Explain the common technical complexities and patterns in integration development18% of the exam
Request-reply, one-way, multicast, batch and stream patterns
How the five interaction patterns differ: blocking request-reply, one-way messaging through a queue, multicast through an Anypoint MQ message exchange, Mule batch jobs for larger-than-memory record sets, and Mule 4 repeatable streams for large payloads.
Describe the differences between the request-reply, one-way, multicast, batch, and stream interaction patterns.
~6 min read · 5 practice questions ·
What the exam expects
- Recognize request-reply as the blocking pattern where the caller waits for the answer before it continues.
- Recognize one-way (fire-and-forget) messaging through a queue, where sender and receiver never need to be present at the same time.
- Distinguish multicast (one message to several receivers at once) from a single queue that delivers each message to one consumer.
- Describe what a Mule Batch Job adds: record splitting, persistent queues, resumable processing and a results report.
- Explain how Mule 4 streams large payloads with repeatable streams by default.
Key terms:
- Request-reply: a synchronous, blocking call; the client waits for the server's response.
- One-way: an asynchronous send; the sender continues without waiting for a reply.
- Multicast: one published message delivered simultaneously to several receivers.
- Batch: reliable, asynchronous processing of a large record set in phases.
- Stream: content consumed incrementally instead of loaded whole, buffered so it can be reread.
Key facts
Synchronous model
- Detail
- Blocking; the client waits for the response
Queue consumption
- Detail
- Retrieved messages are locked and invisible to other consumers
Exchange limits
- Detail
- 10 MB message; 450 bound queues; 25 with routing rules
Batch reliability
- Detail
- Persistent queues; resumes after a crash or redeployment
Batch edition
- Detail
- Enterprise Edition only, not the Mule kernel
Default stream strategy
- Detail
- File-stored repeatable (EE), 512 KB in memory first
Sources for this section (5)
- Why can an app never consume directly from an Anypoint MQ message exchange?
- When does an in-memory repeatable stream make the app fail?
- What happens to a locked Anypoint MQ message whose consumer crashes?
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