80 lines
1.5 KiB
Markdown
80 lines
1.5 KiB
Markdown
Implement a POF:
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```
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package functions;
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import java.util.function.Function;
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public class Uppercase implements Function<String, String> {
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public String apply(String input) {
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return input.toUpperCase();
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}
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}
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```
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Install it into your local Maven repository:
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```
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./mvnw clean install
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```
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Create a `function.properties` file that provides its Maven coordinates. For example:
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```
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dependencies.function: io.spring.sample:uppercase-function:0.0.1-SNAPSHOT
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```
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Copy the openwhisk runner JAR to the working directory (same directory as the properties file):
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```
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cp spring-cloud-function-adapters/spring-cloud-function-adapter-openwhisk/target/spring-cloud-function-adapter-openwhisk-1.0.0.BUILD-SNAPSHOT.jar runner.jar
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```
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Generate a m2 repo from the `--thin.dryrun` of the runner JAR with the above properties file:
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```
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java -jar runner.jar --thin.root=m2 --thin.name=function --thin.dryrun
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```
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Use the following Dockerfile:
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```
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FROM openjdk:8
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COPY m2 /m2
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ADD runner.jar .
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ADD function.properties .
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ENTRYPOINT [ "sh", "-c", "java -Djava.security.egd=file:/dev/./urandom -jar runner.jar --thin.root=/m2 --thin.name=function --function.name=uppercase" ]
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EXPOSE 8080
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```
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Build the Docker image:
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```
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docker build -t [username/appname] .
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```
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Push the Docker image:
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```
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docker push [username/appname]
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```
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Use the OpenWhisk CLI (e.g. after `vagrant ssh`) to create the action:
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```
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wsk action create --docker example [username/appname]
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```
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Invoke the action:
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```
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wsk action invoke --result example --param payload foo
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{
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"result": "FOO"
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}
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```
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