Counter (Apache HBase 1.2.12 API)

java.lang.Object
- org.apache.hadoop.hbase.util.Counter

@InterfaceAudience.Public
@InterfaceStability.Evolving
public class Counter
extends Object

High scalable counter. Thread safe.

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

private static class Counter.Cell

private static class Counter.Container

private static class Counter.IndexHolder

Nested Classes
Modifier and Type	Class and Description
`private static class`	`Counter.Cell`
`private static class`	`Counter.Container`
`private static class`	`Counter.IndexHolder`

Field Summary

Fields
Modifier and Type	Field and Description
`private AtomicReference<Counter.Container>`	`containerRef`
`private ThreadLocal<Counter.IndexHolder>`	`indexHolderThreadLocal`
`private static int`	`MAX_CELLS_LENGTH`

Constructor Summary

Constructors
Modifier Constructor and Description

Counter()

private Counter(Counter.Cell initCell)

Counter(long initValue)

Constructors
Modifier	Constructor and Description
	`Counter()`
`private`	`Counter(Counter.Cell initCell)`
	`Counter(long initValue)`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`add(long delta)`
`void`	`decrement()`
`long`	`get()`
`private static int`	`hash()`
`void`	`increment()`
`void`	`set(long value)`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

MAX_CELLS_LENGTH
```
private static final int MAX_CELLS_LENGTH
```
See Also:
Constant Field Values

containerRef

private final AtomicReference<Counter.Container> containerRef

indexHolderThreadLocal

private final ThreadLocal<Counter.IndexHolder> indexHolderThreadLocal

Constructor Detail

Counter
```
public Counter()
```

Counter
```
public Counter(long initValue)
```

Counter

private Counter(Counter.Cell initCell)

Method Detail

hash
```
private static int hash()
```

add
```
public void add(long delta)
```

increment
```
public void increment()
```

decrement
```
public void decrement()
```

set
```
public void set(long value)
```

get
```
public long get()
```

toString
```
public String toString()
```
Overrides:

toString in class Object

Class Counter

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MAX_CELLS_LENGTH

containerRef

indexHolderThreadLocal

Constructor Detail

Counter

Counter

Counter

Method Detail

hash

add

increment

decrement

set

get

toString