[chef] Dependency between nodes

[Vikas Roonwal < >]

Hi,
I wanted to know if chef is suitable for the following scenari, if yes then what would be the best way to achieve it.
We need to deploy a web-application which contains 3 components
1. A WAR file - portal
2. An application - A module which interacts with the portal for different tasks
3. DB
4. Active MQ - To facilitate the communication b/w Portal and App

If the above 4 components are on different machines/nodes, can the deployment be made atomic i.e. either all nodes get upgraded or none does.
I have an ANT script which can handle the deploy-all or none on a sinle node, is chef a possible solution if we need to suppprt the same across nodes?

Thanks,
~Vikas