[jetty-users] Adding different handlers into ContextHandlerCollection

[Aniruddha Tekade <atekade@xxxxxxxxxxxx>]

Hello all,

I am using Jetty 11 (Jakarta namespace ) and trying to integrate 

swagger into it. I am very new to swagger as well as Jetty, I am 

referring a github gist - 

https://gist.github.com/nosmokingpistol/302c4c3ef30f183cf70e

When I looked at the examples of the swagger integration into Jetty,

most of the projects create a ServletContextHandler and then add it into 

ContextHandlerCollection. And this seems to be the easiest option to work

with. 

However, in my case, there are already pre-existing handlers of type 

ContextHandler added into contextHandlerCollection. So when I add 

my ServletContextHandler into ContextHandlerCollection and run the program, 

it fails at:

Caused by: java.lang.IllegalStateException: InjectionManagerFactory not found.

I need help with understanding how I can add different handlers into Jetty 11's 

ContextHandlerCollection and make it run successfully?

 

My server main method :

--------------------------

public static void main(String[] args) throws Exception {
    System.out.println("StartHFS");

    // Create and configure a ThreadPool.
    QueuedThreadPool threadPool = new QueuedThreadPool();
    threadPool.setName("server");

    // Create a Server instance.
    Server server = new Server(threadPool);

    // HTTP configuration and connection factory.
    HttpConfiguration httpConfig = new HttpConfiguration();
    HttpConnectionFactory http11 = new HttpConnectionFactory(httpConfig);

    // Create a ServerConnector to accept connections from clients.
    ServerConnector connector = new ServerConnector(server, 1, 1, http11);
    connector.setPort(8080);
    connector.setHost("0.0.0.0");
    connector.setAcceptQueueSize(128);
    server.addConnector(connector);

    addHandlers(server);

    // Start the Server so it starts accepting connections from clients.
    server.start();
    server.join();

    System.out.println("StartHFS DONE");
}

static void addHandlers(final Server server) throws Exception {
        ContextHandlerCollection contexts = new ContextHandlerCollection();
        server.setHandler(contexts);

        ContextHandler logHandler = new ContextHandler("/log");
        logHandler.setHandler(new LoggingHandler());
        contexts.addHandler(logHandler);

        ContextHandler helloHandler = new ContextHandler("/hello");
        helloHandler.setHandler(new HelloHandler());
        contexts.addHandler(helloHandler);

        ContextHandler apiHandler = new ContextHandler("/api");
        apiHandler.setHandler(new SampleApi());
        contexts.addHandler(apiHandler);
        ServletContextHandler ctx = new ServletContextHandler(ServletContextHandler.NO_SESSIONS);
        ctx.setContextPath("/");
        server.setHandler(ctx);
        ServletHolder servletHolder = ctx.addServlet(ServletContainer.class, "/rest/*");
        servletHolder.setInitOrder(1);
        servletHolder.setInitParameter("jersey.config.server.provider.packages", "com.cloudian.handlers");
}
--------------------------
My dependencies are from Jakarta 9 namespace (even for swagger-core/openapi3.0):
--------------------------
dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.0'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
    compile 'org.eclipse.jetty:jetty-server:11.0.0'
    compile 'org.eclipse.jetty:jetty-servlet:11.0.0'
    compile 'org.eclipse.jetty:jetty-util:11.0.0'
    implementation group: 'org.json', name: 'json', version: '20201115'

    // Jersey dependencies to setup jersey with Jetty
    implementation 'org.glassfish.jersey.containers:jersey-container-jetty-http:3.0.2'
    implementation 'org.glassfish.jersey.core:jersey-server:3.0.2'
    implementation 'org.glassfish.jersey.containers:jersey-container-servlet-core:3.0.2'

    // alternative to jaxrx.ws.rs for Jetty 11
    implementation 'jakarta.ws.rs:jakarta.ws.rs-api:3.0.0'

    // Swagger core dependencies
    implementation 'io.swagger.core.v3:swagger-jaxrs2-jakarta:2.1.9'
}
--------------------------
How do I solve this issue? How do I make Jetty run even after
adding servletContextHandler into ContextHandlerCollection? 
What is the mistake I am doing here? 

Best,

Aniruddha

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