Session (api 2.1.12 API)

All Known Implementing Classes:

StandardSession
```
public interface Session
```
Created by Zhenjie Yan on 2018/7/13.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`java.lang.Object`	`getAttribute(java.lang.String name)` Returns the object bound with the specified name in this session, or `null` if no object is bound under the name.
`java.util.Enumeration<java.lang.String>`	`getAttributeNames()` Returns an `Enumeration` of `String` objects containing the names of all the objects bound to this session.
`long`	`getCreatedTime()` Returns the time when this session was created, measured in milliseconds since midnight January 1, 1970 GMT.
`java.lang.String`	`getId()` Returns a string containing the unique identifier assigned to this session.
`long`	`getLastAccessedTime()` Returns the last time the client sent a request associated with this session, as the number of milliseconds since midnight January 1, 1970 GMT, and marked by the time the container received the request.
`int`	`getMaxInactiveInterval()` Returns the maximum time interval, in seconds, that the server will keep this session open between client accesses.
`void`	`invalidate()` Invalidates this session then unbinds any objects bound to it.
`boolean`	`isNew()` Returns `true` if the client does not yet know about the session or if the client chooses not to join the session.
`boolean`	`isValid()`
`void`	`removeAttribute(java.lang.String name)` Removes the object bound with the specified name from this session.
`void`	`setAttribute(java.lang.String name, java.lang.Object value)` Binds an object to this session, using the name specified.
`void`	`setMaxInactiveInterval(int interval)` Specifies the time, in seconds, between client requests before the server will invalidate this session.

- Method Detail
  - getId
```
java.lang.String getId()
```
    Returns a string containing the unique identifier assigned to this session.
  - getCreatedTime
```
long getCreatedTime()
```
    Returns the time when this session was created, measured in milliseconds since midnight January 1, 1970 GMT.
  - getLastAccessedTime
```
long getLastAccessedTime()
```
    Returns the last time the client sent a request associated with this session, as the number of milliseconds since midnight January 1, 1970 GMT, and marked by the time the container received the request.
    Actions that your application takes, such as getting or setting a value associated with the session, do not affect the access time.
  - setMaxInactiveInterval
```
void setMaxInactiveInterval(int interval)
```
    Specifies the time, in seconds, between client requests before the server will invalidate this session.
    An interval value of zero or less indicates that the session should never timeout.
    
    Parameters:
    
    interval - an integer specifying the number of seconds.
  - getMaxInactiveInterval
```
int getMaxInactiveInterval()
```
    Returns the maximum time interval, in seconds, that the server will keep this session open between client accesses. After this interval, the server will invalidate the session. The maximum time interval can be set with the setMaxInactiveInterval(int) method.
    A return value of zero or less indicates that the session will never timeout.
  - getAttribute
```
java.lang.Object getAttribute(java.lang.String name)
```
    Returns the object bound with the specified name in this session, or null if no object is bound under the name.
    
    Parameters:
    
    name - a string specifying the name of the object.
  - getAttributeNames
```
java.util.Enumeration<java.lang.String> getAttributeNames()
```
    Returns an Enumeration of String objects containing the names of all the objects bound to this session.
  - setAttribute
```
void setAttribute(java.lang.String name,
                  java.lang.Object value)
```
    Binds an object to this session, using the name specified. If an object of the same name is already bound to the session, the object is replaced.
    If the value passed in is null, this has the same effect as calling removeAttribute(String).
    
    Parameters:
    
    name - the name to which the object is bound, cannot be null.
    
    value - the object to be bound.
  - removeAttribute
```
void removeAttribute(java.lang.String name)
```
    Removes the object bound with the specified name from this session. If the session does not have an object bound with the specified name, this method does nothing.
    
    Parameters:
    
    name - the name of the object to remove from this session.
  - invalidate
```
void invalidate()
```
    Invalidates this session then unbinds any objects bound to it.
  - isNew
```
boolean isNew()
```
    Returns true if the client does not yet know about the session or if the client chooses not to join the session. E.g. if the server used only cookie-based sessions, and the client had disabled the use of cookies, then a session would be new on each request.
    
    Returns:
    
    true if the server has created a session, but the client has not yet joined.
  - isValid
```
boolean isValid()
```
    Returns:
    
    returns true is the session is valid, or false if the session is invalid.

Interface Session

Method Summary

Method Detail

getId

getCreatedTime

getLastAccessedTime

setMaxInactiveInterval

getMaxInactiveInterval

getAttribute

getAttributeNames

setAttribute

removeAttribute

invalidate

isNew

isValid