org.apache.hadoop.metrics.spi
Class NoEmitMetricsContext
java.lang.Object
org.apache.hadoop.metrics.spi.AbstractMetricsContext
org.apache.hadoop.metrics.spi.NoEmitMetricsContext
- All Implemented Interfaces:
- MetricsContext
public class NoEmitMetricsContext
- extends AbstractMetricsContext
A MetricsContext that does not emit data, but, unlike NullContextWithUpdate,
does save it for retrieval with getAllRecords().
This is useful if you want to support MetricsServlet
, but
not emit metrics in any other way.
Methods inherited from class org.apache.hadoop.metrics.spi.AbstractMetricsContext |
close, createRecord, flush, getAllRecords, getAttribute, getAttributeTable, getContextFactory, getContextName, getPeriod, isMonitoring, newRecord, parseAndSetPeriod, registerUpdater, remove, setPeriod, startMonitoring, stopMonitoring, unregisterUpdater, update |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
NoEmitMetricsContext
public NoEmitMetricsContext()
- Creates a new instance of NullContextWithUpdateThread
init
public void init(String contextName,
ContextFactory factory)
- Description copied from class:
AbstractMetricsContext
- Initializes the context.
- Specified by:
init
in interface MetricsContext
- Overrides:
init
in class AbstractMetricsContext
- Parameters:
contextName
- The given name for this contextfactory
- The creator of this context
emitRecord
protected void emitRecord(String contextName,
String recordName,
OutputRecord outRec)
- Do-nothing version of emitRecord
- Specified by:
emitRecord
in class AbstractMetricsContext
Copyright © 2009 The Apache Software Foundation