# Header Enricher Function This module provides a header enricher function that can be reused and composed in other applications. ## Beans for injection The `HeaderEnricherFunctionConfiguration` auto-configuration provides the following bean: `headerEnricherFunction` You can use `headerEnricherFunction` as a qualifier when injecting. Once injected, you can use the `apply` method of the `Function` to invoke it and get the result. ## Configuration Options For more information on the various options available, please see link:src/main/java/org/springframework/cloud/fn/header/enricher/HeaderEnricherFunctionProperties.java[HeaderEnricherFunctionProperties.java] ## Tests See this link:src/test/java/org/springframework/cloud/fn/header/enricher/HeaderEnricherFunctionApplicationTests.java[test suite] for examples of how this function is used. ## Other usage See this link:../../../applications/processor/header-enricher-processor/README.adoc[README] where this function is used to create a Spring Cloud Stream application.