Please see my responses inline below:
On Wednesday, July 5, 2017 at 6:21:00 PM UTC-4, Flavio Silveira wrote:
>
>
>
> quarta-feira, 5 de Julho de 2017 às 18:57:22 UTC-3, Douglas Patriarche
> escreveu:
>>
>> Hi Flavio,
>>
>> Yes, that sounds like a sane structure for organizing assets. If you are
>> using Maven to manage your project, then your web-visible assets should be
>> under the <project>/src/main/resources directory, e.g.:
>>
>> <project>/src/main/resources/assets/js
>> <project>/src/main/resources/assets/css
>> <project>/src/main/resources/assets/html
>>
>>
>> You can then configure your application to serve static assets using
>> a ConfiguredAssetsBundle like this:
>>
>> public class MyApplication extends Application<MyAppConfiguration> {
>> // ...
>> @Override
>> public void initialize(final Bootstrap<MyAppConfiguration> bootstrap)
>> {
>> bootstrap.addBundle(new ViewBundle<>());
>> bootstrap.addBundle(new ConfiguredAssetsBundle("/assets/",
>> "/assets/", "index.html", "assets"));
>> bootstrap.addBundle(new ConfiguredAssetsBundle(
>> "/META-INF/resources/webjars", "/webjars", "index.html", "webjars"));
>> }
>> // ...
>> }
>>
>> You can configure multiple ConfiguredAssetsBundles, as seen above. The
>> second instance allows you to add WebJars <http://www.webjars.org> for
>> almost any JS/CSS library you might need.
>>
>> For a Metrics UI, I suggest you have a look at Grafana
>> <https://grafana.com> (for the UI) and Graphite
>> <https://github.com/graphite-project/graphite-web> (for the back-end
>> metrics service). To install Graphite, following the instructions here
>> <https://community.rackspace.com/products/f/25/t/6800>. Then install
>> Grafana, following the instructions here
>> <http://docs.grafana.org/installation/debian/>.
>>
>> I hope this helps.
>>
>> Regards,
>> Doug
>>
>
> Hi Douglas, thanks for your explanations!
>
> So the first line would be to tell Dropwizard that my resourcePath is
> /assets/, my uriPath is also /assets/, my indexFile is index.html and my
> assetsName is assets as seen here:
> https://github.com/dropwizard-bundles/dropwizard-configurable-assets-bundle/blob/master/src/main/java/io/dropwizard/bundles/assets/ConfiguredAssetsBundle.java#L173
>
> Is my assumption correct?
>
Yes, that's correct.
> About the second line, I would have to create directories
> /META-INF/resources/webjars inside /assets/ to have my webjars in
> /webjars/, again, am I following this through?
>
Actually, it's all taken care of for you, you don't need to do anything
other than create the ConfiguredAssetsBundle. With WebJars, the JS library
is packaged inside a jar file such that the static assets like .js and .css
files are stored inside the jar under the path
"/META-INF/resources/webjars". For example if you include JQuery in your
project:
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>1.12.4</version>
</dependency>
Then inside the jquery-1.12.4.jar the static assets are stored under the
path /META-INF/resources/webjars/jquery/1.12.4/... You can then load JQuery
in your web pages with:
<script src="/webjars/jquery/1.12.4/jquery.min.js"></script>
The exact file names and paths inside the WebJars vary, so you'll want to
explore inside the jar files to see what exactly is available. Eclipse
allows you to easily look inside "Maven Dependencies" files; other IDEs
probably do too.
> In regards to Metrics UI, I have an idea for a Metrics UI that would be
> easily integrated to Dropwizard and maybe in the future be part of the
> bundle package, without depending on 3rd party software and its
> dependencies.
> That's why I would like to know more about what is already there and where
> to see the possibility of extending and customizing it.
>
I think most people use Metrics by sending the metrics to an backend server
running Graphite or Ganglia or a commercial monitoring stack. Graphite +
Grafana is really good IMO. You can also access the raw metrics as JSON if
you access your app's adminConnector port with CURL or in a browser. If you
haven't looked at the adminConnector there are some basic utilities
available there:
$ curl -G http://localhost:8986
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd";>
<html>
<head>
<title>Metrics</title>
</head>
<body>
<h1>Operational Menu</h1>
<ul>
<li><a href="/metrics?pretty=true">Metrics</a></li>
<li><a href="/ping">Ping</a></li>
<li><a href="/threads">Threads</a></li>
<li><a href="/healthcheck?pretty=true">Healthcheck</a></li>
<li><a href="/pprof">CPU Profile</a></li>
<li><a href="/pprof?state=blocked">CPU Contention</a></li>
</ul>
</body>
</html>
It's pretty basic, though. It would certainly be nice if there was an
option, on development servers for example, to access the metrics in a
Grafana-like UI that was served directly by the Dropwizard-based app itself.
Regards,
Doug
Regards,
> Flavio Silveira
>
>
>
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