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.net.URL |
getCachedResource(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.
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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,
java.net.URLConnection connection)
Returns whether there is a version of the URL contents in the
cache and it is up to date.
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static void |
lockFile(PropertiesFile properties)
Lock the property file and add it to our pool of locks.
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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 void |
unlockFile(PropertiesFile properties)
Unlock the property file and remove it from our pool.
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static boolean |
urlEquals(java.net.URL u1,
java.net.URL u2)
Compares a URL using string compare of its protocol, host,
port, path, query, and anchor.
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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 boolean urlEquals(java.net.URL u1, java.net.URL u2)
public static java.net.URL getCachedResource(java.net.URL location, Version version, UpdatePolicy policy)
location
- location of the resourceversion
- the version, or nullpublic static java.security.Permission getReadPermission(java.net.URL location, Version version)
public static boolean clearCache()
okToClearCache()
public static boolean isCurrent(java.net.URL source, Version version, java.net.URLConnection connection)
source
- the source URLversion
- the versions to check forconnection
- a connection to the URL, or nulljava.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)
public static java.io.File getCacheFile(java.net.URL source, Version version)
source
- the source URLversion
- the version id of the local filejava.lang.IllegalArgumentException
- if the source is not cacheablepublic static java.lang.String getCacheParentDirectory(java.lang.String filePath)
path
- 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
public static void streamCopy(java.io.InputStream is, java.io.OutputStream os) throws java.io.IOException
java.io.IOException
public static java.io.File urlToPath(java.net.URL location, java.lang.String subdir)
location
- the urlsubdir
- the subdirectorypublic static void waitForResources(ApplicationInstance app, ResourceTracker tracker, java.net.URL[] resources, java.lang.String title)
tracker
- the resource trackerresources
- the resources to wait fortitle
- name of the downloadpublic static void cleanCache()
public static void lockFile(PropertiesFile properties)
properties
- Property file to lock.public static void unlockFile(PropertiesFile properties)
properties
- Property file to unlock.