Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I found this <a href="http://www.norwinter.com/2009/08/20/refactor-serializable-java-class/" rel="nofollow noreferrer">blog post</a> that claims to have a solution, though it doesn't spell it out very clearly.</p> <p>What it is actually saying is that you create a subclass of <code>ObjectInputStream</code> that overrides the <code>readClassDescriptor</code> method to do something like this:</p> <pre><code>@Override protected java.io.ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException { ObjectStreamClass desc = super.readClassDescriptor(); if (desc.getName().equals("oldpkg.Widget")) { return ObjectStreamClass.lookup(newpkg.Widget.class); } return desc; }; </code></pre> <hr> <p>You should also look at this <a href="https://stackoverflow.com/questions/4668675/replacing-class-name-in-serialized-data">SO question and its answers</a> which cover some of the same ground as your question.</p> <p>My advice would be: <strong>don't</strong> support the case where old versions of software read data serialized by the new version. </p> <ul> <li><p>This is a good opportunity to encourage (actually force) people to upgrade to the latest version of the code-base. Generally speaking, it is in <em>everyone's</em> interest that this happen sooner rather than later.</p></li> <li><p>If it is premature to force people to upgrade for other reasons, then (IMO) you should seriously consider <em>backing out</em> your changes to the class / package names. Wait until you've got a clear strategy / plan for upgrading that is 1) technically sound, and 2) acceptable to all stakeholders.</p></li> </ul>
    singulars
    1. This table or related slice is empty.
    1. POHow to deal with a Java serialized object whose package changed?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. USStephen C
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHow to deal with a Java serialized object whose package changed?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThanks! This seems to address only the case where the legacy class needs to be deserialized into the new class, but not serialized back into a compatible stream that servers with old code would understand. Maybe the same principle can apply, but I need to research this further. Thanks again for the link! :)
      singulars
      1. PO
      1. USAlejandro
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload