CondVar

java.lang.Object
- org.jgroups.util.CondVar

```
public class CondVar
extends java.lang.Object
```
A condition variable with methods for (timed) waiting and signalling

Since:

3.6

Author:

Bela Ban

Field Summary

Fields
Modifier and Type Field Description

protected java.util.concurrent.locks.Condition cond

protected java.util.concurrent.locks.Lock lock

Constructor Summary

Constructors
Constructor Description

CondVar()

CondVar(java.util.concurrent.locks.Lock lock)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`signal(boolean signal_all)`	Wakes up one (signal_all=false) or all (signal_all=true) blocked threads.
`void`	`waitFor(Condition condition)`	Blocks until condition is true.
`boolean`	`waitFor(Condition condition, long timeout, java.util.concurrent.TimeUnit unit)`	Blocks until condition is true or the time elapsed

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

- Field Detail
  - lock
```
protected final java.util.concurrent.locks.Lock lock
```
  - cond
```
protected final java.util.concurrent.locks.Condition cond
```
- Constructor Detail
  - CondVar
```
public CondVar()
```
  - CondVar
```
public CondVar(java.util.concurrent.locks.Lock lock)
```
- Method Detail
  - waitFor
```
public void waitFor(Condition condition)
```
    Blocks until condition is true.
    
    Parameters:
    
    condition - The condition. Must be non-null
  - waitFor
```
public boolean waitFor(Condition condition,
                       long timeout,
                       java.util.concurrent.TimeUnit unit)
```
    Blocks until condition is true or the time elapsed
    
    Parameters:
    
    condition - The condition
    
    timeout - The timeout to wait. A value <= 0 causes immediate return
    
    unit - TimeUnit
    
    Returns:
    
    The condition's status
  - signal
```
public void signal(boolean signal_all)
```
    Wakes up one (signal_all=false) or all (signal_all=true) blocked threads. Usually called when the condition changed to true.
    
    Parameters:
    
    signal_all -