Github user ahgittin commented on a diff in the pull request:
https://github.com/apache/brooklyn-server/pull/340#discussion_r80005137
--- Diff:
core/src/main/java/org/apache/brooklyn/core/config/internal/AbstractConfigMapImpl.java
---
@@ -107,4 +252,227 @@ public int size() {
public boolean isEmpty() {
return ownConfig.isEmpty();
}
+
+ protected ConfigInheritance getDefaultRuntimeInheritance() {
+ return BasicConfigInheritance.OVERWRITE;
+ }
+
+ public <T> ReferenceWithError<ConfigValueAtContainer<TContainer,T>>
getConfigAndContainer(ConfigKey<T> key) {
+ return getConfigImpl(key, false);
+ }
+
+ protected abstract TContainer getParentOfContainer(TContainer
container);
+
+ @Nullable protected final <T> ConfigKey<T>
getKeyAtContainer(TContainer container, ConfigKey<T> queryKey) {
+ if (container==null) return null;
+ @SuppressWarnings("unchecked")
+ ConfigKey<T> candidate = (ConfigKey<T>)
getKeyAtContainerImpl(container, queryKey);
+ return candidate;
+ }
+
+ @Nullable protected abstract <T> ConfigKey<?>
getKeyAtContainerImpl(@Nonnull TContainer container, ConfigKey<T> queryKey);
+
+ protected Maybe<Object> getRawValueAtContainer(TContainer container,
ConfigKey<? extends Object> configKey) {
+ return
((BrooklynObjectInternal)container).config().getInternalConfigMap().getConfigLocalRaw(configKey);
+ }
+ protected Maybe<Object> resolveRawValueFromContainer(TContainer
container, ConfigKey<?> key, Object value) {
+ Map<ConfigKey<?>, Object> oc = ((AbstractConfigMapImpl<?>)
((BrooklynObjectInternal)container).config().getInternalConfigMap()).ownConfig;
+ if (key instanceof ConfigKeySelfExtracting) {
+ if (((ConfigKeySelfExtracting<?>)key).isSet(oc)) {
+ Map<ConfigKey<?>, ?> ownCopy;
+ synchronized (oc) {
+ // wasteful to make a copy to look up; maybe try once
opportunistically?
+ ownCopy = MutableMap.copyOf(oc);
+ }
+ return Maybe.of((Object) ((ConfigKeySelfExtracting<?>)
key).extractValue(ownCopy, getExecutionContext(container)) );
+ } else {
+ return Maybe.absent();
+ }
+ } else {
+ // all our keys are self-extracting
+ LOG.warn("Unexpected key type "+key+" ("+key.getClass()+") in
"+bo+"; ignoring value");
+ return Maybe.absent();
+ }
+ }
+
+ @SuppressWarnings("unchecked")
+ protected <T> T coerce(Object value, Class<T> type) {
+ if (type==null || value==null) return (T) value;
+ return (T) TypeCoercions.coerce(value, type);
+ }
+
+ protected <T> ReferenceWithError<ConfigValueAtContainer<TContainer,T>>
getConfigImpl(final ConfigKey<T> queryKey, final boolean raw) {
+ // In case this entity class has overridden the given key (e.g. to
set default), then retrieve this entity's key
+ Function<TContainer, ConfigKey<T>> keyFn = new
Function<TContainer, ConfigKey<T>>() {
+ @Override public ConfigKey<T> apply(TContainer input) {
+ // should return null if the key is not known, to indicate
selected inheritance rules from base key should take effect
+ return getKeyAtContainer(input, queryKey);
+ }
+ };
+ ConfigKey<T> ownKey = keyFn.apply(getContainer());
+ if (ownKey==null) ownKey = queryKey;
+ @SuppressWarnings("unchecked")
+ final Class<T> type = (Class<T>) ownKey.getType();
+
+ // takes type of own key (or query key if own key not available)
+ // takes default of own key if available and has default, else of
query key
+
+ Function<Maybe<Object>, Maybe<T>> coerceFn = new
Function<Maybe<Object>, Maybe<T>>() {
+ @SuppressWarnings("unchecked") @Override public Maybe<T>
apply(Maybe<Object> input) {
+ if (raw || input==null || input.isAbsent()) return
(Maybe<T>)input;
+ return Maybe.ofAllowingNull(coerce(input.get(), type));
+ }
+ };
+ // prefer default and type of ownKey
+ Maybe<T> defaultValue = raw ? Maybe.<T>absent() :
+ ownKey.hasDefaultValue() ?
coerceFn.apply(Maybe.of((Object)ownKey.getDefaultValue())) :
+ queryKey.hasDefaultValue() ?
coerceFn.apply(Maybe.of((Object)queryKey.getDefaultValue())) :
+ Maybe.<T>absent();
+
+ if (ownKey instanceof ConfigKeySelfExtracting) {
+
+ Function<TContainer, Maybe<Object>> lookupFn = new
Function<TContainer, Maybe<Object>>() {
+ @Override public Maybe<Object> apply(TContainer input) {
+ Maybe<Object> result = getRawValueAtContainer(input,
queryKey);
+ if (!raw) result = resolveRawValueFromContainer(input,
queryKey, result);
+ return result;
+ }
+ };
+ Function<TContainer, TContainer> parentFn = new
Function<TContainer, TContainer>() {
+ @Override public TContainer apply(TContainer input) {
+ return getParentOfContainer(input);
+ }
+ };
+ AncestorContainerAndKeyValueIterator<TContainer, T> ckvi = new
AncestorContainerAndKeyValueIterator<TContainer,T>(
+ getContainer(), keyFn, lookupFn, coerceFn, parentFn);
+
+ return ConfigInheritances.resolveInheriting(
+ getContainer(), ownKey,
coerceFn.apply(lookupFn.apply(getContainer())), defaultValue,
+ ckvi, InheritanceContext.RUNTIME_MANAGEMENT,
getDefaultRuntimeInheritance());
+
+ } else {
+ String message = "Config key "+ownKey+" of
"+getBrooklynObject()+" is not a ConfigKeySelfExtracting; cannot retrieve
value; returning default";
+ LOG.warn(message);
+ return ReferenceWithError.newInstanceThrowingError(new
BasicConfigValueAtContainer<TContainer,T>(getContainer(), ownKey, null, false,
+ defaultValue),
+ new IllegalStateException(message));
+ }
+ }
+
+ public List<ConfigValueAtContainer<TContainer,?>>
getConfigAllInheritedRaw(ConfigKey<?> queryKey) {
+ List<ConfigValueAtContainer<TContainer, ?>> result =
MutableList.of();
+ TContainer c = getContainer();
+ int count=0;
+
+ final InheritanceContext context =
InheritanceContext.RUNTIME_MANAGEMENT;
+ ConfigInheritance currentInheritance =
ConfigInheritances.findInheritance(queryKey, context,
getDefaultRuntimeInheritance());
+
+ BasicConfigValueAtContainer<TContainer, Object> last = null;
+
+ while (c!=null) {
+ Maybe<Object> v = getRawValueAtContainer(c, queryKey);
+ BasicConfigValueAtContainer<TContainer, Object> next = new
BasicConfigValueAtContainer<TContainer, Object>(c, getKeyAtContainer(c,
queryKey), v);
+
+ if (last!=null && !currentInheritance.considerParent(last,
next, context)) break;
+
+ currentInheritance =
ConfigInheritances.findInheritance(next.getKey(),
InheritanceContext.RUNTIME_MANAGEMENT, currentInheritance);
+ if (count>0 && !currentInheritance.isReinheritable(next,
context)) break;
+
+ if (next.isValueExplicitlySet()) result.add(0, next);
+
+ last = next;
+ c = getParentOfContainer(c);
+ }
+
+ return result;
+ }
+
+ @Override
+ public Set<ConfigKey<?>> findKeys(Predicate<ConfigKey<?>> filter) {
+ MutableSet<ConfigKey<?>> result = MutableSet.of();
+ result.addAll(Iterables.filter(ownConfig.keySet(), filter));
+ // due to set semantics local should be added first, it prevents
equal items from parent from being added on top
+ if (getParent()!=null) {
+ result.addAll(
getParentInternal().config().getInternalConfigMap().findKeys(filter) );
+ }
+ return result;
+ }
+
+ @SuppressWarnings("unchecked")
+ public ReferenceWithError<ConfigValueAtContainer<TContainer,?>>
getConfigInheritedRaw(ConfigKey<?> key) {
+ return (ReferenceWithError<ConfigValueAtContainer<TContainer,?>>)
(ReferenceWithError<?>) getConfigImpl(key, true);
+ }
+
+ @Override
+ public Map<ConfigKey<?>, Object>
getAllConfigInheritedRawValuesIgnoringErrors() {
+ Map<ConfigKey<?>,
ReferenceWithError<ConfigValueAtContainer<TContainer, ?>>> input =
getAllConfigInheritedRawWithErrors();
+ Map<ConfigKey<?>, Object> result = MutableMap.of();
+ for (Map.Entry<ConfigKey<?>,
ReferenceWithError<ConfigValueAtContainer<TContainer, ?>>> pair:
input.entrySet()) {
+ result.put(pair.getKey(),
pair.getValue().getWithoutError().get());
+ }
+ return result;
+ }
+ @Override
+ public Map<ConfigKey<?>,
ReferenceWithError<ConfigValueAtContainer<TContainer, ?>>>
getAllConfigInheritedRawWithErrors() {
+ return getSelectedConfigInheritedRaw(false);
+ }
+
+ public
Map<ConfigKey<?>,ReferenceWithError<ConfigValueAtContainer<TContainer,?>>>
getAllReinheritableConfigRaw() {
+ return getSelectedConfigInheritedRaw(true);
+ }
+
+ protected
Map<ConfigKey<?>,ReferenceWithError<ConfigValueAtContainer<TContainer,?>>>
getSelectedConfigInheritedRaw(boolean onlyReinheritable) {
+
Map<ConfigKey<?>,ReferenceWithError<ConfigValueAtContainer<TContainer,?>>>
parents = MutableMap.of();
+ if (getParent()!=null) {
+ @SuppressWarnings("unchecked")
+
Map<ConfigKey<?>,ReferenceWithError<ConfigValueAtContainer<TContainer,?>>> po =
(Map<ConfigKey<?>,ReferenceWithError<ConfigValueAtContainer<TContainer,?>>>)
(Map<?,?>)
+
getParentInternal().config().getInternalConfigMap().getAllReinheritableConfigRaw();
+ parents.putAll(po);
+ }
+
+ Map<ConfigKey<?>, Object> local = getAllConfigLocalRaw();
+
+
Map<ConfigKey<?>,ReferenceWithError<ConfigValueAtContainer<TContainer,?>>>
result = MutableMap.of();
+
+ for (ConfigKey<?> k: local.keySet()) {
+ Object v = local.get(k);
+ ReferenceWithError<ConfigValueAtContainer<TContainer, ?>> vpr
= parents.remove(k);
+ @SuppressWarnings("unchecked")
+ ConfigValueAtContainer<TContainer, Object> vp = vpr==null ?
null : (ConfigValueAtContainer<TContainer,Object>) vpr.getWithoutError();
+ ConfigInheritance inh = ConfigInheritances.findInheritance(k,
InheritanceContext.RUNTIME_MANAGEMENT, getDefaultRuntimeInheritance());
+ ConfigValueAtContainer<TContainer,Object> vl = new
BasicConfigValueAtContainer<TContainer,Object>(getContainer(), k,
Maybe.ofAllowingNull(v));
+ ReferenceWithError<ConfigValueAtContainer<TContainer, Object>>
vlr = null;
+ if (inh.considerParent(vl, vp,
InheritanceContext.RUNTIME_MANAGEMENT)) {
--- End diff --
as per javadoc methods in `ConfigInheritances` do that; the methods here
are to reflect the component logic which needs to be defined for a consistent
inheritance strategy
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