WorkflowLock (temporal-sdk 1.27.1 API)

```
public interface WorkflowLock
```
Workflow lock is an alternative to Lock that is deterministic and compatible with Temporal's concurrency model. API is designed to be used in a workflow code only. It is not allowed to be used in an activity code.
In Temporal concurrency model, only one thread in a workflow code can execute at a time.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`isHeld()`	Checks if a lock is held.
`void`	`lock()`	Acquires the lock.
`boolean`	`tryLock()`	Acquires the lock only if it is free at the time of invocation.
`boolean`	`tryLock(java.time.Duration timeout)`	Acquires the lock if it is free within the given waiting time.
`void`	`unlock()`	Releases the lock.

- Method Detail
  - lock
```
void lock()
```
    Acquires the lock.
    
    Throws:
    
    CanceledFailure - if thread (or current CancellationScope was canceled).
  - tryLock
```
boolean tryLock()
```
    Acquires the lock only if it is free at the time of invocation.
    
    Returns:
    
    true if the lock was acquired and false otherwise
  - tryLock
```
boolean tryLock(java.time.Duration timeout)
```
    Acquires the lock if it is free within the given waiting time.
    
    Returns:
    
    true if the lock was acquired and false if the waiting time elapsed before the lock was acquired.
    
    Throws:
    
    CanceledFailure - if thread (or current CancellationScope was canceled).
  - unlock
```
void unlock()
```
    Releases the lock.
  - isHeld
```
boolean isHeld()
```
    Checks if a lock is held.
    
    Returns:
    
    true if the lock is held and false otherwise.