org.apache.hadoop.metrics
Class MetricsUtil

java.lang.Object
  org.apache.hadoop.metrics.MetricsUtil

public class MetricsUtil
extends Object

Utility class to simplify creation and reporting of hadoop metrics. For examples of usage, see DataNode.

See Also:

MetricsRecord, MetricsContext, ContextFactory

Method Summary

static MetricsRecord	createRecord(MetricsContext context, String recordName) Utility method to create and return new metrics record instance within the given context.
static MetricsContext	getContext(String contextName) Utility method to return the named context.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getContext

public static MetricsContext getContext(String contextName)

Utility method to return the named context. If the desired context cannot be created for any reason, the exception is logged, and a null context is returned.

createRecord

public static MetricsRecord createRecord(MetricsContext context,
                                         String recordName)

Utility method to create and return new metrics record instance within the given context. This record is tagged with the host name.

Parameters:

context - the context

recordName - name of the record

Returns:

newly created metrics record