// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you under the Apache License, Version 2.0 (the

// "License"); you may not use this file except in compliance

// with the License.  You may obtain a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

    private static final Logger s_logger = Logger.getLogger(VmwareServerDiscoverer.class);

    @Inject

    VmwareManager _vmwareMgr;

    @Inject

    AlertManager _alertMgr;

    @Inject

    VMTemplateDao _tmpltDao;

    @Inject

    ClusterDetailsDao _clusterDetailsDao;

    @Inject

    CiscoNexusVSMDeviceDao _nexusDao;

    @Inject

    NetworkModel _netmgr;

    @Inject

    HypervisorCapabilitiesDao _hvCapabilitiesDao;

    @Inject

    VmwareDatacenterZoneMapDao _vmwareDcZoneMapDao;

    @Inject

    VmwareDatacenterDao _vmwareDcDao;

    protected Map<String, String> _urlParams;

    protected boolean useDVS = false;

    protected boolean nexusDVS = false;

    CiscoNexusVSMElement _nexusElement;

    List<NetworkElement> networkElements;

    public VmwareServerDiscoverer() {

        s_logger.info("VmwareServerDiscoverer is constructed");

    }

    @Override

    public Map<? extends ServerResource, Map<String, String>>

    find(long dcId, Long podId, Long clusterId, URI url, String username, String password, List<String> hostTags) throws DiscoveryException {

        if (s_logger.isInfoEnabled())

            s_logger.info("Discover host. dc: " + dcId + ", pod: " + podId + ", cluster: " + clusterId + ", uri host: " + url.getHost());

        if (podId == null) {

            if (s_logger.isInfoEnabled())

                s_logger.info("No pod is assigned, assuming that it is not for vmware and skip it to next discoverer");

            return null;

        }

        boolean failureInClusterDiscovery = true;

        String vsmIp = "";

        ClusterVO cluster = _clusterDao.findById(clusterId);

        if (cluster == null || cluster.getHypervisorType() != HypervisorType.VMware) {

            if (s_logger.isInfoEnabled())

                s_logger.info("invalid cluster id or cluster is not for VMware hypervisors");

            return null;

        }

        Map<String, String> clusterDetails = _clusterDetailsDao.findDetails(clusterId);

        boolean legacyZone = _vmwareMgr.isLegacyZone(dcId);

        boolean usernameNotProvided = (username == null || username.isEmpty());

        boolean passwordNotProvided = (password == null || password.isEmpty());

        //Check if NOT a legacy zone.

        if (!legacyZone) {

            // Retrieve VMware DC associated with specified zone

            VmwareDatacenterVO vmwareDc = fetchVmwareDatacenterByZone(dcId);

            // Ensure username & password provided.

            // If either or both not provided, try to retrieve & use the credentials from database, which are provided earlier while adding VMware DC to zone.

            if (usernameNotProvided || passwordNotProvided) {

                // Retrieve credentials associated with VMware DC

                s_logger.info("Username and/or Password not provided while adding cluster to cloudstack zone. "

                        + "Hence using both username & password provided while adding VMware DC to CloudStack zone.");

                username = vmwareDc.getUser();

                password = vmwareDc.getPassword();

                clusterDetails.put("username", username);

                clusterDetails.put("password", password);

                _clusterDetailsDao.persist(clusterId, clusterDetails);

            }

            String updatedInventoryPath = validateCluster(url, vmwareDc);

            if (!url.getPath().equals(updatedInventoryPath)) {

                // If url from API doesn't specify DC then update url in database with DC associated with this zone.

                clusterDetails.put("url", url.getScheme() + "://" + url.getHost() + updatedInventoryPath);

                _clusterDetailsDao.persist(clusterId, clusterDetails);

            }

        } else {

            // For legacy zones insist on the old model of asking for credentials for each cluster being added.

            if (usernameNotProvided) {

                if (passwordNotProvided) {

                    throw new InvalidParameterValueException("Please provide username & password to add this cluster to zone");

                } else {

                    throw new InvalidParameterValueException("Please provide username to add this cluster to zone");

                }

            } else if (passwordNotProvided) {

                throw new InvalidParameterValueException("Please provide password to add this cluster to zone");

            }

        }

        List<HostVO> hosts = _resourceMgr.listAllHostsInCluster(clusterId);

        if (hosts != null && hosts.size() > 0) {

            int maxHostsPerCluster = _hvCapabilitiesDao.getMaxHostsPerCluster(hosts.get(0).getHypervisorType(), hosts.get(0).getHypervisorVersion());

            if (hosts.size() >= maxHostsPerCluster) {

                String msg = "VMware cluster " + cluster.getName() + " is too big to add new host, current size: " + hosts.size() + ", max. size: " + maxHostsPerCluster;

                s_logger.error(msg);

                throw new DiscoveredWithErrorException(msg);

            }

        }

        String privateTrafficLabel = null;

        String publicTrafficLabel = null;

        String guestTrafficLabel = null;

        Map<String, String> vsmCredentials = null;

        VirtualSwitchType defaultVirtualSwitchType = VirtualSwitchType.StandardVirtualSwitch;

        String paramGuestVswitchType = null;

        String paramGuestVswitchName = null;

        String paramPublicVswitchType = null;

        String paramPublicVswitchName = null;

        VmwareTrafficLabel guestTrafficLabelObj = new VmwareTrafficLabel(TrafficType.Guest);

        VmwareTrafficLabel publicTrafficLabelObj = new VmwareTrafficLabel(TrafficType.Public);

        DataCenterVO zone = _dcDao.findById(dcId);

        NetworkType zoneType = zone.getNetworkType();

        _readGlobalConfigParameters();

        // Set default physical network end points for public and guest traffic

        // Private traffic will be only on standard vSwitch for now.

        if (useDVS) {

            // Parse url parameters for type of vswitch and name of vswitch specified at cluster level

            paramGuestVswitchType = _urlParams.get(ApiConstants.VSWITCH_TYPE_GUEST_TRAFFIC);

            paramGuestVswitchName = _urlParams.get(ApiConstants.VSWITCH_NAME_GUEST_TRAFFIC);

            paramPublicVswitchType = _urlParams.get(ApiConstants.VSWITCH_TYPE_PUBLIC_TRAFFIC);

            paramPublicVswitchName = _urlParams.get(ApiConstants.VSWITCH_NAME_PUBLIC_TRAFFIC);

            defaultVirtualSwitchType = getDefaultVirtualSwitchType();

        }

        // Zone level vSwitch Type depends on zone level traffic labels

        //

        // User can override Zone wide vswitch type (for public and guest) by providing following optional parameters in addClusterCmd

        // param "guestvswitchtype" with valid values vmwaredvs, vmwaresvs, nexusdvs

        // param "publicvswitchtype" with valid values vmwaredvs, vmwaresvs, nexusdvs

        //

        // Format of label is <VSWITCH>,<VLANID>,<VSWITCHTYPE>

        // If a field <VLANID> OR <VSWITCHTYPE> is not present leave it empty.

        // Ex: 1) vswitch0

        // 2) dvswitch0,200,vmwaredvs

        // 3) nexusepp0,300,nexusdvs

        // 4) vswitch1,400,vmwaresvs

        // 5) vswitch0

        // default vswitchtype is 'vmwaresvs'.

        // <VSWITCHTYPE> 'vmwaresvs' is for vmware standard vswitch

        // <VSWITCHTYPE> 'vmwaredvs' is for vmware distributed virtual switch

        // <VSWITCHTYPE> 'nexusdvs' is for cisco nexus distributed virtual switch

        // Get zone wide traffic labels for Guest traffic and Public traffic

        guestTrafficLabel = _netmgr.getDefaultGuestTrafficLabel(dcId, HypervisorType.VMware);

        // Process traffic label information provided at zone level and cluster level

        guestTrafficLabelObj = getTrafficInfo(TrafficType.Guest, guestTrafficLabel, defaultVirtualSwitchType, paramGuestVswitchType, paramGuestVswitchName, clusterId);

        if (zoneType == NetworkType.Advanced) {

            // Get zone wide traffic label for Public traffic

            publicTrafficLabel = _netmgr.getDefaultPublicTrafficLabel(dcId, HypervisorType.VMware);

            // Process traffic label information provided at zone level and cluster level

            publicTrafficLabelObj =

                    getTrafficInfo(TrafficType.Public, publicTrafficLabel, defaultVirtualSwitchType, paramPublicVswitchType, paramPublicVswitchName, clusterId);

            // Configuration Check: A physical network cannot be shared by different types of virtual switches.

            //

            // Check if different vswitch types are chosen for same physical network

            // 1. Get physical network for guest traffic - multiple networks

            // 2. Get physical network for public traffic - single network

            // See if 2 is in 1

            //  if no - pass

            //  if yes - compare publicTrafficLabelObj.getVirtualSwitchType() == guestTrafficLabelObj.getVirtualSwitchType()

            //      true  - pass

            //      false - throw exception - fail cluster add operation

            List<? extends PhysicalNetwork> pNetworkListGuestTraffic = _netmgr.getPhysicalNtwksSupportingTrafficType(dcId, TrafficType.Guest);

            List<? extends PhysicalNetwork> pNetworkListPublicTraffic = _netmgr.getPhysicalNtwksSupportingTrafficType(dcId, TrafficType.Public);

            // Public network would be on single physical network hence getting first object of the list would suffice.

            PhysicalNetwork pNetworkPublic = pNetworkListPublicTraffic.get(0);

            if (pNetworkListGuestTraffic.contains(pNetworkPublic)) {

                if (publicTrafficLabelObj.getVirtualSwitchType() != guestTrafficLabelObj.getVirtualSwitchType()) {

                    String msg =

                            "Both public traffic and guest traffic is over same physical network " + pNetworkPublic +

                            ". And virtual switch type chosen for each traffic is different" +

                            ". A physical network cannot be shared by different types of virtual switches.";

                    s_logger.error(msg);

                    throw new InvalidParameterValueException(msg);

                }

            }

        } else {

            // Distributed virtual switch is not supported in Basic zone for now.

            // Private / Management network traffic is not yet supported over distributed virtual switch.

            if (guestTrafficLabelObj.getVirtualSwitchType() != VirtualSwitchType.StandardVirtualSwitch) {

                String msg = "Detected that Guest traffic is over Distributed virtual switch in Basic zone. Only Standard vSwitch is supported in Basic zone.";

                s_logger.error(msg);

                throw new DiscoveredWithErrorException(msg);

            }

        }

        privateTrafficLabel = _netmgr.getDefaultManagementTrafficLabel(dcId, HypervisorType.VMware);

        if (privateTrafficLabel != null) {

            s_logger.info("Detected private network label : " + privateTrafficLabel);

        }

        Pair<Boolean, Long> vsmInfo = new Pair<Boolean, Long>(false, 0L);

        if (nexusDVS && (guestTrafficLabelObj.getVirtualSwitchType() == VirtualSwitchType.NexusDistributedVirtualSwitch) ||

                ((zoneType == NetworkType.Advanced) && (publicTrafficLabelObj.getVirtualSwitchType() == VirtualSwitchType.NexusDistributedVirtualSwitch))) {

            // Expect Cisco Nexus VSM details only if following 2 condition met

            // 1) The global config parameter vmware.use.nexus.vswitch

            // 2) Atleast 1 traffic type uses Nexus distributed virtual switch as backend.

            if (zoneType != NetworkType.Basic) {

                publicTrafficLabel = _netmgr.getDefaultPublicTrafficLabel(dcId, HypervisorType.VMware);

                if (publicTrafficLabel != null) {

                    s_logger.info("Detected public network label : " + publicTrafficLabel);

                }

            }

            // Get physical network label

            guestTrafficLabel = _netmgr.getDefaultGuestTrafficLabel(dcId, HypervisorType.VMware);

            if (guestTrafficLabel != null) {

                s_logger.info("Detected guest network label : " + guestTrafficLabel);

            }

            vsmIp = _urlParams.get("vsmipaddress");

            String vsmUser = _urlParams.get("vsmusername");

            String vsmPassword = _urlParams.get("vsmpassword");

            String clusterName = cluster.getName();

            try {

                vsmInfo = _nexusElement.validateAndAddVsm(vsmIp, vsmUser, vsmPassword, clusterId, clusterName);

            } catch (ResourceInUseException ex) {

                DiscoveryException discEx = new DiscoveryException(ex.getLocalizedMessage() + ". The resource is " + ex.getResourceName());

                throw discEx;

            }

            vsmCredentials = _vmwareMgr.getNexusVSMCredentialsByClusterId(clusterId);

        }

        VmwareContext context = null;

        try {

            context = VmwareContextFactory.create(url.getHost(), username, password);

            if (privateTrafficLabel != null)

                context.registerStockObject("privateTrafficLabel", privateTrafficLabel);

            if (nexusDVS) {

                if (vsmCredentials != null) {

                    s_logger.info("Stocking credentials of Nexus VSM");

                    context.registerStockObject("vsmcredentials", vsmCredentials);

                }

            }

            List<ManagedObjectReference> morHosts = _vmwareMgr.addHostToPodCluster(context, dcId, podId, clusterId, URLDecoder.decode(url.getPath(), "UTF-8"));

            if (morHosts == null)

                s_logger.info("Found 0 hosts.");

            if (privateTrafficLabel != null)

                context.uregisterStockObject("privateTrafficLabel");

            if (morHosts == null) {

                s_logger.error("Unable to find host or cluster based on url: " + URLDecoder.decode(url.getPath(), "UTF-8"));

                return null;

            }

            ManagedObjectReference morCluster = null;

            clusterDetails = _clusterDetailsDao.findDetails(clusterId);

            if (clusterDetails.get("url") != null) {

                URI uriFromCluster = new URI(UriUtils.encodeURIComponent(clusterDetails.get("url")));

                morCluster = context.getHostMorByPath(URLDecoder.decode(uriFromCluster.getPath(), "UTF-8"));

                if (morCluster == null || !morCluster.getType().equalsIgnoreCase("ClusterComputeResource")) {

                    s_logger.warn("Cluster url does not point to a valid vSphere cluster, url: " + clusterDetails.get("url"));

                    return null;

                } else {

                    ClusterMO clusterMo = new ClusterMO(context, morCluster);

                    ClusterDasConfigInfo dasConfig = clusterMo.getDasConfig();

                    if (dasConfig != null && dasConfig.isEnabled() != null && dasConfig.isEnabled().booleanValue()) {

                        clusterDetails.put("NativeHA", "true");

                        _clusterDetailsDao.persist(clusterId, clusterDetails);

                    }

                }

            }

            if (!validateDiscoveredHosts(context, morCluster, morHosts)) {

                if (morCluster == null)

                    s_logger.warn("The discovered host is not standalone host, can not be added to a standalone cluster");

                else

                    s_logger.warn("The discovered host does not belong to the cluster");

                return null;

            }

            Map<VmwareResource, Map<String, String>> resources = new HashMap<VmwareResource, Map<String, String>>();

            for (ManagedObjectReference morHost : morHosts) {

                Map<String, String> details = new HashMap<String, String>();

                Map<String, Object> params = new HashMap<String, Object>();

                HostMO hostMo = new HostMO(context, morHost);

                details.put("url", hostMo.getHostName());

                details.put("username", username);

                details.put("password", password);

                String guid = morHost.getType() + ":" + morHost.getValue() + "@" + url.getHost();

                details.put("guid", guid);

                params.put("url", hostMo.getHostName());

                params.put("username", username);

                params.put("password", password);

                params.put("zone", Long.toString(dcId));

                params.put("pod", Long.toString(podId));

                params.put("cluster", Long.toString(clusterId));

                params.put("guid", guid);

                if (privateTrafficLabel != null) {

                    params.put("private.network.vswitch.name", privateTrafficLabel);

                }

                params.put("guestTrafficInfo", guestTrafficLabelObj);

                params.put("publicTrafficInfo", publicTrafficLabelObj);

                params.put("router.aggregation.command.each.timeout", _configDao.getValue(Config.RouterAggregationCommandEachTimeout.toString()));

                VmwareResource resource = new VmwareResource();

                try {

                    resource.configure("VMware", params);

                } catch (ConfigurationException e) {

                    _alertMgr.sendAlert(AlertManager.AlertType.ALERT_TYPE_HOST, dcId, podId, "Unable to add " + url.getHost(), "Error is " + e.getMessage());

                    s_logger.warn("Unable to instantiate " + url.getHost(), e);

                }

                resource.start();

                resources.put(resource, details);

            }

            // place a place holder guid derived from cluster ID

            cluster.setGuid(UUID.nameUUIDFromBytes(String.valueOf(clusterId).getBytes()).toString());

            _clusterDao.update(clusterId, cluster);

            // Flag cluster discovery success

            failureInClusterDiscovery = false;

            return resources;

        } catch (DiscoveredWithErrorException e) {

            throw e;

        } catch (Exception e) {

            s_logger.warn("Unable to connect to Vmware vSphere server. service address: " + url.getHost());

            return null;

        } finally {

            if (context != null)

                context.close();

            if (failureInClusterDiscovery && vsmInfo.first()) {

                try {

                    s_logger.debug("Deleting Nexus 1000v VSM " + vsmIp + " because cluster discovery and addition to zone has failed.");

                    _nexusElement.deleteCiscoNexusVSM(vsmInfo.second().longValue());

                } catch (Exception e) {

                }

            }

        }

    }

    protected CiscoNexusVSMElement getCiscoNexusVSMElement() {

        for (NetworkElement networkElement : networkElements) {

            if (networkElement instanceof CiscoNexusVSMElement)

                return (CiscoNexusVSMElement)networkElement;

        }

        throw new IllegalStateException("Failed to CiscoNexusVSMElement");

    }

    private VmwareDatacenterVO fetchVmwareDatacenterByZone(Long dcId) throws DiscoveryException {

        VmwareDatacenterVO vmwareDc;

        VmwareDatacenterZoneMapVO vmwareDcZone;

        long vmwareDcId;

        String msg;

        // Check if zone is associated with DC

        vmwareDcZone = _vmwareDcZoneMapDao.findByZoneId(dcId);

        if (vmwareDcZone == null) {

            msg = "Zone " + dcId + " is not associated with any VMware DC yet. " + "Please add VMware DC to this zone first and then try to add clusters.";

            s_logger.error(msg);

            throw new DiscoveryException(msg);

        }

        // Retrieve DC added to this zone from database

        vmwareDcId = vmwareDcZone.getVmwareDcId();

        vmwareDc = _vmwareDcDao.findById(vmwareDcId);

        return vmwareDc;

    }

    private String validateCluster(URI url, VmwareDatacenterVO vmwareDc) throws DiscoveryException {

        String msg;

        String vmwareDcNameFromDb;

        String vmwareDcNameFromApi;

        String vCenterHost;

        String updatedInventoryPath = url.getPath();

        String clusterName = null;

        vmwareDcNameFromApi = vmwareDcNameFromDb = vmwareDc.getVmwareDatacenterName();

        vCenterHost = vmwareDc.getVcenterHost();

        String inventoryPath = url.getPath();

        assert (inventoryPath != null);

        String[] pathTokens = inventoryPath.split("/");

        if (pathTokens.length == 2) {

            // DC name is not present in url.

            // Using DC name read from database.

            clusterName = pathTokens[1];

            updatedInventoryPath = "/" + vmwareDcNameFromDb + "/" + clusterName;

        } else if (pathTokens.length == 3) {

            vmwareDcNameFromApi = pathTokens[1];

            clusterName = pathTokens[2];

        }

        if (!vCenterHost.equalsIgnoreCase(url.getHost())) {

            msg =

                    "This cluster " + clusterName + " belongs to vCenter " + url.getHost() + ". But this zone is associated with VMware DC from vCenter " + vCenterHost +

                    ". Make sure the cluster being added belongs to vCenter " + vCenterHost + " and VMware DC " + vmwareDcNameFromDb;

            s_logger.error(msg);

            throw new DiscoveryException(msg);

        } else if (!vmwareDcNameFromDb.equalsIgnoreCase(vmwareDcNameFromApi)) {

            msg =

                    "This cluster " + clusterName + " belongs to VMware DC " + vmwareDcNameFromApi + " .But this zone is associated with VMware DC " + vmwareDcNameFromDb +

                    ". Make sure the cluster being added belongs to VMware DC " + vmwareDcNameFromDb + " in vCenter " + vCenterHost;

            s_logger.error(msg);

            throw new DiscoveryException(msg);

        }

        return updatedInventoryPath;

    }

    private boolean validateDiscoveredHosts(VmwareContext context, ManagedObjectReference morCluster, List<ManagedObjectReference> morHosts) throws Exception {

        if (morCluster == null) {

            for (ManagedObjectReference morHost : morHosts) {

                ManagedObjectReference morParent = (ManagedObjectReference)context.getVimClient().getDynamicProperty(morHost, "parent");

                if (morParent.getType().equalsIgnoreCase("ClusterComputeResource"))

                    return false;

            }

        } else {

            for (ManagedObjectReference morHost : morHosts) {

                ManagedObjectReference morParent = (ManagedObjectReference)context.getVimClient().getDynamicProperty(morHost, "parent");

                if (!morParent.getType().equalsIgnoreCase("ClusterComputeResource"))

                    return false;

                if (!morParent.getValue().equals(morCluster.getValue()))

                    return false;

            }

        }

        return true;

    }

    @Override

    public void postDiscovery(List<HostVO> hosts, long msId) {

        // do nothing

    }

    @Override

    public boolean matchHypervisor(String hypervisor) {

        if (hypervisor == null)

            return true;

        return Hypervisor.HypervisorType.VMware.toString().equalsIgnoreCase(hypervisor);

    }

    @Override

    public Hypervisor.HypervisorType getHypervisorType() {

        return Hypervisor.HypervisorType.VMware;

    }

    @Override

    public boolean configure(String name, Map<String, Object> params) throws ConfigurationException {

        if (s_logger.isInfoEnabled())

            s_logger.info("Configure VmwareServerDiscoverer, discover name: " + name);

        super.configure(name, params);

        createVmwareToolsIso();

        if (s_logger.isInfoEnabled()) {

            s_logger.info("VmwareServerDiscoverer has been successfully configured");

        }

        _resourceMgr.registerResourceStateAdapter(this.getClass().getSimpleName(), this);

        return true;

    }

    private void createVmwareToolsIso() {

        String isoName = "vmware-tools.iso";

        VMTemplateVO tmplt = _tmpltDao.findByTemplateName(isoName);

        Long id;

        if (tmplt == null) {

            id = _tmpltDao.getNextInSequence(Long.class, "id");

            VMTemplateVO template =

                    VMTemplateVO.createPreHostIso(id, isoName, isoName, ImageFormat.ISO, true, true, TemplateType.PERHOST, null, null, true, 64, Account.ACCOUNT_ID_SYSTEM,

                            null, "VMware Tools Installer ISO", false, 1, false, HypervisorType.VMware);

            _tmpltDao.persist(template);

        } else {

            id = tmplt.getId();

            tmplt.setTemplateType(TemplateType.PERHOST);

            tmplt.setUrl(null);

            _tmpltDao.update(id, tmplt);

        }

    }

    @Override

    public HostVO createHostVOForConnectedAgent(HostVO host, StartupCommand[] cmd) {

        // TODO Auto-generated method stub

        return null;

    }

    @Override

    public HostVO createHostVOForDirectConnectAgent(HostVO host, StartupCommand[] startup, ServerResource resource, Map<String, String> details, List<String> hostTags) {

        StartupCommand firstCmd = startup[0];

        if (!(firstCmd instanceof StartupRoutingCommand)) {

            return null;

        }

        StartupRoutingCommand ssCmd = ((StartupRoutingCommand)firstCmd);

        if (ssCmd.getHypervisorType() != HypervisorType.VMware) {

            return null;

        }

        return _resourceMgr.fillRoutingHostVO(host, ssCmd, HypervisorType.VMware, details, hostTags);

    }

    @Override

    public DeleteHostAnswer deleteHost(HostVO host, boolean isForced, boolean isForceDeleteStorage) throws UnableDeleteHostException {

        if (host.getType() != com.cloud.host.Host.Type.Routing || host.getHypervisorType() != HypervisorType.VMware) {

            return null;

        }

        _resourceMgr.deleteRoutingHost(host, isForced, isForceDeleteStorage);

        return new DeleteHostAnswer(true);

    }

    @Override

    public boolean start() {

        if (!super.start())

            return false;

        _nexusElement = getCiscoNexusVSMElement();

        return true;

    }

    @Override

    public boolean stop() {

        _resourceMgr.unregisterResourceStateAdapter(this.getClass().getSimpleName());

        return super.stop();

    }

    private VmwareTrafficLabel getTrafficInfo(TrafficType trafficType, String zoneWideTrafficLabel, VirtualSwitchType defaultVirtualSwitchType, String vSwitchType,

            String vSwitchName, Long clusterId) {

        VmwareTrafficLabel trafficLabelObj = null;

        Map<String, String> clusterDetails = null;

        try {

            trafficLabelObj = new VmwareTrafficLabel(zoneWideTrafficLabel, trafficType, defaultVirtualSwitchType);

        } catch (InvalidParameterValueException e) {

            s_logger.error("Failed to recognize virtual switch type specified for " + trafficType + " traffic due to " + e.getMessage());

            throw e;

        }

        clusterDetails = _clusterDetailsDao.findDetails(clusterId);

        if (vSwitchName != null) {

            trafficLabelObj.setVirtualSwitchName(vSwitchName);

        }

        if (trafficType == TrafficType.Guest) {

            clusterDetails.put(ApiConstants.VSWITCH_NAME_GUEST_TRAFFIC, trafficLabelObj.getVirtualSwitchName());

        } else {

            clusterDetails.put(ApiConstants.VSWITCH_NAME_PUBLIC_TRAFFIC, trafficLabelObj.getVirtualSwitchName());

        }

        if (vSwitchType != null) {

            validateVswitchType(vSwitchType);

            trafficLabelObj.setVirtualSwitchType(VirtualSwitchType.getType(vSwitchType));

        }

        if (trafficType == TrafficType.Guest) {

            clusterDetails.put(ApiConstants.VSWITCH_TYPE_GUEST_TRAFFIC, trafficLabelObj.getVirtualSwitchType().toString());

        } else {

            clusterDetails.put(ApiConstants.VSWITCH_TYPE_PUBLIC_TRAFFIC, trafficLabelObj.getVirtualSwitchType().toString());

        }

        // Save cluster level override configuration to cluster details

        _clusterDetailsDao.persist(clusterId, clusterDetails);

        return trafficLabelObj;

    }

    private VmwareTrafficLabel getTrafficInfo(TrafficType trafficType, String zoneWideTrafficLabel, Map<String, String> clusterDetails,

            VirtualSwitchType defVirtualSwitchType) {

        VmwareTrafficLabel trafficLabelObj = null;

        try {

            trafficLabelObj = new VmwareTrafficLabel(zoneWideTrafficLabel, trafficType, defVirtualSwitchType);

        } catch (InvalidParameterValueException e) {

            s_logger.error("Failed to recognize virtual switch type specified for " + trafficType + " traffic due to " + e.getMessage());

            throw e;

        }

        if (defVirtualSwitchType.equals(VirtualSwitchType.StandardVirtualSwitch)) {

            return trafficLabelObj;

        }

        if (trafficType == TrafficType.Guest) {

            if (clusterDetails.containsKey(ApiConstants.VSWITCH_NAME_GUEST_TRAFFIC)) {

                trafficLabelObj.setVirtualSwitchName(clusterDetails.get(ApiConstants.VSWITCH_NAME_GUEST_TRAFFIC));

            }

            if (clusterDetails.containsKey(ApiConstants.VSWITCH_TYPE_GUEST_TRAFFIC)) {

                trafficLabelObj.setVirtualSwitchType(VirtualSwitchType.getType(clusterDetails.get(ApiConstants.VSWITCH_TYPE_GUEST_TRAFFIC)));

            }

        } else if (trafficType == TrafficType.Public) {

            if (clusterDetails.containsKey(ApiConstants.VSWITCH_NAME_PUBLIC_TRAFFIC)) {

                trafficLabelObj.setVirtualSwitchName(clusterDetails.get(ApiConstants.VSWITCH_NAME_PUBLIC_TRAFFIC));

            }

            if (clusterDetails.containsKey(ApiConstants.VSWITCH_TYPE_PUBLIC_TRAFFIC)) {

                trafficLabelObj.setVirtualSwitchType(VirtualSwitchType.getType(clusterDetails.get(ApiConstants.VSWITCH_TYPE_PUBLIC_TRAFFIC)));

            }

        }

        return trafficLabelObj;

    }

    private void _readGlobalConfigParameters() {

        String value;

        if (_configDao != null) {

            value = _configDao.getValue(Config.VmwareUseDVSwitch.key());

            useDVS = Boolean.parseBoolean(value);

            value = _configDao.getValue(Config.VmwareUseNexusVSwitch.key());

            nexusDVS = Boolean.parseBoolean(value);

        }

    }

    @Override

    protected HashMap<String, Object> buildConfigParams(HostVO host) {

        HashMap<String, Object> params = super.buildConfigParams(host);

        Map<String, String> clusterDetails = _clusterDetailsDao.findDetails(host.getClusterId());

        // Get zone wide traffic labels from guest traffic and public traffic

        String guestTrafficLabel = _netmgr.getDefaultGuestTrafficLabel(host.getDataCenterId(), HypervisorType.VMware);

        String publicTrafficLabel = _netmgr.getDefaultPublicTrafficLabel(host.getDataCenterId(), HypervisorType.VMware);

        _readGlobalConfigParameters();

        VirtualSwitchType defaultVirtualSwitchType = getDefaultVirtualSwitchType();

        params.put("guestTrafficInfo", getTrafficInfo(TrafficType.Guest, guestTrafficLabel, clusterDetails, defaultVirtualSwitchType));

        params.put("publicTrafficInfo", getTrafficInfo(TrafficType.Public, publicTrafficLabel, clusterDetails, defaultVirtualSwitchType));

        return params;

    }

    private VirtualSwitchType getDefaultVirtualSwitchType() {

        if (nexusDVS)

            return VirtualSwitchType.NexusDistributedVirtualSwitch;

        else if (useDVS)

            return VirtualSwitchType.VMwareDistributedVirtualSwitch;

        else

            return VirtualSwitchType.StandardVirtualSwitch;

    }

    @Override

    public ServerResource reloadResource(HostVO host) {

        String resourceName = host.getResource();

        ServerResource resource = getResource(resourceName);

        if (resource != null) {

            _hostDao.loadDetails(host);

            HashMap<String, Object> params = buildConfigParams(host);

            try {

                resource.configure(host.getName(), params);

            } catch (ConfigurationException e) {

                s_logger.warn("Unable to configure resource due to " + e.getMessage());

                return null;

            }

            if (!resource.start()) {

                s_logger.warn("Unable to start the resource");

                return null;

            }

        }

        return resource;

    }

    private void validateVswitchType(String inputVswitchType) {

        VirtualSwitchType vSwitchType = VirtualSwitchType.getType(inputVswitchType);

        if (vSwitchType == VirtualSwitchType.None) {

            s_logger.error("Unable to resolve " + inputVswitchType + " to a valid virtual switch type in VMware environment.");

            throw new InvalidParameterValueException("Invalid virtual switch type : " + inputVswitchType);

        }

    }

    @Override

    public void putParam(Map<String, String> params) {

        if (_urlParams == null) {

            _urlParams = new HashMap<String, String>();

        }

        _urlParams.putAll(params);

    }

    public List<NetworkElement> getNetworkElements() {

        return networkElements;

    }

    @Inject

    public void setNetworkElements(List<NetworkElement> networkElements) {

        this.networkElements = networkElements;

    }

}