[ONOS-7592] Add NullGroupProvider
Change-Id: I7843f235951ce7f7be1345a9c8ff52f7ca88dabc
diff --git a/providers/null/src/main/java/org/onosproject/provider/nil/NullGroupProvider.java b/providers/null/src/main/java/org/onosproject/provider/nil/NullGroupProvider.java
new file mode 100644
index 0000000..3cf175c
--- /dev/null
+++ b/providers/null/src/main/java/org/onosproject/provider/nil/NullGroupProvider.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.provider.nil;
+
+import io.netty.util.Timeout;
+import io.netty.util.TimerTask;
+import org.onlab.util.Timer;
+import org.onosproject.core.GroupId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.group.DefaultGroup;
+import org.onosproject.net.group.Group;
+import org.onosproject.net.group.GroupOperation;
+import org.onosproject.net.group.GroupOperations;
+import org.onosproject.net.group.GroupProvider;
+import org.onosproject.net.group.GroupProviderService;
+import org.slf4j.Logger;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Null provider to accept any group and report them.
+ */
+public class NullGroupProvider extends NullProviders.AbstractNullProvider
+ implements GroupProvider {
+
+ private static final long DEFAULT_POLL_DELAY = 1;
+
+ private final Logger log = getLogger(getClass());
+ private final Map<DeviceId, Map<GroupId, Group>> groupTables = new ConcurrentHashMap<>();
+ private GroupProviderService providerService;
+ private Timeout timeout;
+
+ /**
+ * Start group provider.
+ *
+ * @param providerService group provider service
+ */
+ void start(GroupProviderService providerService) {
+ this.providerService = providerService;
+ timeout = Timer.newTimeout(new StatisticTask(), DEFAULT_POLL_DELAY, TimeUnit.SECONDS);
+ }
+
+ /**
+ * Stops the group provider simulation.
+ */
+ void stop() {
+ timeout.cancel();
+ }
+
+ public void initDevicesGroupTable(Collection<DeviceId> deviceIds) {
+ // Initialize group table for the device
+ deviceIds.forEach(deviceId -> groupTables.put(deviceId, new ConcurrentHashMap<>()));
+ pushGroupMetrics();
+ }
+
+ @Override
+ public void performGroupOperation(DeviceId deviceId, GroupOperations groupOps) {
+ groupOps.operations().forEach(go -> {
+ switch (go.opType()) {
+ case ADD:
+ groupAdd(deviceId, go);
+ break;
+ case MODIFY:
+ groupModify(deviceId, go);
+ break;
+ case DELETE:
+ groupDelete(deviceId, go);
+ break;
+ default:
+ log.warn("Unsupported op type: {}", go.opType());
+ break;
+ }
+ });
+ }
+
+ private void groupAdd(DeviceId deviceId, GroupOperation go) {
+ GroupId gid = go.groupId();
+ DefaultGroup group = new DefaultGroup(gid, deviceId, go.groupType(), go.buckets());
+ group.setState(Group.GroupState.ADDED);
+ groupTables.get(deviceId).put(gid, group);
+ }
+
+ private void groupModify(DeviceId deviceId, GroupOperation go) {
+ groupTables.get(deviceId).computeIfPresent(go.groupId(), (gid, group) -> {
+ DefaultGroup grp = new DefaultGroup(gid, deviceId, go.groupType(), go.buckets());
+ grp.setState(Group.GroupState.ADDED);
+ return grp;
+ });
+ }
+
+ private void groupDelete(DeviceId deviceId, GroupOperation go) {
+ groupTables.get(deviceId).remove(go.groupId());
+ }
+
+ private void pushGroupMetrics() {
+ groupTables.forEach((deviceId, groups) -> {
+ providerService.pushGroupMetrics(deviceId, groups.values());
+ });
+ }
+
+ // Periodically reports flow rule statistics.
+ private class StatisticTask implements TimerTask {
+ @Override
+ public void run(Timeout to) {
+ pushGroupMetrics();
+ timeout = to.timer().newTimeout(to.task(), DEFAULT_POLL_DELAY, TimeUnit.SECONDS);
+ }
+ }
+}