MetricsUtil (MapR Core Java API)

java.lang.Object
- com.mapr.org.apache.hadoop.metrics.MetricsUtil

```
@LimitedPrivate({"HDFS","MapReduce"})
@Evolving
public class MetricsUtil
extends java.lang.Object
```
Utility class to simplify creation and reporting of hadoop metrics. For examples of usage, see NameNodeMetrics.

See Also:

MetricsRecord, MetricsContext, ContextFactory

Field Summary

Fields
Modifier and Type Field Description

static org.slf4j.Logger LOG

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static MetricsRecord`	`createRecord(MetricsContext context, java.lang.String recordName)`	Utility method to create and return new metrics record instance within the given context.
`static MetricsContext`	`getContext(java.lang.String contextName)`
`static MetricsContext`	`getContext(java.lang.String refName, java.lang.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

- Field Detail
  - LOG
```
public static final org.slf4j.Logger LOG
```
- Method Detail
  - getContext
```
public static MetricsContext getContext(java.lang.String contextName)
```
  - getContext
```
public static MetricsContext getContext(java.lang.String refName,
                                        java.lang.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,
                                         java.lang.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