Lukasz Lenart created WW-5587:
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Summary: WithLazyParams interceptors lose parameters in stack
configurations
Key: WW-5587
URL: https://issues.apache.org/jira/browse/WW-5587
Project: Struts 2
Issue Type: Bug
Components: Core Interceptors
Reporter: Lukasz Lenart
Fix For: 7.2.0
When interceptors implementing {{WithLazyParams}} are configured with
parameters through interceptor stack references, the parameters are not stored
in {{InterceptorMapping.getParams()}}, breaking the lazy parameter injection
mechanism.
h3. Steps to Reproduce:
1. Create an interceptor implementing WithLazyParams
2. Configure it in an interceptor stack with parameter overrides:
{code:xml}
<interceptor-ref name="stackName">
<param name="interceptorName.paramName">value</param>
</interceptor-ref>
{code}
3. During action invocation, {{LazyParamInjector.injectParams()}} receives
empty params map
h3. Root Cause:
{{InterceptorBuilder.constructParameterizedInterceptorReferences()}}} at line
177 creates {{InterceptorMapping}} without passing the params map:
{code:java}
new InterceptorMapping(key, interceptor) // Missing params!
{code}
This should be:
{code:java}
new InterceptorMapping(key, interceptor, map)
{code}
h3. Impact:
- WW-5586 fix successfully sets properties on interceptor instances at factory
time
- However, {{LazyParamInjector}} cannot re-evaluate expression parameters at
invocation time because {{InterceptorMapping.getParams()}} returns empty
- This breaks the dual initialization pattern for {{WithLazyParams}}
interceptors in stack configurations
h3. Expected Behavior:
{{InterceptorMapping.getParams()}} should contain the parameter map so
LazyParamInjector can re-evaluate expressions like {{$\{someValue\}}} at each
action invocation.
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