SequentialExecutionQueue (Jenkins core 2.380 API)

java.lang.Object
- hudson.util.SequentialExecutionQueue

All Implemented Interfaces:

Executor
```
public class SequentialExecutionQueue
extends Object
implements Executor
```
Executor that collapses two equal Runnables into one, and makes sure no two equal Runnables get executed simultaneously.
That is, if a Runnable is executing and another one gets submitted, the 2nd one waits for the completion of the 1st one. Object.equals(Object) is used on Runnable to identify two equal Runnables.

Author:

Kohsuke Kawaguchi

Constructor Summary

Constructors
Constructor Description

SequentialExecutionQueue(ExecutorService executors)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`execute(Runnable item)`
`ExecutorService`	`getExecutors()`	Gets the base underlying executors.,
`Set<Runnable>`	`getInProgress()`	Gets `Runnable`s that are currently executed by a live thread.
`boolean`	`isStarving(long threshold)`	Returns true if too much time is spent since some `Runnable` is submitted into the queue until they get executed.
`void`	`setExecutors(ExecutorService svc)`	Starts using a new `ExecutorService` to carry out executions.

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

- Constructor Detail
  - SequentialExecutionQueue
```
public SequentialExecutionQueue(ExecutorService executors)
```
- Method Detail
  - getExecutors
```
public ExecutorService getExecutors()
```
    Gets the base underlying executors.,
  - setExecutors
```
public void setExecutors(ExecutorService svc)
```
    Starts using a new ExecutorService to carry out executions.
    The older ExecutorService will be shut down (but it's still expected to complete whatever they are doing and scheduled.)
  - execute
```
public void execute(@NonNull
                    Runnable item)
```
    Specified by:
    
    execute in interface Executor
  - isStarving
```
public boolean isStarving(long threshold)
```
    Returns true if too much time is spent since some Runnable is submitted into the queue until they get executed.
  - getInProgress
```
public Set<Runnable> getInProgress()
```
    Gets Runnables that are currently executed by a live thread.