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https://issues.apache.org/jira/browse/BROOKLYN-329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15892611#comment-15892611
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ASF GitHub Bot commented on BROOKLYN-329:
-----------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/brooklyn-server/pull/480
> $brooklyn:config hangs, rather than getting default brooklyn.parameter value
> ----------------------------------------------------------------------------
>
> Key: BROOKLYN-329
> URL: https://issues.apache.org/jira/browse/BROOKLYN-329
> Project: Brooklyn
> Issue Type: Bug
> Reporter: Aled Sage
> Priority: Minor
>
> Using 0.10.0-SNAPSHOT...
> I wrote a YAML entity where CouchDB was configured with an initial
> username/password, and another app that included CouchDB would inject it.
> In each blueprint, I defined a brooklyn.parameter with a default value for
> the username/password. I used the same config key name in each.
> However, when I ran my blueprint it hung. The CouchDB was waiting forever for
> the username/password config value.
> I recreated this behaviour in the simpler test case below (which I'll add to
> {{ConfigParametersYamlTest}}).
> The workaround is to use a different name for the config key in each
> blueprint. For example, in the outer blueprint above if youchange the name to
> {{my.param.key2}} then the test passes.
> Debugging it, one surprising thing I noticed is that {{scopeRoot()}}
> evaluates to be "entity-with-tests" rather than {{wrapper-entity}}.
> {noformat}
> public void testConfigParameterPassedFromOuterConfigParameter() throws
> Exception {
> addCatalogItems(
> "brooklyn.catalog:",
> " itemType: entity",
> " items:",
> " - id: entity-with-keys",
> " item:",
> " type: "+TestEntity.class.getName(),
> " brooklyn.parameters:",
> " - name: my.param.key",
> " type: string",
> " default: myDefaultVal",
> " brooklyn.config:",
> " my.other.key: $brooklyn:config(\"my.param.key\")");
> addCatalogItems(
> "brooklyn.catalog:",
> " itemType: entity",
> " items:",
> " - id: wrapper-entity",
> " item:",
> " brooklyn.parameters:",
> " - name: my.param.key",
> " type: string",
> " default: myDefaultValInOuter",
> " type: entity-with-keys",
> " brooklyn.config:",
> " my.param.key:
> $brooklyn:scopeRoot().config(\"my.param.key\")");
>
> String yaml = Joiner.on("\n").join(
> "services:",
> "- type: wrapper-entity");
>
> Entity app = createStartWaitAndLogApplication(yaml);
> final TestEntity entity = (TestEntity)
> Iterables.getOnlyElement(app.getChildren());
> Asserts.assertReturnsEventually(new Runnable() {
> public void run() {
>
> assertEquals(entity.config().get(ConfigKeys.newStringConfigKey("my.other.key")),
> "myDefaultValInOuter");
> }},
> Asserts.DEFAULT_LONG_TIMEOUT);
> }
> {noformat}
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