Package org.jgroups.blocks.atomic
Class CounterService
- java.lang.Object
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- org.jgroups.blocks.atomic.CounterService
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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
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Field Summary
Fields Modifier and Type Field Description protected JChannel
ch
protected COUNTER
counter_prot
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Constructor Summary
Constructors Constructor Description CounterService(JChannel ch)
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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 existsjava.lang.String
printCounters()
void
setChannel(JChannel ch)
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Constructor Detail
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CounterService
public CounterService(JChannel ch)
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Method Detail
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setChannel
public void setChannel(JChannel ch)
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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 namesinitial_value
- The initial value of a new counter if there is no existing counter. Ignored if the counter already exists- Returns:
- The counter implementation
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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
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printCounters
public java.lang.String printCounters()
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dumpPendingRequests
public java.lang.String dumpPendingRequests()
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