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From "Thomas Mueller (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCR-2049) A tool to support large or long running transactions
Date Tue, 31 Mar 2009 10:05:51 GMT
A tool to support large or long running transactions
----------------------------------------------------

                 Key: JCR-2049
                 URL: https://issues.apache.org/jira/browse/JCR-2049
             Project: Jackrabbit Content Repository
          Issue Type: New Feature
          Components: jackrabbit-jcr-commons
            Reporter: Thomas Mueller
            Assignee: Thomas Mueller
            Priority: Minor


I propose to write a tool for large or long running transactions. Instead of keeping the changes
in the transient space until a transaction is completed, a backup of the current state is
stored in a backup area. This allows to save intermediate steps.

I propose to create add a tool (probably just one class) in the jackrabbit-jcr-commons project,
package org.apache.jackrabbit.commons.tools:

class LargeTransactionTool {
  LargeTransactionTool getInstance(Session session, String backupPath);
  beginTransaction();
  deleteRecursive(Node n);
  Node addNode(Node parent, String name);
  backup(Node n);
  backupRecursive(Node n);
  commit();
  rollback();
}

An application could then use the tool as follows:

LargeTransactionTool tool = LargeTransactionTool.getInstance(session, "/backupArea");
tool.backup(n1);
n1.setProperty(...);
session.save();
tool.deleteRecursive(n2);
session.save();
n4 = tool.addNode(n3, "x");
session.save();
tool.commit();

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