Computer (Jenkins core 2.168 API)

java.lang.Object
- hudson.model.AbstractModelObject
- - hudson.model.Actionable
  - - hudson.model.Computer

All Implemented Interfaces:

DescriptorByNameOwner, ExecutorListener, ModelObject, SearchableModelObject, SearchItem, AccessControlled, ModelObjectWithContextMenu

Direct Known Subclasses:

Jenkins.MasterComputer, SlaveComputer
```
@ExportedBean
public abstract class Computer
extends Actionable
implements AccessControlled, ExecutorListener, DescriptorByNameOwner
```
Represents the running state of a remote computer that holds Executors.
Executors on one Computer are transparently interchangeable (that is the definition of Computer).
This object is related to Node but they have some significant differences. Computer primarily works as a holder of Executors, so if a Node is configured (probably temporarily) with 0 executors, you won't have a Computer object for it (except for the master node, which always gets its Computer in case we have no static executors and we need to run a Queue.FlyweightTask - see JENKINS-7291 for more discussion.) Also, even if you remove a Node, it takes time for the corresponding Computer to be removed, if some builds are already in progress on that node. Or when the node configuration is changed, unaffected Computer object remains intact, while all the Node objects will go away.
This object also serves UI (unlike Node), and can be used along with TransientComputerActionFactory to add Actions to Computers.

Author:

Kohsuke Kawaguchi

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`Computer.DisplayExecutor` A value class to provide a consistent snapshot view of the state of an executor to avoid race conditions during rendering of the executors list.
`static class`	`Computer.TerminationRequest` Used to trace requests to terminate a computer.

Nested classes/interfaces inherited from interface jenkins.model.ModelObjectWithContextMenu
ModelObjectWithContextMenu.ContextMenu, ModelObjectWithContextMenu.ContextMenuVisibility, ModelObjectWithContextMenu.MenuItem

Field Summary

Fields
Modifier and Type	Field and Description
`static Permission`	`BUILD`
`static Permission`	`CONFIGURE`
`static Permission`	`CONNECT`
`static Permission`	`CREATE`
`static Permission`	`DELETE`
`static Permission`	`DISCONNECT`
`static Permission`	`EXTENDED_READ`
`protected String`	`nodeName` `Node` object may be created and deleted independently from this object.
`protected OfflineCause`	`offlineCause` Contains info about reason behind computer being offline.
`static PermissionGroup`	`PERMISSIONS`
`protected Object`	`statusChangeLock`
`static ExecutorService`	`threadPoolForRemoting`
`protected List<Action>`	`transientActions`

Constructor Summary

Constructors
Constructor and Description

Computer(Node node)

Constructors
Constructor and Description
`Computer(Node node)`

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`protected abstract Future<?>`	`_connect(boolean forceReconnect)` Allows implementing-classes to provide an implementation for the connect method.
`protected void`	`_doScript(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp, String view)`
`void`	`addAction(Action a)` Adds a new action.
`EnvVars`	`buildEnvironment(TaskListener listener)` Creates an environment variable override to be used for launching processes on this node.
`void`	`cliConnect(boolean force)` Deprecated. Implementation of CLI command "connect-node" moved to `ConnectNodeCommand`.
`void`	`cliDisconnect(String cause)` Deprecated. Implementation of CLI command "disconnect-node" moved to `DisconnectNodeCommand`.
`void`	`cliOffline(String cause)` Deprecated. Implementation of CLI command "offline-node" moved to `OfflineNodeCommand`.
`void`	`cliOnline()` Deprecated. Implementation of CLI command "online-node" moved to `OnlineNodeCommand`.
`Future<?>`	`connect(boolean forceReconnect)` Do the same as `doLaunchSlaveAgent(StaplerRequest, StaplerResponse)` but outside the context of serving a request.
`int`	`countBusy()` Returns the number of `Executor`s that are doing some work right now.
`int`	`countExecutors()` Returns the current size of the executor pool for this computer.
`int`	`countIdle()` Returns the number of idle `Executor`s that can start working immediately.
`static Computer`	`currentComputer()` Gets the current `Computer` that the build is running.
`Future<?>`	`disconnect()` Deprecated. as of 1.320. Use `disconnect(OfflineCause)` and specify the cause.
`Future<?>`	`disconnect(OfflineCause cause)` Disconnect this computer.
`org.kohsuke.stapler.HttpResponse`	`doChangeOfflineCause(String offlineMessage)`
`void`	`doConfigDotXml(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp)` Accepts `config.xml` submission, as well as serve it.
`void`	`doConfigSubmit(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp)` Accepts the update to the node configuration.
`org.kohsuke.stapler.HttpResponse`	`doDoDelete()` Really deletes the agent.
`void`	`doDumpExportTable(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp)` Dumps the contents of the export table.
`abstract void`	`doLaunchSlaveAgent(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp)` If `getChannel()`==null, attempts to relaunch the agent.
`void`	`doProgressiveLog(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp)` Handles incremental log.
`void`	`doRssAll(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp)`
`void`	`doRssFailed(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp)`
`void`	`doScript(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp)` For system diagnostics.
`void`	`doScriptText(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp)` Run arbitrary Groovy script and return result as plain text.
`org.kohsuke.stapler.HttpResponse`	`doToggleOffline(String offlineMessage)`
`ACL`	`getACL()` Obtains the ACL associated with this object.
`List<Action>`	`getActions()` Returns the transient `Action`s associated with the computer.
`List<Executor>`	`getAllExecutors()` Gets the read-only snapshot view of all `Executor` instances including OneOffExecutors.
`Api`	`getApi()`
`Set<LabelAtom>`	`getAssignedLabels()`
`RunList`	`getBuilds()`
`String`	`getCaption()`
`abstract hudson.remoting.VirtualChannel`	`getChannel()` Gets the channel that can be used to run a program on this computer.
`List<ComputerPanelBox>`	`getComputerPanelBoxs()` Returns list of all boxes `ComputerPanelBox`s.
`long`	`getConnectTime()` Gets the time (since epoch) when this computer connected.
`abstract Charset`	`getDefaultCharset()` Gets the default charset of this computer.
`long`	`getDemandStartMilliseconds()` Returns the time when this computer first became in demand.
`String`	`getDescription()` Returns the `Node` description for this computer
`List<Computer.DisplayExecutor>`	`getDisplayExecutors()` Used to render the list of executors.
`String`	`getDisplayName()`
`EnvVars`	`getEnvironment()` Returns cached environment variables (copy to prevent modification) for the JVM on this computer.
`Map<String,String>`	`getEnvVars()` Deprecated. as of 1.292 Use `getEnvironment()` instead.
`List<Executor>`	`getExecutors()` Gets the read-only snapshot view of all `Executor`s.
`RemotingDiagnostics.HeapDump`	`getHeapDump()` Obtains the heap dump.
`String`	`getHostName()` This method tries to compute the name of the host that's reachable by all the other nodes.
`String`	`getIcon()` Returns the icon for this computer.
`String`	`getIconAltText()`
`String`	`getIconClassName()` Returns the class name that will be used to lookup the icon.
`long`	`getIdleStartMilliseconds()` Returns the time when this computer last became idle.
`LoadStatistics`	`getLoadStatistics()`
`String`	`getLog()` Gets the string representation of the agent log.
`protected File`	`getLogDir()` Directory where rotated agent logs are stored.
`File`	`getLogFile()` This is where the log from the remote agent goes.
`abstract List<LogRecord>`	`getLogRecords()` Gets the logs recorded by this agent.
`AnnotatedLargeText<Computer>`	`getLogText()` Used to URL-bind `AnnotatedLargeText`.
`Map<String,Object>`	`getMonitorData()` Expose monitoring data for the remote API.
`String`	`getName()` Returns `the name of the node`.
`Node`	`getNode()` Returns the `Node` that this computer represents.
`int`	`getNumExecutors()` Number of `Executor`s that are configured for this computer.
`OfflineCause`	`getOfflineCause()` If the computer was offline (either temporarily or not), this method will return the cause.
`String`	`getOfflineCauseReason()` If the computer was offline (either temporarily or not), this method will return the cause as a string (without user info).
`List<OneOffExecutor>`	`getOneOffExecutors()` Gets the read-only snapshot view of all `OneOffExecutor`s.
`abstract RetentionStrategy`	`getRetentionStrategy()` `RetentionStrategy` associated with this computer.
`String`	`getSearchUrl()` Returns the URL of this item relative to the parent `SearchItem`.
`Map<Object,Object>`	`getSystemProperties()` Gets the system properties of the JVM on this computer.
`List<Computer.TerminationRequest>`	`getTerminatedBy()` Returns the list of captured termination requests for this Computer.
`Map<String,String>`	`getThreadDump()` Gets the thread dump of the agent JVM.
`List<AbstractProject>`	`getTiedJobs()` Returns projects that are tied on this node.
`BuildTimelineWidget`	`getTimeline()`
`String`	`getUrl()`
`WorkspaceList`	`getWorkspaceList()` Gets the object that coordinates the workspace allocation on this computer.
`void`	`interrupt()` Interrupt all `Executor`s.
`boolean`	`isAcceptingTasks()` Returns `true` if the computer is accepting tasks.
`protected boolean`	`isAlive()` Returns true if any of the executors are active.
`abstract boolean`	`isConnecting()` Is a `connect(boolean)` operation in progress?
`boolean`	`isIdle()` Returns true if all the executors of this computer are idle.
`boolean`	`isJnlpAgent()` Deprecated. since 2008-05-18. See isLaunchSupported() and ComputerLauncher
`boolean`	`isLaunchSupported()` Returns true if this computer can be launched by Hudson proactively and automatically.
`boolean`	`isManualLaunchAllowed()` This method is called to determine whether manual launching of the agent is allowed at this point in time.
`boolean`	`isOffline()`
`boolean`	`isOnline()`
`boolean`	`isPartiallyIdle()` Returns true if this computer has some idle executors that can take more workload.
`boolean`	`isTemporarilyOffline()` Deprecated. You should almost always want `isOffline()`. This method is marked as deprecated to warn people when they accidentally call this method.
`abstract Boolean`	`isUnix()` True if this computer is a Unix machine (as opposed to Windows machine).
`protected void`	`kill()` Called by `Jenkins.updateComputerList()` to notify `Computer` that it will be discarded.
`void`	`launch()` Deprecated. since 2009-01-06. Use `connect(boolean)`
`protected void`	`onRemoved()` Called by `Jenkins` when this computer is removed.
`void`	`recordTermination()` This method captures the information of a request to terminate a computer instance.
`static void`	`relocateOldLogs()` Relocate log files in the old location to the new location.
`protected void`	`removeExecutor(Executor e)` Called by `Executor` to kill excessive executors from this computer.
`static Computer`	`resolveForCLI(String name)` Used for CLI binding.
`protected void`	`setNode(Node node)` Called to notify `Computer` that its corresponding `Node` configuration is updated.
`void`	`setTemporarilyOffline(boolean temporarilyOffline)` Deprecated. as of 1.320. Use `setTemporarilyOffline(boolean, OfflineCause)`
`void`	`setTemporarilyOffline(boolean temporarilyOffline, OfflineCause cause)` Marks the computer as temporarily offline.
`void`	`taskAccepted(Executor executor, Queue.Task task)` Called whenever a task is accepted by an executor.
`void`	`taskCompleted(Executor executor, Queue.Task task, long durationMS)` Called whenever a task is completed without any problems by an executor.
`void`	`taskCompletedWithProblems(Executor executor, Queue.Task task, long durationMS, Throwable problems)` Called whenever a task is completed with some problems by an executor.
`void`	`updateByXml(InputStream source)` Updates Job by its XML definition.
`void`	`waitUntilOffline()`
`void`	`waitUntilOnline()` Blocks until the node becomes online/offline.

Methods inherited from class hudson.model.Actionable
addOrReplaceAction, doContextMenu, getAction, getAction, getActions, getAllActions, getDynamic, removeAction, removeActions, replaceAction, replaceActions

Methods inherited from class hudson.model.AbstractModelObject
getSearch, getSearchIndex, getSearchName, makeSearchIndex, requirePOST, sendError, sendError, sendError, sendError, sendError

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

Methods inherited from interface hudson.security.AccessControlled
checkPermission, hasPermission, hasPermission

Methods inherited from interface hudson.model.DescriptorByNameOwner
getDescriptorByName

- Field Detail
  - offlineCause
```
protected volatile OfflineCause offlineCause
```
    Contains info about reason behind computer being offline.
  - nodeName
```
protected String nodeName
```
    Node object may be created and deleted independently from this object.
  - transientActions
```
protected transient List<Action> transientActions
```
  - statusChangeLock
```
protected final Object statusChangeLock
```
  - threadPoolForRemoting
```
public static final ExecutorService threadPoolForRemoting
```
  - PERMISSIONS
```
public static final PermissionGroup PERMISSIONS
```
  - CONFIGURE
```
public static final Permission CONFIGURE
```
  - EXTENDED_READ
```
public static final Permission EXTENDED_READ
```
    Since:
    
    1.532
  - DELETE
```
public static final Permission DELETE
```
  - CREATE
```
public static final Permission CREATE
```
  - DISCONNECT
```
public static final Permission DISCONNECT
```
  - CONNECT
```
public static final Permission CONNECT
```
  - BUILD
```
public static final Permission BUILD
```
- Constructor Detail
  - Computer
```
public Computer(Node node)
```
- Method Detail
  - recordTermination
```
public void recordTermination()
```
    This method captures the information of a request to terminate a computer instance. Method is public as it needs to be called from AbstractCloudSlave and Nodes. In general you should not need to call this method directly, however if implementing a custom node type or a different path for removing nodes, it may make sense to call this method in order to capture the originating request.
    
    Since:
    
    1.607
  - getTerminatedBy
```
public List<Computer.TerminationRequest> getTerminatedBy()
```
    Returns the list of captured termination requests for this Computer. This method is used by Executor to provide details on why a Computer was removed in-between work being scheduled against the Executor and the Executor starting to execute the task.
    
    Returns:
    
    the (possibly empty) list of termination requests.
    
    Since:
    
    1.607
    
    See Also:
    
    Executor.resetWorkUnit(String)
  - getComputerPanelBoxs
```
public List<ComputerPanelBox> getComputerPanelBoxs()
```
    Returns list of all boxes ComputerPanelBoxs.
  - getActions
```
public List<Action> getActions()
```
    Returns the transient Actions associated with the computer.
    
    Overrides:
    
    getActions in class Actionable
    
    Returns:
    
    a possibly empty list
  - addAction
```
public void addAction(@Nonnull
                      Action a)
```
    Description copied from class: Actionable
    
    Adds a new action. Note: calls to Actionable.getAllActions() that happen before calls to this method may not see the update. Note: this method will always modify the actions
    
    Overrides:
    
    addAction in class Actionable
  - getLogFile
```
@Nonnull
public File getLogFile()
```
    This is where the log from the remote agent goes. The method also creates a log directory if required.
    
    See Also:
    
    getLogDir(), relocateOldLogs()
  - getLogDir
```
@Nonnull
protected File getLogDir()
```
    Directory where rotated agent logs are stored. The method also creates a log directory if required.
    
    Since:
    
    1.613
  - getWorkspaceList
```
public WorkspaceList getWorkspaceList()
```
    Gets the object that coordinates the workspace allocation on this computer.
  - getLog
```
public String getLog()
              throws IOException
```
    Gets the string representation of the agent log.
    
    Throws:
    
    IOException
  - getLogText
```
public AnnotatedLargeText<Computer> getLogText()
```
    Used to URL-bind AnnotatedLargeText.
  - getACL
```
public ACL getACL()
```
    Description copied from interface: AccessControlled
    
    Obtains the ACL associated with this object.
    
    Specified by:
    
    getACL in interface AccessControlled
    
    Returns:
    
    never null.
  - getOfflineCause
```
@Exported
public OfflineCause getOfflineCause()
```
    If the computer was offline (either temporarily or not), this method will return the cause.
    
    Returns:
    
    null if the system was put offline without given a cause.
  - getOfflineCauseReason
```
@Exported
public String getOfflineCauseReason()
```
    If the computer was offline (either temporarily or not), this method will return the cause as a string (without user info).
    
    Returns:
    
    empty string if the system was put offline without given a cause.
  - getChannel
```
@Nullable
public abstract hudson.remoting.VirtualChannel getChannel()
```
    Gets the channel that can be used to run a program on this computer.
    
    Returns:
    
    never null when isOffline()==false.
  - getDefaultCharset
```
public abstract Charset getDefaultCharset()
```
    Gets the default charset of this computer.
    
    Returns:
    
    never null when isOffline()==false.
  - getLogRecords
```
public abstract List<LogRecord> getLogRecords()
                                       throws IOException,
                                              InterruptedException
```
    Gets the logs recorded by this agent.
    
    Throws:
    
    IOException
    
    InterruptedException
  - doLaunchSlaveAgent
```
public abstract void doLaunchSlaveAgent(org.kohsuke.stapler.StaplerRequest req,
                                        org.kohsuke.stapler.StaplerResponse rsp)
                                 throws IOException,
                                        javax.servlet.ServletException
```
    If getChannel()==null, attempts to relaunch the agent.
    
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - launch
```
@Deprecated
public final void launch()
```
    Deprecated. since 2009-01-06. Use connect(boolean)
  - connect
```
public final Future<?> connect(boolean forceReconnect)
```
    Do the same as doLaunchSlaveAgent(StaplerRequest, StaplerResponse) but outside the context of serving a request.
    If already connected or if this computer doesn't support proactive launching, no-op. This method may return immediately while the launch operation happens asynchronously.
    
    Parameters:
    
    forceReconnect - If true and a connect activity is already in progress, it will be cancelled and the new one will be started. If false, and a connect activity is already in progress, this method will do nothing and just return the pending connection operation.
    
    Returns:
    
    A Future representing pending completion of the task. The 'completion' includes both a successful completion and a non-successful completion (such distinction typically doesn't make much sense because as soon as Computer is connected it can be disconnected by some other threads.)
    
    See Also:
    
    disconnect()
  - _connect
```
protected abstract Future<?> _connect(boolean forceReconnect)
```
    Allows implementing-classes to provide an implementation for the connect method.
    If already connected or if this computer doesn't support proactive launching, no-op. This method may return immediately while the launch operation happens asynchronously.
    
    Parameters:
    
    forceReconnect - If true and a connect activity is already in progress, it will be cancelled and the new one will be started. If false, and a connect activity is already in progress, this method will do nothing and just return the pending connection operation.
    
    Returns:
    
    A Future representing pending completion of the task. The 'completion' includes both a successful completion and a non-successful completion (such distinction typically doesn't make much sense because as soon as Computer is connected it can be disconnected by some other threads.)
    
    See Also:
    
    disconnect()
  - cliConnect
```
@Deprecated
public void cliConnect(boolean force)
                            throws ExecutionException,
                                   InterruptedException
```
    Deprecated. Implementation of CLI command "connect-node" moved to ConnectNodeCommand.
    
    Parameters:
    
    force - If true cancel any currently pending connect operation and retry from scratch
    
    Throws:
    
    ExecutionException
    
    InterruptedException
  - getConnectTime
```
public final long getConnectTime()
```
    Gets the time (since epoch) when this computer connected.
    
    Returns:
    
    The time in ms since epoch when this computer last connected.
  - disconnect
```
public Future<?> disconnect(OfflineCause cause)
```
    Disconnect this computer. If this is the master, no-op. This method may return immediately while the launch operation happens asynchronously.
    
    Parameters:
    
    cause - Object that identifies the reason the node was disconnected.
    
    Returns:
    
    Future to track the asynchronous disconnect operation.
    
    Since:
    
    1.320
    
    See Also:
    
    connect(boolean)
  - disconnect
```
@Deprecated
public Future<?> disconnect()
```
    Deprecated. as of 1.320. Use disconnect(OfflineCause) and specify the cause.
    
    Equivalent to disconnect(null)
  - cliDisconnect
```
@Deprecated
public void cliDisconnect(String cause)
                               throws ExecutionException,
                                      InterruptedException
```
    Deprecated. Implementation of CLI command "disconnect-node" moved to DisconnectNodeCommand.
    
    Parameters:
    
    cause - Record the note about why you are disconnecting this node
    
    Throws:
    
    ExecutionException
    
    InterruptedException
  - cliOffline
```
@Deprecated
public void cliOffline(String cause)
                            throws ExecutionException,
                                   InterruptedException
```
    Deprecated. Implementation of CLI command "offline-node" moved to OfflineNodeCommand.
    
    Parameters:
    
    cause - Record the note about why you are disconnecting this node
    
    Throws:
    
    ExecutionException
    
    InterruptedException
  - cliOnline
```
@Deprecated
public void cliOnline()
                           throws ExecutionException,
                                  InterruptedException
```
    Deprecated. Implementation of CLI command "online-node" moved to OnlineNodeCommand.
    
    Throws:
    
    ExecutionException
    
    InterruptedException
  - getNumExecutors
```
@Exported
public int getNumExecutors()
```
    Number of Executors that are configured for this computer.
    When this value is decreased, it is temporarily possible for executors to have a larger number than this.
  - getName
```
@Nonnull
public String getName()
```
    Returns the name of the node.
  - isUnix
```
@CheckForNull
public abstract Boolean isUnix()
```
    True if this computer is a Unix machine (as opposed to Windows machine).
    
    Returns:
    
    null if the computer is disconnected and therefore we don't know whether it is Unix or not.
    
    Since:
    
    1.624
  - getNode
```
@CheckForNull
public Node getNode()
```
    Returns the Node that this computer represents.
    
    Returns:
    
    null if the configuration has changed and the node is removed, yet the corresponding Computer is not yet gone.
  - getLoadStatistics
```
@Exported
public LoadStatistics getLoadStatistics()
```
  - getTimeline
```
public BuildTimelineWidget getTimeline()
```
  - taskAccepted
```
public void taskAccepted(Executor executor,
                         Queue.Task task)
```
    Called whenever a task is accepted by an executor.
    
    Specified by:
    
    taskAccepted in interface ExecutorListener
    
    Parameters:
    
    executor - The executor.
    
    task - The task.
  - taskCompleted
```
public void taskCompleted(Executor executor,
                          Queue.Task task,
                          long durationMS)
```
    Called whenever a task is completed without any problems by an executor.
    
    Specified by:
    
    taskCompleted in interface ExecutorListener
    
    Parameters:
    
    executor - The executor.
    
    task - The task.
    
    durationMS - The number of milliseconds that the task took to complete.
  - taskCompletedWithProblems
```
public void taskCompletedWithProblems(Executor executor,
                                      Queue.Task task,
                                      long durationMS,
                                      Throwable problems)
```
    Called whenever a task is completed with some problems by an executor.
    
    Specified by:
    
    taskCompletedWithProblems in interface ExecutorListener
    
    Parameters:
    
    executor - The executor.
    
    task - The task.
    
    durationMS - The number of milliseconds that the task took to complete.
    
    problems - The exception that was thrown.
  - isOffline
```
@Exported
public boolean isOffline()
```
  - isOnline
```
public final boolean isOnline()
```
  - isManualLaunchAllowed
```
@Exported
public boolean isManualLaunchAllowed()
```
    This method is called to determine whether manual launching of the agent is allowed at this point in time.
    
    Returns:
    
    true if manual launching of the agent is allowed at this point in time.
  - isConnecting
```
public abstract boolean isConnecting()
```
    Is a connect(boolean) operation in progress?
  - isJnlpAgent
```
@Exported
 @Deprecated
public boolean isJnlpAgent()
```
    Deprecated. since 2008-05-18. See isLaunchSupported() and ComputerLauncher
    
    Returns true if this computer is supposed to be launched via JNLP.
  - isLaunchSupported
```
@Exported
public boolean isLaunchSupported()
```
    Returns true if this computer can be launched by Hudson proactively and automatically.
    For example, JNLP agents return false from this, because the launch process needs to be initiated from the agent side.
  - isTemporarilyOffline
```
@Exported
 @Deprecated
public boolean isTemporarilyOffline()
```
    Deprecated. You should almost always want isOffline(). This method is marked as deprecated to warn people when they accidentally call this method.
    
    Returns true if this node is marked temporarily offline by the user.
    In contrast, isOffline() represents the actual online/offline state. For example, this method may return false while isOffline() returns true if the agent failed to launch.
  - setTemporarilyOffline
```
@Deprecated
public void setTemporarilyOffline(boolean temporarilyOffline)
```
    Deprecated. as of 1.320. Use setTemporarilyOffline(boolean, OfflineCause)
  - setTemporarilyOffline
```
public void setTemporarilyOffline(boolean temporarilyOffline,
                                  OfflineCause cause)
```
    Marks the computer as temporarily offline. This retains the underlying Channel connection, but prevent builds from executing.
    
    Parameters:
    
    cause - If the first argument is true, specify the reason why the node is being put offline.
  - getIcon
```
@Exported
public String getIcon()
```
    Returns the icon for this computer. It is both the recommended and default implementation to serve different icons based on isOffline()
    
    See Also:
    
    getIconClassName()
  - getIconClassName
```
@Exported
public String getIconClassName()
```
    Returns the class name that will be used to lookup the icon. This class name will be added as a class tag to the html img tags where the icon should show up followed by a size specifier given by Icon.toNormalizedIconSizeClass(String) The conversion of class tag to src tag is registered through IconSet.addIcon(Icon) It is both the recommended and default implementation to serve different icons based on isOffline()
    
    See Also:
    
    getIcon()
  - getIconAltText
```
public String getIconAltText()
```
  - getDisplayName
```
@Exported
 @Nonnull
public String getDisplayName()
```
    Specified by:
    
    getDisplayName in interface ModelObject
  - getCaption
```
public String getCaption()
```
  - getUrl
```
public String getUrl()
```
  - getAssignedLabels
```
@Exported
public Set<LabelAtom> getAssignedLabels()
```
  - getTiedJobs
```
public List<AbstractProject> getTiedJobs()
```
    Returns projects that are tied on this node.
  - getBuilds
```
public RunList getBuilds()
```
  - setNode
```
protected void setNode(Node node)
```
    Called to notify Computer that its corresponding Node configuration is updated.
  - kill
```
protected void kill()
```
    Called by Jenkins.updateComputerList() to notify Computer that it will be discarded.
    Note that at this point getNode() returns null.
    
    See Also:
    
    onRemoved()
  - onRemoved
```
protected void onRemoved()
```
    Called by Jenkins when this computer is removed.
    This happens when list of nodes are updated (for example by Jenkins.setNodes(List) and the computer becomes redundant. Such Computers get killed, then after all its executors are finished, this method is called.
    Note that at this point getNode() returns null.
    
    Since:
    
    1.510
    
    See Also:
    
    kill()
  - countIdle
```
public int countIdle()
```
    Returns the number of idle Executors that can start working immediately.
  - countBusy
```
public final int countBusy()
```
    Returns the number of Executors that are doing some work right now.
  - countExecutors
```
public final int countExecutors()
```
    Returns the current size of the executor pool for this computer. This number may temporarily differ from getNumExecutors() if there are busy tasks when the configured size is decreased. OneOffExecutors are not included in this count.
  - getExecutors
```
@Exported
 @StaplerDispatchable
public List<Executor> getExecutors()
```
    Gets the read-only snapshot view of all Executors.
  - getOneOffExecutors
```
@Exported
 @StaplerDispatchable
public List<OneOffExecutor> getOneOffExecutors()
```
    Gets the read-only snapshot view of all OneOffExecutors.
  - getAllExecutors
```
public List<Executor> getAllExecutors()
```
    Gets the read-only snapshot view of all Executor instances including OneOffExecutors.
    
    Returns:
    
    the read-only snapshot view of all Executor instances including OneOffExecutors.
    
    Since:
    
    2.55
  - getDisplayExecutors
```
@Restricted(value=org.kohsuke.accmod.restrictions.NoExternalUse.class)
public List<Computer.DisplayExecutor> getDisplayExecutors()
```
    Used to render the list of executors.
    
    Returns:
    
    a snapshot of the executor display information
    
    Since:
    
    1.607
  - isIdle
```
@Exported
public final boolean isIdle()
```
    Returns true if all the executors of this computer are idle.
  - isPartiallyIdle
```
public final boolean isPartiallyIdle()
```
    Returns true if this computer has some idle executors that can take more workload.
  - getIdleStartMilliseconds
```
public final long getIdleStartMilliseconds()
```
    Returns the time when this computer last became idle.
    If this computer is already idle, the return value will point to the time in the past since when this computer has been idle.
    If this computer is busy, the return value will point to the time in the future where this computer will be expected to become free.
  - getDemandStartMilliseconds
```
public final long getDemandStartMilliseconds()
```
    Returns the time when this computer first became in demand.
  - getDescription
```
@Restricted(value=org.kohsuke.accmod.restrictions.DoNotUse.class)
 @Exported
 @Nonnull
public String getDescription()
```
    Returns the Node description for this computer
  - removeExecutor
```
protected void removeExecutor(Executor e)
```
    Called by Executor to kill excessive executors from this computer.
  - isAlive
```
protected boolean isAlive()
```
    Returns true if any of the executors are active.
    
    Since:
    
    1.509
  - interrupt
```
public void interrupt()
```
    Interrupt all Executors. Called from Jenkins.cleanUp().
  - getSearchUrl
```
public String getSearchUrl()
```
    Description copied from interface: SearchItem
    
    Returns the URL of this item relative to the parent SearchItem.
    
    Specified by:
    
    getSearchUrl in interface SearchItem
    
    Returns:
    
    URL like "foo" or "foo/bar". The path can end with '/'. The path that starts with '/' will be interpreted as the absolute path (within the context path of Jenkins.)
  - getRetentionStrategy
```
public abstract RetentionStrategy getRetentionStrategy()
```
    RetentionStrategy associated with this computer.
    
    Returns:
    
    never null. This method return RetentionStrategy<? super T> where T=this.getClass().
  - getMonitorData
```
@Exported(inline=true)
public Map<String,Object> getMonitorData()
```
    Expose monitoring data for the remote API.
  - getSystemProperties
```
public Map<Object,Object> getSystemProperties()
                                       throws IOException,
                                              InterruptedException
```
    Gets the system properties of the JVM on this computer. If this is the master, it returns the system property of the master computer.
    
    Throws:
    
    IOException
    
    InterruptedException
  - getEnvVars
```
@Deprecated
public Map<String,String> getEnvVars()
                                          throws IOException,
                                                 InterruptedException
```
    Deprecated. as of 1.292 Use getEnvironment() instead.
    
    Throws:
    
    IOException
    
    InterruptedException
  - getEnvironment
```
public EnvVars getEnvironment()
                       throws IOException,
                              InterruptedException
```
    Returns cached environment variables (copy to prevent modification) for the JVM on this computer. If this is the master, it returns the system property of the master computer.
    
    Throws:
    
    IOException
    
    InterruptedException
  - buildEnvironment
```
@Nonnull
public EnvVars buildEnvironment(@Nonnull
                                         TaskListener listener)
                                  throws IOException,
                                         InterruptedException
```
    Creates an environment variable override to be used for launching processes on this node.
    
    Throws:
    
    IOException
    
    InterruptedException
    
    Since:
    
    1.489
    
    See Also:
    
    Launcher.ProcStarter.envs(Map)
  - getThreadDump
```
public Map<String,String> getThreadDump()
                                 throws IOException,
                                        InterruptedException
```
    Gets the thread dump of the agent JVM.
    
    Returns:
    
    key is the thread name, and the value is the pre-formatted dump.
    
    Throws:
    
    IOException
    
    InterruptedException
  - getHeapDump
```
public RemotingDiagnostics.HeapDump getHeapDump()
                                         throws IOException
```
    Obtains the heap dump.
    
    Throws:
    
    IOException
  - getHostName
```
public String getHostName()
                   throws IOException,
                          InterruptedException
```
    This method tries to compute the name of the host that's reachable by all the other nodes.
    Since it's possible that the agent is not reachable from the master (it may be behind a firewall, connecting to master via JNLP), this method may return null. It's surprisingly tricky for a machine to know a name that other systems can get to, especially between things like DNS search suffix, the hosts file, and YP.
    So the technique here is to compute possible interfaces and names on the agent, then try to ping them from the master, and pick the one that worked.
    The computation may take some time, so it employs caching to make the successive lookups faster.
    
    Returns:
    
    null if the host name cannot be computed (for example because this computer is offline, because the agent is behind the firewall, etc.)
    
    Throws:
    
    IOException
    
    InterruptedException
    
    Since:
    
    1.300
  - doRssAll
```
public void doRssAll(org.kohsuke.stapler.StaplerRequest req,
                     org.kohsuke.stapler.StaplerResponse rsp)
              throws IOException,
                     javax.servlet.ServletException
```
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - doRssFailed
```
public void doRssFailed(org.kohsuke.stapler.StaplerRequest req,
                        org.kohsuke.stapler.StaplerResponse rsp)
                 throws IOException,
                        javax.servlet.ServletException
```
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - doToggleOffline
```
public org.kohsuke.stapler.HttpResponse doToggleOffline(@QueryParameter
                                                        String offlineMessage)
                                                 throws IOException,
                                                        javax.servlet.ServletException
```
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - doChangeOfflineCause
```
public org.kohsuke.stapler.HttpResponse doChangeOfflineCause(@QueryParameter
                                                             String offlineMessage)
                                                      throws IOException,
                                                             javax.servlet.ServletException
```
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - getApi
```
public Api getApi()
```
  - doDumpExportTable
```
public void doDumpExportTable(org.kohsuke.stapler.StaplerRequest req,
                              org.kohsuke.stapler.StaplerResponse rsp)
                       throws IOException,
                              javax.servlet.ServletException,
                              InterruptedException
```
    Dumps the contents of the export table.
    
    Throws:
    
    IOException
    
    javax.servlet.ServletException
    
    InterruptedException
  - doScript
```
public void doScript(org.kohsuke.stapler.StaplerRequest req,
                     org.kohsuke.stapler.StaplerResponse rsp)
              throws IOException,
                     javax.servlet.ServletException
```
    For system diagnostics. Run arbitrary Groovy script.
    
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - doScriptText
```
public void doScriptText(org.kohsuke.stapler.StaplerRequest req,
                         org.kohsuke.stapler.StaplerResponse rsp)
                  throws IOException,
                         javax.servlet.ServletException
```
    Run arbitrary Groovy script and return result as plain text.
    
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - _doScript
```
protected void _doScript(org.kohsuke.stapler.StaplerRequest req,
                         org.kohsuke.stapler.StaplerResponse rsp,
                         String view)
                  throws IOException,
                         javax.servlet.ServletException
```
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - doConfigSubmit
```
public void doConfigSubmit(org.kohsuke.stapler.StaplerRequest req,
                           org.kohsuke.stapler.StaplerResponse rsp)
                    throws IOException,
                           javax.servlet.ServletException,
                           Descriptor.FormException
```
    Accepts the update to the node configuration.
    
    Throws:
    
    IOException
    
    javax.servlet.ServletException
    
    Descriptor.FormException
  - doConfigDotXml
```
@WebMethod(name="config.xml")
public void doConfigDotXml(org.kohsuke.stapler.StaplerRequest req,
                                                         org.kohsuke.stapler.StaplerResponse rsp)
                                                  throws IOException,
                                                         javax.servlet.ServletException
```
    Accepts config.xml submission, as well as serve it.
    
    Throws:
    
    IOException
    
    javax.servlet.ServletException
  - updateByXml
```
public void updateByXml(InputStream source)
                 throws IOException,
                        javax.servlet.ServletException
```
    Updates Job by its XML definition.
    
    Throws:
    
    IOException
    
    javax.servlet.ServletException
    
    Since:
    
    1.526
  - doDoDelete
```
public org.kohsuke.stapler.HttpResponse doDoDelete()
                                            throws IOException
```
    Really deletes the agent.
    
    Throws:
    
    IOException
  - waitUntilOnline
```
public void waitUntilOnline()
                     throws InterruptedException
```
    Blocks until the node becomes online/offline.
    
    Throws:
    
    InterruptedException
  - waitUntilOffline
```
public void waitUntilOffline()
                      throws InterruptedException
```
    Throws:
    
    InterruptedException
  - doProgressiveLog
```
public void doProgressiveLog(org.kohsuke.stapler.StaplerRequest req,
                             org.kohsuke.stapler.StaplerResponse rsp)
                      throws IOException
```
    Handles incremental log.
    
    Throws:
    
    IOException
  - currentComputer
```
@Nullable
public static Computer currentComputer()
```
    Gets the current Computer that the build is running. This method only works when called during a build, such as by Publisher, BuildWrapper, etc.
    
    Returns:
    
    the Computer associated with Executor.currentExecutor(), or (consistently as of 1.591) null if not on an executor thread
  - isAcceptingTasks
```
@OverridingMethodsMustInvokeSuper
public boolean isAcceptingTasks()
```
    Returns true if the computer is accepting tasks. Needed to allow agents programmatic suspension of task scheduling that does not overlap with being offline.
    
    Returns:
    
    true if the computer is accepting tasks
    
    See Also:
    
    RetentionStrategy.isAcceptingTasks(Computer), Node.isAcceptingTasks()
  - resolveForCLI
```
@CLIResolver
public static Computer resolveForCLI(String name)
                                           throws org.kohsuke.args4j.CmdLineException
```
    Used for CLI binding.
    
    Throws:
    
    org.kohsuke.args4j.CmdLineException
  - relocateOldLogs
```
@Initializer
public static void relocateOldLogs()
```
    Relocate log files in the old location to the new location. Files were used to be $JENKINS_ROOT/slave-NAME.log (and .1, .2, ...) but now they are at $JENKINS_ROOT/logs/slaves/NAME/slave.log (and .1, .2, ...)
    
    See Also:
    
    getLogFile()

Class Computer

Nested Class Summary

Nested classes/interfaces inherited from interface jenkins.model.ModelObjectWithContextMenu

Field Summary

Constructor Summary

Method Summary

Methods inherited from class hudson.model.Actionable

Methods inherited from class hudson.model.AbstractModelObject

Methods inherited from class java.lang.Object

Methods inherited from interface hudson.security.AccessControlled

Methods inherited from interface hudson.model.DescriptorByNameOwner

Field Detail

offlineCause

nodeName

transientActions

statusChangeLock

threadPoolForRemoting

PERMISSIONS

CONFIGURE

EXTENDED_READ

DELETE

CREATE

DISCONNECT

CONNECT

BUILD

Constructor Detail

Computer

Method Detail

recordTermination

getTerminatedBy

getComputerPanelBoxs

getActions

addAction

getLogFile

getLogDir

getWorkspaceList

getLog

getLogText

getACL

getOfflineCause

getOfflineCauseReason

getChannel

getDefaultCharset

getLogRecords

doLaunchSlaveAgent

launch

connect

_connect

cliConnect

getConnectTime

disconnect

disconnect

cliDisconnect

cliOffline

cliOnline

getNumExecutors

getName

isUnix

getNode

getLoadStatistics

getTimeline

taskAccepted

taskCompleted

taskCompletedWithProblems

isOffline

isOnline

isManualLaunchAllowed

isConnecting

isJnlpAgent

isLaunchSupported

isTemporarilyOffline

setTemporarilyOffline

setTemporarilyOffline

getIcon

getIconClassName

getIconAltText

getDisplayName

getCaption

getUrl

getAssignedLabels