How to use multiple annotation processors with maven-compiler-plugin

Question

I have a spring boot project that has lombok and mapstruct and uses maven as the build tool. I need the annotations to be processed at compile time with the resultant generated sources packaged with the final jar. The build is successful. However, the final jar is missing the mapstruct implementation class. The error when I try to start the spring boot application is:

APPLICATION FAILED TO START

Description:

Field salesforceObjectMapper in com.some_org.service.salesforce.object.processor.SalesforceObjectProcessor required a bean of type 'com.some_org.service.salesforce.object.mapper.SalesforceObjectMapper' that could not be found.

Action:

Consider defining a bean of type 'com.some_org.service.salesforce.object.mapper.SalesforceObjectMapper' in your configuration.

Here is my maven-compiler-plugin setup:

<plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.7.0</version>
    <configuration>
        <source>1.8</source>
        <target>1.8</target>
        <annotationProcessorPaths>
            <path>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.12</version>
            </path>
            <path>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct-processor</artifactId>
                <version>1.2.0.Final</version>
            </path>
        </annotationProcessorPaths>
        <compilerArgs>
            <compilerArg>-Amapstruct.suppressGeneratorTimestamp=true</compilerArg>
            <compilerArg>-Amapstruct.suppressGeneratorVersionInfoComment=true</compilerArg>
        </compilerArgs>
    </configuration>
</plugin>

Oladipupo Aina · Accepted Answer · 2020-04-11 02:52:49Z

Eventually resolved this by overriding the default compile goal during the compile phase using execution as shown below:

<plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.7.0</version>
    <executions>
        <execution>
            <id>Compile With Annotation Processing</id>
            <phase>compile</phase>
            <goals>
                <goal>compile</goal>
            </goals>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
                <annotationProcessorPaths>
                    <path>
                        <groupId>org.projectlombok</groupId>
                        <artifactId>lombok</artifactId>
                        <version>1.18.12</version>
                    </path>
                    <path>
                        <groupId>org.mapstruct</groupId>
                        <artifactId>mapstruct-processor</artifactId>
                        <version>1.2.0.Final</version>
                    </path>
                </annotationProcessorPaths>
                <compilerArgs>
                    <compilerArg>-Amapstruct.suppressGeneratorTimestamp=true</compilerArg>
                    <compilerArg>-Amapstruct.suppressGeneratorVersionInfoComment=true</compilerArg>
                </compilerArgs>
            </configuration>
        </execution>
    </executions>
</plugin>

Jeffrey Chen · Accepted Answer · 2023-05-17 23:26:32Z

If your lombok and mapstruct don't play well with each other, you can use lombok-mapstruct-binding to resolve the conflict (You don't need to put it in the execution tag). The key is to include the binding artifact in the same place with the lombok and mapstruct annotation processors configuration. It works splendid in my case!

<build>
  <plugins>
    <plugin>
      ..
      <configuration>
        ..
        <annotationProcessorPaths>
        <path>
          <groupId>org.projectlombok</groupId>
          <artifactId>lombok</artifactId>
          <version>1.18.20</version>
        </path>
        <path>
          <groupId>org.projectlombok</groupId>
          <artifactId>lombok-mapstruct-binding</artifactId>
          <version>0.2.0</version>
        </path>
        <path>
          <groupId>org.mapstruct</groupId>
          <artifactId>mapstruct-processor</artifactId>
          <version>1.4.2.Final</version>
        </path>
      </annotationProcessorPaths>
    </plugin>
  <plugins>
<build>

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