Metrics (Hive Common 1.2.1.spark2 API)

```
public class Metrics
extends Object
```
Metrics Subsystem - allows exposure of a number of named parameters/counters via jmx, intended to be used as a static subsystem Has a couple of primary ways it can be used: (i) Using the set and get methods to set and get named parameters (ii) Using the incrementCounter method to increment and set named parameters in one go, rather than having to make a get and then a set. (iii) Using the startScope and endScope methods to start and end named "scopes" that record the number of times they've been instantiated and amount of time(in milliseconds) spent inside the scopes.

Nested Classes
Modifier and Type	Class and Description
`static class`	`Metrics.MetricsScope` MetricsScope : A class that encapsulates an idea of a metered scope.

Methods
Modifier and Type	Method and Description
`static void`	`endScope(String name)`
`static Object`	`get(String name)`
`static Metrics.MetricsScope`	`getScope(String name)`
`static Long`	`incrementCounter(String name)`
`static Long`	`incrementCounter(String name, long increment)`
`static void`	`init()`
`static void`	`set(String name, Object value)`
`static Metrics.MetricsScope`	`startScope(String name)`

public static void init()
                 throws Exception

public static Long incrementCounter(String name)
                             throws IOException

public static Long incrementCounter(String name,
                    long increment)
                             throws IOException

public static void set(String name,
       Object value)
                throws IOException

public static Object get(String name)
                  throws IOException

public static Metrics.MetricsScope startScope(String name)
                                       throws IOException

public static Metrics.MetricsScope getScope(String name)
                                     throws IOException

public static void endScope(String name)
                     throws IOException

Class Metrics