Is it possible to start Mule3 embedded without spring dependency? - mule

Question

I am trying to use Mule 3.2.1 embedded from a plain java application. The application is suppose to run in an environment where storage space is limited.
I tried something like (import, exceptions omitted for brevity):
DefaultMuleContextFactory muleContextFactory = new DefaultMuleContextFactory();
ConfigurationBuilder configBuilder = new AutoConfigurationBuilder("mule-config.xml");
MuleContext muleContext = muleContextFactory.createMuleContext(configBuilder);
muleContext.start();
and also this:
AutoConfigurationBuilder configBuilder = new AutoConfigurationBuilder("mule-config.xml");
DefaultMuleConfiguration configuration = new DefaultMuleConfiguration();
MuleContextBuilder contextBuilder = new DefaultMuleContextBuilder();
contextBuilder.setMuleConfiguration(configuration);
MuleContext muleContext = new DefaultMuleContextFactory().createMuleContext(configbuilder, contextBuilder);
muleContext.start();
but both require spring-core, spring-beans, spring-context and some commons libraries. Any help would be great.

Answer 1

If you use the XML configuration, you need Spring.
If you don't want to use Spring, your options are:
Instantiate and wire Mule internal components by hand, dealing with life cycles as well,
Wait until Mule DSL gets released. You may want to bug MuleSoft about a release date :)
If you only want to use raw transports, ie not configure any flow or pattern, you can do it without Spring but bear in mind that, if the mule-core dependency doesn't bring Spring transitively, all the modules and transports do. This means that you'll have to use filtering to keep these dependencies at bay.
For example to use the HTTP transport, you would need these Maven dependencies:
<dependency>
<groupId>org.mule</groupId>
<artifactId>mule-core</artifactId>
<version>3.4.0</version>
</dependency>
<dependency>
<groupId>org.mule.transports</groupId>
<artifactId>mule-transport-http</artifactId>
<version>3.4.0</version>
<exclusions>
<exclusion>
<groupId>org.mule.modules</groupId>
<artifactId>mule-module-spring-config</artifactId>
</exclusion>
</exclusions>
</dependency>
With this in place you then do:
MuleContextFactory muleContextFactory = new DefaultMuleContextFactory();
MuleContextBuilder muleContextBuilder = new DefaultMuleContextBuilder();
MuleContext muleContext = muleContextFactory.createMuleContext(muleContextBuilder);
muleContext.start();
MuleClient client = muleContext.getClient();
MuleMessage response = client.request("http://www.google.com", 20000L);
System.out.println(response.getPayloadAsString());
muleContext.dispose();
System.exit(0);
Note that if that's all you're doing with Mule, then you'd rather use the Apache HTTP Client directly :)

Answer 2

MuleContextFactory muleContextFactory = new DefaultMuleContextFactory();
MuleContextBuilder muleContextBuilder = new DefaultMuleContextBuilder();
MuleContext muleContext
muleContextFactory.createMuleContext(muleContextBuilder);
muleContext.start();
// create mule client
MuleClient client = new MuleClient(muleContext);
// generate xml request
String reportRequestXml = createXML(reportRequest);
// set up message properties
Map<String, Object> messageProperties = new HashMap<String, Object>();
messageProperties.put("Content-Type", "application/xml");
// send request with timeout
MuleMessage response = client.send(crsRestUrl, reportRequestXml, messageProperties, httpTimeout);
muleContext.stop();