Expose data to API from a postbuild Plugin

[David Tolley]

Hello,

I am trying to expose some data to the API from a post-build step, and I am
not having much luck at getting the data into the API. I have added the
@Extension and @ExtensionBean annotations, and still nothing is showing up
for me. Here is what I have, any ideas as to why I can't access the exposed
info from the API?

package com.groupon.injectartifactintoapi;

import hudson.Extension;
import hudson.Launcher;
import hudson.model.*;
import hudson.tasks.BuildStepDescriptor;
import hudson.tasks.BuildStepMonitor;
import hudson.tasks.Publisher;
import hudson.tasks.Recorder;
import org.apache.commons.lang.StringUtils;
import org.kohsuke.stapler.DataBoundConstructor;
import org.kohsuke.stapler.export.Exported;
import org.kohsuke.stapler.export.ExportedBean;

import java.io.*;

@ExportedBean
public class InjectArtifactIntoAPI extends Recorder {
    public final String artifactName;
    @Exported
    public String revision;

    @DataBoundConstructor
    public InjectArtifactIntoAPI(String artifactName) {

        this.artifactName = artifactName;

    }

    @Override
    public boolean perform(AbstractBuild<?, ?> build, Launcher launcher,
BuildListener listener) throws InterruptedException, IOException {

        if (build.getHasArtifacts()) {

                for (Run.Artifact artifact : build.getArtifacts()) {
                    if (artifact.getFileName() == artifactName) {
                        FileInputStream fstream = new
FileInputStream(artifact.getFileName());
                        DataInputStream in = new DataInputStream(fstream);
                        BufferedReader br = new BufferedReader(new
InputStreamReader(in));
                        revision = br.readLine();
                        System.out.println(revision);
                    }
                }
        }

        final PrintStream logger = listener.getLogger();
        logger.println(StringUtils.defaultString(revision));

        revision = "243dffefef";