Package org.hl7.fhir.validation.cli.services

Class SessionCache

java.lang.Object

org.hl7.fhir.validation.cli.services.SessionCache

public class SessionCache
extends Object

SessionCache for storing and retrieving ValidationEngine instances, so callers do not have to re-instantiate a new instance for each validation request.

Field Summary

Fields

Modifier and Type	Field	Description
protected static long	TIME_TO_LIVE
protected static TimeUnit	TIME_UNIT

Constructor Summary

Constructors

Constructor	Description
SessionCache()
SessionCache(long sessionLength, TimeUnit sessionLengthUnit)

Method Summary

Modifier and Type	Method	Description
String	cacheSession(String sessionId, ValidationEngine validationEngine)	Stores the initialized ValidationEngine in the cache with the passed in id as the key.
String	cacheSession(ValidationEngine validationEngine)	Stores the initialized ValidationEngine in the cache.
ValidationEngine	fetchSessionValidatorEngine(String sessionId)	Returns the stored ValidationEngine associated with the passed in session id, if one such instance exists.
Set<String>	getSessionIds()	Returns the set of stored session ids.
boolean	sessionExists(String sessionId)	Checks if the passed in String id exists in the set of stored session id.

Methods inherited from class java.lang.Object

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

Field Detail

TIME_TO_LIVE

protected static final long TIME_TO_LIVE

See Also:

Constant Field Values

TIME_UNIT

protected static final TimeUnit TIME_UNIT

Constructor Detail

SessionCache

public SessionCache()

SessionCache

public SessionCache(long sessionLength,
                    TimeUnit sessionLengthUnit)

Parameters:

sessionLength - the constant amount of time an entry is available before it expires. A negative value results in entries that NEVER expire. A zero value results in entries that ALWAYS expire.

sessionLengthUnit - the unit of time for the timeToLive parameter, must not be null

Method Detail

cacheSession

public String cacheSession(ValidationEngine validationEngine)

Stores the initialized ValidationEngine in the cache. Returns the session id that will be associated with this instance.

Parameters:

validationEngine - ValidationEngine

Returns:

The String id associated with the stored instance.

cacheSession

public String cacheSession(String sessionId,
                           ValidationEngine validationEngine)

Stores the initialized ValidationEngine in the cache with the passed in id as the key. If a null key is passed in, a new key is generated and returned.

Parameters:

sessionId - The String key to associate with this stored ValidationEngine

validationEngine - The ValidationEngine instance to cache.

Returns:

The String id that will be associated with the stored ValidationEngine

sessionExists

public boolean sessionExists(String sessionId)

Checks if the passed in String id exists in the set of stored session id.

Parameters:

sessionId - The String id to search for.

Returns:

Boolean.TRUE if such id exists.

fetchSessionValidatorEngine

public ValidationEngine fetchSessionValidatorEngine(String sessionId)

Returns the stored ValidationEngine associated with the passed in session id, if one such instance exists.

Parameters:

sessionId - The String session id.

Returns:

The ValidationEngine associated with the passed in id, or null if none exists.

getSessionIds

public Set<String> getSessionIds()

Returns the set of stored session ids.

Returns:

Set of session ids.