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java.lang.Objectnet.jxta.impl.cm.Cm
This class implements a limited document caching mechanism intended to provide cache for services that have a need for cache to search and exchange jxta documents. Only Core Services are intended to use this mechanism.
Field Summary | |
static long |
DEFAULT_GC_MAX_INTERVAL
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protected File |
rootDir
file descriptor for the root of the cm |
static File |
ROOTDIRBASE
the name we will use for the base directory |
Constructor Summary | |
Cm(String areaName,
boolean enableOptimize)
Constructor for cm |
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Cm(ThreadGroup threads,
String areaName,
boolean enableOptimize,
long gcinterval,
boolean trackDeltas)
Constructor for cm |
Method Summary | |
static String |
createTmpName(StructuredDocument doc)
Generates a random file name using doc hashcode |
void |
garbageCollect()
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Vector |
getDeltas(String dn)
returns all entries that are added since this method was last called |
Vector |
getEntries(String dn,
boolean clearDeltas)
returns all entries that are cached |
long |
getExpirationtime(String dn,
String fn)
Returns the maximum duration in milliseconds for which this document should cached by those other than the publisher. |
protected static IndexQuery |
getIndexQuery(String value)
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InputStream |
getInputStream(String dn,
String fn)
Returns the inputStream of a specified file, in a specified dir |
long |
getLifetime(String dn,
String fn)
Returns the relative time in milliseconds at which the file will expire. |
Vector |
getRecords(String dn,
int threshold,
Vector values,
Vector expirations)
Gets the list of all the files into the given folder |
Vector |
getRecords(String dn,
int threshold,
Vector values,
Vector expirations,
boolean purge)
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void |
remove(String dn,
String fn)
Remove a file |
StructuredDocument |
restore(String dn,
String fn)
Restore a saved StructuredDocument. |
byte[] |
restoreBytes(String dn,
String fn)
Restore an advetisement into a byte array. |
void |
run()
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void |
save(String dn,
String fn,
Advertisement adv)
Stores a StructuredDocument in specified dir, and file name |
void |
save(String dn,
String fn,
Advertisement adv,
long lifetime,
long expiration)
Stores a StructuredDocument in specified dir, and file name, and associated doc timeouts |
void |
save(String dn,
String fn,
byte[] data,
long lifetime,
long expiration)
Store some bytes in specified dir, and file name, and associated doc timeouts |
Vector |
search(String dn,
String attribute,
String value,
int threshold,
Vector expirations)
Search and recovers documents that contains at least a macthing pair of tag/value. |
void |
setTrackDeltas(boolean trackDeltas)
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void |
stop()
stop the cm |
String |
toString()
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Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
public static final File ROOTDIRBASE
public static final long DEFAULT_GC_MAX_INTERVAL
protected File rootDir
Constructor Detail |
public Cm(String areaName, boolean enableOptimize)
areaName
- the name of the cm sub-dir to createenableOptimize
- whether to enable indexing
NOTE: Default garbage interval once an hourpublic Cm(ThreadGroup threads, String areaName, boolean enableOptimize, long gcinterval, boolean trackDeltas)
areaName
- the name of the cm sub-dir to createenableOptimize
- whether to enable indexinggcinterval
- garbage collect max intervaltrackDeltas
- when true deltas are trackedMethod Detail |
public String toString()
public static String createTmpName(StructuredDocument doc)
doc
- to hash to generate a unique name
public Vector getRecords(String dn, int threshold, Vector values, Vector expirations)
dn
- contains the name of the folder
public Vector getRecords(String dn, int threshold, Vector values, Vector expirations, boolean purge)
public void garbageCollect()
public long getLifetime(String dn, String fn)
dn
- contains the name of the folderfn
- contains the name of the file
public long getExpirationtime(String dn, String fn)
dn
- contains the name of the folderfn
- contains the name of the file
public InputStream getInputStream(String dn, String fn) throws IOException
dn
- directory namefn
- file name
IOException
- if an I/O error occurspublic void remove(String dn, String fn) throws IOException
dn
- directory namefn
- file name
IOException
- if an I/O error occurspublic StructuredDocument restore(String dn, String fn) throws IOException
dn
- directory namefn
- file name
IOException
- if an I/O error occurs
was not possible.public byte[] restoreBytes(String dn, String fn) throws IOException
dn
- directory namefn
- file name
IOException
- if an I/O error occurspublic void save(String dn, String fn, Advertisement adv) throws IOException
dn
- directory namefn
- file nameadv
- Advertisement to store
IOException
- if an I/O error occurspublic void save(String dn, String fn, Advertisement adv, long lifetime, long expiration) throws IOException
dn
- directory namefn
- file nameadv
- Advertisement to saveexpiration
- document expiration time in mslifetime
- document lifetime in ms
IOException
- if an I/O error occurspublic void save(String dn, String fn, byte[] data, long lifetime, long expiration) throws IOException
dn
- directory namefn
- file namedata
- byte array to saveexpiration
- document expiration time in mslifetime
- document lifetime in ms
IOException
- if an I/O error occursprotected static IndexQuery getIndexQuery(String value)
public Vector search(String dn, String attribute, String value, int threshold, Vector expirations)
dn
- contains the name of the folder on which to
perform the searchvalue
- contains the value to search on.attribute
- attribute to search onthreshold
- threshold
public Vector getEntries(String dn, boolean clearDeltas)
dn
- the relative dir name
public Vector getDeltas(String dn)
dn
- the relative dir name
public void setTrackDeltas(boolean trackDeltas)
public void stop()
public void run()
run
in interface Runnable
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