Task Update Tracker

Title
Task Update Tracker

State
Not started

Time used

Time estimated

Description

The goal of this task is to establish the Update Tracker mechanism in DOMS. The update tracker will provide the following functionality to DOMS

  1. Request Entry Pids changed since a given date.

Design

The Update tracker will consist of a number of components.

  1. A database, called DB.
  2. A JMS client
  3. The update tracker service.

The database will have two tables.

  1. Entry Pid - Date changed - View Name - Date published: Associates each entry pid/view name combo with a changed date, and a date for the publication of the resource.
  2. Object Pid - Entry Pid - View Name: Associates each pid in DOMS with a entry pid/view name combo.

There are two main flows in the service

  1. Update:
    1. JMS client will be notified upon change to an object
    2. The object pid is looked up in table 1 to a set of entry pid/view name combos.
    3. Each of these combos gets the corresponding entry has date changed updated in table 1.
    4. If the change was in RELS-EXT:
      1. For each view name for the entry object
        1. Request the view object list for this entry object, from ECM
        2. Delete all entries for entry pid in table 2.
        3. Add all objects from the ecm list to table 2.
  2. Lookup(pid)
    1. Lookup in 1. to get date changed, or date published. (Summa search should only use date published, Summa gui should use date changed).
    2. If entry not found, return error.

Secondly, there is the rebuild flow

  1. Rebuild
    1. Drop the contents of table 1 and table 2
    2. From ECM, get all view angles
    3. For each view angle
      1. Get all entry pids for view angle
      2. for each entry pid
        1. Get the View object list for this object, from ECM
        2. Add the corresponding entries to table 2.
        3. Get the latest change-date from the view object list, and set this as the changed-date in table 1. If published, mark it as published on the last change date.

The update tracker should not return object blobs, only dates.

Sub tasks

Title State Time used Time estimated

Documentation

Progress history

Iteration Time used Status Notes Tasks adressed