Drivers for Centec and Pica8 switches
Change-Id: I390c70716560275af7ee8bd40e6d161b6ed3b58f
diff --git a/drivers/src/main/java/org/onosproject/driver/pipeline/PicaPipeline.java b/drivers/src/main/java/org/onosproject/driver/pipeline/PicaPipeline.java
new file mode 100644
index 0000000..82be0e4
--- /dev/null
+++ b/drivers/src/main/java/org/onosproject/driver/pipeline/PicaPipeline.java
@@ -0,0 +1,659 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed 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.
+ */
+package org.onosproject.driver.pipeline;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.RemovalCause;
+import com.google.common.cache.RemovalNotification;
+
+import org.onlab.osgi.ServiceDirectory;
+import org.onlab.packet.Ethernet;
+import org.onlab.packet.IPv4;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.behaviour.NextGroup;
+import org.onosproject.net.behaviour.Pipeliner;
+import org.onosproject.net.behaviour.PipelinerContext;
+import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.onosproject.net.flow.DefaultFlowRule;
+import org.onosproject.net.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+import org.onosproject.net.flow.FlowRule;
+import org.onosproject.net.flow.FlowRuleOperations;
+import org.onosproject.net.flow.FlowRuleOperationsContext;
+import org.onosproject.net.flow.FlowRuleService;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.flow.criteria.Criteria;
+import org.onosproject.net.flow.criteria.Criterion;
+import org.onosproject.net.flow.criteria.EthCriterion;
+import org.onosproject.net.flow.criteria.EthTypeCriterion;
+import org.onosproject.net.flow.criteria.IPCriterion;
+import org.onosproject.net.flow.criteria.IPProtocolCriterion;
+import org.onosproject.net.flow.criteria.PortCriterion;
+import org.onosproject.net.flow.criteria.VlanIdCriterion;
+import org.onosproject.net.flowobjective.FilteringObjective;
+import org.onosproject.net.flowobjective.FlowObjectiveStore;
+import org.onosproject.net.flowobjective.ForwardingObjective;
+import org.onosproject.net.flowobjective.NextObjective;
+import org.onosproject.net.flowobjective.Objective;
+import org.onosproject.net.flowobjective.ObjectiveError;
+import org.onosproject.net.group.DefaultGroupBucket;
+import org.onosproject.net.group.DefaultGroupDescription;
+import org.onosproject.net.group.DefaultGroupKey;
+import org.onosproject.net.group.Group;
+import org.onosproject.net.group.GroupBucket;
+import org.onosproject.net.group.GroupBuckets;
+import org.onosproject.net.group.GroupDescription;
+import org.onosproject.net.group.GroupEvent;
+import org.onosproject.net.group.GroupKey;
+import org.onosproject.net.group.GroupListener;
+import org.onosproject.net.group.GroupService;
+import org.slf4j.Logger;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Set;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+import static org.onlab.util.Tools.groupedThreads;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Pica pipeline handler.
+ */
+public class PicaPipeline extends AbstractHandlerBehaviour implements Pipeliner {
+
+ protected static final int VLAN_TABLE = 252;
+ protected static final int ETHTYPE_TABLE = 252;
+ protected static final int IP_UNICAST_TABLE = 251;
+ protected static final int ACL_TABLE = 251;
+
+ private static final int CONTROLLER_PRIORITY = 255;
+ private static final int DROP_PRIORITY = 0;
+ private static final int HIGHEST_PRIORITY = 0xffff;
+
+ private final Logger log = getLogger(getClass());
+
+ private ServiceDirectory serviceDirectory;
+ private FlowRuleService flowRuleService;
+ private CoreService coreService;
+ private GroupService groupService;
+ private FlowObjectiveStore flowObjectiveStore;
+ private DeviceId deviceId;
+ private ApplicationId appId;
+
+ private KryoNamespace appKryo = new KryoNamespace.Builder()
+ .register(GroupKey.class)
+ .register(DefaultGroupKey.class)
+ .register(PicaGroup.class)
+ .register(byte[].class)
+ .build();
+
+ private Cache<GroupKey, NextObjective> pendingGroups;
+
+ private ScheduledExecutorService groupChecker =
+ Executors.newScheduledThreadPool(2, groupedThreads("onos/pipeliner",
+ "ovs-pica-%d"));
+
+ @Override
+ public void init(DeviceId deviceId, PipelinerContext context) {
+ this.serviceDirectory = context.directory();
+ this.deviceId = deviceId;
+
+ pendingGroups = CacheBuilder.newBuilder()
+ .expireAfterWrite(20, TimeUnit.SECONDS)
+ .removalListener((RemovalNotification<GroupKey, NextObjective> notification) -> {
+ if (notification.getCause() == RemovalCause.EXPIRED) {
+ fail(notification.getValue(), ObjectiveError.GROUPINSTALLATIONFAILED);
+ }
+ }).build();
+
+ groupChecker.scheduleAtFixedRate(new GroupChecker(), 0, 500, TimeUnit.MILLISECONDS);
+
+ coreService = serviceDirectory.get(CoreService.class);
+ flowRuleService = serviceDirectory.get(FlowRuleService.class);
+ groupService = serviceDirectory.get(GroupService.class);
+ flowObjectiveStore = context.store();
+
+ groupService.addListener(new InnerGroupListener());
+
+ appId = coreService.registerApplication(
+ "org.onosproject.driver.OVSPicaPipeline");
+
+ initializePipeline();
+ }
+
+ @Override
+ public void filter(FilteringObjective filteringObjective) {
+ if (filteringObjective.type() == FilteringObjective.Type.PERMIT) {
+ processFilter(filteringObjective,
+ filteringObjective.op() == Objective.Operation.ADD,
+ filteringObjective.appId());
+ } else {
+ fail(filteringObjective, ObjectiveError.UNSUPPORTED);
+ }
+ }
+
+ @Override
+ public void forward(ForwardingObjective fwd) {
+ Collection<FlowRule> rules;
+ FlowRuleOperations.Builder flowBuilder = FlowRuleOperations.builder();
+
+ rules = processForward(fwd);
+ switch (fwd.op()) {
+ case ADD:
+ rules.stream()
+ .filter(rule -> rule != null)
+ .forEach(flowBuilder::add);
+ break;
+ case REMOVE:
+ rules.stream()
+ .filter(rule -> rule != null)
+ .forEach(flowBuilder::remove);
+ break;
+ default:
+ fail(fwd, ObjectiveError.UNKNOWN);
+ log.warn("Unknown forwarding type {}", fwd.op());
+ }
+
+
+ flowRuleService.apply(flowBuilder.build(new FlowRuleOperationsContext() {
+ @Override
+ public void onSuccess(FlowRuleOperations ops) {
+ pass(fwd);
+ }
+
+ @Override
+ public void onError(FlowRuleOperations ops) {
+ fail(fwd, ObjectiveError.FLOWINSTALLATIONFAILED);
+ }
+ }));
+
+ }
+
+ @Override
+ public void next(NextObjective nextObjective) {
+ switch (nextObjective.type()) {
+ case SIMPLE:
+ Collection<TrafficTreatment> treatments = nextObjective.next();
+ if (treatments.size() == 1) {
+ TrafficTreatment treatment = treatments.iterator().next();
+ GroupBucket bucket =
+ DefaultGroupBucket.createIndirectGroupBucket(treatment);
+ final GroupKey key = new DefaultGroupKey(appKryo.serialize(nextObjective.id()));
+ GroupDescription groupDescription
+ = new DefaultGroupDescription(deviceId,
+ GroupDescription.Type.INDIRECT,
+ new GroupBuckets(Collections
+ .singletonList(bucket)),
+ key,
+ null, // let group service determine group id
+ nextObjective.appId());
+ groupService.addGroup(groupDescription);
+ pendingGroups.put(key, nextObjective);
+ }
+ break;
+ case HASHED:
+ case BROADCAST:
+ case FAILOVER:
+ fail(nextObjective, ObjectiveError.UNSUPPORTED);
+ log.warn("Unsupported next objective type {}", nextObjective.type());
+ break;
+ default:
+ fail(nextObjective, ObjectiveError.UNKNOWN);
+ log.warn("Unknown next objective type {}", nextObjective.type());
+ }
+
+ }
+
+ private Collection<FlowRule> processForward(ForwardingObjective fwd) {
+ switch (fwd.flag()) {
+ case SPECIFIC:
+ return processSpecific(fwd);
+ case VERSATILE:
+ return processVersatile(fwd);
+ default:
+ fail(fwd, ObjectiveError.UNKNOWN);
+ log.warn("Unknown forwarding flag {}", fwd.flag());
+ }
+ return Collections.emptySet();
+ }
+
+ private Collection<FlowRule> processVersatile(ForwardingObjective fwd) {
+ log.debug("Processing versatile forwarding objective");
+ TrafficSelector selector = fwd.selector();
+
+ EthTypeCriterion ethType =
+ (EthTypeCriterion) selector.getCriterion(Criterion.Type.ETH_TYPE);
+ if (ethType == null) {
+ log.error("Versatile forwarding objective must include ethType");
+ fail(fwd, ObjectiveError.UNKNOWN);
+ return Collections.emptySet();
+ }
+ if (ethType.ethType() == Ethernet.TYPE_ARP) {
+ log.warn("Driver automatically handles ARP packets by punting to controller "
+ + " from ETHER table");
+ pass(fwd);
+ return Collections.emptySet();
+ } else if (ethType.ethType() == Ethernet.TYPE_LLDP ||
+ ethType.ethType() == Ethernet.TYPE_BSN) {
+ log.warn("Driver currently does not currently handle LLDP packets");
+ fail(fwd, ObjectiveError.UNSUPPORTED);
+ return Collections.emptySet();
+ } else if (ethType.ethType() == Ethernet.TYPE_IPV4) {
+ IPCriterion ipSrc = (IPCriterion) selector
+ .getCriterion(Criterion.Type.IPV4_SRC);
+ IPCriterion ipDst = (IPCriterion) selector
+ .getCriterion(Criterion.Type.IPV4_DST);
+ IPProtocolCriterion ipProto = (IPProtocolCriterion) selector
+ .getCriterion(Criterion.Type.IP_PROTO);
+ if (ipSrc != null) {
+ log.warn("Driver does not currently handle matching Src IP");
+ fail(fwd, ObjectiveError.UNSUPPORTED);
+ return Collections.emptySet();
+ }
+ if (ipDst != null) {
+ log.error("Driver handles Dst IP matching as specific forwarding "
+ + "objective, not versatile");
+ fail(fwd, ObjectiveError.UNSUPPORTED);
+ return Collections.emptySet();
+ }
+ if (ipProto != null && ipProto.protocol() == IPv4.PROTOCOL_TCP) {
+ log.warn("Driver automatically punts all packets reaching the "
+ + "LOCAL table to the controller");
+ pass(fwd);
+ return Collections.emptySet();
+ }
+ }
+
+ log.warn("Driver does not support given versatile forwarding objective");
+ fail(fwd, ObjectiveError.UNSUPPORTED);
+ return Collections.emptySet();
+ }
+
+ private Collection<FlowRule> processSpecific(ForwardingObjective fwd) {
+ log.debug("Processing specific forwarding objective");
+ TrafficSelector selector = fwd.selector();
+ EthTypeCriterion ethType =
+ (EthTypeCriterion) selector.getCriterion(Criterion.Type.ETH_TYPE);
+ if (ethType == null || ethType.ethType() != Ethernet.TYPE_IPV4) {
+ fail(fwd, ObjectiveError.UNSUPPORTED);
+ return Collections.emptySet();
+ }
+
+ TrafficSelector filteredSelector =
+ DefaultTrafficSelector.builder()
+ .matchEthType(Ethernet.TYPE_IPV4)
+ .matchIPDst(
+ ((IPCriterion)
+ selector.getCriterion(Criterion.Type.IPV4_DST)).ip())
+ .build();
+
+ TrafficTreatment.Builder tb = DefaultTrafficTreatment.builder();
+
+ if (fwd.nextId() != null) {
+ NextGroup next = flowObjectiveStore.getNextGroup(fwd.nextId());
+ GroupKey key = appKryo.deserialize(next.data());
+ Group group = groupService.getGroup(deviceId, key);
+ if (group == null) {
+ log.warn("The group left!");
+ fail(fwd, ObjectiveError.GROUPMISSING);
+ return Collections.emptySet();
+ }
+ tb.group(group.id());
+ }
+
+ FlowRule.Builder ruleBuilder = DefaultFlowRule.builder()
+ .fromApp(fwd.appId())
+ .withPriority(fwd.priority())
+ .forDevice(deviceId)
+ .withSelector(filteredSelector)
+ .withTreatment(tb.build());
+
+ if (fwd.permanent()) {
+ ruleBuilder.makePermanent();
+ } else {
+ ruleBuilder.makeTemporary(fwd.timeout());
+ }
+
+ ruleBuilder.forTable(IP_UNICAST_TABLE);
+
+
+ return Collections.singletonList(ruleBuilder.build());
+
+ }
+
+ private void processFilter(FilteringObjective filt, boolean install,
+ ApplicationId applicationId) {
+ // This driver only processes filtering criteria defined with switch
+ // ports as the key
+ PortCriterion p;
+ if (!filt.key().equals(Criteria.dummy()) &&
+ filt.key().type() == Criterion.Type.IN_PORT) {
+ p = (PortCriterion) filt.key();
+ } else {
+ log.warn("No key defined in filtering objective from app: {}. Not"
+ + "processing filtering objective", applicationId);
+ fail(filt, ObjectiveError.UNKNOWN);
+ return;
+ }
+ // convert filtering conditions for switch-intfs into flowrules
+ FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
+ for (Criterion c : filt.conditions()) {
+ if (c.type() == Criterion.Type.ETH_DST) {
+ EthCriterion e = (EthCriterion) c;
+ log.debug("adding rule for MAC: {}", e.mac());
+ TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+ TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+ selector.matchEthDst(e.mac());
+ treatment.transition(IP_UNICAST_TABLE);
+ FlowRule rule = DefaultFlowRule.builder()
+ .forDevice(deviceId)
+ .withSelector(selector.build())
+ .withTreatment(treatment.build())
+ .withPriority(CONTROLLER_PRIORITY)
+ .fromApp(applicationId)
+ .makePermanent()
+ .forTable(ETHTYPE_TABLE).build();
+ ops = install ? ops.add(rule) : ops.remove(rule);
+ } else if (c.type() == Criterion.Type.VLAN_VID) {
+ VlanIdCriterion v = (VlanIdCriterion) c;
+ log.debug("adding rule for VLAN: {}", v.vlanId());
+ TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+ TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+ selector.matchVlanId(v.vlanId());
+ selector.matchInPort(p.port());
+ treatment.transition(ETHTYPE_TABLE);
+ treatment.deferred().popVlan();
+ FlowRule rule = DefaultFlowRule.builder()
+ .forDevice(deviceId)
+ .withSelector(selector.build())
+ .withTreatment(treatment.build())
+ .withPriority(CONTROLLER_PRIORITY)
+ .fromApp(applicationId)
+ .makePermanent()
+ .forTable(VLAN_TABLE).build();
+ ops = install ? ops.add(rule) : ops.remove(rule);
+ } else if (c.type() == Criterion.Type.IPV4_DST) {
+ IPCriterion ip = (IPCriterion) c;
+ log.debug("adding rule for IP: {}", ip.ip());
+ TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+ TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+ selector.matchEthType(Ethernet.TYPE_IPV4);
+ selector.matchIPDst(ip.ip());
+ treatment.transition(ACL_TABLE);
+ FlowRule rule = DefaultFlowRule.builder()
+ .forDevice(deviceId)
+ .withSelector(selector.build())
+ .withTreatment(treatment.build())
+ .withPriority(HIGHEST_PRIORITY)
+ .fromApp(applicationId)
+ .makePermanent()
+ .forTable(IP_UNICAST_TABLE).build();
+
+ ops = install ? ops.add(rule) : ops.remove(rule);
+ } else {
+ log.warn("Driver does not currently process filtering condition"
+ + " of type: {}", c.type());
+ fail(filt, ObjectiveError.UNSUPPORTED);
+ }
+ }
+ // apply filtering flow rules
+ flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
+ @Override
+ public void onSuccess(FlowRuleOperations ops) {
+ pass(filt);
+ log.info("Applied filtering rules");
+ }
+
+ @Override
+ public void onError(FlowRuleOperations ops) {
+ fail(filt, ObjectiveError.FLOWINSTALLATIONFAILED);
+ log.info("Failed to apply filtering rules");
+ }
+ }));
+ }
+
+ private void pass(Objective obj) {
+ if (obj.context().isPresent()) {
+ obj.context().get().onSuccess(obj);
+ }
+ }
+
+ private void fail(Objective obj, ObjectiveError error) {
+ if (obj.context().isPresent()) {
+ obj.context().get().onError(obj, error);
+ }
+ }
+
+ private void initializePipeline() {
+ processVlanTable(true);
+ processEtherTable(true);
+ processIpUnicastTable(true);
+ //processACLTable(true);
+ }
+
+ private void processVlanTable(boolean install) {
+ TrafficSelector.Builder selector;
+ TrafficTreatment.Builder treatment;
+ FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
+ FlowRule rule;
+
+
+ //Drop rule
+ selector = DefaultTrafficSelector.builder();
+ treatment = DefaultTrafficTreatment.builder();
+
+ treatment.drop();
+
+ rule = DefaultFlowRule.builder()
+ .forDevice(deviceId)
+ .withSelector(selector.build())
+ .withTreatment(treatment.build())
+ .withPriority(DROP_PRIORITY)
+ .fromApp(appId)
+ .makePermanent()
+ .forTable(VLAN_TABLE).build();
+
+ ops = install ? ops.add(rule) : ops.remove(rule);
+
+ flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
+ @Override
+ public void onSuccess(FlowRuleOperations ops) {
+ log.info("Provisioned vlan table");
+ }
+
+ @Override
+ public void onError(FlowRuleOperations ops) {
+ log.info("Failed to provision vlan table");
+ }
+ }));
+ }
+
+ private void processEtherTable(boolean install) {
+ TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+ TrafficTreatment.Builder treatment = DefaultTrafficTreatment
+ .builder();
+ FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
+ FlowRule rule;
+
+ selector.matchEthType(Ethernet.TYPE_ARP);
+ treatment.punt();
+
+ rule = DefaultFlowRule.builder()
+ .forDevice(deviceId)
+ .withSelector(selector.build())
+ .withTreatment(treatment.build())
+ .withPriority(CONTROLLER_PRIORITY)
+ .fromApp(appId)
+ .makePermanent()
+ .forTable(ETHTYPE_TABLE).build();
+
+ ops = install ? ops.add(rule) : ops.remove(rule);
+
+ selector = DefaultTrafficSelector.builder();
+ treatment = DefaultTrafficTreatment.builder();
+
+ selector.matchEthType(Ethernet.TYPE_IPV4);
+ treatment.transition(IP_UNICAST_TABLE);
+
+ rule = DefaultFlowRule.builder()
+ .forDevice(deviceId)
+ .withPriority(CONTROLLER_PRIORITY)
+ .withSelector(selector.build())
+ .withTreatment(treatment.build())
+ .fromApp(appId)
+ .makePermanent()
+ .forTable(ETHTYPE_TABLE).build();
+
+ ops = install ? ops.add(rule) : ops.remove(rule);
+
+ //Drop rule
+ selector = DefaultTrafficSelector.builder();
+ treatment = DefaultTrafficTreatment.builder();
+
+ treatment.drop();
+
+ rule = DefaultFlowRule.builder()
+ .forDevice(deviceId)
+ .withSelector(selector.build())
+ .withTreatment(treatment.build())
+ .withPriority(DROP_PRIORITY)
+ .fromApp(appId)
+ .makePermanent()
+ .forTable(ETHTYPE_TABLE).build();
+
+
+ ops = install ? ops.add(rule) : ops.remove(rule);
+
+ flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
+ @Override
+ public void onSuccess(FlowRuleOperations ops) {
+ log.info("Provisioned ether table");
+ }
+
+ @Override
+ public void onError(FlowRuleOperations ops) {
+ log.info("Failed to provision ether table");
+ }
+ }));
+
+ }
+
+
+ private void processIpUnicastTable(boolean install) {
+ TrafficSelector.Builder selector;
+ TrafficTreatment.Builder treatment;
+ FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
+ FlowRule rule;
+
+ //Drop rule
+ selector = DefaultTrafficSelector.builder();
+ treatment = DefaultTrafficTreatment.builder();
+
+ treatment.drop();
+
+ rule = DefaultFlowRule.builder()
+ .forDevice(deviceId)
+ .withSelector(selector.build())
+ .withTreatment(treatment.build())
+ .withPriority(DROP_PRIORITY)
+ .fromApp(appId)
+ .makePermanent()
+ .forTable(IP_UNICAST_TABLE).build();
+
+ ops = install ? ops.add(rule) : ops.remove(rule);
+
+ flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
+ @Override
+ public void onSuccess(FlowRuleOperations ops) {
+ log.info("Provisioned FIB table");
+ }
+
+ @Override
+ public void onError(FlowRuleOperations ops) {
+ log.info("Failed to provision FIB table");
+ }
+ }));
+ }
+
+
+ private class InnerGroupListener implements GroupListener {
+ @Override
+ public void event(GroupEvent event) {
+ if (event.type() == GroupEvent.Type.GROUP_ADDED) {
+ GroupKey key = event.subject().appCookie();
+
+ NextObjective obj = pendingGroups.getIfPresent(key);
+ if (obj != null) {
+ flowObjectiveStore.putNextGroup(obj.id(), new PicaGroup(key));
+ pass(obj);
+ pendingGroups.invalidate(key);
+ }
+ }
+ }
+ }
+
+
+ private class GroupChecker implements Runnable {
+
+ @Override
+ public void run() {
+ Set<GroupKey> keys = pendingGroups.asMap().keySet().stream()
+ .filter(key -> groupService.getGroup(deviceId, key) != null)
+ .collect(Collectors.toSet());
+
+ keys.stream().forEach(key -> {
+ NextObjective obj = pendingGroups.getIfPresent(key);
+ if (obj == null) {
+ return;
+ }
+ pass(obj);
+ pendingGroups.invalidate(key);
+ log.info("Heard back from group service for group {}. "
+ + "Applying pending forwarding objectives", obj.id());
+ flowObjectiveStore.putNextGroup(obj.id(), new PicaGroup(key));
+ });
+ }
+ }
+
+ private class PicaGroup implements NextGroup {
+
+ private final GroupKey key;
+
+ public PicaGroup(GroupKey key) {
+ this.key = key;
+ }
+
+ @SuppressWarnings("unused")
+ public GroupKey key() {
+ return key;
+ }
+
+ @Override
+ public byte[] data() {
+ return appKryo.serialize(key);
+ }
+
+ }
+}