sapjco3.jar has issues with Maven's naming convention (Springboot) - maven

Question

I am trying to compile an integration server using the springboot java framework. I am using Maven to compile a jar file, but I keep running into an issue with the way Maven stores jars in repositories.
The Jar I am working with is sapjco3.jar, which will crash on run (not package) because it neeeeds its name to be sapjco3.jar. Because the Maven repo naming convention is:
/%groupId%/%artifactId%/%version%/%artifactId%-%version%.jar
The library ends up being called sapjco3-3.0.jar.
Is there some way to pop my sapjco3.jar into my application without using a repository (I haven't been able to add it to the java.library.path or by editing the entries and xml in the ~/.m2 directory). Otherwise, is there a way to script renaming it once it is inserted??
My platform is ubuntu 14.04 LTS, by the way.
My POM file (missing the xml header, because StackOverflow doesn't parse it right):
<modelVersion>4.0.0</modelVersion>
<name>SampleIntegrationServer</name>
<description>Sample Integration Server</description>
<groupId>com.Sample</groupId>
<artifactId>SampleIntegrationServer</artifactId>
<packaging>jar</packaging>
<version>0.0.2</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.2.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
<spring-cloud-aws-version>1.0.4.RELEASE</spring-cloud-aws-version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-batch</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-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-integration</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-ws</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-velocity</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-aws</artifactId>
<version>${spring-cloud-aws-version}</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-aws-messaging</artifactId>
<version>${spring-cloud-aws-version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>net.sf.jt400</groupId>
<artifactId>jt400</artifactId>
<version>6.7</version>
</dependency>
<dependency>
<groupId>com.sap</groupId>
<artifactId>sapjco3</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>sqljdbc4</artifactId>
<version>4.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>1.3.3.RELEASE</version>
</plugin>
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<id>copy-resources</id>
<phase>validate</phase>
<goals>
<goal>copy-resources</goal>
</goals>
<configuration>
<outputDirectory>${basedir}/target/classes</outputDirectory>
<includeEmptyDirs>true</includeEmptyDirs>
<resources>
<resource>
<directory>${basedir}/src/main/resources</directory>
<filtering>false</filtering>
</resource>
</resources>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
</plugin>
</plugins>
</build>
The crash:
Factory method 'createSapConnection' threw exception; nested exception is java.lang.ExceptionInInitializerError: JCo initialization failed with java.lang.ExceptionInInitializerError: Illegal JCo archive "sapjco3-3.0.jar". It is not allowed to rename or repackage the original archive "sapjco3.jar".
I just want this to build!!
Thanks

Answer 1

I solved this problem with custom layout
import org.springframework.boot.loader.tools.Layouts.Jar;
public class ResistantToSapjco3JarLayout extends Jar implements CustomLoaderLayout {
#Override
public void writeLoadedClasses(LoaderClassesWriter writer) throws IOException {
// do Spring Boot defaults
writer.writeLoaderClasses();
URL jcoClassUrl = getClass().getClassLoader().getResource("com/sap/conn/jco/JCo.class");
if (jcoClassUrl == null) {
throw new IllegalStateException("No sapjco3 JAR on plugin classpath. "
+ "Make sure sapjco3 is added to spring-boot-maven-plugin dependency section");
}
if (!jcoClassUrl.toString().startsWith("jar:file")) {
throw new IllegalStateException("sapjco3 is not JAR");
}
JarURLConnection jarUrlConnection = (JarURLConnection) jcoClassUrl.openConnection();
JarFile sapjco3Jar = jarUrlConnection.getJarFile();
JarWriter jarWriter = (JarWriter) writer;
jarWriter.writeNestedLibrary("BOOT-INF/lib/",
new Library("sapjco3.jar", new File(sapjco3Jar.getName()), LibraryScope.COMPILE, false));
}
}
pom.xml
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<layoutFactory implementation="com.company.ResistantToSapjco3JarLayoutFactory" />
<excludeArtifactIds>sapjco3</excludeArtifactIds>
</configuration>
<dependencies>
<dependency>
<groupId>com.company</groupId>
<artifactId>resistant-to-sapjco3</artifactId>
<version>0.0.1</version>
</dependency>
<dependency>
<groupId>sapjco3</groupId>
<artifactId>sapjco3</artifactId>
<version>3.0.13</version>
</dependency>
</dependencies>
</plugin>
ResistantToSapjco3JarLayoutFactory
public class ResistantToSapjco3JarLayoutFactory implements LayoutFactory {
#Override
public Layout getLayout(File source) {
return new ResistantToSapjco3JarLayout();
}
}

Answer 2

I solved the issue using shade plugin for maven. Having maven dependency for sapjco3 with scope provided:
<dependency>
<groupId>com.sap.conn.jco</groupId>
<artifactId>sapjco3</artifactId>
<version>${sapjco3.version}</version>
<scope>provided</scope>
</dependency>
Then the work is done by copying the library when shading and excluding it when the spring maven plugin adds it's version, so that we have the original one:
<build>
<finalName>price</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>process-resources</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<stripVersion>true</stripVersion>
<includeArtifactIds>sapjco3</includeArtifactIds>
<includeTypes>jar</includeTypes>
<outputDirectory>${project.build.directory}/lib</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.1</version>
<executions>
<execution>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<keepDependenciesWithProvidedScope>false</keepDependenciesWithProvidedScope>
<createDependencyReducedPom>true</createDependencyReducedPom>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.IncludeResourceTransformer">
<resource>BOOT-INF/lib/sapjco3.jar</resource>
<file>sapjco3.jar</file>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.1.7.RELEASE</version>
<configuration>
<excludeGroupIds>com.sap.conn.jco</excludeGroupIds>
</configuration>
</plugin>
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