org.mule.runtime.api.metadata

Interface MetadataStorage

@NoImplement
public interface MetadataStorage

This component provides the capability to store data so future requests for that data can be served faster and accessed from every InputTypeResolver, TypeKeysResolver and OutputTypeResolver. It also allows to evict entries in case recalculations are needed.

Since:

1.5

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	MetadataStorage.MetadataStorageValueResolver

Method Summary

Modifier and Type	Method and Description
<T extends Serializable> T	computeIfAbsent(Serializable key, MetadataStorage.MetadataStorageValueResolver mappingFunction) If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map unless null.
boolean	evictEntry(Serializable key) Evicts the key in the storage.
<T extends Serializable> Optional<T>	get(Serializable key)
void	put(Serializable key, Serializable value) Associates the specified value with the specified key in the storage.
void	putAll(Map<? extends Serializable,? extends Serializable> values) Copies all of the entries from the specified map to the storage.

Method Detail

put

void put(Serializable key,
         Serializable value)

Associates the specified value with the specified key in the storage. if the storage previously contained a mapping for the specified key, the old value gets replaced

Parameters:

key - a key to associate the specified value

value - the value to persist in the storage

putAll

void putAll(Map<? extends Serializable,? extends Serializable> values)

Copies all of the entries from the specified map to the storage.

Parameters:

values - values to be stored in the storage

get

<T extends Serializable> Optional<T> get(Serializable key)

Parameters:

key - the key whose associated value is to be returned

Returns:

the value to which the specified key is mapped, or Option.empty() if this map contains no value for the specified key.

computeIfAbsent

<T extends Serializable> T computeIfAbsent(Serializable key,
                                           MetadataStorage.MetadataStorageValueResolver mappingFunction)
                                    throws MetadataResolvingException,
                                           ConnectionException

If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map unless null.

Parameters:

key - the key whose associated value is to be returned

Returns:

the current (existing or computed) value associated with the specified key, or null if the computed value is null

Throws:

MetadataResolvingException

ConnectionException

evictEntry

boolean evictEntry(Serializable key)

Evicts the key in the storage.

Returns:

true if the key was in the storage, false if not.