Extending A Manifest

package org.candlepin.example;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

import org.candlepin.model.Consumer;

/**
 * A sample ExportExtensionAdapter implementation that simply creates and adds a
 * txt file to the manifest's extension directory.
 *
 */
public class SampleManifestExtensionAdapter implements ExportExtensionAdapter {

     public void extendManifest(File extensionDir, Consumer targetConsumer, Map<String, String> extensionData)
        throws IOException {
         String version = (String) extensionData.get("version");
         if (version == null) {
             throw new IOException("Missing version when adding extension data to manifest.");
         }
         File extension = new File(extensionDir, String.format("my-extension-%s.txt", version));
         PrintWriter writer = new PrintWriter(extension);
         writer.write("An extension was created for consumer " + targetConsumer.getUuid() + ".\n");
         writer.write("Version: " + version);
         writer.close();
     }

}

package org.candlepin.example;

import com.google.inject.AbstractModule;

/**
 * When overriding service implmentation, a custom guice module must be created. In this
 * example, we simply bind the ExportExtensionAdapter interface to our custom extension
 * adapter class so that candlepin will inject our adapter whenever the interface is
 * injected.
 *
 */
public class CustomCandlepinModule extends AbstractModule {

    @Override
    protected void configure() {
        bind(ExportExtensionAdapter.class).to(SampleManifestExtensionAdapter.class);
    }

}