So far, we have focused on synchronous communication using the NetTcp adapter. The filesystem adapter and the MSMQ adapter work asynchronously and differently from synchronous adapters.
Asynchronous adapters use the following two tables to store messages:
AifGatewayQueue: TheAifGatewayQueuetable is used in the asynchronous processing of both inbound and outbound messages. Inbound messages are stored in this table after they are retrieved by the gateway receive service. Outbound messages are stored in this table after they are processed by the outbound processing service.AifOutboundProcessingQueue: TheAifOutboundProcessingQueuetable is used by the send service framework to store requests for outbound messages. These requests are then processed by the outbound processing service that stores a message in theAifGatewayQueuetable.
The following flowchart displays the relationship between the tables and the classes that are used for asynchronous communication:
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