Architecture

The original pieces of software provided are the meta and bootstrap frameworks.

meta is a full backend/frontend solution for building web-based client/server applications in any domain, hence its name.

bootstrap is a tool to build modules for installing and provisioning a system with software.

util is a collection basic Java/JavaScript building blocks used by all parts of the platform and in applications.

Source repositories

Fossil SCM repositories:

• platform
  • Monorepo containing all source code and bootstrap modules
• platform-bootstrap
  • Configurations for platform specific bootstrap modules
• platform-archetype Out of date / Obsolete with pl3
  • Archetype of a repository based on platform with sample application
• platform-archetype-bootstrap Out of date / Obsolete with pl3
  • Archetype of a bootstrap repository for customized bootstrap modules

If you just want to look at the source, download fossil binary and checkout the repositories:

fossil clone https://platform:platform@dev.rswk.ch/scm/platform

For a full walk-through, see the Setup How-To.

Objectives

• Automate what you can. Almost automated is better than nothing. Use automation as form of documentation
• Frequently update dependencies. Sometimes it's good to be on the bleeding edge
• Keep it simple, sometimes boring is better
• Minimize abstractions, dependencies and vendor lockin
• Remove cruft, YAGNI
• There are no solutions, only trade-offs
• Version numbers are a TL;DR for release notes

Code

• Use brackets for control flow statements

  if (...) {
      return ...;
  }
  return ...;
  

• Use brackets for functions/lambdas

  items.stream().filter((item) -> { // Java
      return ...;
  }).findFirst();
  
  items.filter((item) => item.isNew()); // JavaScript
  
  items.filter(function (item) { // JavaScript multiple lines
      return ...;
  });
  

• Order attributes, fields, parameters, properties, etc. in ASCII order

  public void login(final String password, final String user) ...
  
  enum ContactType {
      EMAIL, MAIL, PHONE
  }
  
  function (password, user) ...
  
  search({limit: 100, name: "Bob"});
  
  <form data-bind="submit: register" id="register" novalidate>
  

• Don't use preincrement/postincrement operators

  i = i + 1;
  

• Don't use negation !

  if (hasEnded == false) // Java
  if (hasEnded === false) // JavaScript
  if (Boolean(convertedValue) === false)
  

• Use < and <= for comparisons

  if (0 < limit && limit < 10) {}
  

• Use constants first in comparisons

  if (MARKER.equals(currentMarker)) {}
  

• Use log format with comma separated properties

  LOG.debug("message, property1={}, property2={}", property1, property2); // Java
  LOG.debug(`message, property1=${property1}, property2=${property2}`); // JavaScript
  

  • Lists should be output in format property3=[el1,el2,el3]
• Comments
  • Put effort into expressive code and use descriptive variable and method names
  • Comments are a last resort
  • Comments lie
  • Use // FIXME and // TODO

Documentation

• Maven Site
  • Contents of src/site
    • Explanations, how-to guides and tutorials
    • Boostrap module reference documentation in bootstrap.md
• JavaDoc
  • Reference documentation for Java code
  • Packages with package-info.java
    • Use for overview, architecture, etc.
  • Java files according to JavaDoc standards
• JSDoc
  • Reference documentation for JavaScript code
  • Module documentation (including screenshots for clients) in src/main/resources/web-doc.md
    • Optional JSDoc config in src/main/resources/web-doc-config.json
  • Individual modules with functions and so on according to JSDoc standards

Build

• All artifacts are built with Maven, or by Maven triggering NPM for JavaScript modules
• Java JAR artifacts
  • JAR is based on a single Maven module
  • Code is structured into Java packages in src/main/java
  • Module dependencies are handled by Maven in pom.xml
    • Dependency convergence is not allowed
  • Source is compiled and packaged as JAR/Shaded JAR
    • A source JAR is also generated and installed to the Maven repository
  • Test modules are regular Maven modules and seperated from the modules under test
  • JAR files are published to hosted Maven repository on Nexus server
• JavaScript
  • Code is structured into ES6 modules in src/main/js/modules with additional subdirectories
    • css for CSS
    • static for audio, images and other static files
  • Dependencies to other NPM packages are configured in src/main/resources/js/package.json
  • NPM packages are managed in a workspace using the top level package.json
  • Shell scripts in util-web, used in Maven build profiles
    • web-install
      • Run npm install
    • web-build
      • Run npm run build
    • web-publish
      • Run npm publish
    • web-doc
      • Run npm run doc
  • ZIP web application artifacts
    • Requires web-build.js script
      • Call esbuild to bundle resources
    • Static files are copied using maven-resources-plugin:copy-resources
    • Published to hosted Maven repository on Nexus server using maven-assembly-plugin with web-dist.xml assembly from util-web
    • During development
      • Run npm run build -- watch to start esbuild watch
      • Run mvn resources:copy-resources@web-build-resources to copy static files
  • NPM package artifacts
    • Published to hosted NPM registry on Nexus server using web-publish
• Bootstrap ZIP artifacts
  • ZIP is based on Maven module
  • Bootstrap resources are in src/main/resources/bootstrap
    • Some standard directories are expected, but all directories and files are packaged into the ZIP
      • config contains server and client configuration. These are usually files that contain variables (eg. {serverDomain}) that are replaced by specific values from bootstrap.json or environment variables during execution
      • definitions contains bootstrap definition JSON files that describe the installation process
      • fixture contains static files that are used as part of the installation, eg. shell scripts, static resources, etc.
  • Dependencies to other bootstrap module are resolved using Maven in pom.xml. The contents of these bootstrap modules become part of the final ZIP, so be aware of file name clashes. All files from these included modules can be referenced like they are part of the current bootstrap module
  • Dependencies on JAR and ZIP binary artifacts (or any other Maven artifact) are resolved by using maven-dependency-plugin. The articacts are copied into the bin directory in the final ZIP
• Documentation Maven Site
  • Site is configured/enabled on the root Maven module
    • Generated using maven-site-plugin
    • Configuration in reporting section of pom.xml
    • Site generation for sub modules is disabled using <maven.site.skip>true</maven.site.skip>
  • Aggregated JavaDoc is generated using maven-javadoc-plugin
  • JSDoc is generated by web-doc shell script in individual modules and written to src/site/resources/jsdoc of root Maven module

Test

• In general
  • Unit tests follow the pattern of

    /* Given */
    /* When */
    /* Then */
    

• JUnit Java tests
  • Unit, integration tests for Java code
  • Test classes are in a test package
    • Eg. for ch.rswk.util.core in ch.rswk.util.core.test
  • Test resources are in src/main/resources/fixture
  • Tests are run during build using maven-surefire-plugin/maven-failsafe-plugin
    • See Inclusions and Exclusions of Tests
• QUnit JavaScript tests
  • Unit tests for JavaScript code
  • Test suite is in src/main/js/qunit.html and test modules are imported and run in src/main/js/modules/tests.js
  • Test module is named after the module under test, eg. src/main/js/modules/client-test.js for client module
  • Tests are run in WebDriver UI tests, see below
• WebDriver UI tests
  • Selenium WebDriver based tests in Java
  • WebDriverTest classes are in test package and extend AbstractWebDriver
  • Tests run as part of JUnit suite
• Bootstrap provisioning tests
  • BootstrapTest classes are in test package and extend AbstractBootstrapTest
  • Tests are not run as part of CI builds, but used as a manual tool to test bootstrap modules
  • Each test case
    • Builds bootstrap module for target environment
    • Creates and provisions new server instance with module
    • Deletes server instance when done

Commit

Checklist:

• Tests green?
  • Tests for new code?
• Changed configurations?
  • Adapt bootstrap configurations
• Documentation updated?
• Release notes updated?

Commit message format:

Most important thing I did in this commit, a good summary of my changes.

- List of things that changed
- More stuff

Release

• platform
  • This also applies to repositories based on the platform, like platform-archetype
  • SCM branches
    • trunk
      • Development happens here
      • Always compiles
      • Tests are green
    • stable
      • Manually merge/graft commits from trunk
      • No development, just minor commits (release notes, fixes)
    • Creating more branches is always an option
  • CI jobs
    • platform-snapshot
      • Build, test and deploy contents of trunk to Nexus
    • platform-release
      • Build, test and deploy contents of stable to Nexus
      • Manual steps are required in preparation of and after a release, see Release document
• platform-bootstrap
  • This also applies to bootstrap repositories based on the platform, like platform-archetype-bootstrap
  • SCM branches
    • trunk
      • Root directory per customer, eg. customerone
      • One root directory for the organization itself, eg. mycompany for infrastructure and development bootstrap modules
      • Root directories contain one directory per bootstrap module, eg. bootstrap-myapp-server
      • Bootstrap module directory contains the Jenkins job configuration, build/provision JSON configs and optional customizing files
  • CI jobs
    • One per bootstrap module, eg. bootstrap-myapp-server
    • Parameters for build (update/install), customer, etc.

Bootstrap dev-vm

Bootstrap watchdog-server

• Watchdog is a central meta-engine instance with meta-admin client that is used for monitoring and maintenance for other meta-engine based servers in an organization
• It is not required for other engines to work, but it is required for automated provisioning of bootstrap modules, either for testing with BootstrapTest or for Jenkins jobs that deploy bootstrap modules
• Setup Ubuntu VM, eg. with Vultr or any cloud computing provider
• Setup a DNS A record for domain you control that points to the IP of the VM
  • Vultr offers a free DNS service
• Example domain used for watchdog server is watchdog.mycompany.ch
  • Replace all instances in platform-archetype-bootstrap of this with a domain you control and would like to use
• Build bootstrap-watchdog-server module in IDEA
  • In platform project under framework/bootstrap/bootstrap-core, right click on Main.java > Modify Run Configuration
  • Name Main Watchdog
  • Program arguments (On Linux, use ~/scm/ instead of C:/scm)

    -build C:/scm/platform-archetype-bootstrap/mycompany/bootstrap-watchdog-server/build.json
    -customize C:/scm/platform-archetype-bootstrap/mycompany/bootstrap-watchdog-server
    -merge C:/scm/platform-archetype-bootstrap/mycompany/bootstrap-watchdog-server/bootstrap_install.json
    -module C:/scm/platform/bootstrap/bootstrap-watchdog-server
    

  • Environment variables for variables in bootstrap.json

    EMAIL_PASSWORD=my_email_password;
    WATCHDOG_PW=my_watchdog_user_pw;
    

Bootstrap myapp-server

• Let's try automated provisioning with BootstrapTest using the watchdog server we just setup
• BootstrapTest (which uses Provision class under the hood) uses cloud computing provider Vultr to create and deploy VMs. See Vultr Cheatsheet
• In IDEA, open BootstrapTest in platform-archetype/bootstrap/bootstrap-test
  • Remove @Disabled annotation
  • This test uses localhost.platform.rswk.ch domain in configuration files. To access the server after installation, open your local hosts file and temporarily change the entry for localhost.platform.rswk.ch to the IP of the deployed VM
    • Linux /etc/hosts
    • Windows C:/Windows/System32/drivers/etc/hosts
  • Test can also run with real domains
    • Setup DNS A record for a reserved IP with Vultr
      • Set keystoreFile in propecrties map to AbstractBootstrapTest.CERTBOT_KEYSTORE_FILE
      • Set serverDomain in properties map, eg. to test.mycompany.ch
      • Pass certbot flag to newProvisionTestExecuteConfig method
      • Set provisiontest_vultr_reservedip to the reserved IP ID
• Right click on BootstrapTest.java > Modify Run Configuration
  • Name BootstrapTest MyAppServer
  • Environment variables

    provisiontest_vultr_apikey=XXX;
    provisiontest_vultr_firewall=XXX;
    provisiontest_vultr_reservedip=;
    provisiontest_vultr_serverpassword=Hu3m4?mFKk2S9!=;
    provisiontest_vultr_sshkey=XXX;
    provisiontest_watchdog_engine=watchdog.mycompany.ch;
    provisiontest_watchdog_password=my_watchdog_user_pw;
    provisiontest_watchdog_user=watchdog;
    

  • All XXX above need to be replaced with actual values from your Vultr settings. See Vultr Cheatsheet
• Set a breakpoint in myAppServer on assertWatchdogStatus call
• When breakpoint is reached, the server should be up and running and the client accessible at https://localhost.platform.rswk.ch (or the domain you specified)
  • Check your watchdog server. It should have received the installation status of the new server with a log of the bootstrap process
• Resume the debugging session and the test resources are cleaned up. If everything went as expected, the test should continue to provision the next target environment

Bootstrap dev-server

For professional software development, it's recommended to setup a development server where all the source repositories, automated CI/CD builds and binary artifacts can be managed/stored.

• Setup Ubuntu VM, eg. with Vultr, another cloud computing provider, or even a local hypervisor software if you want to run the server on premise
• Setup a DNS A record for domain you control that points to the IP of the VM
• Example domain used for development server is dev.mycompany.ch
  • Replace all instances of dev.mycompany.ch in platform-archetype-bootstrap with the domain you control and would like to use
• To just test the setup of a development server, you can run BootstrapTest#devServer in platform/bootstrap/bootstrap-test, like we did with myapp-server
• Build bootstrap-dev-server module in IDEA
  • In platform project under framework/bootstrap/bootstrap-core, right click on Main.java > Modify Run Configuration
  • Name Main DevServer
  • Program arguments

    -build C:/scm/platform-archetype-bootstrap/mycompany/bootstrap-dev-server/build.json
    -customize C:/scm/platform-archetype-bootstrap/mycompany/bootstrap-dev-server
    -module C:/scm/platform/bootstrap/bootstrap-dev-server
    

  • Environment variables used in boostrap.json

    NEXUS_PW=my_nexus_admin_password;
    

Turtles all the way down

• At this point we have setup
  • Developer machine
  • Development server
  • Watchdog server
• But all of this was done from the local developer machine. With the development server, we can now store and build everything from a central place and get other people setup as well
• Clone the mycompany and mycompany-boostrap repositories to your local machine
  • Copy contents of platform-archetype to mycompany and platform-archetype-bootstrap to mycompany-boostrap
  • Rename artifacts, packages, etc. to match your organization
  • Commit changes to server
• Adapt CI jobs in Jenkins to match your organization
  • Repository and job names
  • bootstrap-dev-vm
    • Build bootstrap module for developer machines based on the customizing in platform-archetype-bootstrap/mycompany/bootstrap-dev-vm
  • bootstrap-dev-server
    • Build bootstrap module for development server based on the customizing in platform-archetype-bootstrap/mycompany/bootstrap-dev-server
  • bootstrap-watchdog-server
    • Build bootstrap module for watchdog server with customizing in platform-archetype-bootstrap/mycompany/bootstrap-watchdog-server
      • Set BUILD param to install to build the module. Must be manually installed on a new watchdog server, since provisioning depends on a watchdog server
      • Set BUILD param to update to build the module and deploy it to existing watchdog server
  • bootstrap-myapp-server
    • Example to build and provision a customer myapp server.
      • Set CUSTOMER param to customerone to build job with customizing in platform-archetype-bootstrap/customerone/bootstrap-myapp-server
      • Set BUILD param to install to provision a new server using Vultr
      • Set BUILD param to update to update an existing server to a new version
  • bootstrap-myapp-cd
    • Example for continuous delivery job. Updates all myapp servers that run compatible, old version to a new release version

Keystores

• Java keystore list certificates

  keytool -v -list -keystore keystore.pfx
  

• Java keystore import existing keystore (see below how to create PFX from PEM files)

  keytool -importkeystore -deststorepass 123 -destkeystore keystore.pfx -srckeystore tmpkeystore.pfx -srcstoretype PKCS12
  

• Java keystore remove certificate

  keytool -delete -alias server -keystore keystore.pfx
  

• Install OpenSSL, eg. see bootstrap definition platform/bootstrap/bootstrap-common/src/main/resources/bootstrap/definitions/openssl.json
• Configuration

  set RANDFILE=C:\data\openssl.rnd
  set OPENSSL_CONF=C:\tool\httpd\conf\openssl.cnf
  

• Convert PEM certificate and key to Java keystore

  openssl pkcs12 -export -in server.crt -inkey server.key -out tmpkeystore.pfx -name server -password pass:123
  

• Export PEM certificates from Java keystore

  openssl pkcs12 -in keystore.pfx -out keystore.pem -nodes
  

• Self signed CA and server certificate with SAN
  • Adapt configuration in openssl.cnf

    [ req ]
    req_extensions = v3_req
    [ v3_req ]
    basicConstraints = CA:FALSE
    keyUsage = digitalSignature, keyEncipherment
    subjectAltName = @alt_names
    [ alt_names ]
    DNS.1 = myapp.com
    [ v3_ca ]
    authorityKeyIdentifier = keyid,issuer
    basicConstraints = critical,CA:true,pathlen:3
    keyUsage = critical, cRLSign, keyCertSign
    nsCertType = sslCA, emailCA
    subjectKeyIdentifier = hash
    

  • Generate certificate

    openssl genrsa -out ca.key 2048
    openssl req -new -x509 -extensions v3_ca -days 720 -key ca.key -sha256 -out ca.crt
    openssl genrsa -out server.key 2048
    openssl req -extensions v3_req -sha256 -new -key server.key -out server.csr
    openssl x509 -req -extensions v3_req -days 720 -sha256 -in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out server.crt -extfile C:\tool\httpd\conf\openssl.cnf
    

• Links
  • https://stackoverflow.com/questions/50788043/how-to-trust-self-signed-localhost-certificates-on-linux-chrome-and-firefox
  • https://stackoverflow.com/questions/21488845/how-can-i-generate-a-self-signed-certificate-with-subjectaltname-using-openssl
  • JAR signing

Java

• Create runtime from JDK
  • Download JDK
  • Generate list of all .jmod files in jmod directory
    • Eg. with ls or java --list-modules
  • Run jlink
    • Start shell in bin directory
    • Replace XXX below with comma separated list of all modules (without .jmod)
    • Linux

      ./jlink --module-path ../jmods --add-modules "XXX"  --output /var/lib/platform/tool/java17
      

    • Windows

      .\jlink.exe --module-path ..\ --add-modules "XXX" --output C:\tool\java17
      

  • Create 7z archive from content of java17 directory
    • Linux java17-nix.7z
    • Windows java17-win.7z
  • Upload to platform dev server
• Zulu Mission Control
  • Open zmc.ini and add path to Java as first argument
    • Linux

      -vm
      /var/lib/platform/tool/jdk17/bin
      

    • Windows

      -vm
      C:/tool/jdk17/bin/server/jvm.dll
      

Links

• https://anthonyhobday.com/sideprojects/saferules/
• https://app.diagrams.net/
• https://basecamp.com/shapeup
• https://excalidraw.com/
• https://exiftool.org/
• https://freesound.org/
• https://input.fontbureau.com/download/
• https://regex101.com/
• https://regexper.com
• https://www.shellcheck.net/
• https://www.vultr.com/resources/developers/

Logging

• Java
  • Tests in platform
    • framework/util/util-core-test/src/main/resources/logback-test.xml
  • Tests in Engine modules
    • myapp-test/src/main/resources/logback-test.xml
  • In general
    • Add a logback.xml (or logback-test.xml) to src/main/resources
  • Runtime
    • For meta-engine in engine.json to overwrite the level of a logger

      "logging": {
          "loggers": {
              "ch.rswk.meta.engine": "DEBUG"
          }
      }
      

• JavaScript based on util-web
  • In config.js set debug: true
  • QUnit tests

    Logger.useDefaults({
        defaultLevel: Logger.DEBUG
    });
    

  • Clients using meta-client/logging with meta-admin
    • Notifications > Send client notification
      • Any channel the client is subscribed to
      • Action INFO
      • Data {"logLevel": "DEBUG"}

Lucene

• Inspect index with Luke
  • Download latest Lucene distribution
  • Extract ZIP and set JAVA_HOME in Luke shell scripts
    • Linux luke/luke.sh set $JAVA_HOME/bin/java
    • Windows luke\luke.bat set %JAVA_HOME%\bin\java
  • Run shell script
• Re-index existing index, eg. after new Lucene version
  • Use clone task from EngineUpdater
    • Using engine-clone.json from a bootstrap module
    • Using IDEA JUnit MainTest.update test method with changed newMetaServiceTestConfig (see below)
• Re-index existing index, eg. after changes to meta model
  • Implement MetaUpdater/MetaUserUpdater to migrate existing entities with the clone task
  • See EngineUpdaterSchemaTest.java
• Test with existing index
  • Get copy of index you would like to run locally
    • Manually create a 7z-file from an existing work directory
    • Or backup and download index with meta-admin > File > Search backups
  • Upload in local meta-admin > File
    • Enter correct tags, eg. for MetaService: backup,ch.rswk.meta.engine.MetaService
  • Use restore function on uploaded file
• Alternative way to test with existing index
  • Extract/copy index to a local directory, eg. C:/tmp/index/work
  • In MetaServiceTest.newMetaServiceTestConfig, set luceneIndexDir to parent directory, eg. C:/tmp/index
  • When running MetaServiceTest, make sure to disable cleanup in teardown

Maven

• Default goals for platform parent are set to clean install
• Only build current module and not full reactor mvn -N
• Run specific test
  • mvn -DfailIfNoTests=false -Dtest=MyTest
  • mvn -DfailIfNoTests=false -Dtest=ch.rswk.meta.core.*.*Test
• Skip tests mvn -DskipTests
• Only build certain modules mvn -pl meta-core,meta-client
• Only build certain module, including dependencies mvn -pl meta-engine -am
• List module dependency tree mvn dependency:tree
• Upload third party artifact to Nexus

  mvn deploy:deploy-file -DgroupId='ch.othercompany' -DartifactId=theframework -Dversion='1.0.0' -Dpackaging=jar -Dfile='theframework.jar' \
  -DgeneratePom=true -DrepositoryId=dev-server -Durl=https://dev.mycompany.ch/nexus/repository/thirdparty/
  

  • Use -DpomFile='theframework.pom' instead of -DgeneratePom=true to provide your own POM

Vultr

• Account
  • API
    • Enable API and store key somewhere safe
      • Used in provision config
    • Add IP/subnets that are going to call the API to access control (dev machines, dev servers, etc.)
  • SSH Keys
    • Generate new keys
      • Linux
        • ssh-keygen -f ~/.ssh/vultr_rsa
        • cat ~/.ssh/vultr_rsa.pub
      • Windows
        • Bitvise SSH Client > Client key manager > Generate new
        • Enter passphrase > Generate
        • Export > Export public key > OpenSSH format
    • Add SSH Key
    • Copy id query parameter from URL and store somewhere safe
      • Used in provision config
• Products > Firewall > Add Firewall Gruop
  • Accept SSH from your IP
  • Accept MS RDP from your IP
  • Accept HTTP, HTTPS from anywhere
  • Copy Group ID and store somewhere safe
    • Used in provision config
• Products > Network > Reserved IPs
  • Add for domains with fixed DNS A records and store
  • Copy id query parameter from URL and store somewhere safe
    • Used in provision config

Web

• Development
  • In WebDriverTest, put breakpoint on first line after runUiTest(...). In IDEA, make sure to set breakpoint Suspend to Thread
  • Use Chromium/Firefox instance opened by the WebDriverTest for client development
  • If you need to access any service

    runtime.getServices(MockGatewayService.class).get(0)
    

• Service workers
  • Force reload and refresh without using dev tools
    • In config.js/config.json change version
    • In worker-init.js change version in comment on first line
• URL for tests with ch.rswk.util.web.test.WebServer

  https://localhost.platform.rswk.ch:8088/qunit.html
  

• URL for tests with meta-engine and HttpService

  https://localhost.platform.rswk.ch:9090/
  

• Execute action via REST-like API from shell
  • Linux Bash

    #!/bin/bash
    EXECUTE_REQUEST='{"actionId":"myaction","param":{},"reqt":"ecq"}'
    RESPONSE=$(curl -s --fail --header "Accept:application/json" \
    --header "Authorization:Bearer $(curl https://myapp.mycompany.ch/rs/token -s --data "user=myuser" --data "password=pw123")" \
    --header "Content-Type:application/json" --data "$EXECUTE_REQUEST" \
    --request POST https://myapp.mycompany.ch/rs/execute)
    if [ $? -eq 22 ]; then
        echo "Error"
    else
        echo "$RESPONSE"
    fi
    

  • Windows PowerShell/Terminal

    $executeRequest = @{
        actionId = 'myaction'
        param = @{}
        reqt = 'ecq'
    }
    $headers = @{
        'Accept' = 'application/json'
        'Authorization' = $("Bearer " + (Invoke-WebRequest -Body @{user='myuser';password='pw123'} -Method 'POST' -Uri https://myapp.mycompany.ch/rs/token))
        'Content-Type' = 'application/json'
    }
    try {
        $response = Invoke-WebRequest -Body ($executeRequest | ConvertTo-Json) -Headers $headers -Method 'POST' -Uri https://myapp.mycompany.ch/rs/execute
        echo $response
    } catch {
        $err = $_.Exception
        echo $err.Response
    }
    

Disclaimer

• Highcharts is only free for non-commercial use. If you plan to use it in a commercial setting, please buy a license
• SMS delivery in GatewayService depends on an external provider based in Switzerland: iNetWorx SMS-Gateway. Please contact them to order a SMS package. No affiliation with iNetWorx, just happy customers for many years
• Automated provisioning of bootstrap modules depends on having an account with Vultr. We would like to add more providers in the future, but are happy right now with the simplicity, functionality and pricing provided. Again, no affiliation with Vultr

DevOps

• 7-Zip
• Bitvise SSH Client
• Certbot
• Chromium
• Ditto
• Firefox
• Fossil
• httpd
• IDEA
• Jenkins
• KDiff3
• KeePass
• klogg
• Maven
• Nexus
• Node.js
• NSSM
• OpenSSL (Win64OpenSSL)
• Selenium
• Ubuntu
• Visual Studio Code
• Vultr
• WinMerge
• Zulu OpenJDK

Backend

• c3p0
• Dagger
• Guava
• Jackson
• Java JWT
• JDBI
• Jersey
• Jetty
• JSON Schema Validator
• JUnit
• Logback
• Lucene
• Metrics
• RxJava
• Scrypt
• SQLite (xerial/sqlite-jdbc)
• WebAuthn

Frontend

• Bootstrap
• Bootstrap Icons
• esbuild
• FileSaver.js
• Highcharts
• i18next
• js-Logger
• Knockout
• Leaflet
• Luxon
• Mergician
• QR Code generator
• QUnit
• Underscore
• ZXing