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  1. WildFly
  2. WFLY-4839

annotation must be scanned regardless of the version of web.xml unless metadata-complete is explicitly set to true



      ### Description of problem:
      Annotation must be scanned regardless of the version of web.xml unless metadata-complete is explicitly set to true.
      Note that Servlet 3.0 specification clearly states the following:
      1.6.2 Processing annotations
      In Servlet 2.5, metadata-complete only affected the scanning of annotations at
      deployment time. The notion of web-fragments did not exist in servlet 2.5. However
      in servlet 3.0 metadata-complete affects scanning of all annotations and web-
      fragments at deployment time. The version of the descriptor MUST not affect which
      annotations you scan for in a web application. An implementation of a particular
      version of the specification MUST scan for all annotations supported in that
      configuration, unless metadata-complete is specified.
      ### How reproducible:
      ### Steps to Reproduce:
      1. Create a library jar which contains a servlet filter using @WebFilter 
      2. Put the jar under WEB-INF/lib of the web application which web.xml version is 2.3 or 2.4
      3. Start JBoss EAP 6
      4. Access the web application and see if the servlet filter works
      ### Actual results:
      The servlet filter is not invoked
      ### Expected results:
      The servlet filter is invoked
      ### Additional info:
      It works when the version of web.xml is 2.5 or 3.0
      [reply] [−]
      Comment 1 Masafumi Miura 2015-06-25 07:18:17 EDT
      It looks metadata-complete is always set to true when the version of web.xml is 2.3 or 2.4 at the line 96 of web/src/main/java/org/jboss/as/web/deployment/WarMetaDataProcessor.java.
      Though Servlet 2.3/2.3 specification does not have metadata-complete attribute, Servlet 3.0 specification states the following. I think it means that the metadata-complete attribute default to false if it is not specified.
      8.1 Annotations and pluggability
      if the metadata-complete attribute is not specified or is set to "false", the
      deployment tool must examine the class files of the application for annotations, and
      scan for web fragments.
       * web/src/main/java/org/jboss/as/web/deployment/WarMetaDataProcessor.java
       76 public class WarMetaDataProcessor implements DeploymentUnitProcessor {
       78     @Override
       79     public void deploy(DeploymentPhaseContext phaseContext) throws DeploymentUnitProcessingException {
       87         boolean isComplete = false;
       88         WebMetaData specMetaData = warMetaData.getWebMetaData();
       89         if (specMetaData != null) {
       90             if (specMetaData instanceof Web25MetaData) {
       91                 isComplete |= ((Web25MetaData) specMetaData).isMetadataComplete();
       92             } else if (specMetaData instanceof Web30MetaData) {
       93                 isComplete |= ((Web30MetaData) specMetaData).isMetadataComplete();
       94             } else {
       95                 // Any web.xml 2.4 or earlier deployment is metadata complete
       96                 isComplete = true;
       97             }
       98         }

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              • Assignee:
                soul2zimate Chao Wang
                soul2zimate Chao Wang
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