[jboss-jira] [JBoss JIRA] Created: (JBAS-5793) Array interception for pojos stored in FIELD granularity web sessions

[Brian Stansberry (JIRA)]

Array interception for pojos stored in FIELD granularity web sessions
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                 Key: JBAS-5793
                 URL: https://jira.jboss.org/jira/browse/JBAS-5793
             Project: JBoss Application Server
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
          Components: Clustering, Web (Tomcat) service
            Reporter: Brian Stansberry
            Assignee: Brian Stansberry
             Fix For: JBossAS-5.0.0.CR2


PojoCache 2.2.0.CR5+ supports array interception.  Task here is to uncomment the section in jbossweb-cluster.aop/META-INF/jboss-aop.xml that enables it and add a couple tweaks to  the FIELD test cases so it gets exercised.

This can't be done until aop moves to 2.0.0.CR14.

Array interception means invoking the changeIt(...) method in a web session pojo would result in the change being detected and just one String being replicated:

public class Pojo {

  private String[] array = new String[1000];

   public void changeIt(int index, String newValue) {
       this.array[index] = newValue;
   }
}

Before this PojoCache improvement, PC wouldn't detect the array element change, so the changeIt(...) method would have had to reassign the 'array' field:

public class Pojo {

  private String[] array = new String[1000];

   public void changeIt(int index, String newValue) {
       String[] array1 = array;
       array1[index] = newValue;
       // Do a new field assignment so PojoCache knows something changed
       this.array = array1;
   }
}

Besides being odd looking and easy to forget to do, that code would result in the whole array being replicated rather than just one String.

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