Maven upgraded DROOLS version and now can no longer build

Question

I am new to maven and java. I am working on a Java/DROOLS project. I was experiencing errors which seemed to be fixed with the next version of DROOLS. I changed the version in my pom.xml and then did mvn package.

The files were downloaded but every line of code that references DROOLS throws a compile error of package org.drools does not exist.

[ERROR] /C:/Dev/src/main/java/com/company/project/drools/client/DroolsRulesRunner.java:[11,18] package org.drools does not exist
[ERROR] /C:/Dev/src/main/java/com/company/project/drools/client/DroolsRulesRunner.java:[12,29] package org.drools.definition does not exist

Any help would be greatly appreciated.

Edit 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.bericotechnologies</groupId>
  <artifactId>sbt-rules</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>jar</packaging>
  <name>my-app</name>
  <url>http://maven.apache.org</url>
  <properties>
    <drools.version>7.6.0.Final</drools.version>
    <jbpm5.version>7.6.0.Final</jbpm5.version>
  </properties>
  <dependencies>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-jdk14</artifactId>
      <version>1.7.12</version>
    </dependency>
    <dependency>
      <groupId>org.jbpm</groupId>
      <artifactId>jbpm-flow</artifactId>
      <version>${jbpm5.version}</version>
    </dependency>
    <dependency>
      <groupId>org.jbpm</groupId>
      <artifactId>jbpm-bpmn2</artifactId>
      <version>${jbpm5.version}</version>
    </dependency>
    <dependency>
      <groupId>org.jbpm</groupId>
      <artifactId>jbpm-flow-builder</artifactId>
      <version>${jbpm5.version}</version>
    </dependency>
    <dependency>
      <groupId>pl.maciejwalkowiak</groupId>
      <artifactId>junit-drools</artifactId>
      <version>1.0</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.hamcrest</groupId>
      <artifactId>hamcrest-all</artifactId>
      <version>1.3</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>joda-time</groupId>
      <artifactId>joda-time</artifactId>
      <version>2.9</version>
    </dependency>
    <dependency>
      <groupId>org.drools</groupId>
      <artifactId>drools-compiler</artifactId>
      <version>${drools.version}</version>
    </dependency>
    <dependency>
      <groupId>org.eclipse.persistence</groupId>
      <artifactId>org.eclipse.persistence.core</artifactId>
      <version>2.6.3</version>
    </dependency>
    <dependency>
      <groupId>com.microsoft.sqlserver</groupId>
      <artifactId>sqljdbc4</artifactId>
      <version>4.0</version>
    </dependency>
    <dependency>
      <groupId>com.microsoft.sqlserver</groupId>
      <artifactId>sqljdbc</artifactId>
      <version>4.0</version>
    </dependency>
    <dependency>
      <groupId>org.rzo.yajsw</groupId>
      <artifactId>wrapper</artifactId>
      <version>11.11</version>
    </dependency>
    <dependency>
      <groupId>org.rzo.yajsw</groupId>
      <artifactId>wrapperApp</artifactId>
      <version>11.11</version>
    </dependency>
  </dependencies>
  <repositories>
    <repository>
      <id>jboss</id>
      <name>jboss</name>
      <url>https://repository.jboss.org/nexus/content/groups/public/</url>
    </repository>
    <repository>
      <id>maciejwalkowiak.pl</id>
      <url>https://github.com/maciejwalkowiak/maven-repo/raw/releases/</url>
    </repository>
  </repositories>
  <build>
    <resources>
      <resource>
        <directory>src/main/rules</directory>
      </resource>
    </resources>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.3</version>
        <configuration>
          <source>1.7</source>
          <target>1.7</target>
        </configuration>
      </plugin>
      <plugin>
        <groupId>com.google.code.sortpom</groupId>
        <artifactId>maven-sortpom-plugin</artifactId>
        <version>2.3.0</version>
        <executions>
          <execution>
            <phase>verify</phase>
            <goals>
              <goal>sort</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <configuration>
          <archive>
            <manifest>
              <mainClass>com.berico.psip.run.RunDroolsService</mainClass>
            </manifest>
          </archive>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

The only thing that I changed is

<properties>
    <drools.version>5.6.0.Final</drools.version>
    <jbpm5.version>5.5.0.Final</jbpm5.version>
  </properties>

to

<properties>
    <drools.version>7.6.0.Final</drools.version>
    <jbpm5.version>7.6.0.Final</jbpm5.version>
  </properties>

If I change it back everything works fine. I can see the 7.6.0.Final jars in the repository.

Answer 1

You have broken imports and you have to fix them.

There's changes in the package structure of Drools between versions 5.6.0.Final and 7.6.0.Final. The package "definitions" is now under org.drools.core.definitions (v7.6.0.Final) and not under org.drools.definitions (5.6.0.Final).

You need to remove all imports beginning with org.drools in your classes and re-import the missing Drools classes again with the new package locations - those from version 7.6.0.Final.