Queue (Jenkins core 2.228 API)

java.lang.Object
- hudson.model.ResourceController
- - hudson.model.Queue

All Implemented Interfaces:

Saveable
```
@ExportedBean
public class Queue
extends ResourceController
implements Saveable
```
Build queue.
This class implements the core scheduling logic. Queue.Task represents the executable task that are placed in the queue. While in the queue, it's wrapped into Item so that we can keep track of additional data used for deciding what to execute when.
Items in queue goes through several stages, as depicted below:
```
 (enter) --> waitingList --+--> blockedProjects
                           |        ^
                           |        |
                           |        v
                           +--> buildables ---> pending ---> left
                                    ^              |
                                    |              |
                                    +---(rarely)---+
 
```
Note: In the normal case of events pending items only move to left. However they can move back if the node they are assigned to execute on disappears before their Executor thread starts, where the node is removed before the Queue.Executable has been instantiated it is safe to move the pending item back to buildable. Once the Queue.Executable has been instantiated the only option is to let the Queue.Executable bomb out as soon as it starts to try an execute on the node that no longer exists.
In addition, at any stage, an item can be removed from the queue (for example, when the user cancels a job in the queue.) See the corresponding field for their exact meanings.
Author:

Kohsuke Kawaguchi

See Also:

QueueListener, QueueTaskDispatcher

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`class`	`Queue.BlockedItem` `Item` in the `blockedProjects` stage.
`static class`	`Queue.BuildableItem` `Item` in the `buildables` stage.
`static interface`	`Queue.Executable` Represents the real meat of the computation run by `Executor`.
`static interface`	`Queue.FlyweightTask` Marks `Queue.Task`s that do not consume `Executor`.
`static class`	`Queue.Item` Item in a queue.
`static class`	`Queue.JobOffer` Data structure created for each idle `Executor`.
`static class`	`Queue.LeftItem` `Item` in the `leftItems` stage.
`static interface`	`Queue.NonBlockingTask` Marks `Queue.Task`s that are not affected by the Jenkins.isQuietingDown() quieting down}, because these tasks keep other tasks executing.
`static class`	`Queue.NotWaitingItem` Common part between `Queue.BlockedItem` and `BuildableItem`.
`static interface`	`Queue.QueueAction` An optional interface for actions on Queue.Item.
`static class`	`Queue.QueueDecisionHandler` Extension point for deciding if particular job should be scheduled or not.
`static class`	`Queue.Saver` Schedule `save()` call for near future once items change.
`class`	`Queue.StubItem` A Stub class for `Item` which exposes only the name of the Task to be displayed when the user has DISCOVERY permissions only.
`static class`	`Queue.StubTask` A Stub class for `Queue.Task` which exposes only the name of the Task to be displayed when the user has DISCOVERY permissions only.
`static interface`	`Queue.Task` Task whose execution is controlled by the queue.
`static interface`	`Queue.TransientTask` Marks `Queue.Task`s that are not persisted.
`static class`	`Queue.WaitingItem` `Item` in the `waitingList` stage.

Field Summary

Fields
Modifier and Type Field and Description

static com.thoughtworks.xstream.XStream XSTREAM
This XStream instance is used to persist Queue.Tasks.
- Fields inherited from interface hudson.model.Saveable
  NOOP

Fields
Modifier and Type	Field and Description
`static com.thoughtworks.xstream.XStream`	`XSTREAM` This `XStream` instance is used to persist `Queue.Task`s.

Constructor Summary

Constructors
Constructor and Description

Queue(LoadBalancer loadBalancer)

Constructors
Constructor and Description
`Queue(LoadBalancer loadBalancer)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`protected void`	`_await()`
`protected void`	`_signalAll()`
`protected boolean`	`_tryWithLock(Runnable runnable)` Invokes the supplied `Runnable` if the `Queue` lock was obtained without blocking.
`protected <V> V`	`_withLock(Callable<V> callable)` Some operations require to be performed with the `Queue` lock held.
`protected <V,T extends Throwable> V`	`_withLock(hudson.remoting.Callable<V,T> callable)` Some operations require to be performed with the `Queue` lock held.
`protected void`	`_withLock(Runnable runnable)` Some operations require to be performed with the `Queue` lock held.
`boolean`	`add(AbstractProject p)` Deprecated. as of 1.311 Use `schedule(AbstractProject)`
`boolean`	`add(AbstractProject p, int quietPeriod)` Deprecated. as of 1.311 Use `schedule(Task, int)`
`boolean`	`add(Queue.Task p, int quietPeriod)` Deprecated. as of 1.311 Use `schedule(Task, int)`
`boolean`	`add(Queue.Task p, int quietPeriod, Action... actions)` Deprecated. as of 1.311 Use `schedule(Task, int, Action...)`
`boolean`	`cancel(Queue.Item item)`
`boolean`	`cancel(Queue.Task p)` Cancels the item in the queue.
`void`	`clear()` Wipes out all the items currently in the queue, as if all of them are cancelled at once.
`void`	`clearLeftItems()` Immediately clear the `getLeftItems()` cache.
`boolean`	`contains(Queue.Task t)` Returns true if this queue contains the said project.
`int`	`countBuildableItems()` Counts all the `BuildableItem`s currently in the queue.
`int`	`countBuildableItemsFor(Label l)` How many `BuildableItem`s are assigned for the given label?
`org.kohsuke.stapler.HttpResponse`	`doCancelItem(long id)` Called from `queue.jelly` and `queue-items.jelly`.
`Api`	`getApi()`
`List<Queue.Item>`	`getApproximateItemsQuickly()` Deprecated. Use `getItems()` directly. As of 1.607 the approximation is no longer needed.
`protected List<Queue.BlockedItem>`	`getBlockedItems()` Gets the snapshot of all `Queue.BlockedItem`s.
`List<Queue.BuildableItem>`	`getBuildableItems()` Gets the snapshot of all `BuildableItem`s.
`List<Queue.BuildableItem>`	`getBuildableItems(Computer c)` Gets all the `BuildableItem`s that are waiting for an executor in the given `Computer`.
`Queue.StubItem[]`	`getDiscoverableItems()` Returns an array of Item for which it is only visible the name of the task.
`static Queue`	`getInstance()`
`Queue.Item`	`getItem(long id)`
`Queue.Item`	`getItem(Queue.Task t)` Gets the information about the queue item for the given project.
`Queue.Item[]`	`getItems()` Gets a snapshot of items in the queue.
`List<Queue.Item>`	`getItems(Queue.Task t)` Gets the information about the queue item for the given project.
`Collection<Queue.LeftItem>`	`getLeftItems()` Returns the snapshot of all `Queue.LeftItem`s.
`LoadBalancer`	`getLoadBalancer()`
`List<Queue.BuildableItem>`	`getPendingItems()` Gets the snapshot of all `BuildableItem`s.
`QueueSorter`	`getSorter()`
`List<Queue.Item>`	`getUnblockedItems()` Gets all items that are in the queue but not blocked
`Set<Queue.Task>`	`getUnblockedTasks()` Works just like `getUnblockedItems()` but return tasks.
`static boolean`	`ifBlockedByHudsonShutdown(Queue.Task task)` Deprecated. Use `isBlockedByShutdown(hudson.model.Queue.Task)` instead.
`static void`	`init(Jenkins h)` Restores the queue content during the start up.
`static boolean`	`isBlockedByShutdown(Queue.Task task)` Checks whether a task should not be scheduled because `Jenkins.isQuietingDown()`.
`boolean`	`isEmpty()`
`boolean`	`isPending(Queue.Task t)` Is the given task currently pending execution?
`void`	`load()` Loads the queue contents that was `saved`.
`void`	`maintain()` Queue maintenance.
`void`	`save()` Persists the queue contents to the disk.
`Queue.WaitingItem`	`schedule(AbstractProject p)` Schedule a new build for this project.
`Queue.WaitingItem`	`schedule(Queue.Task p, int quietPeriod)`
`Queue.WaitingItem`	`schedule(Queue.Task p, int quietPeriod, Action... actions)` Convenience wrapper method around `schedule(Task, int, List)`
`Queue.WaitingItem`	`schedule(Queue.Task p, int quietPeriod, List<Action> actions)` Deprecated. as of 1.521 Use `schedule2(Task, int, List)`
`ScheduleResult`	`schedule2(Queue.Task p, int quietPeriod, Action... actions)` Convenience wrapper method around `schedule2(Task, int, List)`
`ScheduleResult`	`schedule2(Queue.Task p, int quietPeriod, List<Action> actions)` Schedules an execution of a task.
`Future<?>`	`scheduleMaintenance()` Checks the queue and runs anything that can be run.
`void`	`setLoadBalancer(LoadBalancer loadBalancer)`
`void`	`setSorter(QueueSorter sorter)`
`int`	`strictCountBuildableItemsFor(Label l)` How many `BuildableItem`s are assigned for the given label?
`static boolean`	`tryWithLock(Runnable runnable)` Invokes the supplied `Runnable` if the `Queue` lock was obtained without blocking.
`static <V> V`	`withLock(Callable<V> callable)` Some operations require to be performed with the `Queue` lock held.
`static <V,T extends Throwable> V`	`withLock(hudson.remoting.Callable<V,T> callable)` Some operations require the `Queue` lock held.
`static void`	`withLock(Runnable runnable)` Some operations require to be performed with the `Queue` lock held.
`static <V> Callable<V>`	`wrapWithLock(Callable<V> callable)` Wraps a `Callable` with the `Queue` lock held.
`static <V,T extends Throwable> hudson.remoting.Callable<V,T>`	`wrapWithLock(hudson.remoting.Callable<V,T> callable)` Wraps a `Callable` with the `Queue` lock held.
`static Runnable`	`wrapWithLock(Runnable runnable)` Wraps a `Runnable` with the `Queue` lock held.

Methods inherited from class hudson.model.ResourceController
canRun, execute, getBlockingActivity, getMissingResource

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

- Field Detail
  - XSTREAM
```
public static final com.thoughtworks.xstream.XStream XSTREAM
```
    This XStream instance is used to persist Queue.Tasks.
- Constructor Detail
  - Queue
```
public Queue(@Nonnull
             LoadBalancer loadBalancer)
```
- Method Detail
  - getLoadBalancer
```
public LoadBalancer getLoadBalancer()
```
  - setLoadBalancer
```
public void setLoadBalancer(@Nonnull
                            LoadBalancer loadBalancer)
```
  - getSorter
```
public QueueSorter getSorter()
```
  - setSorter
```
public void setSorter(QueueSorter sorter)
```
  - load
```
public void load()
```
    Loads the queue contents that was saved.
  - save
```
public void save()
```
    Persists the queue contents to the disk.
    
    Specified by:
    
    save in interface Saveable
  - clear
```
public void clear()
```
    Wipes out all the items currently in the queue, as if all of them are cancelled at once.
  - add
```
@Deprecated
public boolean add(AbstractProject p)
```
    Deprecated. as of 1.311 Use schedule(AbstractProject)
  - schedule
```
@CheckForNull
public Queue.WaitingItem schedule(AbstractProject p)
```
    Schedule a new build for this project.
    
    See Also:
    
    schedule(Task, int)
  - add
```
@Deprecated
public boolean add(AbstractProject p,
                               int quietPeriod)
```
    Deprecated. as of 1.311 Use schedule(Task, int)
    
    Schedules a new build with a custom quiet period.
    Left for backward compatibility with <1.114.
    
    Since:
    
    1.105
  - schedule
```
@Deprecated
public Queue.WaitingItem schedule(Queue.Task p,
                                              int quietPeriod,
                                              List<Action> actions)
```
    Deprecated. as of 1.521 Use schedule2(Task, int, List)
  - schedule2
```
@Nonnull
public ScheduleResult schedule2(Queue.Task p,
                                         int quietPeriod,
                                         List<Action> actions)
```
    Schedules an execution of a task.
    
    Parameters:
    
    actions - These actions can be used for associating information scoped to a particular build, to the task being queued. Upon the start of the build, these Actions will be automatically added to the Run object, and hence available to everyone. For the convenience of the caller, this list can contain null, and those will be silently ignored.
    
    Returns:
    
    ScheduleResult.Refused if Jenkins refused to add this task into the queue (for example because the system is about to shutdown.) Otherwise the task is either merged into existing items in the queue (in which case you get ScheduleResult.Existing instance back), or a new item gets created in the queue (in which case you get ScheduleResult.Created. Note the nature of the queue is that such Item only captures the state of the item at a particular moment, and by the time you inspect the object, some of its information can be already stale. That said, one can still look at Queue.Item.future, Queue.Item.getId(), etc.
    
    Since:
    
    1.311
  - add
```
@Deprecated
public boolean add(Queue.Task p,
                               int quietPeriod)
```
    Deprecated. as of 1.311 Use schedule(Task, int)
  - schedule
```
@CheckForNull
public Queue.WaitingItem schedule(Queue.Task p,
                                                int quietPeriod)
```
  - add
```
@Deprecated
public boolean add(Queue.Task p,
                               int quietPeriod,
                               Action... actions)
```
    Deprecated. as of 1.311 Use schedule(Task, int, Action...)
  - schedule
```
@CheckForNull
public Queue.WaitingItem schedule(Queue.Task p,
                                                int quietPeriod,
                                                Action... actions)
```
    Convenience wrapper method around schedule(Task, int, List)
  - schedule2
```
@Nonnull
public ScheduleResult schedule2(Queue.Task p,
                                         int quietPeriod,
                                         Action... actions)
```
    Convenience wrapper method around schedule2(Task, int, List)
  - cancel
```
public boolean cancel(Queue.Task p)
```
    Cancels the item in the queue. If the item is scheduled more than once, cancels the first occurrence.
    
    Returns:
    
    true if the project was indeed in the queue and was removed. false if this was no-op.
  - cancel
```
public boolean cancel(Queue.Item item)
```
  - doCancelItem
```
public org.kohsuke.stapler.HttpResponse doCancelItem(@QueryParameter
                                                     long id)
                                              throws IOException,
                                                     javax.servlet.ServletException
```
    Called from queue.jelly and queue-items.jelly.
    
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - isEmpty
```
public boolean isEmpty()
```
  - getItems
```
@Exported(inline=true)
public Queue.Item[] getItems()
```
    Gets a snapshot of items in the queue. Generally speaking the array is sorted such that the items that are most likely built sooner are at the end.
  - getDiscoverableItems
```
@Restricted(value=org.kohsuke.accmod.restrictions.NoExternalUse.class)
 @Exported(inline=true)
public Queue.StubItem[] getDiscoverableItems()
```
    Returns an array of Item for which it is only visible the name of the task. Generally speaking the array is sorted such that the items that are most likely built sooner are at the end.
  - getApproximateItemsQuickly
```
@Deprecated
public List<Queue.Item> getApproximateItemsQuickly()
```
    Deprecated. Use getItems() directly. As of 1.607 the approximation is no longer needed.
    
    Like getItems(), but returns an approximation that might not be completely up-to-date.
    At the expense of accuracy, this method does not usually lock Queue and therefore is faster in a highly concurrent situation.
    The list obtained is an accurate snapshot of the queue at some point in the past. The snapshot is updated and normally no more than one second old, but this is a soft commitment that might get violated when the lock on Queue is highly contended.
    This method is primarily added to make UI threads run faster.
    
    Since:
    
    1.483
  - getItem
```
public Queue.Item getItem(long id)
```
  - getBuildableItems
```
public List<Queue.BuildableItem> getBuildableItems(Computer c)
```
    Gets all the BuildableItems that are waiting for an executor in the given Computer.
  - getBuildableItems
```
public List<Queue.BuildableItem> getBuildableItems()
```
    Gets the snapshot of all BuildableItems.
  - getPendingItems
```
public List<Queue.BuildableItem> getPendingItems()
```
    Gets the snapshot of all BuildableItems.
  - getBlockedItems
```
protected List<Queue.BlockedItem> getBlockedItems()
```
    Gets the snapshot of all Queue.BlockedItems.
  - getLeftItems
```
public Collection<Queue.LeftItem> getLeftItems()
```
    Returns the snapshot of all Queue.LeftItems.
    
    Since:
    
    1.519
  - clearLeftItems
```
public void clearLeftItems()
```
    Immediately clear the getLeftItems() cache. Useful for tests which need to verify that no links to a build remain.
    
    Since:
    
    1.519
  - getUnblockedItems
```
public List<Queue.Item> getUnblockedItems()
```
    Gets all items that are in the queue but not blocked
    
    Since:
    
    1.402
  - getUnblockedTasks
```
public Set<Queue.Task> getUnblockedTasks()
```
    Works just like getUnblockedItems() but return tasks.
    
    Since:
    
    1.402
  - isPending
```
public boolean isPending(Queue.Task t)
```
    Is the given task currently pending execution?
  - countBuildableItemsFor
```
@Nonnegative
public int countBuildableItemsFor(@CheckForNull
                                               Label l)
```
    How many BuildableItems are assigned for the given label?
    
    Parameters:
    
    l - Label to be checked. If null, any label will be accepted. If you want to count BuildableItems without assigned labels, use strictCountBuildableItemsFor(hudson.model.Label).
    
    Returns:
    
    Number of BuildableItems for the specified label.
  - strictCountBuildableItemsFor
```
@Nonnegative
public int strictCountBuildableItemsFor(@CheckForNull
                                                     Label l)
```
    How many BuildableItems are assigned for the given label?
    The implementation is quite similar to countBuildableItemsFor(hudson.model.Label), but it has another behavior for null parameters.
    
    Parameters:
    
    l - Label to be checked. If null, only jobs without assigned labels will be taken into the account.
    
    Returns:
    
    Number of BuildableItems for the specified label.
    
    Since:
    
    1.615
  - countBuildableItems
```
public int countBuildableItems()
```
    Counts all the BuildableItems currently in the queue.
  - getItem
```
public Queue.Item getItem(Queue.Task t)
```
    Gets the information about the queue item for the given project.
    
    Returns:
    
    null if the project is not in the queue.
  - getItems
```
public List<Queue.Item> getItems(Queue.Task t)
```
    Gets the information about the queue item for the given project.
    
    Returns:
    
    empty if the project is not in the queue.
  - contains
```
public boolean contains(Queue.Task t)
```
    Returns true if this queue contains the said project.
  - scheduleMaintenance
```
@WithBridgeMethods(value=void.class)
public Future<?> scheduleMaintenance()
```
    Checks the queue and runs anything that can be run.
    When conditions are changed, this method should be invoked.
    This wakes up one Executor so that it will maintain a queue.
  - withLock
```
public static void withLock(Runnable runnable)
```
    Some operations require to be performed with the Queue lock held. Use one of these methods rather than locking directly on Queue in order to allow for future refactoring.
    
    Parameters:
    
    runnable - the operation to perform.
    
    Since:
    
    1.592
  - withLock
```
public static <V,T extends Throwable> V withLock(hudson.remoting.Callable<V,T> callable)
                                          throws T extends Throwable
```
    Some operations require the Queue lock held. Use one of these methods rather than locking directly on Queue in order to allow for future refactoring.
    
    Type Parameters:
    
    V - the type of return value
    
    T - the type of exception.
    
    Parameters:
    
    callable - the operation to perform.
    
    Returns:
    
    the result of the callable.
    
    Throws:
    
    T - the exception of the callable
    
    T extends Throwable
    
    Since:
    
    1.592
  - withLock
```
public static <V> V withLock(Callable<V> callable)
                      throws Exception
```
    Some operations require to be performed with the Queue lock held. Use one of these methods rather than locking directly on Queue in order to allow for future refactoring.
    
    Type Parameters:
    
    V - the type of return value
    
    Parameters:
    
    callable - the operation to perform.
    
    Returns:
    
    the result of the callable.
    
    Throws:
    
    Exception - if the callable throws an exception.
    
    Since:
    
    1.592
  - tryWithLock
```
public static boolean tryWithLock(Runnable runnable)
```
    Invokes the supplied Runnable if the Queue lock was obtained without blocking.
    
    Parameters:
    
    runnable - the operation to perform.
    
    Returns:
    
    true if the lock was available and the operation was performed.
    
    Since:
    
    1.618
  - wrapWithLock
```
public static Runnable wrapWithLock(Runnable runnable)
```
    Wraps a Runnable with the Queue lock held.
    
    Parameters:
    
    runnable - the operation to wrap.
    
    Since:
    
    1.618
  - wrapWithLock
```
public static <V,T extends Throwable> hudson.remoting.Callable<V,T> wrapWithLock(hudson.remoting.Callable<V,T> callable)
```
    Wraps a Callable with the Queue lock held.
    
    Parameters:
    
    callable - the operation to wrap.
    
    Since:
    
    1.618
  - wrapWithLock
```
public static <V> Callable<V> wrapWithLock(Callable<V> callable)
```
    Wraps a Callable with the Queue lock held.
    
    Parameters:
    
    callable - the operation to wrap.
    
    Since:
    
    1.618
  - _await
```
protected void _await()
               throws InterruptedException
```
    Overrides:
    
    _await in class ResourceController
    
    Throws:
    
    InterruptedException
  - _signalAll
```
protected void _signalAll()
```
    Overrides:
    
    _signalAll in class ResourceController
  - _withLock
```
protected void _withLock(Runnable runnable)
```
    Some operations require to be performed with the Queue lock held. Use one of these methods rather than locking directly on Queue in order to allow for future refactoring.
    
    Overrides:
    
    _withLock in class ResourceController
    
    Parameters:
    
    runnable - the operation to perform.
    
    Since:
    
    1.592
  - _tryWithLock
```
protected boolean _tryWithLock(Runnable runnable)
```
    Invokes the supplied Runnable if the Queue lock was obtained without blocking.
    
    Parameters:
    
    runnable - the operation to perform.
    
    Returns:
    
    true if the lock was available and the operation was performed.
    
    Since:
    
    1.618
  - _withLock
```
protected <V,T extends Throwable> V _withLock(hudson.remoting.Callable<V,T> callable)
                                       throws T extends Throwable
```
    Some operations require to be performed with the Queue lock held. Use one of these methods rather than locking directly on Queue in order to allow for future refactoring.
    
    Overrides:
    
    _withLock in class ResourceController
    
    Type Parameters:
    
    V - the type of return value
    
    T - the type of exception.
    
    Parameters:
    
    callable - the operation to perform.
    
    Returns:
    
    the result of the callable.
    
    Throws:
    
    T - the exception of the callable
    
    T extends Throwable
    
    Since:
    
    1.592
  - _withLock
```
protected <V> V _withLock(Callable<V> callable)
                   throws Exception
```
    Some operations require to be performed with the Queue lock held. Use one of these methods rather than locking directly on Queue in order to allow for future refactoring.
    
    Overrides:
    
    _withLock in class ResourceController
    
    Type Parameters:
    
    V - the type of return value
    
    Parameters:
    
    callable - the operation to perform.
    
    Returns:
    
    the result of the callable.
    
    Throws:
    
    Exception - if the callable throws an exception.
    
    Since:
    
    1.592
  - maintain
```
public void maintain()
```
    Queue maintenance.
    Move projects between waitingList, blockedProjects, buildables, and pendings appropriately.
    Jenkins internally invokes this method by itself whenever there's a change that can affect the scheduling (such as new node becoming online, # of executors change, a task completes execution, etc.), and it also gets invoked periodically (see Queue.MaintainTask.)
  - ifBlockedByHudsonShutdown
```
@Deprecated
public static boolean ifBlockedByHudsonShutdown(Queue.Task task)
```
    Deprecated. Use isBlockedByShutdown(hudson.model.Queue.Task) instead.
  - isBlockedByShutdown
```
public static boolean isBlockedByShutdown(Queue.Task task)
```
    Checks whether a task should not be scheduled because Jenkins.isQuietingDown().
    
    Parameters:
    
    task - some queue task
    
    Returns:
    
    true if Jenkins.isQuietingDown() unless this is a Queue.NonBlockingTask
    
    Since:
    
    1.598
  - getApi
```
public Api getApi()
```
  - getInstance
```
@CLIResolver
public static Queue getInstance()
```
  - init
```
@Initializer(after=JOB_CONFIG_ADAPTED)
public static void init(Jenkins h)
```
    Restores the queue content during the start up.

Class Queue

Nested Class Summary

Field Summary

Fields inherited from interface hudson.model.Saveable

Constructor Summary

Method Summary

Methods inherited from class hudson.model.ResourceController

Methods inherited from class java.lang.Object

Field Detail

XSTREAM

Constructor Detail

Queue

Method Detail

getLoadBalancer

setLoadBalancer

getSorter

setSorter

load

save

clear

add

schedule

add

schedule

schedule2

add

schedule

add

schedule

schedule2

cancel

cancel

doCancelItem

isEmpty

getItems

getDiscoverableItems

getApproximateItemsQuickly

getItem

getBuildableItems

getBuildableItems

getPendingItems

getBlockedItems

getLeftItems

clearLeftItems

getUnblockedItems

getUnblockedTasks

isPending

countBuildableItemsFor

strictCountBuildableItemsFor

countBuildableItems

getItem

getItems

contains

scheduleMaintenance

withLock

withLock

withLock

tryWithLock

wrapWithLock

wrapWithLock

wrapWithLock

_await

_signalAll

_withLock

_tryWithLock

_withLock

_withLock

maintain

ifBlockedByHudsonShutdown

isBlockedByShutdown

getApi

getInstance

init