armeria-0.41.0

New features

• #455 #465 Add RequestContext.onChild() which adds a callback that is invoked when a child context replaces the current context

  • This is useful especially when you want to inherit an attribute of the current context to its children:

    AttributeKey<UserInfo> CURRENT_USER = ...;
    RequestContext ctx = ...;
    ctx.onChild((curCtx, newCtx) -> {
        newCtx.attr(CURRENT_USER).set(curCtx.attr(CURRENT_USER).get());
    });

• #460 Add DynamicEndpointGroup which notifies its listeners when its list of Endpoints changes

  • HealthCheckedEndpointGroup and ZooKeeperEndpointGroup extends DynamicEndpointGroup.

• #471 Provide more simpler ways to write a decorating client/server

  • Add DecoratingClientFunction which is similar to DecoratingServiceFunction:

    ServerBuilder sb = new ServerBuilder();
    sb.serviceUnder("/my_service",
                    new MyService().decorate((delegate, ctx, req) -> {
                        // Intercept an incoming request here.
                        return delegate.serve(ctx, req);
                    });
    
    ClientBuilder cb = new ClientBuilder(...);
    cb.decorator(HttpRequest.class, HttpResponse.class,
                 (delegate, ctx, req) -> {
                     // Intercept an outgoing request here.
                     return delegate.execute(ctx, req);
                 });

  • Add SimpleDecoratingService and SimpleDecoratingClient, which is similar to DecoratingService and DecoratingClient but with fewer number of type parameters:

    public class MyDecoratingService extends SimpleDecoratingService<RpcRequest, RpcResponse> { ... }
    public class MyDecoratingClient extends SimpleDecoratingClient<RpcRequest, RpcResponse> { ... }

Improvements

• (Potentially breaking) #457 Cancel context-aware callbacks automatically if the context has been timed out already

Bug fixes

• #458 #464 Choose correct SerializationFormat when content-type is application/x-thrift without the protocol parameter
• #462 #463 NullPointerException at ServiceRequestContext.toString()
• #466 Handle FilteredHttpResponse completion callbacks correctly in the case of no encoding