DMI calls to any server method

[Isomorphic]

You need to show your actual attempt. That's what is going to allow us to help.

[atomatom]

I think this could perhaps be one of the most useful ways of connecting my server logic to the client. But I'm having troubles.

From the docs p57:

DMI Method Arguments

The methodArguments attribute can be added to an
<operationBinding> to configure specific arguments that should be
passed to a DMI method. For example, given a Java method:

List<Lead> getRelatedLeads(long accountId, boolean includeDeleted)

You might call this method via a DMI declaration like:

<operationBinding operationType="fetch"> 
<serverObject className="com.sample.DMIHandler"
methodName="doFullTextSearch"
methodArguments="$criteria.accountId,false"/>
</operationBinding>

Because the getRelatedLeads method returns a List of Java
Beans—a format compatible with dsResponse.setData()—there is
no need to create or populate a DSResponse. Combining this with
the methodArguments attribute allows you to call pre-existing Java
business logic with no Smart GWT-specific server code at all,
without even the need to import Smart GWT libraries code in your
server-side logic.

I really want to get this working, but I fear the above example is broken in more than a few ways. The obvious 'doFullTextSearch' is not 'getRelatedLeads' but I think there are some more errors in the way it's laid out.

I would greatly appreciate an example that works.

No matter what I try, it seems to complain that "Operation type 'fetch' not supported by this DataSource"

=== 2011-01-14 21:24:20,644 [57-6] DEBUG AppBase - [builtinApplication.myDMI_DataSource_fetch] No public zero-argument method named '_myDMI_DataSource_fetch' found, performing generic datasource operation
=== 2011-01-14 21:24:20,646 [57-6] WARN  RequestContext - dsRequest.execute() failed: 
java.lang.Exception: Operation type 'fetch' not supported by this DataSource (myDMI_DataSource)
	at com.isomorphic.datasource.DataSource.notSupported(DataSource.java:1874)
	at com.isomorphic.datasource.DataSource.executeFetch(DataSource.java:1814)
	at com.isomorphic.datasource.DataSource.execute(DataSource.java:1048)
	at com.isomorphic.application.AppBase.executeDefaultDSOperation(AppBase.java:721)
	at com.isomorphic.application.AppBase.executeAppOperation(AppBase.java:658)
	at com.isomorphic.application.AppBase.execute(AppBase.java:491)
	at com.isomorphic.datasource.DSRequest.execute(DSRequest.java:1443)
	at com.isomorphic.servlet.IDACall.handleDSRequest(IDACall.java:173)