README.md

About

This example illustrates how Smooks can be used to split a message into smaller messages and route the smaller messages to file.

This example uses Smooks to process an input Order message, splitting it into smaller Order Item messages and routing them to file.

See:

1. The Smooks configuration in splitter-router/smooks-config.xml. Specifically, take a look at the FileOutputStreamResource resource configuration and how it uses the "highWaterMark" param to throttle split file generation.
2. The "Main" class in splitter-router/src/main/java/example/Main.java. This is the class that executes smooks to split Order messages into smaller Order Item messages.
3. The "Main" class in file-consumer/src/main/java/example/Main.java. This is the class that "consumes" the order-item record files as they are produces.
4. After running (see below), the generated input message can be seen in the "target" directory.

How to run?

Running:

1. In the file-router directory, run mvn clean package.
2. Open a new console window ("Window 1")
3. In "Window 1", change directory into the "file-consumer" directory.
4. In "Window 1", run "mvn exec:exec".
5. Open a new console window ("Window 2")
6. In "Window 2", change directory into the "splitter-router" directory.
7. Arrange "Window 1" and "Window 2" such that the contents of both windows is visible at the same time.
8. In "Window 2", run "mvn exec:exec". When asked how many order-item records you'd like in the generated input message, just enter a small number to start with (e.g. 20). Later, try a HUGE message and see how Smooks can process it (e.g. 1,000,000 order-items).
9. See Smooks throttling against the High Water Mark ("Window 2") while the messages are being slowly consumed by the file-consumer ("Window 1").

Monitoring (optional):

1. export MAVEN_OPTS=-Dcom.sun.management.jmxremote
2. "jconsole"