JClouds destroying gce

gistfile1.txt

        final String POLL_PERIOD_TWENTY_SECONDS = String.valueOf(SECONDS.toMillis(20));

        Properties overrides = new Properties();
        overrides.setProperty(ComputeServiceProperties.POLL_INITIAL_PERIOD, POLL_PERIOD_TWENTY_SECONDS);
        overrides.setProperty(ComputeServiceProperties.POLL_MAX_PERIOD, POLL_PERIOD_TWENTY_SECONDS);
        Iterable<Module> modules = ImmutableSet.<Module> of(new SshjSshClientModule(), new SLF4JLoggingModule());
        ComputeServiceContext context = ContextBuilder.newBuilder("google-compute-engine")
                .credentials("valid user", "valid password")
                .modules(modules)
                .overrides(overrides)
                .buildView(ComputeServiceContext.class);
        ComputeService computeService = context.getComputeService();

        // version 1
        computeService.destroyNode("nodeid"); // nodeid is nodeMetadata.getId()

        // version 2
        Set<? extends NodeMetadata> servers = computeService.destroyNodesMatching(inGroup("servername"));
        for (NodeMetadata server : servers) {
            log.info("Deleted %s%n", server);
        }