org.jboss.msc.value

Interface Value<T>

Type Parameters:

T - the value type

All Known Subinterfaces:

Service<T>, ServiceController<S>, SingletonService<T>

All Known Implementing Classes:

AbstractService, CachedValue, CheckedValue, ClassOfValue, ConstructedValue, DefaultValue, EnvironmentPropertyValue, FieldValue, ImmediateValue, InjectedSetValue, InjectedValue, ListItemValue, ListValue, MapEntryValue, MapItemValue, MapValue, MethodValue, ReferenceValue, SetValue, SystemPropertyValue, ThreadLocalValue, ValueInjectionService, ValueService

public interface Value<T>

An indirect value. A value may be available trivially (without any computation), or it may involve a complex calculation to produce. The value may also be time-sensitive, such that it is only available under certain circumstances (e.g. when the corresponding service is "up").

Author:

David M. Lloyd

Method Summary

Modifier and Type	Method and Description
T	getValue() Get the actual value.

Method Detail

getValue

T getValue()
    throws IllegalStateException,
           IllegalArgumentException

Get the actual value.

Returns:

the actual value

Throws:

IllegalStateException - if the value is time-sensitive and the current state does not allow retrieval.

IllegalArgumentException - when the value cannot be read due to misconfiguration