Conventions used

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

Code in text: 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: “Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system.”

A block of code is set as follows:

public interface RouterNetworkUseCase {
    Router addNetworkToRouter(RouterId,
    Network network);
    Router getRouter(RouterId routerId);
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

function getRouter() {
    const routerId = document.
    getElementById("routerId").value;
    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
        console.log(this.responseText);
        if (this.readyState == 4 && this.status == 200) {
            const json = JSON.parse(this.responseText)
            createTree(json)
        }

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

java -jar target/topology-inventory-1.0-SNAPSHOT-jar-with-dependencies.jar rest
REST endpoint listening on port 8080...
Topology & Inventory WebSocket started on port 8887...

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Select System info from the Administration panel.”

Tips or important notes

Appear like this.