2 * Copyright © 2017 Ericsson India Global Services Pvt Ltd. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netvirt.elan.evpn.utils;
10 import static org.opendaylight.genius.infra.Datastore.CONFIGURATION;
12 import com.google.common.base.Optional;
13 import com.google.common.util.concurrent.Futures;
14 import com.google.common.util.concurrent.MoreExecutors;
15 import com.google.common.util.concurrent.SettableFuture;
16 import java.math.BigInteger;
17 import java.util.ArrayList;
18 import java.util.Collections;
19 import java.util.List;
20 import java.util.concurrent.ExecutionException;
21 import java.util.concurrent.Future;
22 import java.util.function.BiConsumer;
23 import java.util.function.BiPredicate;
24 import java.util.function.Function;
25 import java.util.function.Predicate;
26 import javax.annotation.Nullable;
27 import javax.inject.Inject;
28 import javax.inject.Singleton;
29 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
30 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
31 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
32 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
33 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
34 import org.opendaylight.genius.infra.ManagedNewTransactionRunner;
35 import org.opendaylight.genius.infra.ManagedNewTransactionRunnerImpl;
36 import org.opendaylight.genius.interfacemanager.globals.InterfaceInfo;
37 import org.opendaylight.genius.interfacemanager.interfaces.IInterfaceManager;
38 import org.opendaylight.genius.itm.globals.ITMConstants;
39 import org.opendaylight.genius.mdsalutil.FlowEntity;
40 import org.opendaylight.genius.mdsalutil.InstructionInfo;
41 import org.opendaylight.genius.mdsalutil.MDSALUtil;
42 import org.opendaylight.genius.mdsalutil.MatchInfo;
43 import org.opendaylight.genius.mdsalutil.NWUtil;
44 import org.opendaylight.genius.mdsalutil.NwConstants;
45 import org.opendaylight.genius.mdsalutil.instructions.InstructionGotoTable;
46 import org.opendaylight.genius.mdsalutil.instructions.InstructionWriteMetadata;
47 import org.opendaylight.genius.mdsalutil.matches.MatchTunnelId;
48 import org.opendaylight.genius.utils.ServiceIndex;
49 import org.opendaylight.infrautils.jobcoordinator.JobCoordinator;
50 import org.opendaylight.infrautils.utils.concurrent.ListenableFutures;
51 import org.opendaylight.netvirt.bgpmanager.api.IBgpManager;
52 import org.opendaylight.netvirt.elan.cache.ElanInstanceCache;
53 import org.opendaylight.netvirt.elan.l2gw.utils.SettableFutureCallback;
54 import org.opendaylight.netvirt.elan.utils.ElanConstants;
55 import org.opendaylight.netvirt.elan.utils.ElanUtils;
56 import org.opendaylight.netvirt.elanmanager.api.ElanHelper;
57 import org.opendaylight.netvirt.vpnmanager.api.IVpnManager;
58 import org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.vpn.instances.VpnInstance;
59 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
60 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
61 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServices;
62 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.ExternalTunnelList;
63 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.external.tunnel.list.ExternalTunnel;
64 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.DcGatewayIpList;
65 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.dc.gateway.ip.list.DcGatewayIp;
66 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rpcs.rev160406.GetDpnEndpointIpsInputBuilder;
67 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rpcs.rev160406.GetDpnEndpointIpsOutput;
68 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rpcs.rev160406.ItmRpcService;
69 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.EvpnAugmentation;
70 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstance;
71 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.forwarding.entries.MacEntry;
72 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.VrfEntryBase;
73 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.neutron.vpn.portip.port.data.VpnPortipToPort;
74 import org.opendaylight.yangtools.yang.binding.DataObject;
75 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
76 import org.opendaylight.yangtools.yang.common.RpcResult;
77 import org.slf4j.Logger;
78 import org.slf4j.LoggerFactory;
81 public class EvpnUtils {
83 private static final Logger LOG = LoggerFactory.getLogger(EvpnUtils.class);
85 private final BiPredicate<String, String> isNetAttach = (var1, var2) -> (var1 == null && var2 != null);
86 private final BiPredicate<String, String> isNetDetach = (var1, var2) -> (var1 != null && var2 == null);
87 private final Predicate<MacEntry> isIpv4PrefixAvailable = (macEntry) -> (macEntry != null
88 && macEntry.getIpPrefix() != null && macEntry.getIpPrefix().getIpv4Address() != null);
89 private final DataBroker broker;
90 private final ManagedNewTransactionRunner txRunner;
91 private final IInterfaceManager interfaceManager;
92 private final ElanUtils elanUtils;
93 private final ItmRpcService itmRpcService;
94 private final JobCoordinator jobCoordinator;
95 private final IBgpManager bgpManager;
96 private final IVpnManager vpnManager;
97 private final ElanInstanceCache elanInstanceCache;
100 public EvpnUtils(DataBroker broker, IInterfaceManager interfaceManager, ElanUtils elanUtils,
101 ItmRpcService itmRpcService, IVpnManager vpnManager, IBgpManager bgpManager,
102 JobCoordinator jobCoordinator, ElanInstanceCache elanInstanceCache) {
103 this.broker = broker;
104 this.txRunner = new ManagedNewTransactionRunnerImpl(broker);
105 this.interfaceManager = interfaceManager;
106 this.elanUtils = elanUtils;
107 this.itmRpcService = itmRpcService;
108 this.vpnManager = vpnManager;
109 this.bgpManager = bgpManager;
110 this.jobCoordinator = jobCoordinator;
111 this.elanInstanceCache = elanInstanceCache;
114 public boolean isWithdrawEvpnRT2Routes(ElanInstance original, ElanInstance update) {
115 return isNetDetach.test(getEvpnNameFromElan(original), getEvpnNameFromElan(update));
118 public boolean isAdvertiseEvpnRT2Routes(ElanInstance original, ElanInstance update) {
119 return isNetAttach.test(getEvpnNameFromElan(original), getEvpnNameFromElan(update));
122 @SuppressWarnings("checkstyle:IllegalCatch")
123 public void advertiseEvpnRT2Routes(EvpnAugmentation evpnAugmentation, String elanName) {
124 if (evpnAugmentation == null || evpnAugmentation.getEvpnName() == null) {
127 String evpnName = evpnAugmentation.getEvpnName();
128 List<MacEntry> macEntries = elanUtils.getElanMacEntries(elanName);
129 if (macEntries == null || macEntries.isEmpty()) {
130 LOG.trace("advertiseEvpnRT2Routes no elan mac entries found for {}", elanName);
133 String rd = vpnManager.getVpnRd(broker, evpnName);
134 ElanInstance elanInfo = elanInstanceCache.get(elanName).orNull();
135 macEntries.stream().filter(isIpv4PrefixAvailable).forEach(macEntry -> {
136 InterfaceInfo interfaceInfo = interfaceManager.getInterfaceInfo(macEntry.getInterface());
137 if (interfaceInfo == null) {
138 LOG.debug("advertiseEvpnRT2Routes, interfaceInfo is null for interface {}", macEntry.getInterface());
141 advertisePrefix(elanInfo, rd, macEntry.getMacAddress().getValue(),
142 macEntry.getIpPrefix().getIpv4Address().getValue(),
143 interfaceInfo.getInterfaceName(), interfaceInfo.getDpId());
148 public String getEndpointIpAddressForDPN(BigInteger dpnId) {
150 Future<RpcResult<GetDpnEndpointIpsOutput>> result = itmRpcService.getDpnEndpointIps(
151 new GetDpnEndpointIpsInputBuilder()
152 .setSourceDpid(dpnId)
154 RpcResult<GetDpnEndpointIpsOutput> rpcResult = null;
156 rpcResult = result.get();
157 } catch (InterruptedException e) {
158 LOG.error("getnextHopIpFromRpcOutput : InterruptedException for dpnid {}", dpnId, e);
160 } catch (ExecutionException e) {
161 LOG.error("getnextHopIpFromRpcOutput : ExecutionException for dpnid {}", dpnId, e);
164 if (!rpcResult.isSuccessful()) {
165 LOG.warn("RPC Call to getDpnEndpointIps returned with Errors {}", rpcResult.getErrors());
169 List<IpAddress> nexthopIpList = rpcResult.getResult().getNexthopipList();
170 return nexthopIpList.get(0).getIpv4Address().getValue();
173 public Optional<String> getGatewayMacAddressForInterface(String vpnName,
174 String ifName, String ipAddress) {
175 VpnPortipToPort gwPort = vpnManager.getNeutronPortFromVpnPortFixedIp(broker, vpnName, ipAddress);
176 return Optional.of(gwPort != null && gwPort.isSubnetIp()
177 ? gwPort.getMacAddress()
178 : interfaceManager.getInterfaceInfoFromOperationalDataStore(ifName).getMacAddress());
182 public String getL3vpnNameFromElan(ElanInstance elanInfo) {
183 if (elanInfo == null) {
184 LOG.debug("getL3vpnNameFromElan :elanInfo is NULL");
187 EvpnAugmentation evpnAugmentation = elanInfo.augmentation(EvpnAugmentation.class);
188 return evpnAugmentation != null ? evpnAugmentation.getL3vpnName() : null;
192 public static String getEvpnNameFromElan(ElanInstance elanInfo) {
193 if (elanInfo == null) {
194 LOG.debug("getEvpnNameFromElan :elanInfo is NULL");
197 EvpnAugmentation evpnAugmentation = elanInfo.augmentation(EvpnAugmentation.class);
198 return evpnAugmentation != null ? evpnAugmentation.getEvpnName() : null;
202 public String getEvpnRd(ElanInstance elanInfo) {
203 String evpnName = getEvpnNameFromElan(elanInfo);
204 if (evpnName == null) {
205 LOG.debug("getEvpnRd : evpnName is NULL for elanInfo {}", elanInfo);
208 return vpnManager.getVpnRd(broker, evpnName);
211 public void advertisePrefix(ElanInstance elanInfo, String macAddress, String prefix,
212 String interfaceName, BigInteger dpnId) {
213 String rd = getEvpnRd(elanInfo);
214 advertisePrefix(elanInfo, rd, macAddress, prefix, interfaceName, dpnId);
217 @SuppressWarnings("checkstyle:IllegalCatch")
218 public void advertisePrefix(ElanInstance elanInfo, String rd,
219 String macAddress, String prefix, String interfaceName, BigInteger dpnId) {
221 LOG.debug("advertisePrefix : rd is NULL for elanInfo {}, macAddress {}", elanInfo, macAddress);
224 String nextHop = getEndpointIpAddressForDPN(dpnId);
225 if (nextHop == null) {
226 LOG.debug("Failed to get the dpn tep ip for dpn {}", dpnId);
230 long l2vni = elanUtils.getVxlanSegmentationId(elanInfo);
232 String gatewayMacAddr = null;
233 String l3VpName = getL3vpnNameFromElan(elanInfo);
234 if (l3VpName != null) {
235 VpnInstance l3VpnInstance = vpnManager.getVpnInstance(broker, l3VpName);
236 l3vni = l3VpnInstance.getL3vni();
237 com.google.common.base.Optional<String> gatewayMac = getGatewayMacAddressForInterface(l3VpName,
238 interfaceName, prefix);
239 gatewayMacAddr = gatewayMac.isPresent() ? gatewayMac.get() : null;
242 LOG.info("Advertising routes with rd {}, macAddress {}, prefix {}, nextHop {},"
243 + " vpnLabel {}, l3vni {}, l2vni {}, gatewayMac {}", rd, macAddress, prefix, nextHop,
244 vpnLabel, l3vni, l2vni, gatewayMacAddr);
246 bgpManager.advertisePrefix(rd, macAddress, prefix, nextHop,
247 VrfEntryBase.EncapType.Vxlan, vpnLabel, l3vni, l2vni, gatewayMacAddr);
248 } catch (Exception e) {
249 LOG.error("Failed to advertisePrefix", e);
253 public void advertisePrefix(ElanInstance elanInfo, MacEntry macEntry) {
254 InterfaceInfo interfaceInfo = interfaceManager.getInterfaceInfo(macEntry.getInterface());
255 if (interfaceInfo == null) {
256 LOG.debug("advertisePrefix, interfaceInfo is null for interface {}", macEntry.getInterface());
260 if (!isIpv4PrefixAvailable.test(macEntry)) {
261 LOG.debug("advertisePrefix macEntry does not have IPv4 prefix {}", macEntry);
264 advertisePrefix(elanInfo, macEntry.getMacAddress().getValue(),
265 macEntry.getIpPrefix().getIpv4Address().getValue(),
266 interfaceInfo.getInterfaceName(), interfaceInfo.getDpId());
269 public void withdrawEvpnRT2Routes(EvpnAugmentation evpnAugmentation, String elanName) {
270 if (evpnAugmentation == null || evpnAugmentation.getEvpnName() == null) {
271 LOG.trace("withdrawEvpnRT2Routes, evpnAugmentation is null");
275 String evpnName = evpnAugmentation.getEvpnName();
276 String rd = vpnManager.getVpnRd(broker, evpnName);
278 LOG.debug("withdrawEvpnRT2Routes : rd is null for {}", elanName);
281 List<MacEntry> macEntries = elanUtils.getElanMacEntries(elanName);
282 if (macEntries == null || macEntries.isEmpty()) {
283 LOG.debug("withdrawEvpnRT2Routes : macEntries is empty for elan {} ", elanName);
286 for (MacEntry macEntry : macEntries) {
287 if (!isIpv4PrefixAvailable.test(macEntry)) {
288 LOG.debug("withdrawEvpnRT2Routes macEntry does not have IPv4 prefix {}", macEntry);
291 String prefix = macEntry.getIpPrefix().getIpv4Address().getValue();
292 LOG.info("Withdrawing routes with rd {}, prefix {}", rd, prefix);
293 bgpManager.withdrawPrefix(rd, prefix);
297 public void withdrawPrefix(ElanInstance elanInfo, String prefix) {
298 String rd = getEvpnRd(elanInfo);
302 bgpManager.withdrawPrefix(rd, prefix);
305 public void withdrawPrefix(ElanInstance elanInfo, MacEntry macEntry) {
306 if (!isIpv4PrefixAvailable.test(macEntry)) {
307 LOG.debug("withdrawPrefix macEntry does not have IPv4 prefix {}", macEntry);
310 withdrawPrefix(elanInfo, macEntry.getIpPrefix().getIpv4Address().getValue());
313 public static InstanceIdentifier<ExternalTunnelList> getExternaTunnelListIdentifier() {
314 return InstanceIdentifier
315 .builder(ExternalTunnelList.class).build();
318 public Optional<ExternalTunnelList> getExternalTunnelList() {
319 InstanceIdentifier<ExternalTunnelList> externalTunnelListId = getExternaTunnelListIdentifier();
320 ExternalTunnelList externalTunnelList = null;
322 externalTunnelList = elanUtils.read2(LogicalDatastoreType.CONFIGURATION,
323 externalTunnelListId).orNull();
324 } catch (ReadFailedException e) {
325 LOG.error("getExternalTunnelList: unable to read ExternalTunnelList, exception ", e);
327 return Optional.fromNullable(externalTunnelList);
330 public static InstanceIdentifier<DcGatewayIpList> getDcGatewayIpListIdentifier() {
331 return InstanceIdentifier
332 .builder(DcGatewayIpList.class).build();
335 public Optional<DcGatewayIpList> getDcGatewayIpList() {
336 InstanceIdentifier<DcGatewayIpList> dcGatewayIpListInstanceIdentifier = getDcGatewayIpListIdentifier();
337 DcGatewayIpList dcGatewayIpListConfig = null;
339 dcGatewayIpListConfig = elanUtils.read2(LogicalDatastoreType.CONFIGURATION,
340 dcGatewayIpListInstanceIdentifier).orNull();
341 } catch (ReadFailedException e) {
342 LOG.error("getDcGatewayTunnelInterfaceNameList: unable to read DcGatewayTunnelList, exception ", e);
344 return Optional.fromNullable(dcGatewayIpListConfig);
347 public List<String> getDcGatewayTunnelInterfaceNameList() {
348 final List<String> tunnelInterfaceNameList = new ArrayList<>();
349 Optional<DcGatewayIpList> dcGatewayIpListOptional = getDcGatewayIpList();
350 if (!dcGatewayIpListOptional.isPresent()) {
351 LOG.info("No DC gateways configured while programming the l2vni table.");
352 return tunnelInterfaceNameList;
354 List<DcGatewayIp> dcGatewayIps = dcGatewayIpListOptional.get().nonnullDcGatewayIp();
356 Optional<ExternalTunnelList> externalTunnelListOptional = getExternalTunnelList();
357 if (!externalTunnelListOptional.isPresent()) {
358 LOG.info("No External Tunnel Configured while programming the l2vni table.");
359 return tunnelInterfaceNameList;
361 List<ExternalTunnel> externalTunnels = externalTunnelListOptional.get().nonnullExternalTunnel();
363 dcGatewayIps.forEach(dcIp -> externalTunnels
365 .filter(externalTunnel -> externalTunnel.getDestinationDevice()
366 .contains(dcIp.getIpAddress().getIpv4Address().toString()))
367 .forEach(externalTunnel -> tunnelInterfaceNameList.add(externalTunnel.getTunnelInterfaceName())));
369 return tunnelInterfaceNameList;
372 public void bindElanServiceToExternalTunnel(String elanName, String interfaceName) {
373 ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, tx -> {
374 int instructionKey = 0;
375 LOG.trace("Binding external interface {} elan {}", interfaceName, elanName);
376 List<Instruction> instructions = new ArrayList<>();
377 instructions.add(MDSALUtil.buildAndGetGotoTableInstruction(
378 NwConstants.L2VNI_EXTERNAL_TUNNEL_DEMUX_TABLE, ++instructionKey));
379 short elanServiceIndex =
380 ServiceIndex.getIndex(NwConstants.ELAN_SERVICE_NAME, NwConstants.ELAN_SERVICE_INDEX);
381 BoundServices serviceInfo = ElanUtils.getBoundServices(
382 ElanUtils.getElanServiceName(elanName, interfaceName), elanServiceIndex,
383 NwConstants.ELAN_SERVICE_INDEX, NwConstants.COOKIE_ELAN_INGRESS_TABLE, instructions);
384 InstanceIdentifier<BoundServices> bindServiceId = ElanUtils.buildServiceId(interfaceName, elanServiceIndex);
385 if (!tx.read(bindServiceId).get().isPresent()) {
386 tx.put(bindServiceId, serviceInfo, WriteTransaction.CREATE_MISSING_PARENTS);
388 }), LOG, "Error binding an ELAN service to an external tunnel");
391 public void unbindElanServiceFromExternalTunnel(String elanName, String interfaceName) {
392 ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, tx -> {
393 LOG.trace("UnBinding external interface {} elan {}", interfaceManager, elanName);
394 short elanServiceIndex =
395 ServiceIndex.getIndex(NwConstants.ELAN_SERVICE_NAME, NwConstants.ELAN_SERVICE_INDEX);
396 InstanceIdentifier<BoundServices> bindServiceId = ElanUtils.buildServiceId(interfaceName, elanServiceIndex);
397 if (tx.read(bindServiceId).get().isPresent()) {
398 tx.delete(bindServiceId);
400 }), LOG, "Error binding an ELAN service to an external tunnel");
403 private List<InstructionInfo> getInstructionsForExtTunnelTable(Long elanTag) {
404 List<InstructionInfo> mkInstructions = new ArrayList<>();
405 mkInstructions.add(new InstructionWriteMetadata(ElanUtils.getElanMetadataLabel(elanTag, false),
406 ElanHelper.getElanMetadataMask()));
407 mkInstructions.add(new InstructionGotoTable(NwConstants.ELAN_DMAC_TABLE));
408 return mkInstructions;
411 private String getFlowRef(long tableId, long elanTag, BigInteger dpnId) {
412 return new StringBuilder().append(tableId).append(elanTag).append(dpnId).toString();
415 private void programEvpnL2vniFlow(ElanInstance elanInfo, BiConsumer<BigInteger, FlowEntity> flowHandler) {
416 long elanTag = elanInfo.getElanTag();
417 List<MatchInfo> mkMatches = new ArrayList<>();
418 mkMatches.add(new MatchTunnelId(BigInteger.valueOf(elanUtils.getVxlanSegmentationId(elanInfo))));
419 NWUtil.getOperativeDPNs(broker).forEach(dpnId -> {
420 LOG.debug("Updating tunnel flow to dpnid {}", dpnId);
421 List<InstructionInfo> instructions = getInstructionsForExtTunnelTable(elanTag);
422 String flowRef = getFlowRef(NwConstants.L2VNI_EXTERNAL_TUNNEL_DEMUX_TABLE, elanTag, dpnId);
423 FlowEntity flowEntity = MDSALUtil.buildFlowEntity(
425 NwConstants.L2VNI_EXTERNAL_TUNNEL_DEMUX_TABLE,
428 elanInfo.getElanInstanceName(), // flowName
431 ITMConstants.COOKIE_ITM_EXTERNAL.add(BigInteger.valueOf(elanTag)),
434 flowHandler.accept(dpnId, flowEntity);
438 public void programEvpnL2vniDemuxTable(String elanName, final BiConsumer<String, String> serviceHandler,
439 BiConsumer<BigInteger, FlowEntity> flowHandler) {
440 ElanInstance elanInfo = elanInstanceCache.get(elanName).orNull();
441 List<String> tunnelInterfaceNameList = getDcGatewayTunnelInterfaceNameList();
442 if (tunnelInterfaceNameList.isEmpty()) {
443 LOG.info("No DC gateways tunnels while programming l2vni table for elan {}.", elanName);
447 tunnelInterfaceNameList.forEach(tunnelInterfaceName -> serviceHandler.accept(elanName, tunnelInterfaceName));
448 programEvpnL2vniFlow(elanInfo, flowHandler);
451 @SuppressWarnings({ "unchecked", "rawtypes" })
452 public <T extends DataObject> void asyncReadAndExecute(final LogicalDatastoreType datastoreType,
453 final InstanceIdentifier<T> iid, final String jobKey, final Function<Optional<T>, Void> function) {
454 jobCoordinator.enqueueJob(jobKey, () -> {
455 SettableFuture<Optional<T>> settableFuture = SettableFuture.create();
456 List futures = Collections.singletonList(settableFuture);
458 try (ReadOnlyTransaction tx = broker.newReadOnlyTransaction()) {
459 Futures.addCallback(tx.read(datastoreType, iid),
460 new SettableFutureCallback<Optional<T>>(settableFuture) {
462 public void onSuccess(Optional<T> data) {
463 function.apply(data);
464 super.onSuccess(data);
466 }, MoreExecutors.directExecutor());
470 }, ElanConstants.JOB_MAX_RETRIES);