@Transactional (propagation) Propagation.SUPPORTS et Propagation.MANDATORY

Bonjour,

Quelqu'un pourra m'expliquer à quoi sert la propagation ? Propagation.SUPPORTS ? Propagation.MANDATORY ?

Code:

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1 2	@Transactional( propagation = Propagation.SUPPORTS,readOnly = true )

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Code:

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1 2	@Transactional( propagation = Propagation.MANDATORY )

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Merci