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M

managed container

See Fabric Container.

marshalling

The process of taking in-memory objects and converting them to a binary or textual format for transmission over a transport.

See Also unmarshalling.

master/slave

A topology in which a single instance, the master, is active and one or more instances, the slaves, are ready to resume when the active instance stops.

message

An atomic unit of data that is passed between two or more clients. A message consists of three components:

  • headers—contain a predefined set of metadata that is used to communicate information about a message between the different parties that handle the message

  • properties—contain application defined metadata about a message to the different parties that handle the message

  • body—contains the messages payload

message group

A collection of JMS messages that are assigned the same JMSXGroupID.

When used in conjunction with the JMSXGroupSeq message groups can be used to ensure that messages are processed in the proper sequence.

message selector

A string containing a boolean SQL statement using SQL 92 syntax that is used to select messages based on JMS message header properties.

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