Use Whiteboard Specification for Jakarta Servlet

[kenwenzel]

RAP could use the updated Whiteboard Specification for registering servlets and resources:
https://docs.osgi.org/specification/osgi.cmpn/8.1.0/service.servlet.html

Currently, the RWTServlet is registered via HttpService which is contained within RAP as an updated Jakarta-compatible version:
https://github.com/eclipse-rap/org.eclipse.rap/blob/main/bundles/org.eclipse.rap.http.servlet/src/org/eclipse/rap/service/http/HttpService.java

In the best case most of the org.eclipse.rap.http.* classes can be removed if the updated Whiteboard Specification is used to register servlets/resources.

For example, Felix HTTP provides an implementation for both, the "old" HttpService and the new Whiteboard Specification:
https://github.com/apache/felix-dev/tree/master/http

[kenwenzel]

@ifurnadjiev Let me know if this could be possible and if you need help.

[ifurnadjiev]

A PR with suggested implemenation will be welcomed.

[kenwenzel]

@ifurnadjiev How can I configure a Target Platform to build RAP? I've tried something like in the attached screenshot.
Unfortunately, some dependencies are still missing and/or have the wrong versions.

[ifurnadjiev]

These two are needed for the tests and client builder. Take the jars from Maven central and place them in a local folder. Add this folder to the target definition.

[ifurnadjiev]

You need:

1. org.mockito.mockito-core_5.2.0.jar
2. rhino-1.7.14.jar
3. org.objenesis_3.3.0.jar

And I also have (not sure if we you need them):

1. net.bytebuddy.byte-buddy_1.14.3.jar
2. net.bytebuddy.byte-buddy-agent_1.14.3.jar

[kenwenzel]

@ifurnadjiev Thank you. I'll try this.

BTW, KOMMA https://github.com/komma/komma is also rather complex and has many Eclipse plugins.
I build it completely without Tycho - only using Maven and BND.
I think this would also be possible and way better for Eclipse RAP.

[kenwenzel]

@ifurnadjiev OK, the following target file is almost working:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?pde version="3.8"?>
<target includeMode="feature" name="RAP Target">
	<locations>
		<location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
			<repository location="https://download.eclipse.org/rt/rap/4.7/e4"/>
			<unit id="org.eclipse.rap.e4.feature.feature.group" version="4.7.0.20260603-1800"/>
			<unit id="org.eclipse.rap.e4.equinox.target.feature.feature.group" version="4.7.0.20260603-1800"/>
			<unit id="org.eclipse.rap.e4.sdk.feature.feature.group" version="4.7.0.20260603-1800"/>
		</location>
		<location includeDependencyDepth="none" includeDependencyScopes="compile" includeSource="true" missingManifest="generate" type="Maven">
			<dependencies>
				<dependency>
					<groupId>net.bytebuddy</groupId>
					<artifactId>byte-buddy-agent</artifactId>
					<version>1.14.3</version>
					<type>jar</type>
				</dependency>
				<dependency>
					<groupId>net.bytebuddy</groupId>
					<artifactId>byte-buddy</artifactId>
					<version>1.14.3</version>
					<type>jar</type>
				</dependency>
				<dependency>
					<groupId>org.mockito</groupId>
					<artifactId>mockito-core</artifactId>
					<version>5.2.0</version>
					<type>jar</type>
				</dependency>
				<dependency>
					<groupId>org.mozilla</groupId>
					<artifactId>rhino</artifactId>
					<version>1.7.14</version>
					<type>jar</type>
				</dependency>
			</dependencies>
		</location>
	</locations>
</target>

I had to remove ALL test bundles as these have additional dependencies which are missing.