The service tier has a central server that provides a web server front-end and core services, such as workflow, agent management, deployment, inventory, and security.
Workflow requests are initiated with either the web application user interface, the CLI (command line interface), or through REST service calls through integrating products, such as SBM.
Deployment Automation uses stateless communications for the JMS-based server-agent communications as well as client-web service communications. Stateless, as used here, means the server retains little session information between requests and each request contains all the information required to handle it.
The server sets-up listening sockets and listens for agents, relays, and users (clients). By default the server listens on only three ports: port 7918 for JMS, 8080 for HTTP, 8443 for HTTPS.
The communication mechanisms used by the server to access an Oracle relational database management system, Release Manager and SBM, agents or agent relays, and CodeStation are shown in the following example.
Figure 1. Server Communication
