A REST controller which can be used to expose the version of a WAR application built with Maven. Useful when used with vsConsole to monitor the versions of you applications deployed to various environments. See http://vs-console.appspot.com/

gistfile1.java

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import javax.servlet.ServletContext;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import java.io.IOException;
import java.io.InputStream;
import java.text.MessageFormat;
import java.util.Properties;

@Component
@Scope("request")
@Path("version")
public class VersionREST {

    private static final String VERSION_KEY = "version";
    private static final String POM_PROPS_PATH_MF = "/META-INF/maven/{0}/{1}/pom.properties";

    @Context
    private ServletContext context;

    @GET
    @Produces("text/plain")
    public String version() {
        return getMavenWarVersion(context, "<YOUR GROUP ID>", "<YOUR ARTIFACT ID");
    }

    public String getMavenWarVersion(ServletContext servletContext, String groupId, String artifactId) {
        String resourceName = MessageFormat.format(POM_PROPS_PATH_MF, new Object[]{groupId, artifactId});
        Properties properties = loadProperties(servletContext.getResourceAsStream(resourceName));
        if (properties != null) {
            return properties.getProperty(VERSION_KEY);
        }
        return "unknown";
    }

    private Properties loadProperties(InputStream is) {
        if (is != null) {
            Properties properties = new Properties();
            try {
                properties.load(is);
            } catch (IOException ex) {
                return null;
            }
            return properties;
        }
        return null;
    }
}