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OSEE/Design/OseeApplicationServer/Architecture
< OSEE
Contents
OSEE Application Server Architecture
Currently, the OSEE application server is divided into the following services:
- Branch Management
- Authentication
- Session Management
- Resource Management
- Searching/Tagging Engine
- Server Lookup / Arbitration
- Task Service
- Admin Operations
Communication between Client/Server is handled via servlets:
- Session Management Servlet - interats with session manager and authentication
- Resource Management Servlet - interacts with resource management service to store, acquire, and delete resource data
- Branch Management Servlet - interacts with the Branch Management Service
- Search Engine Servlet - interacts with search and tagging services
- Server Lookup Servlet - performs server lookup / arbitration
- Add ons (These are servlets that provide none-core functionality) :
- Artifact Servlet - serves artifact's binary data (only supports whole word document artifact types)
- Client Info Servlet - provides application server installation locations through a web pagee
Design Limitations
- Progress Information is not sent to clients
- Unable to easily cancel operations once they are in progress
- Unable to determine what is running on the server (communication between service)
- Code duplication between admin ops and client requested ops
- Database code is spread out among services
Reasons For refactor
- Address design limitations
- Change from servlet communication to using Osee Messaging Service (Gateway)
- Easily migrate skynet core functionality to the server
- Be able to synchronize operations for data integrity
- Multiple application servers - distributed
Architecture Goal
Communication
Blocks
New Service Structure
- Need a controller to dispatch all operations - sends
- Services:
- Status Service - who is running what - multi app server / internal - potential progress monitoring
- Negotiation Service - synchronization of operations
- Executor Service - manages thread pools/jobs -
- only one allowed to create threads.
- only one allowed to run the operation.
- All other services send/receive messages (dispatchers)
- Operations send/receive messages
- Bundle:
- Versioning Bundle
- Commit
- Create Branch
- Change Report
- Branch Exchange
- Versioning Bundle
Migration
- Commit -
- Change Report -
- Transaction Manager -
- Branch Archiving -
- Status Service -
- Conflict -
- Executor Service -