Class FileSessionDataStore

java.lang.Object

org.eclipse.jetty.util.component.AbstractLifeCycle

org.eclipse.jetty.util.component.ContainerLifeCycle

org.eclipse.jetty.server.session.AbstractSessionDataStore

org.eclipse.jetty.server.session.FileSessionDataStore

All Implemented Interfaces:

SessionDataMap, SessionDataStore, Container, Destroyable, Dumpable, Dumpable.DumpableContainer, LifeCycle

@ManagedObject
public class FileSessionDataStore
extends AbstractSessionDataStore

FileSessionDataStore A file-based store of session data.

Nested Class Summary

Nested classes/interfaces inherited from class AbstractLifeCycle

AbstractLifeCycle.AbstractLifeCycleListener

Nested classes/interfaces inherited from interface Container

Container.InheritedListener, Container.Listener

Nested classes/interfaces inherited from interface Dumpable

Dumpable.DumpableContainer

Nested classes/interfaces inherited from interface LifeCycle

LifeCycle.Listener

Field Summary

Fields

Modifier and Type	Field	Description
protected String	_contextString
protected boolean	_deleteUnrestorableFiles
protected long	_lastSweepTime
protected Map<String,String>	_sessionFileMap
protected File	_storeDir
private static final Logger	LOG

Fields inherited from class AbstractSessionDataStore

_context, _gracePeriodSec, _lastExpiryCheckTime, _savePeriodSec

Fields inherited from class AbstractLifeCycle

FAILED, RUNNING, STARTED, STARTING, STOPPED, STOPPING

Fields inherited from interface Dumpable

KEY

Constructor Summary

Constructors

Constructor	Description
FileSessionDataStore()

Method Summary

Modifier and Type	Method	Description
boolean	delete(String id)	Delete a session
boolean	deleteFile(String filename)	Delete the file associated with a session
Set<String>	doGetExpired(Set<String> candidates)	Check to see which sessions have expired.
SessionData	doLoad(String id)	Load the session from persistent store.
protected void	doStart()	Starts the managed lifecycle beans in the order they were added.
protected void	doStop()	Stops the managed lifecycle beans in the reverse order they were added.
void	doStore(String id, SessionData data, long lastSaveTime)	Store the session data persistently.
boolean	exists(String id)	Test if data exists for a given session id.
protected String	getContextFromFilename(String filename)
protected long	getExpiryFromFilename(String filename)
protected String	getIdFromFilename(String filename)
protected String	getIdWithContext(String id)	Get the session id with its context.
protected String	getIdWithContextAndExpiry(SessionData data)	Get the session id with its context and its expiry time
protected String	getIdWithContextFromFilename(String filename)	Extract the session id and context from the filename
File	getStoreDir()
void	initialize(SessionContext context)	Initialize this data map for the given context.
void	initializeStore()	Read the names of the existing session files and build a map of fully qualified session ids (ie with context) to filename.
boolean	isDeleteUnrestorableFiles()
protected boolean	isOurContextSessionFilename(String filename)	Check if the filename matches our session pattern and is a session for our context.
boolean	isPassivating()	True if this type of datastore will passivate session objects
protected boolean	isSessionFilename(String filename)	Check if the filename is a session filename.
protected SessionData	load(InputStream is, String expectedId)	Load the session data from a file.
protected void	save(OutputStream os, String id, SessionData data)	Save the session data.
void	setDeleteUnrestorableFiles(boolean deleteUnrestorableFiles)
void	setStoreDir(File storeDir)
void	sweepDisk()	Check all session files that do not belong to this context and remove any that expired long ago (ie at least 5 gracePeriods ago).
void	sweepFile(long now, Path p)	Check to see if the expiry on the file is very old, and delete the file if so.
String	toString()

Methods inherited from class AbstractSessionDataStore

checkStarted, getExpired, getGracePeriodSec, getSavePeriodSec, load, newSessionData, setGracePeriodSec, setSavePeriodSec, store

Methods inherited from class ContainerLifeCycle

addBean, addBean, addEventListener, addManaged, contains, destroy, dump, dump, dump, dump, dump, dumpBeans, dumpObject, dumpObjects, dumpStdErr, dumpThis, getBean, getBeans, getBeans, getContainedBeans, getContainedBeans, isAuto, isManaged, isUnmanaged, manage, removeBean, removeBeans, removeEventListener, setBeans, setStopTimeout, start, stop, unmanage, updateBean, updateBean, updateBeans

Methods inherited from class AbstractLifeCycle

addLifeCycleListener, getState, getState, getStopTimeout, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, removeLifeCycleListener, start, stop

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface Dumpable

dumpSelf

Methods inherited from interface Dumpable.DumpableContainer

isDumpable

Methods inherited from interface LifeCycle

addLifeCycleListener, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, removeLifeCycleListener, start, stop

Field Details

LOG

private static final Logger LOG

_storeDir

protected File _storeDir

_deleteUnrestorableFiles

protected boolean _deleteUnrestorableFiles

_sessionFileMap

protected Map<String,String> _sessionFileMap

_contextString

protected String _contextString

_lastSweepTime

protected long _lastSweepTime

Constructor Details

FileSessionDataStore

public FileSessionDataStore()

Method Details

initialize

public void initialize(SessionContext context)
                throws Exception

Description copied from interface: SessionDataMap

Initialize this data map for the given context. A SessionDataMap can only be used by one context(/session manager).

Specified by:

initialize in interface SessionDataMap

Overrides:

initialize in class AbstractSessionDataStore

Parameters:

context - context associated

Throws:

Exception - if unable to initialize the

doStart

protected void doStart()
                throws Exception

Description copied from class: ContainerLifeCycle

Starts the managed lifecycle beans in the order they were added.

Overrides:

doStart in class AbstractSessionDataStore

Throws:

Exception

doStop

protected void doStop()
               throws Exception

Description copied from class: ContainerLifeCycle

Stops the managed lifecycle beans in the reverse order they were added.

Overrides:

doStop in class ContainerLifeCycle

Throws:

Exception

getStoreDir

@ManagedAttribute(value="dir where sessions are stored",
                  readonly=true)
public File getStoreDir()

setStoreDir

public void setStoreDir(File storeDir)

isDeleteUnrestorableFiles

public boolean isDeleteUnrestorableFiles()

setDeleteUnrestorableFiles

public void setDeleteUnrestorableFiles(boolean deleteUnrestorableFiles)

delete

public boolean delete(String id)
               throws Exception

Delete a session

Parameters:

id - session id

Returns:

true if the session was deleted

Throws:

Exception - if unable to delete session data

deleteFile

public boolean deleteFile(String filename)
                   throws Exception

Delete the file associated with a session

Parameters:

filename - name of the file containing the session's information

Returns:

true if file was deleted, false otherwise

Throws:

Exception - indicating delete failure

doGetExpired

public Set<String> doGetExpired(Set<String> candidates)

Check to see which sessions have expired.

Specified by:

doGetExpired in class AbstractSessionDataStore

Parameters:

candidates - the set of session ids that the SessionCache believes have expired

Returns:

the complete set of sessions that have expired, including those that are not currently loaded into the SessionCache

sweepDisk

public void sweepDisk()

Check all session files that do not belong to this context and remove any that expired long ago (ie at least 5 gracePeriods ago).

sweepFile

public void sweepFile(long now,
 Path p)

Check to see if the expiry on the file is very old, and delete the file if so. "Old" means that it expired at least 5 gracePeriods ago. The session can belong to any context.

Parameters:

now - the time now in msec

p - the file to check

doLoad

public SessionData doLoad(String id)
                   throws Exception

Description copied from class: AbstractSessionDataStore

Load the session from persistent store.

Specified by:

doLoad in class AbstractSessionDataStore

Parameters:

id - the id of the session to load

Returns:

the re-inflated session

Throws:

Exception - if unable to load the session

doStore

public void doStore(String id,
 SessionData data,
 long lastSaveTime)
             throws Exception

Description copied from class: AbstractSessionDataStore

Store the session data persistently.

Specified by:

doStore in class AbstractSessionDataStore

Parameters:

id - identity of session to store

data - info of the session

lastSaveTime - time of previous save or 0 if never saved

Throws:

Exception - if unable to store data

initializeStore

public void initializeStore()
                     throws Exception

Read the names of the existing session files and build a map of fully qualified session ids (ie with context) to filename. If there is more than one file for the same session, only the most recently modified will be kept and the rest deleted. At the same time, any files - for any context - that expired a long time ago will be cleaned up.

Throws:

Exception - if storeDir doesn't exist, isn't readable/writeable or contains 2 files with the same lastmodify time for the same session. Throws IOException if the lastmodifytimes can't be read.

isPassivating

@ManagedAttribute(value="are sessions serialized by this store",
                  readonly=true)
public boolean isPassivating()

Description copied from interface: SessionDataStore

True if this type of datastore will passivate session objects

Returns:

true if this store can passivate sessions, false otherwise

exists

public boolean exists(String id)
               throws Exception

Description copied from interface: SessionDataStore

Test if data exists for a given session id.

Parameters:

id - Identity of session whose existence should be checked

Returns:

true if valid, non-expired session exists

Throws:

Exception - if problem checking existence with persistence layer

save

protected void save(OutputStream os,
 String id,
 SessionData data)
             throws IOException

Save the session data.

Parameters:

os - the output stream to save to

id - identity of the session

data - the info of the session

Throws:

IOException

getIdWithContext

protected String getIdWithContext(String id)

Get the session id with its context.

Parameters:

id - identity of session

Returns:

the session id plus context

getIdWithContextAndExpiry

protected String getIdWithContextAndExpiry(SessionData data)

Get the session id with its context and its expiry time

Returns:

the session id plus context and expiry

getIdFromFilename

protected String getIdFromFilename(String filename)

getExpiryFromFilename

protected long getExpiryFromFilename(String filename)

getContextFromFilename

protected String getContextFromFilename(String filename)

getIdWithContextFromFilename

protected String getIdWithContextFromFilename(String filename)

Extract the session id and context from the filename

Parameters:

filename - the name of the file to use

Returns:

the session id plus context

isSessionFilename

protected boolean isSessionFilename(String filename)

Check if the filename is a session filename.

Parameters:

filename - the filename to check

Returns:

true if the filename has the correct filename format

isOurContextSessionFilename

protected boolean isOurContextSessionFilename(String filename)

Check if the filename matches our session pattern and is a session for our context.

Parameters:

filename - the filename to check

Returns:

true if the filename has the correct filename format and is for this context

load

protected SessionData load(InputStream is,
 String expectedId)
                    throws Exception

Load the session data from a file.

Parameters:

is - file input stream containing session data

expectedId - the id we've been told to load

Returns:

the session data

Throws:

Exception

toString

public String toString()

Overrides:

toString in class AbstractSessionDataStore