schema

Class LoginSummary

java.lang.Object

schema.LoginSummary

 class LoginSummary
extends Object

Holds the session summary attributes that are stored as the Value for the "/user/EMAIL/-/login" Key. Illustrates the use of a Key/Value pair for a parent (non-leaf) Key.

In general, be aware that there are performance trade-offs in storing summary data, as shown in this example, versus computing it using a query when it is needed. For example, we could avoid storing totalLoginCount and get the count of events efficiently using a range query on the keys. But we would still need to maintain the totalLoginDuration if we wanted to avoid accessing each LoginSession to sum the individual values on demand. In some cases, summary data may be expensive enough to recompute that it's worth storing. This is a trade-off that application designers need to make based upon their knowledge of application access patterns.

Constructor Summary

Constructors

Constructor and Description
LoginSummary(String email) Constructs a user object with its unique identifier, the email address.

Method Summary

Methods

Modifier and Type	Method and Description
(package private) String	getEmail() Returns the email identifier.
(package private) Key	getStoreKey() Returns a Key that can be used to write or read the LoginSummary.
(package private) Value	getStoreValue(Bindings bindings) Serializes the summary attributes into the byte array of a Value.
(package private) int	getTotalLoginCount() Returns the total login count.
(package private) long	getTotalLoginDuration() Returns the total login duration.
(package private) void	setStoreValue(Bindings bindings, Value value) Deserializes the summary attributes from the byte array of a Value.
(package private) void	setTotalLoginCount(int totalLoginCount) Changes the total login count.
(package private) void	setTotalLoginDuration(long totalLoginDuration) Changes the total login duration.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

LoginSummary

LoginSummary(String email)

Constructs a user object with its unique identifier, the email address.

Method Detail

getEmail

String getEmail()

Returns the email identifier.

setTotalLoginCount

void setTotalLoginCount(int totalLoginCount)

Changes the total login count.

getTotalLoginCount

int getTotalLoginCount()

Returns the total login count.

setTotalLoginDuration

void setTotalLoginDuration(long totalLoginDuration)

Changes the total login duration.

getTotalLoginDuration

long getTotalLoginDuration()

Returns the total login duration.

getStoreKey

Key getStoreKey()

Returns a Key that can be used to write or read the LoginSummary.

getStoreValue

Value getStoreValue(Bindings bindings)

Serializes the summary attributes into the byte array of a Value.

setStoreValue

void setStoreValue(Bindings bindings,
                 Value value)

Deserializes the summary attributes from the byte array of a Value.

toString

public String toString()

Overrides:

toString in class Object