62mkv

Thoughts on how to add trusted store for connection to external sites that use that certificate for HTTPS

Option 1: global configuration

One can just provide the -Djavax.net.ssl.trustStore=<path/to/store> -Djavax.net.ssl.trustStorePassword=<password> options when running the Java application

However, this is not always possible (for example, when run in the cloud).

And if you want to use server.ssl.trust-store/server.ssl.trust-store-password options from Spring Boot, be aware that with those you also have to provide key-store options as well. And, basically that would be an abuse, because this configuration is specifically for server side of your application.

62mkv

Examples of SPARQL Wikidata queries:

List of hills in Estonia without defined elevation

SELECT ?item ?itemLabel ?geo ?elevation WHERE {
  ?item wdt:P31 wd:Q54050;
    wdt:P17 wd:Q191;
        wdt:P625 ?geo.
    OPTIONAL { ?item wdt:P2044 ?elevation }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "et" } 

62mkv

To wire-print requests/responses over HTTP for SOAP/XML:

-Dcom.sun.xml.ws.transport.http.client.HttpTransportPipe.dump=true -Dcom.sun.xml.ws.transport.http.HttpAdapter.dump=true -Dcom.sun.xml.internal.ws.transport.http.client.HttpTransportPipe.dump=true -Dcom.sun.xml.internal.ws.transport.http.HttpAdapter.dump=true -Dcom.sun.xml.internal.ws.transport.http.HttpAdapter.dumpTreshold=true

Snippet to quickly get Java system properties:

public class My {
  public static void main(String[] argc) {
 System.getProperties().stringPropertyNames().forEach(name -> System.out.println(name + "=" + System.getProperty(name)));

62mkv

Docker Desktop is not respecting proxy settings under Windows 10 Professional

SOLUTION:

• Option 1:configure Docker Desktop to use Manual proxy settings: the "whale" context menu / Settings / Resources / Proxies / Manual proxy configuration
• Option 2: (might work, didn't test) set HTTP_PROXY / HTTPS_PROXY / NO_PROXY as system environment variables, not user ones

In both cases, restart Docker Server

Original Problem:

62mkv

Getting help on any topic:

help _topic_

or

man _topic_

Read all lines from text file

62mkv

Ensure that root element of the XML file will contain something like this:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns2:PrintData xmlns:ns2="http://iopm.int.kn/iopm4xml/meta/v1.4" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://iopm.int.kn/iopm4xml/meta/v1.4 path/to/xsd/file/schema.xsd">

and then click F8

62mkv

The excerpt from logs:

 14:56:01.405 [Test worker] INFO  org.testcontainers.dockerclient.DockerClientProviderStrategy - Loaded org.testcontainers.dockerclient.EnvironmentAndSystemPropertyClientProviderStrategy from ~/.testcontainers.properties, will try it first
    14:56:01.942 [ducttape-0] DEBUG org.testcontainers.dockerclient.DockerClientProviderStrategy - Pinging docker daemon...
    14:56:01.987 [ducttape-0] DEBUG com.github.dockerjava.core.command.AbstrDockerCmd - Cmd: 
    14:56:02.699 [ducttape-0] DEBUG org.testcontainers.dockerclient.DockerClientProviderStrategy - Pinging docker daemon...
    14:56:02.699 [ducttape-0] DEBUG com.github.dockerjava.core.command.AbstrDockerCmd - Cmd: 
    14:56:03.200 [ducttape-0] DEBUG org.testcontainers.dockerclient.DockerClientProviderStrategy - Pinging docker daemon...
    14:56:03.209 [ducttape-0] DEBUG com.github.dockerjava.core.command.AbstrDockerCmd - Cmd: 
    14:56:03.712 [ducttape-0] DEBUG org.testcontainers.dockerclient.DockerClientProviderStrategy - Pin

62mkv

Tests verbosity

Executing gradle commands with -i seem to seriously enhance debugging experience, especially when tests are failing to initialize (as if when Testcontainers fail to connect to Docker daemon) and there're almost no logs in the JUnit XML reports

./gradlew -i clean test

Also see here: https://docs.gradle.org/current/userguide/java_testing.html

62mkv

Today I've run into situation where some of the tests started failing randomly. Sometimes, 3 times in a row they could be executed successfully, but then would fail.

In order to collect more statistics I created this test.bat:

for /L %%i in (1,1,10) do (
   gradlew clean test
   zip -r0q build%%i build/ 
)

62mkv

/* real-world example */

select xpath('/ns2:PrintData/Meta/Document/@id', xmlparse (document payload),
             ARRAY[ARRAY['ns2', 'http://iopm.int.kn/iopm4xml/meta/v1.4']]) from request_history_step_payload rhsp 
join request_history_step rhs on rhs.step_uuid  = rhsp.step_uuid 
where rhs.step_type = 'PRINTER_REQUEST' and rhs.started_at between '2020-05-19' and now()