Include a Jar in Maven Project based on Operating System - java

I'm using a third party software in my Maven Project. The API calls are same for both Windows and Mac OS but the JAR files are different. Is there a way to identify the operating system at run-time and load appropriate jar from my lib folder in a Maven Project ? I want to be able to provide this final executable Jar to my client who may use my final Jar in an Windows or Mac OS and should be able to work on it by including my Jar in his project. For now, my client is including the Jar in his class path which seems as a horrible way of doing.

It could be nicely done by using Maven profiles and activation feature
<profiles>
<profile>
<id>windows-x86_64</id>
<activation>
<os>
<family>windows</family>
<arch>amd64</arch>
</os>
</activation>
</profile>
<profile>
<id>windows-x86</id>
<activation>
<os>
<family>windows</family>
<arch>x86</arch>
</os>
</activation>
</profile>
In this profiles you could set up custom properties, custom dependencies, etc.

Likely you need Maven NAR Plugin or may be use profiles depending on the actual content of system-specific parts

Related

Maven profile activation from windows system variable not working

I have the following maven profile configuration
<profiles>
<profile>
<id>dev</id>
<activation>
<activeByDefault>true</activeByDefault>
<property>
<name>spring.profiles.active</name>
<value>dev</value>
</property>
</activation>
</profile>
<profile>
<id>test</id>
<activation>
<property>
<name>spring.profiles.active</name>
<value>test</value>
</property>
</activation>
</profile>
</profiles>
I have this in application.properties
spring.profiles.active=dev
So dev is my default for both spring and maven profiles.
I then have Windows system variable SPRING_PROFILES_ACTIVE set with a value of test to explicitly use the test profile.
which according to the documentation this should override the dev value in my properties file
http://docs.spring.io/spring-boot/docs/current/reference/html/howto-properties-and-configuration.html
69.5 Set the active Spring profiles
The Spring Environment has an API for this, but normally you would set
a System property (spring.profiles.active) or an OS environment
variable (SPRING_PROFILES_ACTIVE). E.g. launch your application with a
-D argument (remember to put it before the main class or jar archive):
$ java -jar -Dspring.profiles.active=production
demo-0.0.1-SNAPSHOT.jar
In Spring Boot you can also set the active profile in
application.properties, e.g.
spring.profiles.active=production
A value set this way is replaced by the System property or environment
variable setting, but not by the SpringApplicationBuilder.profiles()
method. Thus the latter Java API can be used to augment the profiles
without changing the defaults.
See Chapter 25, Profiles in the ‘Spring Boot features’ section for
more information.
Now when I run my Spring application it IS using the test profile in Spring, however the maven profile activation does not pick up on this and is still using the dev profile.
I have tried setting SPRING_PROFILES_ACTIVE as the name in the <property> element to make sure it wasn't a issue with the lowercase . version and the uppercase _ version but that didn't help.
It DOES work if I supply the variable when I run maven with -Dspring.profiles.active=test.
Any help is greatly appreciated.
edit: apparently this also doesn't work when I deploy a war to tomcat where catalina.properties contains spring.profiles.active=test. The same thing, Spring uses test but Maven is still stuck on dev.
How about activating the profile by using environment variable ?
<profiles>
<profile>
<id>dev</id>
<activation>
<activeByDefault>true</activeByDefault>
<property>
<name>spring.profiles.active</name>
<value>dev</value>
</property>
</activation>
</profile>
<profile>
<id>test</id>
<activation>
<property>
<name>env.SPRING_PROFILES_ACTIVE</name>
<value>test</value>
</property>
</activation>
</profile>
</profiles>
Unfortunately, what you want to do is not possible. Profiles can only be activated from the command line or in some cases from the settings.xml. See this answer. This one includes links to JIRA issues discussing the challenges and what others have tried to make it work.
System properties are set on the command line.

Maven Profile reads data from Properties file

I have a Selenium project which uses Maven as a build tool and I want to read different environment details (protocol, domain, subdomain, etc) from a .properties file. Would it be possible to use Maven profiles in order to run my tests on different environments such as dev, staging, prod based on the profile which I am specifying when triggering the mvn command?
dev.properties:
protocol=http
domain=domain.com
subdomain=www
pom.xml:
<profiles>
<profile>
<id>prod</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
</profile>
<profile>
<id>pre_prod</id>
</profile>
<profile>
<id>dev</id>
</profile>
</profiles>
mvn:
mvn clean test -Pdev
Data should then be retrieved in the java code using
System.getProperty("protocol");
System.getProperty("domain");
System.getProperty("subdomain");
Any help would be very much appreciated.
Thanks!
If you just want to read different properties files based on a command line argument, could you not just pass in a string for example -Denv=dev
Then in your properties reader class have it init the properties file based on System.getProperty("env");
Properties generalProperties = new Properties();
String generalPropertiesFileName = "data/"+
System.getProperty("env") + ".properties";
initProperties(generalProperties, generalPropertiesFileName);
Alternatively you can also pass properties from the command line to your POM in the same way -
<properties>
<property>
<protocol></protocol>
<domain></domain>
<subdomain></subdomain>
<property>
<properties>
And then these can be passed in from the command line as -Dprotocol=foo etc
Hope that helps?

Maven build for Spring boot Application for windows and linux platforms

I need to generate my spring boot application binaries for windows and linux platforms using Maven build.
I am planning to have two different application.properties for windows and linux i.e
application-windows.properties
application-linux.properties
and in the pom.xml I will have this
<profile>
<id>dev</id>
<properties>
<activatedProperties>windows</activatedProperties>
</properties>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
</profile>
<profile>
<id>release</id>
<properties>
<activatedProperties>linux</activatedProperties>
</properties>
</profile>
Maven build will be triggered using Jenkins.But in this way I can have only one profile active at a time,So It will require two jenkins project for windows and linux.
Is there any better way of doing this?
Profile should be chosen by giving build argument while starting the spring boot application.
-Dspring.profles.active=$profile
If you are using jenkins to start the application , just add an option to choose profile during job execution which can add parameter to application.
https://docs.spring.io/spring-boot/docs/1.1.6.RELEASE/reference/html/boot-features-profiles.html

IntelliJ: activate Maven profile when running Junit tests

I have declared some properties that are specific to Maven profiles. A part of my pom.xml:
<profiles>
<profile>
<id>release</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<properties>
<my.properties.file>foo.xml</my.properties.file>
</properties>
</profile>
<profile>
<id>ci</id>
<properties>
<my.properties.file>bar.xml</my.properties.file>
</properties>
</profile>
</profiles>
I encounter some problem to use the "ci" Maven profile when I start Junit tests via IntelliJ IDEA 2016.
I activate my profile via the "Maven Projects" panel, then I start tests. The problem is the "my.properties.file" property value is equal to "foo.xml", not "bar.xml".
I have no problem with command-line (I can use the "-Pci" flag). How can I tell IntelliJ to use the "ci" profile? Thx.
You should add the profiles to the Maven setting.xml file (you should find it in the path ${YOUR_MAVEN_HOME}\apache-maven-3.1.1\conf\setting.xml).
Then, you have to open intellij, click on View > Tool Windows > Maven Projects. There, you should see your profiles (ci and release) and select the correct one.
Hope this can help you.
Just finally solved it.
<profile>
<id>profile-to-be-activated-on-build</id>
<activation>
<activeByDefault>false</activeByDefault><!-- on your flavor -->
<property>
<name>mvn-profile-env-var-trigger</name>
</property>
</activation>
</profile>
Goto JUnit default profile (aka configuration template). Add into JVM args:
-Dmvn-profile-env-var-trigger
You may need to manually reload maven profiles in IDE.
Also make sure on [Settings > Build Tools > Maven > Running tests] envVars is checked (or better everything).

Customised maven deployable (war with some dependencies removed)

I have a multi module web app building with maven. We build the war as per normal and deploy and run on developer machines and local test servers using tomcat.
Then we want to deploy the application to the cloud. To do this we create a special version of tomcat which has all the libraries preloaded and a special version of the war which only has our code. Point here is tomcat is preloaded on the cloud server, the war is uploaded each time it is changed. Currently we are having to manually remove the dependencies from the built war.
What is the best way for maven to do this? Should I build a custom packaging type or maybe run some post build plugin to remove these wars? Or something else? I think the best way to activate this custom build is via a profile. I did try and remove these dependencies by setting them to scope = provided in the new profile but the transitive dependencies still made it into the war.
If you want to exclude all dependencies, you can use the war plugin's packagingExcludes to do so:
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
<configuration>
<packagingExcludes>WEB-INF/lib/*.jar</packagingExcludes>
...
</configuration>
</plugin>
Specify this plugin inside a profile to only perform it for production.
You can achieve using profile in maven. As you said it is not working, I can think of you configure something wrong. Try something like:
<profiles>
<profile>
<id>dev</id>
<activation>
<!-- active by default, turn off when on prod -->
<activeByDefault>true</activeByDefault>
</activation>
<dependencies>
<!-- include this in dev, not in prod -->
<dependency>
<groupId>com.company</groupId>
<artifactId>xyz</artifactId>
</dependency>
</dependencies>
</profile>
</profiles>
Then in command line, mvn package -P !dev to deactivate dev profile so that not include the jars.
Make sure com.company:xzy is not included in <project><dependencies></dependencies></project>.

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