toulezu/swagger-maven-plugin

JAX-RS & SpringMVC supported maven build plugin, helps you generate Swagger JSON and API document in build phase.

Swagger Maven Plugin

This plugin enables your Swagger-annotated project to generate Swagger specs and customizable, templated static documents during the maven build phase. Unlike swagger-core, swagger-maven-plugin does not actively serve the spec with the rest of the application; it generates the spec as a build artifact to be used in downstream Swagger tooling.

Features

• Supports Swagger Spec 2.0
• Supports SpringMvc & JAX-RS
• Quickly generates swagger.json and static document by mvn compile
• Use Handlebars as template to customize the static document.

Versions

• 3.1.0 supports Swagger Spec [2.0](https://github .com/swagger-api/swagger-spec/blob/master/versions/2.0.md), support JAX-RS & SpingMVC. (ACTIVE!)
• 3.0.1 supports Swagger Spec [2.0](https://github .com/swagger-api/swagger-spec/blob/master/versions/2.0.md), support JAX-RS & SpingMVC. (ACTIVE!)
• 2.3.4 supports Swagger Spec 1.2, support JAX-RS & SpringMVC. (Lazily maintained)
• 1.1.1 supports Swagger Spec 1.1. (No longer maintained)

Upgrading from 3.0.1 to 3.1.0+

Version 3.1.0+ of this plugin depends on the repackaged/rebranded io.swagger.swagger-core dependency, which is formerly known as com.wordnik.swagger-core. If you use 3.1.0+, you must use the swagger-core dependency in the io.swagger namespace instead of the com.wordnik namespace, which is deprecated. You may see an example of migrating a project from 3.0.1 to 3.1.0 in the swagger-maven-plugin example project.

Usage

Import the plugin in your project by adding following configuration in your plugins block:

<build>
	<plugins>
		<plugin>
			<groupId>com.github.kongchen</groupId>
			<artifactId>swagger-maven-plugin</artifactId>
			<version>${swagger-maven-plugin-version}</version>
			<configuration>
				<apiSources>
					<apiSource>
						...
					</apiSource>
				</apiSources>
			</configuration>
		</plugin>
	</plugins>
</build>

One apiSource can be considered as a version of APIs of your service.

You can specify several apiSources. Generally, one is enough.

Configuration for apiSource

name	description
springmvc	Tell the plugin your project is a JAX-RS(false) or a SpringMvc(true) project
locations required	Classes containing Swagger's annotation @Api, or packages containing those classes can be configured here, using ; as the delimiter.
schemes	The transfer protocol of the API. Values MUST be from the list: "http", "https", "ws", "wss", using , as the delimiter.
host	The host (name or ip) serving the API. This MUST be the host only and does not include the scheme nor sub-paths. It MAY include a port. The host does not support path templating.
basePath	The base path on which the API is served, which is relative to the host. The value MUST start with a leading slash (/). The basePath does not support path templating.
descriptionFile	A Path to file with description to be set to Swagger Spec 2.0's info Object
info required	The basic information of the api, using same definition as Swagger Spec 2.0's info Object
securityDefinitions	You can put your security definitions here, see more details below
templatePath	The path of a handlebars template file, see more details below.
outputPath	The path of the generated static document, not existed parent directories will be created. If you don't want to generate a static document, just don't set it.
outputFormats	The format types of the generated swagger spec. Valid values are json, yaml or both json,yaml. The json format is default.
swaggerDirectory	The directory of generated swagger.json file. If null, no swagger.json will be generated.
swaggerApiReader	If not null, the value should be a full name of the class implementing com.github.kongchen.swagger.docgen.reader.ClassSwaggerReader. This allows you to flexibly implement/override the reader's implementation. Default is com.github.kongchen.swagger.docgen.reader.JaxrsReader
attachSwaggerArtifact	If enabled, the generated swagger.json file will be attached as a maven artifact. The swaggerDirectory's name will be used as an artifact classifier. Default is false.
modelSubstitute	The model substitute file's path, see more details below
typesToSkip	Nodes of class names to explicitly skip during parameter processing. More details below
apiModelPropertyAccessExclusions	Allows the exclusion of specified @ApiModelProperty fields. This can be used to hide certain model properties from the swagger spec. More details below
jsonExampleValues	If true, all example values in @ApiModelProperty will be handled as json raw values. This is useful for creating valid examples in the generated json for all property types, including non-string ones.
skipSwaggerGeneration	If true, swagger generation will be skipped. Default is false.
modelConverters	List of custom implementations of io.swagger.converter.ModelConverter that should be used when generating the swagger files.

Template File

If you'd like to generate a template-driven static document, such as markdown or HTML documentation, you'll need to specify a handlebars template file in templatePath. The value for templatePath supports 2 kinds of path:

1. Resource in classpath. You should specify a resource path with a classpath: prefix. e.g:

   1. classpath:/markdown.hbs
   2. classpath:/templates/hello.html

2. Local file's absolute path. e.g:

   1. ${basedir}/src/main/resources/markdown.hbs
   2. ${basedir}/src/main/resources/template/hello.html

There's a standalone project for the template files, fetch them and customize it for your own project.

Security Definitions

There're 3 types of security definitions according to Swagger Spec: basic, apiKey and oauth2.

You can define multi definitions here, but you should fully follow the spec.

You can define a basic definition like this:

<securityDefinition>
    <name>MybasicAuth</name>
    <type>basic</type>
</securityDefinition>

or define several definitions in a json file and specify the json path like this:

<securityDefinition>
    <json>/securityDefinition.json</json>
</securityDefinition>

The file will be read by getClass().getResourceAsStream, so please note the path you configured.

The securityDefinition.json file should also follow the spec, one sample file like this:

{
  "api_key": {
    "type": "apiKey",
    "name": "api_key",
    "in": "header"
  },
  "petstore_auth": {
    "type": "oauth2",
    "authorizationUrl": "http://swagger.io/api/oauth/dialog",
    "flow": "implicit",
    "scopes": {
      "write:pets": "modify pets in your account",
      "read:pets": "read your pets"
    }
  }
}

Model Substitution

Throughout the course of working with Swagger, you may find that you need to substitute non-primitive objects for primitive objects. This is called model substituion, and it is supported by swagger-maven-plugin. In order to configure model substitution, you'll need to create a model substitute file. This file is a simple text file containing n lines, where each line tells swagger-maven-plugin to substitutes a model class with the supplied substitute. These two classes should be seperated by a colone (:).

Sample model substitution

com.foo.bar.PetName : java.lang.String

The above model substitution configuration would tell the plugin to substitute com.foo.bar.PetName with java.lang.String. As a result, the generated swagger.json would look like this ...

 "definitions" : {
    "Pet" : {
      "properties" : {
        ...
        "petName" : {
          "type" : "string"
        }
        ...
      }
    }

... instead of like this:

 "definitions" : {
    "Pet" : {
      "properties" : {
        ...
        "petName" : {
          "$ref" : "#/definitions/PetName"
        }
        ...
      }
    }

The model substitution file will be read by getClass().getResourceAsStream, so please note the path you configured.

Skipping Types During Processing with typesToSkip

You can instruct swagger-maven-plugin to skip processing the parameters of certain types by adding the following to your pom.xml:

<typesToSkip>
  <typeToSkip>com.foobar.skipper.SkipThisClassPlease</typeToSkip>
  <typeToSkip>com.foobar.skipper.AlsoSkipThisClassPlease</typeToSkip>
</typesToSkip>

This requires at least swagger-maven-plugin version 3.1.1-SNAPSHOT.

Excluding certain @ApiModelProperty items

If you'd like to exclude certain @ApiModelPropertys based on their access values, you may do so by adding the following as a child node of apiSource in your pom.xml:

<apiModelPropertyAccessExclusions>
    <apiModelPropertyAccessExclusion>secret-property</apiModelPropertyAccessExclusion>
</apiModelPropertyAccessExclusions>

The above setting would prevent internalThing from appearing in the swagger spec output, given this annotated model:

...
    @ApiModelProperty(name = "internalThing", access = "secret-property")
    public String getInternalThing() {
        return internalThing;
    }
...

Note: In order to use apiModelPropertyAccessExclusions, you must specify both the name and access fields of the property you wish to exclude. Additionally, apiModelPropertyAccessExclusions requires at least swagger-maven-plugin version 3.1.1-SNAPSHOT.

Install/Deploy swagger.json

You can instruct swagger-maven-plugin to deploy the generated swagger.json by adding the following to your pom.xml:

<swaggerDirectory>${project.build.directory}/swagger-ui</swaggerDirectry>
<attachSwaggerArtifact>true</attachSwaggerArtifact>

The above setting attaches the generated file to Maven for install/deploy purpose with swagger-uias classifier and json as type

Example

There's a sample here, just fork it and have a try.

A Sample Configuration

<project>
...
<build>
<plugins>
<plugin>
    <groupId>com.github.kongchen</groupId>
    <artifactId>swagger-maven-plugin</artifactId>
    <version>3.0.0</version>
    <configuration>
        <apiSources>
            <apiSource>
	            <springmvc>true</springmvc>
                <locations>com.wordnik.swagger.sample</locations>
                <schemes>http,https</schemes>
                <host>www.example.com:8080</host>
                <basePath>/api</basePath>
                <info>
                    <title>Swagger Maven Plugin Sample</title>
                    <version>v1</version>
                    <!-- use markdown here because I'm using markdown for output,
                    if you need to use html or other markup language, you need to use your target language,
                     and note escape your description for xml -->
                    <description>
                        This is a sample.
                    </description>
                    <termsOfService>
                        http://www.github.com/kongchen/swagger-maven-plugin
                    </termsOfService>
                    <contact>
                        <email>kongchen@gmail.com</email>
                        <name>Kong Chen</name>
                        <url>http://kongch.com</url>
                    </contact>
                    <license>
                        <url>http://www.apache.org/licenses/LICENSE-2.0.html</url>
                        <name>Apache 2.0</name>
                    </license>
                </info>
                <securityDefinitions>
                    <securityDefinition>
                        <name>basicAuth</name>
                        <type>basic</type>
                    </securityDefinition>
                    <securityDefinition>
                        <json>/securityDefinition.json</json>
                    </securityDefinition>
                </securityDefinitions>
                <!-- Support classpath or file absolute path here.
                1) classpath e.g: "classpath:/markdown.hbs", "classpath:/templates/hello.html"
                2) file e.g: "${basedir}/src/main/resources/markdown.hbs",
                    "${basedir}/src/main/resources/template/hello.html" -->
                <templatePath>${basedir}/src/test/resources/strapdown.html.hbs</templatePath>
                <outputPath>${basedir}/generated/document.html</outputPath>
                <swaggerDirectory>${basedir}/generated/swagger-ui</swaggerDirectory>
                <swaggerApiReader>com.wordnik.swagger.jaxrs.reader.DefaultJaxrsApiReader</swaggerApiReader>
                <attachSwaggerArtifact>true</attachSwaggerArtifact>
                <modelConverters>io.swagger.validator.BeanValidator</modelConverters>
            </apiSource>
        </apiSources>
    </configuration>
    <executions>
        <execution>
            <phase>compile</phase>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
    <dependencies>
        <!-- Adding dependency to swagger-hibernate-validations to enable the BeanValidator as a custom
             model converter -->
        <dependency>
            <groupId>io.swagger</groupId>
            <artifactId>swagger-hibernate-validations</artifactId>
            <version>1.5.6</version>
        </dependency>
    </dependencies>
</plugin>
...
</plugins>
</build>
</project>

FAQ

1. SNAPSHOT Version

SNAPSHOT versions are available for verifing issues and new features. If you would like to try to verify the fixed issues or the new added features, you may need to add a pluginRepository node in your pom.xml:

<pluginRepositories>
  <pluginRepository>
    <id>sonatype-snapshot</id>
    <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
    <releases>
      <enabled>false</enabled>
    </releases>
    <snapshots>
      <enabled>true</enabled>
    </snapshots>
  </pluginRepository>
</pluginRepositories>

2. Dependency conflicts

If you have package depedency conflict issues, such as jackson, joda-time, or jsr311-api. Run

mvn dependency:tree

to check which package introduces the one conflicts with yours, and then you can use <exclusion> configuration in pom.xml to exclude it.

Here's an example:

To exclude javax.ws.rs:jsr311-api:jar:1.1.1:compile from swagger-jaxrs_2.10:

<dependency>
    <groupId>com.wordnik</groupId>
    <artifactId>swagger-jaxrs_2.10</artifactId>
    <version>1.3.2</version>
    <exclusions>
        <exclusion>
            <groupId>javax.ws.rs</groupId>
            <artifactId>jsr311-api</artifactId>
        </exclusion>
    </exclusions>
</dependency>