoryMonitor.html#addListener(mondrian.util.MemoryMonitor.Listener)">MemoryMonitor</A></CODE></B></DD>
<DD>Adds a <code>Listener</code> using the default threshold percentage.

 <p>If the threshold is below the Java5 memory managment system's
 threshold, then the Listener is notified from within this
 method.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../mondrian/util/MemoryMonitor.html#addListener(mondrian.util.MemoryMonitor.Listener)">addListener</A></CODE> in interface <CODE><A HREF="../../mondrian/util/MemoryMonitor.html" title="interface in mondrian.util">MemoryMonitor</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>listener</CODE> - the <code>Listener</code> to be added.
<DT><B>Returns:</B><DD><code>true</code> if the <code>Listener</code> was
 added and <code>false</code> otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="addListener(mondrian.util.MemoryMonitor.Listener, int)"><!-- --></A><H3>
addListener</H3>
<PRE>
public boolean <B>addListener</B>(<A HREF="../../mondrian/util/MemoryMonitor.Listener.html" title="interface in mondrian.util">MemoryMonitor.Listener</A>&nbsp;listener,
                           int&nbsp;percentage)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../mondrian/util/MemoryMonitor.html#addListener(mondrian.util.MemoryMonitor.Listener, int)">MemoryMonitor</A></CODE></B></DD>
<DD>Adds a <code>Listener</code> to the <code>MemoryMonitor</code> with
 a given threshold percentage.

 <p>If the threshold is below the Java5 memory managment system's
 threshold, then the Listener is notified from within this
 method.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../mondrian/util/MemoryMonitor.html#addListener(mondrian.util.MemoryMonitor.Listener, int)">addListener</A></CODE> in interface <CODE><A HREF="../../mondrian/util/MemoryMonitor.html" title="interface in mondrian.util">MemoryMonitor</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>listener</CODE> - the <code>Listener</code> to be added.<DD><CODE>percentage</CODE> - the threshold percentage for this
   <code>Listener</code>.
<DT><B>Returns:</B><DD><code>true</code> if the <code>Listener</code> was
   added and <code>false</code> otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="updateListenerThreshold(mondrian.util.MemoryMonitor.Listener, int)"><!-- --></A><H3>
updateListenerThreshold</H3>
<PRE>
public void <B>updateListenerThreshold</B>(<A HREF="../../mondrian/util/MemoryMonitor.Listener.html" title="interface in mondrian.util">MemoryMonitor.Listener</A>&nbsp;listener,
                                    int&nbsp;percentage)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../mondrian/util/MemoryMonitor.html#updateListenerThreshold(mondrian.util.MemoryMonitor.Listener, int)">MemoryMonitor</A></CODE></B></DD>
<DD>Changes the threshold percentage of a given <code>Listener</code>.

 <p>If the new value is below the system's current value, then the
 <code>Listener</code> will have its notification callback called
 while in this method - so a client should always check if its
 notification method was called immediately after calling this
 method.

 <p>This method can be used if, for example, an algorithm has
 different approaches that result in different memory
 usage profiles; one, large memory but fast and
 a second which is low-memory but slow. The algorithm starts
 with the large memory approach, receives a low memory
 notification, switches to the low memory approach and changes
 when it should be notified for this new approach. The first
 approach need to be notified at a lower percentage because it
 uses lots of memory, possibly quickly; while the second