Github user Graeme-Miller commented on a diff in the pull request:
https://github.com/apache/brooklyn-server/pull/342#discussion_r80075903
--- Diff:
core/src/main/java/org/apache/brooklyn/core/mgmt/internal/LocalUsageManager.java
---
@@ -173,20 +180,23 @@
public LocalUsageManager(LocalManagementContext managementContext) {
this.managementContext = checkNotNull(managementContext,
"managementContext");
- // TODO Once
org.apache.brooklyn.core.management.internal.UsageManager.UsageListener is
deleted, restore this
- // to normal generics!
+ // Although changing listeners to Collection<UsageListener> is
valid at compile time
+ // the collection will contain any objects that could not be
coerced by the function
+ // declared above. Generally this means any string declared in
brooklyn.properties
+ // that is not a UsageListener.
Collection<?> listeners =
managementContext.getBrooklynProperties().getConfig(UsageManager.USAGE_LISTENERS);
if (listeners != null) {
- for (Object listener : listeners) {
- if (listener instanceof ManagementContextInjectable) {
-
((ManagementContextInjectable)listener).setManagementContext(managementContext);
- }
- if (listener instanceof UsageListener) {
- addUsageListener((UsageListener)listener);
- } else if (listener == null) {
- throw new NullPointerException("null listener in
config "+UsageManager.USAGE_LISTENERS);
+ for (Object obj : listeners) {
+ if (obj == null) {
+ throw new NullPointerException("null listener in
config " + UsageManager.USAGE_LISTENERS);
+ } else if (!(obj instanceof UsageListener)) {
+ throw new ClassCastException("Configured object is not
a UsageListener. This probably means coercion failed: " + obj);
} else {
--- End diff --
doesn't really need to be an else anymore
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