Package io.vertx.ext.web.sstore

Class AbstractSession

java.lang.Object

io.vertx.ext.web.sstore.AbstractSession

All Implemented Interfaces:

Session, io.vertx.ext.web.sstore.impl.SessionInternal

public abstract class AbstractSession
extends Object
implements Session, io.vertx.ext.web.sstore.impl.SessionInternal

The abstract session class provides a barebones implementation for session storage implementors. This class will contain all the related data required for a session plus a couple of helper methods to verify the integrity and versioning of the data. This checksum is important to reduce the amount of times data is pushed to be stored on a backend. As a Vert.x Web user, you should not have to deal with this class directly but with the public interface that it implements.

Author:

Paulo Lopes

Constructor Summary

Constructors

Constructor	Description
AbstractSession()	This constructor is mandatory (even though not referenced anywhere) is required for serialization purposes.
AbstractSession(VertxContextPRNG random)
AbstractSession(VertxContextPRNG random, long timeout, int length)

Method Summary

Modifier and Type	Method	Description
protected int	checksum()
Session	computeIfAbsent(String key, java.util.function.Function<String,Object> mappingFunction)	Put some data in a session if absent.
protected int	crc()
Map<String,Object>	data()
void	destroy()	Destroy the session
void	flushed(boolean skipCrc)	Mark this session as flushed, this gives the object a change to clear any state management flags.
<T> T	get(String key)	Get some data from the session
String	id()
void	incrementVersion()
boolean	isDestroyed()
boolean	isEmpty()
boolean	isRegenerated()
long	lastAccessed()
String	oldId()
Session	put(String key, Object obj)	Put some data in a session
Session	putIfAbsent(String key, Object obj)	Put some data in a session if absent
protected int	readDataFromBuffer(int pos, Buffer buffer)
protected void	readDataFromBuffer(Buffer buffer)
Session	regenerateId()
<T> T	remove(String key)	Remove some data from the session
void	setAccessed()	Mark the session as being accessed.
protected void	setData(JsonObject data)
protected void	setData(Map<String,Object> data)
protected void	setId(String id)
protected void	setLastAccessed(long lastAccessed)
void	setPRNG(VertxContextPRNG prng)
protected void	setTimeout(long timeout)
protected void	setVersion(int version)
long	timeout()
int	version()
protected void	writeDataToBuffer(Buffer buffer)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.vertx.ext.web.Session

value

Constructor Detail

AbstractSession

public AbstractSession()

This constructor is mandatory (even though not referenced anywhere) is required for serialization purposes. Do not remove. It is required as part of the contract of the ClusterSerializable interface which some implementations might require.

AbstractSession

public AbstractSession(VertxContextPRNG random)

AbstractSession

public AbstractSession(VertxContextPRNG random,
                       long timeout,
                       int length)

Method Detail

setId

protected void setId(String id)

setTimeout

protected void setTimeout(long timeout)

setData

protected void setData(Map<String,Object> data)

setData

protected void setData(JsonObject data)

setLastAccessed

protected void setLastAccessed(long lastAccessed)

setVersion

protected void setVersion(int version)

setPRNG

public void setPRNG(VertxContextPRNG prng)

flushed

public void flushed(boolean skipCrc)

Description copied from interface: io.vertx.ext.web.sstore.impl.SessionInternal

Mark this session as flushed, this gives the object a change to clear any state management flags.

Specified by:

flushed in interface io.vertx.ext.web.sstore.impl.SessionInternal

Parameters:

skipCrc - if the intention is NOT to keep using the session after this call, a small optimization can be performed (skip updating the internal CRC) which is unnecessary.

id

public String id()

Specified by:

id in interface Session

Returns:

The unique ID of the session. This is generated using a random secure UUID.

regenerateId

public Session regenerateId()

Specified by:

regenerateId in interface Session

Returns:

The new unique ID of the session.

timeout

public long timeout()

Specified by:

timeout in interface Session

Returns:

the amount of time in ms, after which the session will expire, if not accessed.

get

public <T> T get(String key)

Description copied from interface: Session

Get some data from the session

Specified by:

get in interface Session

Parameters:

key - the key of the data

Returns:

the data

put

public Session put(String key,
                   Object obj)

Description copied from interface: Session

Put some data in a session

Specified by:

put in interface Session

Parameters:

key - the key for the data

obj - the data

Returns:

a reference to this, so the API can be used fluently

putIfAbsent

public Session putIfAbsent(String key,
                           Object obj)

Description copied from interface: Session

Put some data in a session if absent

Specified by:

putIfAbsent in interface Session

Parameters:

key - the key for the data

obj - the data

Returns:

a reference to this, so the API can be used fluently

computeIfAbsent

public Session computeIfAbsent(String key,
                               java.util.function.Function<String,Object> mappingFunction)

Description copied from interface: Session

Put some data in a session if absent. If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.

Specified by:

computeIfAbsent in interface Session

Parameters:

key - the key for the data

mappingFunction - a mapping function

Returns:

a reference to this, so the API can be used fluently

remove

public <T> T remove(String key)

Description copied from interface: Session

Remove some data from the session

Specified by:

remove in interface Session

Parameters:

key - the key of the data

Returns:

the data that was there or null if none there

data

public Map<String,Object> data()

Specified by:

data in interface Session

Returns:

the session data as a map

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Session

Returns:

true if the session has data

lastAccessed

public long lastAccessed()

Specified by:

lastAccessed in interface Session

Returns:

the time the session was last accessed

setAccessed

public void setAccessed()

Description copied from interface: Session

Mark the session as being accessed.

Specified by:

setAccessed in interface Session

destroy

public void destroy()

Description copied from interface: Session

Destroy the session

Specified by:

destroy in interface Session

isDestroyed

public boolean isDestroyed()

Specified by:

isDestroyed in interface Session

Returns:

has the session been destroyed?

isRegenerated

public boolean isRegenerated()

Specified by:

isRegenerated in interface Session

Returns:

has the session been renewed?

oldId

public String oldId()

Specified by:

oldId in interface Session

Returns:

old ID if renewed

version

public int version()

incrementVersion

public void incrementVersion()

crc

protected int crc()

checksum

protected int checksum()

writeDataToBuffer

protected void writeDataToBuffer(Buffer buffer)

readDataFromBuffer

protected int readDataFromBuffer(int pos,
                                 Buffer buffer)

readDataFromBuffer

protected void readDataFromBuffer(Buffer buffer)