This maven plugin is a port of the netflix codegen plugin for Gradle. Found here.

Feel free to simply create a GitHub issue for requests to integrate with newer releases of the core DGS Codegen library.

PRS are welcome as well. The level of difficulty across DGS Codgen updates varies. Typically we add new plugin options and update the CodeGenConfig constructor - when new options are added to the Codegen core library.

Please make sure you run step 2 below to ensure your PR builds correctly. You may need to analyze the CodeGenConfig ctor parameters and add support for new options. Make sure to document any new options to the Options section below.

Process:

1. bump the version in pom.xml
2. run mvn install locally to ensure the project still builds
3. Adjust CodeGen to support new options if needed.

The DGS Code Generation plugin generates code for basic types and example data fetchers based on your Domain Graph Service's graphql schema file during the project's build process. The plugin requires the designated packageName for file generation. If no schemaPath is specified, it will look in the src/main/resources/schema folder for any files with .graphqls extension.

https://github.com/deweyjose/graphqlcodegen-example

Options are configured in the <configuration> element of the dgs-codegen-maven-plugin plugin.

This options enables the plugin to limit code generation to only schema files that have changed. Today this only works with schemaPaths.

This only works for <schemaPaths>. A subsequent release for schema compilation via dependencies will be release soon.

• Type: boolean
• Required: false
• Default: true

<onlyGenerateChanged>true</onlyGenerateChanged>

• Type: string
• Required: false
• Default: docs

Example

<subPackageNameDocs>docs</subPackageNameDocs>

• Type: string
• Required: false
• Default: docs

Example

<generateDocs>true</generateDocs>

• Type: string
• Required: false
• Default: ./generated-docs

Example

<generatedDocsFolder>true</generatedDocsFolder>

• Type: boolean
• Required: false
• Default: false

Example

<addGeneratedAnnotation>true</addGeneratedAnnotation>

• Type: boolean
• Required: false
• Default: false

Example

<dgs.codegen.skip>true</dgs.codegen.skip>

Or

# mvn ... -Ddgs.codegen.skip=true

• Type: array
• Required: false
• Default: ${project.build.resources}/schema

Example

<schemaPaths>
    <param>src/main/resources/schema/schema.graphqls1</param>
    <param>src/main/resources/schema/schema.graphqls2</param>
</schemaPaths>

• Type: array
• Required: false
• Default: []
• Official doc : https://netflix.github.io/dgs/generating-code-from-schema/#generating-code-from-external-schemas-in-jars.
• Please note that .graphql(s) files must exist under the META-INF folder in the external jar file.

Example

<schemaJarFilesFromDependencies>
    <param>com.netflix.graphql.dgs:some-dependency:1.0.0</param>
    <param>com.netflix.graphql.dgs:some-dependency:X.X.X</param>
</schemaJarFilesFromDependencies>

• Type: string
• Required: true

Example

<packageName>com.acme.se.generated</packageName>

• Type: map
• Required: false

Example

<typeMapping>
    <Date>java.time.LocalDateTime</Date>
</typeMapping>

Provide typeMapping as properties file(s) that is accessible as a compile-time-classpath resource Key-Value pairs in the properties file will be added to typeMapping Map when it is not already present in it

When a same GraphQL type is present in both typeMapping and also in typeMappingPropertiesFiles, value in typeMapping will be used (and the value from typeMappingPropertiesFiles will be ignored)

• Type: Array
• Required: false

Example

<typeMappingPropertiesFiles>
    <typeMappingPropertiesFile>commontypes-typeMapping.properties</typeMappingPropertiesFile>
    <typeMappingPropertiesFile>someother-commontypes-typeMapping.properties</typeMappingPropertiesFile>
</typeMappingPropertiesFiles>

• Type: string
• Required: false
• Default: client

Example

<subPackageNameClient>client</subPackageNameClient>

• Type: string
• Required: false
• Default: client

Example

<subPackageNameDatafetchers>datafetchers</subPackageNameDatafetchers>

• Type: string
• Required: false
• Default: client

Example

<subPackageNameTypes>types</subPackageNameTypes>

• Type: boolean
• Required: false
• Default: false

Example

<generateBoxedTypes>false</generateBoxedTypes>

• Type: boolean
• Required: false
• Default: false

Example

<generateClientApi>false</generateClientApi>

• Type: boolean
• Required: false
• Default: false

Example

<generateClientApiV2>false</generateClientApiV2>

• Type: boolean
• Required: false
• Default: false

Example

<generateInterfaces>false</generateInterfaces>

• Type: boolean
• Required: false
• Default: false

Example

<generateKotlinNullableClasses>false</generateKotlinNullableClasses>

• Type: boolean
• Required: false
• Default: false

Example

<generateKotlinClosureProjections>false</generateKotlinClosureProjections>

• Type: string
• Required: false
• Default: ${project.basedir}/target/generated-sources

Example:

<outputDir>${project.build.directory}/generated-sources</outputDir>

• Type: string
• Required: false
• Default: ${project.basedir}/target/generated-examples

Example:

<outputDir>${project.build.directory}/generated-examples</outputDir>

• Description: Limit generation to specified set of queries. Used in conjunction with generateClient.
• Type: array
• Required: false
• Default: []

Example

<includeQueries>
    <param>QueryFieldName1</param>
    <param>QueryFieldName2</param>
</includeQueries>

• Description: Limit generation to specified set of mutations. Used in conjunction with generateClient.
• Type: array
• Required: false
• Default: []

Example

<includeMutations>
    <param>MutationFieldName1</param>
    <param>MutationFieldName1</param>
</includeMutations>

• Type: boolean
• Required: false
• Default: false

Example

<skipEntityQueries>false</skipEntityQueries>

• Type: boolean
• Required: false
• Default: false

Example

<shortProjectionNames>false</shortProjectionNames>

• Type: boolean
• Required: false
• Default: false

Example

<generateDataTypes>false</generateDataTypes>

• Type: int
• Required: false
• Default: 10

Example

<maxProjectionDepth>10</maxProjectionDepth>

• Type: String
• Required: false
• Default: java

Example

<language>kotlin</language>

• Type: boolean
• Required: false
• Default: false

Example

<omitNullInputFields>false</omitNullInputFields>

• Type: boolean
• Required: false
• Default: false

Example

<kotlinAllFieldsOptional>false</kotlinAllFieldsOptional>

• Type: boolean
• Required: false
• Default: false

Example

<snakeCaseConstantNames>false</snakeCaseConstantNames>

• Type: boolean
• Required: false
• Default: true

Example

<writeToFiles>false</writeToFiles>

• Type: array
• Required: false
• Default: []

Example

<includeSubscriptions>
    <param>Subscriptions1</param>
    <param>Subscriptions2</param>
</includeSubscriptions>

• Type: boolean
• Required: false
• Default: true

Example

<generateInterfaceSetters>false</generateInterfaceSetters>

• Type: boolean
• Required: false
• Default: false

Example

<generateInterfaceMethodsForInterfaceFields>false</generateInterfaceMethodsForInterfaceFields>

• Type: boolean
• Required: false
• Default: false

Example

<javaGenerateAllConstructor>false</javaGenerateAllConstructor>

• Type: boolean
• Required: false
• Default: false

Example

<implementSerializable>false</implementSerializable>

• Type: boolean
• Required: false
• Default: false

<generateCustomAnnotations>false</generateCustomAnnotations>

• Type: boolean
• Required: false
• Default: false

<addDeprecatedAnnotation>false</addDeprecatedAnnotation>

• Type: map<string, string>
• Required: false

<includeImports>
    <validator>com.test.validator</validator>
</includeImports>

• Type: map<string,<string,string>>
• Required: false

<includeEnumImports>
    <foo>
        <properties>
            <bar>bla</bar>
        </properties>
    </foo>
    <bar>
        <properties>
            <zoo>bar.bar</zoo>
            <zing>bla.bla</zing>
        </properties>
    </bar>
</includeEnumImports>

Maps the custom annotation and class names to the class packages. Only used when generateCustomAnnotations is enabled.

• Type
• Required: false

<includeClassImports>
    <foo>
        <properties>
            <bar>bla</bar>
        </properties>
    </foo>
    <bar>
        <properties>
            <zoo>bar.bar</zoo>

            <zing>bla.bla</zing>
        </properties>
    </bar>
</includeClassImports>

• Type: boolean
• Required: false
• Default: false

Example

<generateIsGetterForPrimitiveBooleanFields>false</generateIsGetterForPrimitiveBooleanFields>

Add the following to your pom files build/plugins section.

<plugin>
    <groupId>io.github.deweyjose</groupId>
    <artifactId>graphqlcodegen-maven-plugin</artifactId>
    <version>1.24</version>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <schemaPaths>
            <param>src/main/resources/schema/schema.graphqls</param>
        </schemaPaths>
        <packageName>com.acme.[your_project].generated</packageName>
        <addGeneratedAnnotation>true</addGeneratedAnnotation>
    </configuration>
</plugin>

You'll also need to add the generates-sources folder to the classpath:

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>build-helper-maven-plugin</artifactId>
    <executions>
        <execution>
            <phase>generate-sources</phase>
            <goals>
                <goal>add-source</goal>
            </goals>
            <configuration>
                <sources>
                    <source>${project.build.directory}/generated-sources</source>
                </sources>
            </configuration>
        </execution>
    </executions>
</plugin>

COPIED FROM NETFLIX DOCUMENTATION.

The generated types are available as part of the packageName.types package under build/generated. These are automatically added to your project's sources. The generated example data fetchers are available under build/generated-examples. Note that these are NOT added to your project's sources and serve mainly as a basic boilerplate code requiring further customization.