From here.

Two diagram tools are introduced in this post.

This post is about using docker-machine to create, use and manage a Docker host inside of a local virtual machine. From here.

The content of this post is from here.

Ratpack is a lightweight web framework written in Java and Groovy.

From here and here.

Groovy Grape is Groovy’s dependency manager. A big difference between Grape and other language dependency managers like pip, gem and npm is that, it uses language element(annoation, method call) to describe the dependencies inside a Groovy file, rather than a file out of the program itself like “requirements.txt”, “Gemfile” and “package.json”.

From here.

From here.

I see code like this:

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@Override
public void log(Request request) {
    // ...
}

@Override
public void submit(Request request) {
    Utils.submit(request, request -> log(request));
}

Here is the code in “Utils.java”:

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public static void submit(Request request, Consumer<Request> comsumer) {
    // Do something.
    comsumer.accept(request);
}

“request -> log(request)” is a lambda expression, but how does it become a “Consumer”?