= Spring Cloud Stream & Task Maven Metadata Plugin
Maven plugin for aggregating Spring Boot metadata from all dependencies of a project into a single metadata-only artifact.
== Usage
To use this plugin, configure this plugin for your app project:
[source, xml]
----
<build>
<plugins>
<plugin>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dataflow-apps-metadata-plugin</artifactId>
<version>1.1.0-SNAPSHOT</version>
<executions>
<execution>
<id>aggregate-metadata</id>
<phase>compile</phase>
<goals>
<goal>aggregate-metadata</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
----
This will produce and attach to the build a jar file named `<artifactId>-<version>-metadata.jar` where the `metadata` suffix is the maven classifier and can be customized as follows:
[source, xml]
----
<build>
<plugins>
<plugin>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dataflow-apps-metadata-plugin</artifactId>
<version>1.1.0-SNAPSHOT</version>
<executions>
<execution>
<id>aggregate-metadata</id>
<phase>compile</phase>
<goals>
<goal>aggregate-metadata</goal>
</goals>
<configuration>
<classifier>mymetadata</classifier>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
----
The gathered metadata can be filtered and stored into a java properties file named `META-INF/spring-configuration-metadata-encoded.properties`.
The file includes a single property named `org.springframework.cloud.dataflow.spring.configuration.metadata.json` which contains the filtered metadata encoded as Base64.
To activate the feature, set the `storeFilteredMetadata` configuration option to `true`.
Use the `metadataFilter` configuration option to specify the metadata to include.
The following example includes the `server.port` property and all properties from two configuration properties classes:
[source, xml]
----
<build>
<plugins>
<plugin>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dataflow-apps-metadata-plugin</artifactId>
<version>1.1.0-SNAPSHOT</version>
<configuration>
<storeFilteredMetadata>true</storeFilteredMetadata>
<metadataFilter>
<names>
<filter>server.port</filter>
</names>
<sourceTypes>
<filter>com.example.MyConfigProperties</filter>
<filter>com.example.MyOtherConfigProperties</filter>
</sourceTypes>
</metadataFilter>
</configuration>
<executions>
<execution>
<id>aggregate-metadata</id>
<phase>compile</phase>
<goals>
<goal>aggregate-metadata</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
----
