1. A computer program product for application of system level policy in message oriented middleware comprising a computer-readable storage device in which computer-executable instructions are stored, which instructions, when executed by a computer, cause the computer to: define one or more policies to be applied to a set of one or more messages in the message oriented middleware; monitor metrics of the message oriented middleware; initiate application of a policy in response to a trigger condition being satisfied; and where application of the policy applies actions across the set of one or more messages, applies the defined policy to an abstract representation of at least one message to allow manipulation of the at least one message without loading the whole at least one message into memory, and the abstract representation of the at least one message allows only loading of metadata of the at least one message.