Services (new concept introduced in R12) define the set of processes that will be started on each application node. These services can be activated or deactivated on a specific application tier/node.

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Type of Application Services
Application tier processes are broadly classified in to five type of Services

i) Root Service  – Oracle Process Manager and Notification (OPMN) is part of Oracle Application Server 10G R2/R3. OPMN is used for inter process communication (between OC4J, HTTP Server), death detection and start/stop of Services for 10g R3.

ii) Web Entry Point Services – HTTP Server is part of Oracle Application Server 10G R3 and built on Apache (aka Oracle Apache. All web request to R12 first hit HTTP Server.

iii) Web Application Services – OACORE OC4J, Forms OC4J, OAFM OC4J – These are set of 3 OC4J (Oracle Container for J2EE) to run application.

iv) Batch Processing Services – This set of service consist of Apps Listener (FNDFS & FNDSM), Concurrent Manager, Fulfillment Server and Interaction Server

v) Other Services – Oracle Forms Service, Forms Metric Client/Server and Mobile Web Application (MWA) Service

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Process       —>   Services –> Startup Script –> Context parameter

a) Oracle Process Manager -  Root Service  – adopmnctl.sh- s_root_status, s_opmnstatus
b) Oracle HTTP Server  – Web Entry Point Service – adapcctl.sh- s_web_entry_status, s_oacorestatus
c) OACORE OC4J – Web Application Services – adoacorectl.sh- s_web_applications_status s_oacorectrl
d) FORMS OC4J – Web Application Services – adformsctl.sh- s_web_applications_status, s_formsstatus
e) OAFM OC4J – Web Application Services – adoafmctl.sh- s_web_applications_status, s_oafmstatus
f) Concurrent Manager -   Batch Processing Service – adcmctl.sh- s_batch_status, s_concstatus
g) Apps Listener -  Batch Processing Service – adalnctl.sh- s_batch_status, s_tnsstatus
h) Interaction Center (ICSM) -  Batch Processing Service – ieoicsm.sh- s_batch_status, s_icsmctrl
i) Fulfillment Server -  Batch Processing Service – jtffmctl.sh- s_batch_status, s_jtffsstatus
j) Forms Server -   Other Service – adformsrvctl.sh- s_other_service_group_status , s_formsserver_status
k) Metric Client -   Other Service – adfmcctl.sh- s_other_service_group_status , s_metcstatus
l) Metric Server -   Other Service – adfmsctl.sh- s_other_service_group_status , s_metsstatus
m) Mobile Web Application (MWA) -   Other Service – mwactlwrpr.sh- s_other_service_group_status , s_mwastatus