Class VFSFileHandlerReloadingDetector
- java.lang.Object
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- org.apache.commons.configuration2.reloading.FileHandlerReloadingDetector
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- org.apache.commons.configuration2.reloading.VFSFileHandlerReloadingDetector
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- All Implemented Interfaces:
ReloadingDetector
public class VFSFileHandlerReloadingDetector extends FileHandlerReloadingDetector
A file-based reloading strategy that uses Commons VFS to determine when a file was changed.
This reloading strategy is very similar to
FileHandlerReloadingDetector, except for the fact that it uses VFS and thus can deal with a variety of different configuration sources.This strategy only works with FileConfiguration instances.
- Since:
- 1.7
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Constructor Summary
Constructors Constructor Description VFSFileHandlerReloadingDetector()Creates a new instance ofVFSFileHandlerReloadingDetectorand initializes it with an emptyFileHandlerobject.VFSFileHandlerReloadingDetector(FileHandler handler)Creates a new instance ofVFSFileHandlerReloadingDetectorand initializes it with the givenFileHandlerobject.VFSFileHandlerReloadingDetector(FileHandler handler, long refreshDelay)Creates a new instance ofVFSFileHandlerReloadingDetectorand initializes it with the givenFileHandlerobject and the given refresh delay.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected org.apache.commons.vfs2.FileObjectgetFileObject()Gets the file that is monitored by this strategy.protected longgetLastModificationDate()Gets the date of the last modification of the monitored file.protected StringresolveFileURI()Resolves the URI of the monitored file.-
Methods inherited from class org.apache.commons.configuration2.reloading.FileHandlerReloadingDetector
getFile, getFileHandler, getRefreshDelay, isReloadingRequired, refresh, reloadingPerformed, updateLastModified
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Constructor Detail
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VFSFileHandlerReloadingDetector
public VFSFileHandlerReloadingDetector()
Creates a new instance ofVFSFileHandlerReloadingDetectorand initializes it with an emptyFileHandlerobject.
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VFSFileHandlerReloadingDetector
public VFSFileHandlerReloadingDetector(FileHandler handler, long refreshDelay)
Creates a new instance ofVFSFileHandlerReloadingDetectorand initializes it with the givenFileHandlerobject and the given refresh delay.- Parameters:
handler- theFileHandlerrefreshDelay- the refresh delay
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VFSFileHandlerReloadingDetector
public VFSFileHandlerReloadingDetector(FileHandler handler)
Creates a new instance ofVFSFileHandlerReloadingDetectorand initializes it with the givenFileHandlerobject.- Parameters:
handler- theFileHandler
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Method Detail
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getLastModificationDate
protected long getLastModificationDate()
Gets the date of the last modification of the monitored file. A return value of 0 indicates, that the monitored file does not exist. This implementation uses Commons VFS to obtain aFileObjectand read the date of the last modification.- Overrides:
getLastModificationDatein classFileHandlerReloadingDetector- Returns:
- the last modification date in milliseconds.
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getFileObject
protected org.apache.commons.vfs2.FileObject getFileObject()
Gets the file that is monitored by this strategy. Note that the return value can be null under some circumstances.- Returns:
- the monitored file
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resolveFileURI
protected String resolveFileURI()
Resolves the URI of the monitored file.- Returns:
- the URI of the monitored file or null if it cannot be resolved
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