import com.google.common.collect.ImmutableSet;
import com.google.common.io.Closeables;
import com.google.inject.Module;
import org.jclouds.ContextBuilder;
import org.jclouds.logging.slf4j.config.SLF4JLoggingModule;
import org.jclouds.openstack.nova.v2_0.NovaApi;
import org.jclouds.openstack.nova.v2_0.domain.Server;
import org.jclouds.openstack.nova.v2_0.features.ServerApi;

import java.io.Closeable;
import java.io.IOException;
import java.util.Set;
import org.jclouds.Constants;
import org.jclouds.openstack.keystone.v2_0.config.CredentialTypes;
import org.jclouds.openstack.keystone.v2_0.config.KeystoneProperties;
import java.util.Properties;

public class JCloudsNova implements Closeable {
    private final NovaApi novaApi;
    private final Set<String> regions;

    public static void main(String[] args) throws IOException {
        JCloudsNova jcloudsNova = new JCloudsNova();

        try {
            jcloudsNova.listServers();
            jcloudsNova.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            jcloudsNova.close();
        }
    }

    public JCloudsNova() {
    Iterable<Module> modules = ImmutableSet.<Module>of(new SLF4JLoggingModule());

    Properties overrides = new Properties();
    overrides.setProperty(KeystoneProperties.CREDENTIAL_TYPE, CredentialTypes.PASSWORD_CREDENTIALS);
    overrides.setProperty(Constants.PROPERTY_API_VERSION, "2");

    String provider = "openstack-nova";
    String identity =  "demo:demo";
    String credential = "password";

    novaApi = ContextBuilder.newBuilder(provider)
            .endpoint("http://8.43.86.2:5000/v2.0/")
            .credentials(identity, credential)
            .modules(modules)
            .overrides(overrides)
            .buildApi(NovaApi.class);
    regions = novaApi.getConfiguredRegions();
}

    private void listServers() {
        for (String region : regions) {
            ServerApi serverApi = novaApi.getServerApi(region);

            System.out.println("Servers in " + region);

            for (Server server : serverApi.listInDetail().concat()) {
                System.out.println("  " + server);
            }
        }
    }

    public void close() throws IOException {
        Closeables.close(novaApi, true);
    }
}