CounterService

java.lang.Object
- org.jgroups.blocks.atomic.CounterService

```
public class CounterService
extends java.lang.Object
```
Provides a distributed counter (similar to AtomicLong) which can be atomically updated across a cluster.

Since:

3.0.0

Author:

Bela Ban

Field Summary

Fields
Modifier and Type Field Description

protected JChannel ch

protected COUNTER counter_prot

Constructor Summary

Constructors
Constructor Description

CounterService(JChannel ch)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`deleteCounter(java.lang.String name)`	Deletes a counter instance (on the coordinator)
`java.lang.String`	`dumpPendingRequests()`
`Counter`	`getOrCreateCounter(java.lang.String name, long initial_value)`	Returns an existing counter, or creates a new one if none exists
`java.lang.String`	`printCounters()`
`void`	`setChannel(JChannel ch)`

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

- Field Detail
  - ch
```
protected JChannel ch
```
  - counter_prot
```
protected COUNTER counter_prot
```
- Constructor Detail
  - CounterService
```
public CounterService(JChannel ch)
```
- Method Detail
  - setChannel
```
public void setChannel(JChannel ch)
```
  - getOrCreateCounter
```
public Counter getOrCreateCounter(java.lang.String name,
                                  long initial_value)
```
    Returns an existing counter, or creates a new one if none exists
    
    Parameters:
    
    name - Name of the counter, different counters have to have different names
    
    initial_value - The initial value of a new counter if there is no existing counter. Ignored if the counter already exists
    
    Returns:
    
    The counter implementation
  - deleteCounter
```
public void deleteCounter(java.lang.String name)
```
    Deletes a counter instance (on the coordinator)
    
    Parameters:
    
    name - The name of the counter. No-op if the counter doesn't exist
  - printCounters
```
public java.lang.String printCounters()
```
  - dumpPendingRequests
```
public java.lang.String dumpPendingRequests()
```