h1. Introduction

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Several concurrent life-cycles exist in Petals ESB:
* the Petals ESB life-cycle,
* the share-library life-cycle,
* the component life-cycle,
* the service-assembly life-cycle,
* the service-unit life-cyle.

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h1. The Petals ESB life-cyle

The Petals ESB life-cycle is very simple.
{gliffy:name=Petals ESB lifecyle|version=2}
It contains only one state: STARTED. The implicit state 'STOPPED' does not really exist because in such state no Petals ESB process is running.

h1. The shared-library life-cyle

h1. The component life-cycle

h1. The service-assembly life-cycle

h1. The service-unit life-cyle