Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "All Subscribe methods return a Disposable type. This type can also be used to cancel the subscription."

A block of code is set as follows:

public interface Publisher<T> {
    public void subscribe(Subscriber<? super T> s);
}

Any command-line input or output is written as follows:

gradlew bootrun

Bold: Indicates a new term, an important word, or words that you see onscreen.