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java.lang.Objectjava.lang.Thread
org.xins.common.io.FileWatcher
org.xins.common.io.HTTPFileWatcher
File watcher thread. This thread checks if a URL or a set of URLs changed and if it has, it notifies the listener. The check is performed every n seconds, where n can be configured.
Initially this thread will be a daemon thread. This can be changed by
calling Thread.setDaemon(boolean)
.
Nested Class Summary |
Nested classes inherited from class org.xins.common.io.FileWatcher |
FileWatcher.Listener |
Field Summary |
Fields inherited from class org.xins.common.io.FileWatcher |
_filePaths, _lastModified |
Fields inherited from class java.lang.Thread |
MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY |
Constructor Summary | |
HTTPFileWatcher(String[] urls,
int interval,
FileWatcher.Listener listener)
Creates a new HTTPFileWatcher for the specified set of URLs,
with the specified interval. |
|
HTTPFileWatcher(String url,
FileWatcher.Listener listener)
Creates a new HTTPFileWatcher for the specified URL. |
|
HTTPFileWatcher(String url,
int interval,
FileWatcher.Listener listener)
Creates a new HTTPFileWatcher for the specified URL, with the
specified interval. |
Method Summary | |
protected void |
firstCheck()
Performs the first check on the file to determine the date the file was last modified. |
protected long |
getLastModified()
Gets the time at which the last file was modified. |
protected void |
storeFiles(String[] files)
Stores the files in a class variable. |
Methods inherited from class org.xins.common.io.FileWatcher |
check, end, getInterval, run, setInterval |
Methods inherited from class java.lang.Thread |
activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public HTTPFileWatcher(String url, FileWatcher.Listener listener) throws IllegalArgumentException
HTTPFileWatcher
for the specified URL.
The interval must be set before the thread can be started.
url
- the name of the URL to watch, cannot be null
.listener
- the object to notify on events, cannot be null
.
IllegalArgumentException
- if url == null || listener == null
public HTTPFileWatcher(String url, int interval, FileWatcher.Listener listener) throws IllegalArgumentException
HTTPFileWatcher
for the specified URL, with the
specified interval.
url
- the name of the URL to watch, cannot be null
.interval
- the interval in seconds, must be greater than or equal to 0.
if the interval is 0 the interval must be set before the thread can
be started.listener
- the object to notify on events, cannot be null
.
IllegalArgumentException
- if url == null || listener == null || interval < 0
public HTTPFileWatcher(String[] urls, int interval, FileWatcher.Listener listener) throws IllegalArgumentException
HTTPFileWatcher
for the specified set of URLs,
with the specified interval.
urls
- the name of the URLs to watch, cannot be null
.
It should also have at least one URL and none of the URLs should be null
.interval
- the interval in seconds, must be greater than or equal to 0.
if the interval is 0 the interval must be set before the thread can
be started.listener
- the object to notify on events, cannot be null
.
IllegalArgumentException
- if urls == null || listener == null || interval < 0 || urls.length < 1
or if one of the URL is null
.Method Detail |
protected void storeFiles(String[] files)
FileWatcher
storeFiles
in class FileWatcher
files
- the String files to check, cannot be null
.protected void firstCheck()
FileWatcher
SecurityException
, then this
exception is logged and ignored.
firstCheck
in class FileWatcher
protected long getLastModified() throws SecurityException
FileWatcher
getLastModified
in class FileWatcher
SecurityException
- if one of the file could not be read because of a security issue.
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