org.apache.hadoop.fs.azurebfs.utils

Class CachedSASToken

java.lang.Object

org.apache.hadoop.fs.azurebfs.utils.CachedSASToken

public final class CachedSASToken
extends Object

CachedSASToken provides simple utility for managing renewal of SAS tokens used by Input/OutputStream. This enables SAS re-use and reduces calls to the SASTokenProvider.

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
CachedSASToken() Create instance with default minimum expiration.
CachedSASToken(long minExpirationInSeconds) Create instance with specified minimum expiration.

Method Summary

Modifier and Type	Method and Description
String	get() Gets the token if still valid.
void	update(String token) Updates the cached SAS token and expiry.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

CachedSASToken

public CachedSASToken()

Create instance with default minimum expiration. SAS tokens are automatically renewed when their expiration is within this period.

CachedSASToken

public CachedSASToken(long minExpirationInSeconds)

Create instance with specified minimum expiration. SAS tokens are automatically renewed when their expiration is within this period.

Parameters:

minExpirationInSeconds -

Method Detail

update

public void update(String token)

Updates the cached SAS token and expiry. If the token is invalid, the cached value is cleared by setting it to null and the expiry to MIN.

Parameters:

token - an Azure Storage SAS token

get

public String get()

Gets the token if still valid.

Returns:

the token or null if it is expired or near sasExpiry.