Scenario and Feature Reference
AMPS offers a wide array of messaging features to solve a variety of messaging scenarios. This section presents some basic mappings between common messaging scenarios and the AMPS features that support those scenarios. Of course, this list is just a sampling of the types of applications that use AMPS.
Simple, low-latency publish and subscribe (many to many messaging) with no need to persist messages.
Ad hoc Publish and Subscribe
Publish and subscribe with a replayable audit trail.
Transaction Log and Bookmark Subscription
Snapshot of the current state of a set of messages (for example, graphing the elapsed time for all pending orders).
State of the World (SOW)
Creating a view server that aggregates information about a high-velocity data feed for reporting.
State of the World (SOW)
Views and Aggregation
Transaction Log and Replication
Snapshot of the current state of a set of messages followed by updates to those messages (for example, showing the current status of a set of orders when a UI starts and then showing real-time updates to those messages).
State of the World (SOW)
SOW and Subscribe from client application
Ensuring that a given message is processed once, by a single subscriber (for example, a workload distribution system).
Message Queues (Queues use the Transaction Log)
Replaying messages from a point in time.
Transaction Log and Bookmark Subscription
Transforming messages as they are published to AMPS.
State of the World (SOW) and Enrichment
Producing aggregate data for a stream of messages.
State of the World (SOW) and Views or Aggregated Subscriptions
Coordinating work across a set of independent workers who are each assigned discrete tasks.
Message Queues
Dividing work among a set of workers who each update a portion of a record.
State of the World (SOW) and Delta Publish
Providing highly available messaging with multiple servers providing failover.
Transaction Log and Replication
The scenarios above describe just a few of the more common scenarios in which AMPS is used. For messaging scenarios that aren't described above, contact 60East at http://support.crankuptheamps.com/ for advice and guidance.
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