Java Doc for FileSystemPreferences.java in  » 6.0-JDK-Platform » solaris » java » util » prefs » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Platform » solaris » java.util.prefs   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    java.util.prefs.Preferences       java.util.prefs.AbstractPreferences          java.util.prefs.FileSystemPreferences FileSystemPreferences class FileSystemPreferences extends AbstractPreferences (Code) Preferences implementation for Unix. Preferences are stored in the file system, with one directory per preferences node. All of the preferences at each node are stored in a single file. Atomic file system operations (e.g. File.renameTo) are used to ensure integrity. An in-memory cache of the "explored" portion of the tree is maintained for performance, and written back to the disk periodically. File-locking is used to ensure reasonable behavior when multiple VMs are running at the same time. (The file lock is obtained only for sync(), flush() and removeNode().) author:    Josh Bloch version:    1.27, 05/05/07 See Also:   Preferences since:    1.4 Field Summary final  List changeLog      A list of all uncommitted preference changes.  NodeCreate nodeCreate      NodeCreate object for this node. static  File systemLockFile      The lock file for the system tree. static  Preferences systemRoot      The system root. static  File userLockFile      The lock file for the user tree. static  Preferences userRoot      The user root. Method Summary protected  AbstractPreferences childSpi(String name)      protected  String[] childrenNamesSpi()      public  void flush()      protected  void flushSpi()      protected  String getSpi(String key)      static synchronized  Preferences getSystemRoot()      static synchronized  Preferences getUserRoot()      public  boolean isUserNode()      protected  String[] keysSpi()      protected  void putSpi(String key, String value)      public  void removeNode()      protected  void removeNodeSpi()      Called with file lock held (in addition to node locks). protected  void removeSpi(String key)      public synchronized  void sync()      protected  void syncSpi()      Field Detail changeLog final List changeLog(Code) A list of all uncommitted preference changes. The elements in this list are of type PrefChange. If this node is concurrently modified on disk by another VM, the two sets of changes are merged when this node is sync'ed by overwriting our prefsCache with the preference map last written out to disk (by the other VM), and then replaying this change log against that map. The resulting map is then written back to the disk. nodeCreate NodeCreate nodeCreate(Code) NodeCreate object for this node. systemLockFile static File systemLockFile(Code) The lock file for the system tree. systemRoot static Preferences systemRoot(Code) The system root. userLockFile static File userLockFile(Code) The lock file for the user tree. userRoot static Preferences userRoot(Code) The user root. Method Detail childSpi protected AbstractPreferences childSpi(String name)(Code) childrenNamesSpi protected String[] childrenNamesSpi()(Code) flush public void flush() throws BackingStoreException(Code) flushSpi protected void flushSpi() throws BackingStoreException(Code) getSpi protected String getSpi(String key)(Code) getSystemRoot static synchronized Preferences getSystemRoot()(Code) getUserRoot static synchronized Preferences getUserRoot()(Code) isUserNode public boolean isUserNode()(Code) keysSpi protected String[] keysSpi()(Code) putSpi protected void putSpi(String key, String value)(Code) removeNode public void removeNode() throws BackingStoreException(Code) removeNodeSpi protected void removeNodeSpi() throws BackingStoreException(Code) Called with file lock held (in addition to node locks). removeSpi protected void removeSpi(String key)(Code) sync public synchronized void sync() throws BackingStoreException(Code) syncSpi protected void syncSpi() throws BackingStoreException(Code) Fields inherited from java.util.prefs.AbstractPreferences final protected Object lock(Code)(Java Doc) protected boolean newNode(Code)(Java Doc) final AbstractPreferences parent(Code)(Java Doc) Methods inherited from java.util.prefs.AbstractPreferences public String absolutePath()(Code)(Java Doc) public void addNodeChangeListener(NodeChangeListener ncl)(Code)(Java Doc) public void addPreferenceChangeListener(PreferenceChangeListener pcl)(Code)(Java Doc) final protected AbstractPreferences[] cachedChildren()(Code)(Java Doc) abstract protected AbstractPreferences childSpi(String name)(Code)(Java Doc) public String[] childrenNames() throws BackingStoreException(Code)(Java Doc) abstract protected String[] childrenNamesSpi() throws BackingStoreException(Code)(Java Doc) public void clear() throws BackingStoreException(Code)(Java Doc) public void exportNode(OutputStream os) throws IOException, BackingStoreException(Code)(Java Doc) public void exportSubtree(OutputStream os) throws IOException, BackingStoreException(Code)(Java Doc) public void flush() throws BackingStoreException(Code)(Java Doc) abstract protected void flushSpi() throws BackingStoreException(Code)(Java Doc) public String get(String key, String def)(Code)(Java Doc) public boolean getBoolean(String key, boolean def)(Code)(Java Doc) public byte[] getByteArray(String key, byte[] def)(Code)(Java Doc) protected AbstractPreferences getChild(String nodeName) throws BackingStoreException(Code)(Java Doc) public double getDouble(String key, double def)(Code)(Java Doc) public float getFloat(String key, float def)(Code)(Java Doc) public int getInt(String key, int def)(Code)(Java Doc) public long getLong(String key, long def)(Code)(Java Doc) abstract protected String getSpi(String key)(Code)(Java Doc) protected boolean isRemoved()(Code)(Java Doc) public boolean isUserNode()(Code)(Java Doc) public String[] keys() throws BackingStoreException(Code)(Java Doc) abstract protected String[] keysSpi() throws BackingStoreException(Code)(Java Doc) public String name()(Code)(Java Doc) public Preferences node(String path)(Code)(Java Doc) public boolean nodeExists(String path) throws BackingStoreException(Code)(Java Doc) NodeChangeListener[] nodeListeners()(Code)(Java Doc) public Preferences parent()(Code)(Java Doc) PreferenceChangeListener[] prefListeners()(Code)(Java Doc) public void put(String key, String value)(Code)(Java Doc) public void putBoolean(String key, boolean value)(Code)(Java Doc) public void putByteArray(String key, byte[] value)(Code)(Java Doc) public void putDouble(String key, double value)(Code)(Java Doc) public void putFloat(String key, float value)(Code)(Java Doc) public void putInt(String key, int value)(Code)(Java Doc) public void putLong(String key, long value)(Code)(Java Doc) abstract protected void putSpi(String key, String value)(Code)(Java Doc) public void remove(String key)(Code)(Java Doc) public void removeNode() throws BackingStoreException(Code)(Java Doc) public void removeNodeChangeListener(NodeChangeListener ncl)(Code)(Java Doc) abstract protected void removeNodeSpi() throws BackingStoreException(Code)(Java Doc) public void removePreferenceChangeListener(PreferenceChangeListener pcl)(Code)(Java Doc) abstract protected void removeSpi(String key)(Code)(Java Doc) public void sync() throws BackingStoreException(Code)(Java Doc) abstract protected void syncSpi() throws BackingStoreException(Code)(Java Doc) public String toString()(Code)(Java Doc) Fields inherited from java.util.prefs.Preferences final public static int MAX_KEY_LENGTH(Code)(Java Doc) final public static int MAX_NAME_LENGTH(Code)(Java Doc) final public static int MAX_VALUE_LENGTH(Code)(Java Doc) Methods inherited from java.util.prefs.Preferences abstract public String absolutePath()(Code)(Java Doc) abstract public void addNodeChangeListener(NodeChangeListener ncl)(Code)(Java Doc) abstract public void addPreferenceChangeListener(PreferenceChangeListener pcl)(Code)(Java Doc) abstract public String[] childrenNames() throws BackingStoreException(Code)(Java Doc) abstract public void clear() throws BackingStoreException(Code)(Java Doc) abstract public void exportNode(OutputStream os) throws IOException, BackingStoreException(Code)(Java Doc) abstract public void exportSubtree(OutputStream os) throws IOException, BackingStoreException(Code)(Java Doc) abstract public void flush() throws BackingStoreException(Code)(Java Doc) abstract public String get(String key, String def)(Code)(Java Doc) abstract public boolean getBoolean(String key, boolean def)(Code)(Java Doc) abstract public byte[] getByteArray(String key, byte[] def)(Code)(Java Doc) abstract public double getDouble(String key, double def)(Code)(Java Doc) abstract public float getFloat(String key, float def)(Code)(Java Doc) abstract public int getInt(String key, int def)(Code)(Java Doc) abstract public long getLong(String key, long def)(Code)(Java Doc) public static void importPreferences(InputStream is) throws IOException, InvalidPreferencesFormatException(Code)(Java Doc) abstract public boolean isUserNode()(Code)(Java Doc) abstract public String[] keys() throws BackingStoreException(Code)(Java Doc) abstract public String name()(Code)(Java Doc) abstract public Preferences node(String pathName)(Code)(Java Doc) abstract public boolean nodeExists(String pathName) throws BackingStoreException(Code)(Java Doc) abstract public Preferences parent()(Code)(Java Doc) abstract public void put(String key, String value)(Code)(Java Doc) abstract public void putBoolean(String key, boolean value)(Code)(Java Doc) abstract public void putByteArray(String key, byte[] value)(Code)(Java Doc) abstract public void putDouble(String key, double value)(Code)(Java Doc) abstract public void putFloat(String key, float value)(Code)(Java Doc) abstract public void putInt(String key, int value)(Code)(Java Doc) abstract public void putLong(String key, long value)(Code)(Java Doc) abstract public void remove(String key)(Code)(Java Doc) abstract public void removeNode() throws BackingStoreException(Code)(Java Doc) abstract public void removeNodeChangeListener(NodeChangeListener ncl)(Code)(Java Doc) abstract public void removePreferenceChangeListener(PreferenceChangeListener pcl)(Code)(Java Doc) abstract public void sync() throws BackingStoreException(Code)(Java Doc) public static Preferences systemNodeForPackage(Class c)(Code)(Java Doc) public static Preferences systemRoot()(Code)(Java Doc) abstract public String toString()(Code)(Java Doc) public static Preferences userNodeForPackage(Class c)(Code)(Java Doc) public static Preferences userRoot()(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)