https://github.com/pokle/transactional-maps

Adds the notion isolated transactions to a map.
https://github.com/pokle/transactional-maps

Last synced: 10 days ago
JSON representation

Adds the notion isolated transactions to a map.

• Host: GitHub
• URL: https://github.com/pokle/transactional-maps
• Owner: pokle
• Created: 2010-03-08T14:25:19.000Z (over 14 years ago)
• Default Branch: master
• Last Pushed: 2010-03-09T00:15:34.000Z (over 14 years ago)
• Last Synced: 2023-03-11T00:19:15.666Z (over 1 year ago)
• Language: Java
• Homepage:
• Size: 273 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
A transactional map

----

Adds the notion of isolated transactions to a map.

All operations defined on the cut down map interface net.pokle.dbtb.Database can

be commited (or rolledback) in isolation to any changes made in other transactions.

You can also chain transactions ala patchsets in git or mercurial.

Here's an example of what's possible: (From DatabaseSampleTest)

        // A base database

        HashMapDatabase base = new HashMapDatabase();

        // And its un-commited transaction

        Transaction child = new Transaction(base);

        // A modification to the base...

        base.put("The meaning of life", "0");

        // ... is visible to both the base and child transactions

        assertEquals("0", base.get("The meaning of life"));

        assertEquals("0", child.get("The meaning of life"));

        // A modification of the child transaction...

        child.put("The meaning of life", "42");

        // ... is only visible in the child transaction

        assertEquals("42", child.get("The meaning of life"));

        assertEquals("0", base.get("The meaning of life"));

        // You can commit a child transaction to its parent

        child.commit();

        assertEquals("42", child.get("The meaning of life"));

        assertEquals("42", base.get("The meaning of life"));