public class CacheUtil
extends java.lang.Object
Constructor and Description |
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CacheUtil() |
Modifier and Type | Method and Description |
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static void |
cleanCache()
This will remove all old cache items.
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static boolean |
clearCache()
Clears the cache by deleting all the Netx cache files
Note: Because of how our caching system works, deleting jars of another javaws
process is using them can be quite disasterous.
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static java.io.File |
getCachedResourceFile(java.net.URL location,
Version version,
UpdatePolicy policy)
This is returning File object of cached resource originally from URL
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static java.net.URL |
getCachedResourceURL(java.net.URL location,
Version version,
UpdatePolicy policy)
Caches a resource and returns a URL for it in the cache;
blocks until resource is cached.
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static java.io.File |
getCacheFile(java.net.URL source,
Version version)
Returns the file for the locally cached contents of the
source.
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static java.lang.String |
getCacheParentDirectory(java.lang.String filePath)
Returns the parent directory of the cached resource.
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static java.io.OutputStream |
getOutputStream(java.net.URL source,
Version version)
Returns a buffered output stream open for writing to the
cache file.
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static java.security.Permission |
getReadPermission(java.net.URL location,
Version version)
Returns the Permission object necessary to access the
resource, or
null if no permission is needed. |
static java.lang.String |
hex(java.lang.String origName,
java.lang.String candidate) |
static boolean |
isCacheable(java.net.URL source,
Version version)
Returns whether the resource can be cached as a local file;
if not, then URLConnection.openStream can be used to obtain
the contents.
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static boolean |
isCached(java.net.URL source,
Version version)
Returns true if the cache has a local copy of the contents of
the URL matching the specified version string.
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static boolean |
isCurrent(java.net.URL source,
Version version,
long lastModifed)
Returns whether there is a version of the URL contents in the
cache and it is up to date.
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static java.io.File |
makeNewCacheFile(java.net.URL source,
Version version)
This will create a new entry for the cache item.
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static void |
streamCopy(java.io.InputStream is,
java.io.OutputStream os)
Copies from an input stream to an output stream.
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static java.io.File |
urlToPath(java.net.URL location,
java.lang.String subdir)
Converts a URL into a local path string within the given directory.
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static void |
waitForResources(ApplicationInstance app,
ResourceTracker tracker,
java.net.URL[] resources,
java.lang.String title)
Waits until the resources are downloaded, while showing a
progress indicator.
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public static java.net.URL getCachedResourceURL(java.net.URL location, Version version, UpdatePolicy policy)
location
- location of the resourceversion
- the version, or null
policy
- how to handle updatepublic static java.io.File getCachedResourceFile(java.net.URL location, Version version, UpdatePolicy policy)
location
- original location of blobversion
- version of resourcepolicy
- update policy of resourcepublic static java.security.Permission getReadPermission(java.net.URL location, Version version)
null
if no permission is needed.location
- location of the resourceversion
- the version, or null
public static boolean clearCache()
okToClearCache()
public static boolean isCurrent(java.net.URL source, Version version, long lastModifed)
source
- the source URL
version
- the versions to check forlastModifed
- time in milis since epoch of last modficationjava.lang.IllegalArgumentException
- if the source is not cacheablepublic static boolean isCached(java.net.URL source, Version version)
source
- the source URLversion
- the versions to check forjava.lang.IllegalArgumentException
- if the source is not cacheablepublic static boolean isCacheable(java.net.URL source, Version version)
source
- the url of resourceversion
- version of resourcepublic static java.io.File getCacheFile(java.net.URL source, Version version)
source
- the source URL
version
- the version id of the local filenull
if no versions cachedjava.lang.IllegalArgumentException
- if the source is not cacheablepublic static java.lang.String getCacheParentDirectory(java.lang.String filePath)
filePath
- The path of the cached resource directory.public static java.io.File makeNewCacheFile(java.net.URL source, Version version)
source
- the source URLversion
- the version id of the local filepublic static java.io.OutputStream getOutputStream(java.net.URL source, Version version) throws java.io.IOException
source
- the remote locationversion
- the file version to write tojava.io.IOException
- if IO breakspublic static void streamCopy(java.io.InputStream is, java.io.OutputStream os) throws java.io.IOException
is
- stream to read fromos
- stream to write tojava.io.IOException
- if copy failspublic static java.io.File urlToPath(java.net.URL location, java.lang.String subdir)
location
- the urlsubdir
- the subdirectorypublic static java.lang.String hex(java.lang.String origName, java.lang.String candidate) throws java.security.NoSuchAlgorithmException
java.security.NoSuchAlgorithmException
public static void waitForResources(ApplicationInstance app, ResourceTracker tracker, java.net.URL[] resources, java.lang.String title)
app
- application instance with context for this resourcetracker
- the resource trackerresources
- the resources to wait fortitle
- name of the downloadpublic static void cleanCache()