Skip to main content

vertx command line parameters

How to pass command line parameters to "vertx run"

Context

I'm using continuous delivery and need to checkout a git branch then launch the verticle with a parameter.
For example:
  1. I chekcout the "demo" git branch
  2. I deploy it to the target
  3. I remotely run the verticle with "vertx run 'demo'" (this actually doesn't work, but it illustrates my needs)

The solution: use system environment variables

The documentation https://vertx.io/docs/vertx-config/java/ is mentionning it, but it was not straight to me, so here is precisely how I did:

package org.rktmb.vertx
// ...
import io.vertx.config.ConfigStoreOptions;
import io.vertx.config.ConfigRetriever;
import io.vertx.config.ConfigRetrieverOptions;
// ...

public class MainVerticle extends SyncVerticle {
    @Override
    public void start(Future startFuture) throws Exception {
 // ...
        ConfigStoreOptions jsonEnvConfig = new ConfigStoreOptions().setType("env")
            .setConfig(new JsonObject().put("keys", new JsonArray().add("VXBRANCH").add("VXPORT")));
        ConfigRetrieverOptions myOptions = new ConfigRetrieverOptions().addStore(jsonEnvConfig);
        ConfigRetriever myConfigRetriver = ConfigRetriever.create(vertx, myOptions);
        myConfigRetriver.getConfig(asyncResults -> System.out.println(asyncResults.result().encodePrettily()));
 // ..
    }
}
Then, when running the verticle
VXPORT="123" VXBRANCH="prod"  vertx run --classpath=target/test-1.0.0-SNAPSHOT-fat.jar org.rktmb.vertx.MainVerticle
This displays:
{
  "VXBRANCH" : "prod",
  "VXPORT" : 123.0
}

If I ever change the environment variables: the rendered JSON changes accordingly.

Popular posts from this blog

npm run build base-href

Using NPM to specify base-href When building an Angular application, people usually use "ng" and pass arguments to that invocation. Typically, when wanting to hard code "base-href" in "index.html", one will issue: ng build --base-href='https://ngx.rktmb.org/foo' I used to build my angular apps through Bamboo or Jenkins and they have a "npm" plugin. I got the habit to build the application with "npm run build" before deploying it. But the development team once asked me to set the "--base-href='https://ngx.rktmb.org/foo'" parameter. npm run build --base-href='https://ngx.rktmb.org/foo did not set the base href in indext.html After looking for a while, I found https://github.com/angular/angular-cli/issues/13560 where it says: You need to use −− to pass arguments to npm scripts. This did the job! The command to issue is then: npm run build -- --base-href='https://ngx.rktmb.org/foo&

Jenkins invalid privatekey

Publish over SSH, Message "invalid privatekey:" With quite recent (June-July 2020) installations of Jenkins and OpenSSH, I have the following error message when using the "Deploy overs SSH" Jenkins plug-in and publishing artifacts to the target overs SSH: jenkins.plugins.publish_over.BapPublisherException: Failed to add SSH key. Message [invalid privatekey: [B@d8d395a] This problem seems to be referenced here: https://issues.jenkins-ci.org/browse/JENKINS-57495 Just regenerate a key with the right parameters To solve it: ssh-keygen -t rsa -b 4096 Or ssh-keygen -t rsa -b 4096 -m PEM

Emacs TypeScript Development

Emacs Configuration for Typescript In order to comfortably develop on Node, React or Angular projects with Emacs, TIDE is a good solution. We have TypeScript code highlight (that is the minimum!) and code completion based on the codebase (not only on locally defined and builtins) In order to achieve that: Install Emacs (24+) Install Node Install Typescript (which will provide "tsserver") Install TIDE and some usefull dependencies Configure Emacs to use all those Node is then installed in " /home/mihamina/Apps/node-v12.18.0-linux-x64/bin ": you should add it to your PATH. Installing Typescript is done with: npm install --save typescript @types/browserify After that, "tsserver" will be in " /home/mihamina/node_modules/.bin " Then comes the installation of TIDE: With the Emacs package manager, M-x package-install , install "tide". Do the same for "web-mode", "flycheck", "company" "js2-mode" and "