We Keep Coding

"swagger-codegen-maven-plugin:3.0.0 or one of its dependencies could not be resolved"

UPDATE: I see on this URL https://repo1.maven.org/maven2/io/swagger/swagger-codegen-maven-plugin/
that the only version of swagger codegen is 3.0.0-rc1
I'm trying to build a REST API with Java/SpringBoot and using the swagger-codegen plugin. I am able to use the plugin version of swagger codegen 2.3.1, it downloads fine for some reason.
However, I am trying to use Open api spec 3.0, and 2.3.1 would NOT work, and I found on Stackoverflow people saying I need to use 3.X.X of swagger-codegen to use open api spec 3.0.
So I changed the plugin version to 3.0.0, and 3.0.25 and many different versions but it keeps failing no matter what I do:
[ERROR] Plugin io.swagger:swagger-codegen-maven-plugin:3.0.0 or one of its dependencies could not be resolved: Could not find artifact io.swagger:swagger-codegen-maven-plugin:jar:3.0.0 in central (https://repo1.maven.org/maven2) -> [Help 1]
org.apache.maven.plugin.PluginResolutionException: Plugin io.swagger:swagger-codegen-maven-plugin:3.0.0 or one of its dependencies could not be resolved: Could not find artifact io.swagger:swagger-codegen-maven-plugin:jar:3.0.0 in central (https://repo1.maven.org/maven2)
I was playing around with my settings.xml file and pom.xml but nothing seems to work. I'm confused because this JAR is on maven central, so it should be easily downloaded, correct? Also, I tried adding it as both a dependency AND plugin, and the dependency seems to be downloaded fine (even version 3.0.25), its just the plugin that fails all the time.
I will say I'm on a work computer being a proxy, but I added that info to the settings.xml - could that be related?
my pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.mydomain.me</groupId>
<artifactId>my-api</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>My API</name>
<description>Version 2.0 of my API</description>
<properties>
<java.version>11</java.version>
</properties>
<pluginRepositories>
<pluginRepository>
<id>central</id>
<name>Maven Central</name>
<layout>default</layout>
<url>https://repo1.maven.org/maven2</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.swagger.codegen.v3</groupId>
<artifactId>swagger-codegen-cli</artifactId>
<version>3.0.25</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>io.swagger</groupId>
<artifactId>swagger-codegen-maven-plugin</artifactId>
<version>3.0.25</version>
<executions>
<execution>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<inputSpec>${project.basedir}/src/main/resources/api.yaml</inputSpec>
<output>${project.basedir}/target/generated-sources</output>
<language>java</language>
<configOptions>
<sourceFolder>src/gen/java/main</sourceFolder>
</configOptions>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

I don't know if it helps, but I was facing a similar problem. The thing is that the dependency was downloaded to the .m2 folder, but it was not reflecting on Maven Dependencies inside Libraries in Eclipse. So I ran this command inside the project where I needed the plugin: mvn swagger-codegen:generate. And then the files I needed were generated. I have no idea why the plugin wasn't being showed in Eclipse, but somehow it was there, hidden.

The groupId of swagger-codegen-maven-plugin has changed. Should be:
<plugin>
<groupId>io.swagger.codegen.v3</groupId>
<artifactId>swagger-codegen-maven-plugin</artifactId>
<version>3.0.35</version>
<plugin>

Exporting Spring Cloud Sleuth spans automatically using Azure Monitor OpenTelemetry Exporter client library for Java

I'm trying to use Azure Monitor OpenTelemetry Exporter client library for Java to export all traces/spans from Spring Cloud Sleuth to Azure Monitor. This integration seems to only work with the newest version of Spring Cloud Sleuth after the recent dependency version updates.
However instead of using azureMonitorExporter.export(spanData) manually, I would like to export all traces/spans automatically for the whole application by just adding a configuration for Azure exporter. This could then easily be added to a new project.
I don't have much experience using Spring/Sleuth/OpenTelemetry, but AzureMonitorExporter implements SpanExporter, so I thought one option could be to create a configuration class that contains the following.
#Bean
public SpanExporter exporter() {
return new AzureMonitorExporterBuilder()
.instrumentationKey("{KEY}")
.buildExporter();
};
And then it could be used in the main class using:
#Autowired
SpanExporter exporter;
However I'm not sure if this is the right way or how to continue from here to actually get the exporter to start exporting traces/spans automatically to Azure monitor.
My pom.xml looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.2-SNAPSHOT</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>trace-demo-5-updated</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>trace-demo-5-updated</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
<spring-cloud.version>2020.0.0-SNAPSHOT</spring-cloud.version>
</properties>
<dependencies>
<!-- Sleuth with Brave tracer implementation -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.azure</groupId>
<artifactId>opentelemetry-exporters-azuremonitor</artifactId>
<version>1.0.0-beta.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web-services</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-sleuth-otel</artifactId>
<version>3.0.0-M6</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</pluginRepository>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>

Update (2020-01-26):
With today's release of Spring Cloud Sleuth OTel (spring-cloud-sleuth-otel:1.0.0-M3) and The OTel upgrade in the Azure SDK, your original issue should disappear.
Original Answer
(TL;DR: last paragraph)
The Sleuth 3.0 Migration Guide can help you out a lot here. Sleuth supports two tracing systems Brave (default) and OpenTelemetry (incubator).
In order to use OpenTelemetry, you need to remove Brave (just exclude spring-cloud-sleuth-brave) and add OpenTelemetry (spring-cloud-sleuth-otel-autoconfigure with spring-cloud-sleuth-otel-dependencies). See the docs I linked.
After you do this, your SpanExporter should be used, here's a pom.xml I created based on yours. Btw, adding a sample project (e.g.: in a GitHub repo) could help a lot for everyone who is trying to help so that they don't need to create one themselves.
Unfortunately, this still won't work, you will still face with this exception at startup:
Caused by: java.lang.ClassNotFoundException: io.opentelemetry.common.AttributeValue
This is because opentelemetry-exporters-azuremonitor:1.0.0-beta.1 depends on OpenTelemetry 0.8.0 while the latest spring-cloud-sleuth-otel (1.0.0-M2, we released it today) is using the latest OpenTelemetry (0.13.1). Also, OpenTelemetry introduced breaking changes between minor versions, e.g.: the AttributeValue class was removed in OpenTelemetry 0.9.1.
Sleuth supports OpenTelemetry since Sleuth 3.0.0-M5, The OpenTelemetry version was 0.10 back then so there is no Sleuth version available that would support an OpenTelemetry version as old as opentelemetry-exporters-azuremonitor:1.0.0-beta.1 needs.
So the solution would be fixing your pom.xml and opentelemetry-exporters-azuremonitor supporting the latest OpenTelemetry.

Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:3.1.0:clean (default-clean) on project spring-boot-keycloak

My application was working fine and i was able to do mvn clean install using <packaging>jar</packaging> and able to execute a jar file but i change it to war file and i was't able to do mvn clean install .
is there any deference between these too ? I looked for more solutions but with no luck
Error :
Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:3.1.0:clean (default-clean) on project spring-boot-keycloak: Failed to clean project: Failed to delete C:\Users\user\Documents\New folder\E.Services\target
My POM File :
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung.keycloak</groupId>
<artifactId>spring-boot-keycloak</artifactId>
<version>0.0.1</version>
<name>spring-boot-keycloak</name>
<packaging>war</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.keycloak.bom</groupId>
<artifactId>keycloak-adapter-bom</artifactId>
<version>3.3.0.Final</version>
<type>pom</type>
<scope>provided</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<-- Many dependencies -->
</dependencies>
<repositories>
<repository>
<id>central</id>
<name>Maven Plugin Repository</name>
<url>https://repo.maven.apache.org/maven2</url>
<layout>default</layout>
<snapshots>
<enabled>false</enabled>
</snapshots>
<releases>
<updatePolicy>never</updatePolicy>
</releases>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<executable>true</executable>
</configuration>
</plugin>
</plugins>
</build>
</project>

unable to delete target -- it's a file system issue a pretty common problem actually -- you probably have a file open or a Windows Explorer open in your ${project.home}/target directory...

it's a file system issue a pretty common problem actually -- you probably have a file open or a Windows Explorer open in your ${project.home}/target directory...

There can be many causes for this error. One of the main reasons could be that the directory maven is trying to delete is locked. Try to access the directory that maven is trying to delete. If you get a prompt like "the file or directory is corrupted or unreadable", try fixing disk errors. It worked for me. The steps I followed are:
Launch CMD on your Windows PC via the Start Menu. Right click on it
to run it as administrator.
Type chkdsk /f x: in the Command Prompt window and press Enter to
execute the command. X here is the drive letter of the corrupted
partition that you want to check. Please replace it with your own
drive letter.

Searching for spring dependecies

I'm a beginner in spring and I'm trying to develop a simple app however I'm struggling to find a tool which will help me find exactly what jars or what dependencies I should add to my project. I tried
http://search.maven.org/
It worked for some of the jars that I was looking for. It worked for the DriverManagerDataSource however it does not work for the
org.springframework.boot.SpringApplication;
To be more precise: Is there a tool that will tell me what jars I need for a specific import?
How can I know what jar I need in my build path for the following line of code to compile successfully?
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;

you are trying to use spring-boot, so read more about spring-boot here: getting started.
And see how it is done.
The simplest pom.xml you could have is something like this:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.0.0.RC3</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>http://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>

Making jar files (jira plugin)

I'm making plugin for Jira and found new problem. When I'm making .jar file - my PC makes it in a wrong way. At the same time, PC of my co-worker makes everithing perfect from the same source. What can be the problem? JDK version or Atlassian SDK? Or something else?
here is my pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.my_Plugin</groupId>
<artifactId>my_Plugin</artifactId>
<version>1.1.2</version>
<organization>
<name>Example company</name>
<url>http://example.com</url>
</organization>
<name>SmartAct</name>
<description>This plugin for Atlassian JIRA.</description>
<packaging>atlassian-plugin</packaging>
<dependencies>
<dependency>
<groupId>com.atlassian.jira</groupId>
<artifactId>jira-api</artifactId>
<version>${jira.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.atlassian.jira</groupId>
<artifactId>jira-core</artifactId>
<version>${jira.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.atlassian.activeobjects</groupId>
<artifactId>activeobjects-plugin</artifactId>
<version>0.19.16</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.atlassian.maven.plugins</groupId>
<artifactId>maven-jira-plugin</artifactId>
<version>${amps.version}</version>
<extensions>true</extensions>
<configuration>
<productVersion>${jira.version}</productVersion>
<productDataVersion>${jira.version}</productDataVersion>
<log4jProperties>src/log4j.properties</log4jProperties>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<jira.version>6.0.4</jira.version>
<amps.version>4.2.3</amps.version>
</properties>
<repositories>
<repository>
<id>saucelabs</id>
<url>http://repository-saucelabs.forge.cloudbees.com/release</url>
</repository>
<repository>
<id>atlassian maven1</id>
<url>https://maven.atlassian.com/maven1</url>
</repository>
<repository>
<id>atlassian old</id>
<url>https://maven.atlassian.com/content/groups/public</url>
</repository>
<repository>
<id>atlassian-public</id>
<url>https://m2proxy.atlassian.com/repository/public</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>atlassian-public</id>
<url>https://m2proxy.atlassian.com/repository/public</url>
</pluginRepository>
</pluginRepositories>

The shown pom.xml does not contain the closing tag, copy and paste mistake?
Never tried repository and pluginRepository inside my pom.xml, I always use the ~/.m2/settings.xml; are your url's reachable?
Does atlas-mvn dependency:tree list all jars or are sume "gone missing"?
Are you compiling manually or from within Eclipse/Netbeans/IntelliJ...? Mind you, the IDEs usually com with an (incompatible) Maven(3) version that breaks while compiling atlassian plugins 95% of the time. To be absolutely sure, run manually from the shell.
Your 'PC' might just have the wrong encoding. Usually Maven tells you while compiling what encoding it uses, UTF-8/ISO-8859-x/CP-1252/whatever and that this is platform dependant. Atlassian products (generally) require UTF-8 for everything. The message looks like this: [WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
Last, but not least, please try to build only for JIRA 6.0 not 6.0.4.
If possible, post the messages from you atlas-package command so we can try to guess what might be wrong. Please also specify your development environment, IDE/OS/Encoding of Shell, and your target platform, i.e. JIRA 6.0.4 under Windows x64or whatever.
Regards, Holger
#Paul: BTW: this has nothing todo with Running from inside Eclipse, you need a JIRA instance for those type of plugins, see here: Atlassian JIRA