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7Uses of Interface org.apache.hadoop.metrics.MetricsContext (Hadoop 0.20.1 API)
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83<H2>
84<B>Uses of Interface<br>org.apache.hadoop.metrics.MetricsContext</B></H2>
85</CENTER>
86
87<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
88<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
89<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
90Packages that use <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></FONT></TH>
91</TR>
92<TR BGCOLOR="white" CLASS="TableRowColor">
93<TD><A HREF="#org.apache.hadoop.ipc.metrics"><B>org.apache.hadoop.ipc.metrics</B></A></TD>
94<TD>&nbsp;&nbsp;</TD>
95</TR>
96<TR BGCOLOR="white" CLASS="TableRowColor">
97<TD><A HREF="#org.apache.hadoop.metrics"><B>org.apache.hadoop.metrics</B></A></TD>
98<TD>This package defines an API for reporting performance metric information.&nbsp;</TD>
99</TR>
100<TR BGCOLOR="white" CLASS="TableRowColor">
101<TD><A HREF="#org.apache.hadoop.metrics.file"><B>org.apache.hadoop.metrics.file</B></A></TD>
102<TD>Implementation of the metrics package that writes the metrics to a file.&nbsp;</TD>
103</TR>
104<TR BGCOLOR="white" CLASS="TableRowColor">
105<TD><A HREF="#org.apache.hadoop.metrics.ganglia"><B>org.apache.hadoop.metrics.ganglia</B></A></TD>
106<TD>Implementation of the metrics package that sends metric data to
107<a href="http://ganglia.sourceforge.net/">Ganglia</a>.&nbsp;</TD>
108</TR>
109<TR BGCOLOR="white" CLASS="TableRowColor">
110<TD><A HREF="#org.apache.hadoop.metrics.jvm"><B>org.apache.hadoop.metrics.jvm</B></A></TD>
111<TD>&nbsp;&nbsp;</TD>
112</TR>
113<TR BGCOLOR="white" CLASS="TableRowColor">
114<TD><A HREF="#org.apache.hadoop.metrics.spi"><B>org.apache.hadoop.metrics.spi</B></A></TD>
115<TD>The Service Provider Interface for the Metrics API.&nbsp;</TD>
116</TR>
117</TABLE>
118&nbsp;
119<P>
120<A NAME="org.apache.hadoop.ipc.metrics"><!-- --></A>
121<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
122<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
123<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
124Uses of <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A> in <A HREF="../../../../../org/apache/hadoop/ipc/metrics/package-summary.html">org.apache.hadoop.ipc.metrics</A></FONT></TH>
125</TR>
126</TABLE>
127&nbsp;
128<P>
129
130<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
131<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
132<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/ipc/metrics/package-summary.html">org.apache.hadoop.ipc.metrics</A> with parameters of type <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></FONT></TH>
133</TR>
134<TR BGCOLOR="white" CLASS="TableRowColor">
135<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
136<CODE>&nbsp;void</CODE></FONT></TD>
137<TD><CODE><B>RpcMetrics.</B><B><A HREF="../../../../../org/apache/hadoop/ipc/metrics/RpcMetrics.html#doUpdates(org.apache.hadoop.metrics.MetricsContext)">doUpdates</A></B>(<A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A>&nbsp;context)</CODE>
138
139<BR>
140&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Push the metrics to the monitoring subsystem on doUpdate() call.</TD>
141</TR>
142</TABLE>
143&nbsp;
144<P>
145<A NAME="org.apache.hadoop.metrics"><!-- --></A>
146<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
147<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
148<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
149Uses of <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A> in <A HREF="../../../../../org/apache/hadoop/metrics/package-summary.html">org.apache.hadoop.metrics</A></FONT></TH>
150</TR>
151</TABLE>
152&nbsp;
153<P>
154
155<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
156<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
157<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/metrics/package-summary.html">org.apache.hadoop.metrics</A> that return <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></FONT></TH>
158</TR>
159<TR BGCOLOR="white" CLASS="TableRowColor">
160<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
161<CODE>static&nbsp;<A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></CODE></FONT></TD>
162<TD><CODE><B>MetricsUtil.</B><B><A HREF="../../../../../org/apache/hadoop/metrics/MetricsUtil.html#getContext(java.lang.String)">getContext</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;contextName)</CODE>
163
164<BR>
165&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
166</TR>
167<TR BGCOLOR="white" CLASS="TableRowColor">
168<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
169<CODE>&nbsp;<A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></CODE></FONT></TD>
170<TD><CODE><B>ContextFactory.</B><B><A HREF="../../../../../org/apache/hadoop/metrics/ContextFactory.html#getContext(java.lang.String)">getContext</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;contextName)</CODE>
171
172<BR>
173&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
174</TR>
175<TR BGCOLOR="white" CLASS="TableRowColor">
176<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
177<CODE>static&nbsp;<A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></CODE></FONT></TD>
178<TD><CODE><B>MetricsUtil.</B><B><A HREF="../../../../../org/apache/hadoop/metrics/MetricsUtil.html#getContext(java.lang.String, java.lang.String)">getContext</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;refName,
179           <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;contextName)</CODE>
180
181<BR>
182&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Utility method to return the named context.</TD>
183</TR>
184<TR BGCOLOR="white" CLASS="TableRowColor">
185<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
186<CODE>&nbsp;<A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></CODE></FONT></TD>
187<TD><CODE><B>ContextFactory.</B><B><A HREF="../../../../../org/apache/hadoop/metrics/ContextFactory.html#getContext(java.lang.String, java.lang.String)">getContext</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;refName,
188           <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;contextName)</CODE>
189
190<BR>
191&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the named MetricsContext instance, constructing it if necessary
192 using the factory's current configuration attributes.</TD>
193</TR>
194<TR BGCOLOR="white" CLASS="TableRowColor">
195<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
196<CODE>static&nbsp;<A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></CODE></FONT></TD>
197<TD><CODE><B>ContextFactory.</B><B><A HREF="../../../../../org/apache/hadoop/metrics/ContextFactory.html#getNullContext(java.lang.String)">getNullContext</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;contextName)</CODE>
198
199<BR>
200&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns a "null" context - one which does nothing.</TD>
201</TR>
202</TABLE>
203&nbsp;
204<P>
205
206<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
207<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
208<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/metrics/package-summary.html">org.apache.hadoop.metrics</A> with parameters of type <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></FONT></TH>
209</TR>
210<TR BGCOLOR="white" CLASS="TableRowColor">
211<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
212<CODE>static&nbsp;<A HREF="../../../../../org/apache/hadoop/metrics/MetricsRecord.html" title="interface in org.apache.hadoop.metrics">MetricsRecord</A></CODE></FONT></TD>
213<TD><CODE><B>MetricsUtil.</B><B><A HREF="../../../../../org/apache/hadoop/metrics/MetricsUtil.html#createRecord(org.apache.hadoop.metrics.MetricsContext, java.lang.String)">createRecord</A></B>(<A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A>&nbsp;context,
214             <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;recordName)</CODE>
215
216<BR>
217&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Utility method to create and return new metrics record instance within the
218 given context.</TD>
219</TR>
220<TR BGCOLOR="white" CLASS="TableRowColor">
221<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
222<CODE>&nbsp;void</CODE></FONT></TD>
223<TD><CODE><B>Updater.</B><B><A HREF="../../../../../org/apache/hadoop/metrics/Updater.html#doUpdates(org.apache.hadoop.metrics.MetricsContext)">doUpdates</A></B>(<A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A>&nbsp;context)</CODE>
224
225<BR>
226&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Timer-based call-back from the metric library.</TD>
227</TR>
228</TABLE>
229&nbsp;
230<P>
231<A NAME="org.apache.hadoop.metrics.file"><!-- --></A>
232<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
233<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
234<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
235Uses of <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A> in <A HREF="../../../../../org/apache/hadoop/metrics/file/package-summary.html">org.apache.hadoop.metrics.file</A></FONT></TH>
236</TR>
237</TABLE>
238&nbsp;
239<P>
240
241<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
242<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
243<TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/metrics/file/package-summary.html">org.apache.hadoop.metrics.file</A> that implement <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></FONT></TH>
244</TR>
245<TR BGCOLOR="white" CLASS="TableRowColor">
246<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
247<CODE>&nbsp;class</CODE></FONT></TD>
248<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/metrics/file/FileContext.html" title="class in org.apache.hadoop.metrics.file">FileContext</A></B></CODE>
249
250<BR>
251&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Metrics context for writing metrics to a file.<p/>
252
253 This class is configured by setting ContextFactory attributes which in turn
254 are usually configured through a properties file.</TD>
255</TR>
256</TABLE>
257&nbsp;
258<P>
259<A NAME="org.apache.hadoop.metrics.ganglia"><!-- --></A>
260<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
261<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
262<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
263Uses of <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A> in <A HREF="../../../../../org/apache/hadoop/metrics/ganglia/package-summary.html">org.apache.hadoop.metrics.ganglia</A></FONT></TH>
264</TR>
265</TABLE>
266&nbsp;
267<P>
268
269<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
270<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
271<TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/metrics/ganglia/package-summary.html">org.apache.hadoop.metrics.ganglia</A> that implement <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></FONT></TH>
272</TR>
273<TR BGCOLOR="white" CLASS="TableRowColor">
274<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
275<CODE>&nbsp;class</CODE></FONT></TD>
276<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/metrics/ganglia/GangliaContext.html" title="class in org.apache.hadoop.metrics.ganglia">GangliaContext</A></B></CODE>
277
278<BR>
279&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Context for sending metrics to Ganglia.</TD>
280</TR>
281</TABLE>
282&nbsp;
283<P>
284<A NAME="org.apache.hadoop.metrics.jvm"><!-- --></A>
285<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
286<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
287<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
288Uses of <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A> in <A HREF="../../../../../org/apache/hadoop/metrics/jvm/package-summary.html">org.apache.hadoop.metrics.jvm</A></FONT></TH>
289</TR>
290</TABLE>
291&nbsp;
292<P>
293
294<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
295<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
296<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/metrics/jvm/package-summary.html">org.apache.hadoop.metrics.jvm</A> with parameters of type <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></FONT></TH>
297</TR>
298<TR BGCOLOR="white" CLASS="TableRowColor">
299<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
300<CODE>&nbsp;void</CODE></FONT></TD>
301<TD><CODE><B>JvmMetrics.</B><B><A HREF="../../../../../org/apache/hadoop/metrics/jvm/JvmMetrics.html#doUpdates(org.apache.hadoop.metrics.MetricsContext)">doUpdates</A></B>(<A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A>&nbsp;context)</CODE>
302
303<BR>
304&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This will be called periodically (with the period being configuration
305 dependent).</TD>
306</TR>
307</TABLE>
308&nbsp;
309<P>
310<A NAME="org.apache.hadoop.metrics.spi"><!-- --></A>
311<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
312<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
313<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
314Uses of <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A> in <A HREF="../../../../../org/apache/hadoop/metrics/spi/package-summary.html">org.apache.hadoop.metrics.spi</A></FONT></TH>
315</TR>
316</TABLE>
317&nbsp;
318<P>
319
320<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
321<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
322<TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/metrics/spi/package-summary.html">org.apache.hadoop.metrics.spi</A> that implement <A HREF="../../../../../org/apache/hadoop/metrics/MetricsContext.html" title="interface in org.apache.hadoop.metrics">MetricsContext</A></FONT></TH>
323</TR>
324<TR BGCOLOR="white" CLASS="TableRowColor">
325<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
326<CODE>&nbsp;class</CODE></FONT></TD>
327<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/metrics/spi/AbstractMetricsContext.html" title="class in org.apache.hadoop.metrics.spi">AbstractMetricsContext</A></B></CODE>
328
329<BR>
330&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The main class of the Service Provider Interface.</TD>
331</TR>
332<TR BGCOLOR="white" CLASS="TableRowColor">
333<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
334<CODE>&nbsp;class</CODE></FONT></TD>
335<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/metrics/spi/CompositeContext.html" title="class in org.apache.hadoop.metrics.spi">CompositeContext</A></B></CODE>
336
337<BR>
338&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
339</TR>
340<TR BGCOLOR="white" CLASS="TableRowColor">
341<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
342<CODE>&nbsp;class</CODE></FONT></TD>
343<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/metrics/spi/NullContext.html" title="class in org.apache.hadoop.metrics.spi">NullContext</A></B></CODE>
344
345<BR>
346&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Null metrics context: a metrics context which does nothing.</TD>
347</TR>
348<TR BGCOLOR="white" CLASS="TableRowColor">
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354&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A null context which has a thread calling
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