org.eclipse.jetty.util
类 Scanner

java.lang.Object
  org.eclipse.jetty.util.component.AbstractLifeCycle
      org.eclipse.jetty.util.Scanner

所有已实现的接口：

LifeCycle

public class Scanner
extends AbstractLifeCycle

Scanner Utility for scanning a directory for added, removed and changed files and reporting these events via registered Listeners.

嵌套类摘要

static interface	Scanner.BulkListener
static interface	Scanner.DiscreteListener
static interface	Scanner.Listener Listener Marker for notifications re file changes.
static class	Scanner.Notification
static interface	Scanner.ScanCycleListener Listener that notifies when a scan has started and when it has ended.
static interface	Scanner.ScanListener

从类 org.eclipse.jetty.util.component.AbstractLifeCycle 继承的嵌套类/接口

AbstractLifeCycle.AbstractLifeCycleListener

字段摘要

从类 org.eclipse.jetty.util.component.AbstractLifeCycle 继承的字段

FAILED, RUNNING, STARTED, STARTING, STOPPED, STOPPING

构造方法摘要

Scanner()

方法摘要

void	addListener(Scanner.Listener listener) Add an added/removed/changed listener
void	addScanDir(File dir)
void	doStart() Start the scanning action.
void	doStop() Stop the scanning.
FilenameFilter	getFilenameFilter() Get any filter applied to files in the scan dir.
boolean	getRecursive()
boolean	getReportDirs()
boolean	getReportExistingFilesOnStartup()
int	getScanDepth() Get the scanDepth.
File	getScanDir() 已过时。 use getScanDirs() instead
List<File>	getScanDirs()
int	getScanInterval() Get the scan interval
Timer	newTimer()
TimerTask	newTimerTask()
void	removeListener(Scanner.Listener listener) Remove a registered listener
void	reportDifferences(Map<String,org.eclipse.jetty.util.Scanner.TimeNSize> currentScan, Map<String,org.eclipse.jetty.util.Scanner.TimeNSize> oldScan) Report the adds/changes/removes to the registered listeners
void	scan() Perform a pass of the scanner and report changes
void	scanFiles() Recursively scan all files in the designated directories.
void	schedule()
void	setFilenameFilter(FilenameFilter filter) Apply a filter to files found in the scan directory.
void	setRecursive(boolean recursive)
void	setReportDirs(boolean dirs) Set if found directories should be reported.
void	setReportExistingFilesOnStartup(boolean reportExisting) Whether or not an initial scan will report all files as being added.
void	setScanDepth(int scanDepth) Set the scanDepth.
void	setScanDir(File dir) 已过时。 use setScanDirs(List dirs) instead
void	setScanDirs(List<File> dirs)
void	setScanInterval(int scanInterval) Set the scan interval

从类 org.eclipse.jetty.util.component.AbstractLifeCycle 继承的方法

addLifeCycleListener, getState, getState, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, removeLifeCycleListener, start, stop

从类 java.lang.Object 继承的方法

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造方法详细信息

Scanner

public Scanner()

方法详细信息

getScanInterval

public int getScanInterval()

Get the scan interval

返回：

interval between scans in seconds

setScanInterval

public void setScanInterval(int scanInterval)

Set the scan interval

参数：

scanInterval - pause between scans in seconds, or 0 for no scan after the initial scan.

setScanDir

@Deprecated
public void setScanDir(File dir)

已过时。 use setScanDirs(List dirs) instead

Set the location of the directory to scan.

参数：

dir -

getScanDir

@Deprecated
public File getScanDir()

已过时。 use getScanDirs() instead

Get the location of the directory to scan

返回：

the first directory (of getScanDirs() being scanned)

setScanDirs

public void setScanDirs(List<File> dirs)

addScanDir

public void addScanDir(File dir)

getScanDirs

public List<File> getScanDirs()

setRecursive

public void setRecursive(boolean recursive)

参数：

recursive - True if scanning is recursive

另请参见：

setScanDepth(int)

getRecursive

public boolean getRecursive()

返回：

True if scanning is fully recursive (scandepth==-1)

另请参见：

getScanDepth()

getScanDepth

public int getScanDepth()

Get the scanDepth.

返回：

the scanDepth

setScanDepth

public void setScanDepth(int scanDepth)

Set the scanDepth.

参数：

scanDepth - the scanDepth to set

setFilenameFilter

public void setFilenameFilter(FilenameFilter filter)

Apply a filter to files found in the scan directory. Only files matching the filter will be reported as added/changed/removed.

参数：

filter -

getFilenameFilter

public FilenameFilter getFilenameFilter()

Get any filter applied to files in the scan dir.

返回：

the filename filter

setReportExistingFilesOnStartup

public void setReportExistingFilesOnStartup(boolean reportExisting)

Whether or not an initial scan will report all files as being added.

参数：

reportExisting - if true, all files found on initial scan will be reported as being added, otherwise not

getReportExistingFilesOnStartup

public boolean getReportExistingFilesOnStartup()

setReportDirs

public void setReportDirs(boolean dirs)

Set if found directories should be reported.

参数：

dirs -

getReportDirs

public boolean getReportDirs()

addListener

public void addListener(Scanner.Listener listener)

Add an added/removed/changed listener

参数：

listener -

removeListener

public void removeListener(Scanner.Listener listener)

Remove a registered listener

参数：

listener - the Listener to be removed

doStart

public void doStart()

Start the scanning action.

覆盖：

类 AbstractLifeCycle 中的 doStart

newTimerTask

public TimerTask newTimerTask()

newTimer

public Timer newTimer()

schedule

public void schedule()

doStop

public void doStop()

Stop the scanning.

覆盖：

类 AbstractLifeCycle 中的 doStop

scan

public void scan()

Perform a pass of the scanner and report changes

scanFiles

public void scanFiles()

Recursively scan all files in the designated directories.

reportDifferences

public void reportDifferences(Map<String,org.eclipse.jetty.util.Scanner.TimeNSize> currentScan,
                              Map<String,org.eclipse.jetty.util.Scanner.TimeNSize> oldScan)

Report the adds/changes/removes to the registered listeners

参数：

currentScan - the info from the most recent pass

oldScan - info from the previous pass