Package com.ibm.fhir.persistence.jdbc.cache

Class CommonTokenValuesCacheImpl

java.lang.Object

com.ibm.fhir.persistence.jdbc.cache.CommonTokenValuesCacheImpl

All Implemented Interfaces:

ICommonTokenValuesCache

public class CommonTokenValuesCacheImpl
extends Object
implements ICommonTokenValuesCache

Implementation of a cache used for lookups of entities related to local and external resource references

Constructor Summary

Constructors

Constructor	Description
CommonTokenValuesCacheImpl(int codeSystemCacheSize, int tokenValueCacheSize)	Public constructor

Method Summary

Modifier and Type	Method	Description
void	addCodeSystem(String codeSystem, int id)	Add the id to the local cache
void	addTokenValue(CommonTokenValue key, long id)	Add the CommonTokenValue and id to the local cache
void	clearLocalMaps()	Clear any thread-local cache maps (probably because a transaction was rolled back)
Integer	getCodeSystemId(String codeSystem)	Look up the id of the named codeSystem
void	prefillCodeSystems(Map<String,Integer> codeSystems)	Add the contents of the given codeSystems map to the shared cache.
void	reset()	Clear the thread-local and shared caches (for test purposes)
void	resolveCodeSystems(Collection<ResourceTokenValueRec> tokenValues, List<ResourceTokenValueRec> misses)	Lookup all the database values we have cached for the code-system names in the given collection.
void	resolveTokenValues(Collection<ResourceTokenValueRec> tokenValues, List<ResourceTokenValueRec> misses)	Look up the ids for the common token values.
void	updateSharedMaps()	Called after a transaction commit() to transfer all the staged (thread-local) data over to the shared LRU cache.

Methods inherited from class java.lang.Object

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

Constructor Detail

CommonTokenValuesCacheImpl

public CommonTokenValuesCacheImpl(int codeSystemCacheSize,
                                  int tokenValueCacheSize)

Public constructor

Parameters:

sharedExternalSystemNameCacheSize -

Method Detail

updateSharedMaps

public void updateSharedMaps()

Called after a transaction commit() to transfer all the staged (thread-local) data over to the shared LRU cache.

Specified by:

updateSharedMaps in interface ICommonTokenValuesCache

getCodeSystemId

public Integer getCodeSystemId(String codeSystem)

Description copied from interface: ICommonTokenValuesCache

Look up the id of the named codeSystem

Specified by:

getCodeSystemId in interface ICommonTokenValuesCache

Returns:

the database identity of the code system, or null if no record was found

resolveCodeSystems

public void resolveCodeSystems(Collection<ResourceTokenValueRec> tokenValues,
                               List<ResourceTokenValueRec> misses)

Description copied from interface: ICommonTokenValuesCache

Lookup all the database values we have cached for the code-system names in the given collection. Put any objects with cache misses into the corresponding miss lists (so that we know which records we need to generate inserts for)

Specified by:

resolveCodeSystems in interface ICommonTokenValuesCache

misses - the objects we couldn't find in the cache

resolveTokenValues

public void resolveTokenValues(Collection<ResourceTokenValueRec> tokenValues,
                               List<ResourceTokenValueRec> misses)

Description copied from interface: ICommonTokenValuesCache

Look up the ids for the common token values. Must be preceded by resolveCodeSystems to make sure we have code-system ids set for each record. This also means that code-systems which don't yet exist must be created before this method can be called (because we need the id)

Specified by:

resolveTokenValues in interface ICommonTokenValuesCache

addCodeSystem

public void addCodeSystem(String codeSystem,
                          int id)

Description copied from interface: ICommonTokenValuesCache

Add the id to the local cache

Specified by:

addCodeSystem in interface ICommonTokenValuesCache

addTokenValue

public void addTokenValue(CommonTokenValue key,
                          long id)

Description copied from interface: ICommonTokenValuesCache

Add the CommonTokenValue and id to the local cache

Specified by:

addTokenValue in interface ICommonTokenValuesCache

reset

public void reset()

Description copied from interface: ICommonTokenValuesCache

Clear the thread-local and shared caches (for test purposes)

Specified by:

reset in interface ICommonTokenValuesCache

clearLocalMaps

public void clearLocalMaps()

Description copied from interface: ICommonTokenValuesCache

Clear any thread-local cache maps (probably because a transaction was rolled back)

Specified by:

clearLocalMaps in interface ICommonTokenValuesCache

prefillCodeSystems

public void prefillCodeSystems(Map<String,Integer> codeSystems)

Description copied from interface: ICommonTokenValuesCache

Add the contents of the given codeSystems map to the shared cache. It is assumed that all of these ids are already committed in the database, not newly inserted as part of the current transaction.

Specified by:

prefillCodeSystems in interface ICommonTokenValuesCache