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Recently I needed to add a progress bar to a Java based terminal/console application and I used a specific library that I’d like to demonstrate in the following snippet. Figure 1. Terminal based Progress Bar for Java Dependencies Using Maven, we just need to add the following dependency: pom.xml <dependency> <groupId>me.tongfei</groupId> <artifactId>progressbar</artifactId> <version>0.7.3</version> </dependency> Sample Application The application shows how to set up the progress bar and how to advance its status by-one, by a given amount or to a specific number. ...

Install AWS CLI v2 $ curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64-2.0.30.zip" -o "awscliv2.zip" unzip awscliv2.zip sudo ./aws/install AWS Documentation Generate Signed URLs with Linux Tools e.g. for accessing a website behind a CloudFront distribution using a canned policy. Write the policy file policy { "Statement": [ { "Resource": "https://xxxxxxxxxxxx.cloudfront.net/", "Condition": { "DateLessThan": { "AWS:EpochTime": 1648293147 } } } ] } Then apply the following commands[1] - you need to have OpenSSL installed. cat policy | tr -d "\n" | (1) tr -d " \t\n\r" | (2) openssl sha1 -sign private_key.pem | (3) openssl base64 -A | (4) tr -- '+=/' '-_~' (5) ...

When it comes to writing microservices in Java, plenty of tools and frameworks exist. In the following tutorial, I’d like to demonstrate another minimalistic framework called Bootique by implementing a simple microservice exposing its functions either as a RESTful web-service or as a runnable command executed using the command line. Bootique Command Line Dependencies Using Maven here, we’re adding the following elements to our project’s pom.xml: Bootiques Bill of Materials as dependency management: bootique-bom Bootique Jersey for our REST service: bootique-jersey Bootique Logback for logging: bootique-logback Maven Shade Plugin to assemble our fat-jar ...

Extract Coordinates from the POM Helpful for build and integration environments, pipelines etc. Exctract the Project version from the pom.xml mvn org.apache.maven.plugins:maven-help-plugin:3.1.0:evaluate -Dexpression=project.version -q -DforceStdout Override a Property via local configuration e.g. to override the property xxx from your project’s pom.xml Create a directory .mvn in your project directory root Create a file named maven.config in this directory Insert -Dxxx=newvalue into the file to override this property Tip Don’t forget to add .mvn to your .gitignore! ...

Installation Installing rustup first…​ install rustup via shell script curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf | sh install rustup via brew brew install rustup-init (1) rustup-init (2) Welcome to Rust! [...] Current installation options: default host triple: aarch64-apple-darwin default toolchain: stable (default) profile: default modify PATH variable: yes 1) Proceed with standard installation (default - just press enter) 2) Customize installation 3) Cancel installation install rustup install rust binaries and add them to paths etc…​ ...