Added BMv2 demo apps (onos1.6 cherry-pick)
Change-Id: I19484a826acce724c1fcd5b6e9910d724bda686f
diff --git a/apps/bmv2-demo/ecmp/src/main/java/org/onosproject/bmv2/demo/app/ecmp/EcmpGroupTreatmentBuilder.java b/apps/bmv2-demo/ecmp/src/main/java/org/onosproject/bmv2/demo/app/ecmp/EcmpGroupTreatmentBuilder.java
new file mode 100644
index 0000000..eee8c59
--- /dev/null
+++ b/apps/bmv2-demo/ecmp/src/main/java/org/onosproject/bmv2/demo/app/ecmp/EcmpGroupTreatmentBuilder.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2016-present 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.bmv2.demo.app.ecmp;
+
+import com.google.common.collect.Maps;
+import org.onlab.util.ImmutableByteSequence;
+import org.onosproject.bmv2.api.context.Bmv2ActionModel;
+import org.onosproject.bmv2.api.runtime.Bmv2Action;
+import org.onosproject.bmv2.api.runtime.Bmv2ExtensionTreatment;
+import org.onosproject.bmv2.api.utils.Bmv2TranslatorUtils;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
+
+import java.util.Map;
+import java.util.Set;
+
+import static org.onosproject.bmv2.api.utils.Bmv2TranslatorUtils.fitByteSequence;
+import static org.onosproject.bmv2.demo.app.ecmp.EcmpFabricApp.ECMP_CONTEXT;
+import static org.onosproject.bmv2.demo.app.ecmp.EcmpInterpreter.*;
+
+/**
+ * Builder of ECMP extension treatments.
+ */
+public class EcmpGroupTreatmentBuilder {
+
+ private static final Map<DeviceId, Map<Set<PortNumber>, Short>> DEVICE_GROUP_ID_MAP = Maps.newHashMap();
+ private int groupId;
+ private int groupSize;
+
+ /**
+ * Sets the group ID.
+ *
+ * @param groupId an integer value
+ * @return this
+ */
+ public EcmpGroupTreatmentBuilder withGroupId(int groupId) {
+ this.groupId = groupId;
+ return this;
+ }
+
+ /**
+ * Sets the group size.
+ *
+ * @param groupSize an integer value
+ * @return this
+ */
+ public EcmpGroupTreatmentBuilder withGroupSize(int groupSize) {
+ this.groupSize = groupSize;
+ return this;
+ }
+
+ /**
+ * Returns a new extension treatment.
+ *
+ * @return an extension treatment
+ */
+ public ExtensionTreatment build() {
+ Bmv2ActionModel actionModel = ECMP_CONTEXT.configuration().action(ECMP_GROUP);
+ int groupIdBitWidth = actionModel.runtimeData(GROUP_ID).bitWidth();
+ int groupSizeBitWidth = actionModel.runtimeData(GROUP_SIZE).bitWidth();
+
+ try {
+ ImmutableByteSequence groupIdBs = fitByteSequence(ImmutableByteSequence.copyFrom(groupId), groupIdBitWidth);
+ ImmutableByteSequence groupSizeBs = fitByteSequence(ImmutableByteSequence.copyFrom(groupSize),
+ groupSizeBitWidth);
+
+ return new Bmv2ExtensionTreatment(Bmv2Action.builder()
+ .withName(ECMP_GROUP)
+ .addParameter(groupIdBs)
+ .addParameter(groupSizeBs)
+ .build());
+
+ } catch (Bmv2TranslatorUtils.ByteSequenceFitException e) {
+ throw new RuntimeException(e);
+ }
+ }
+
+ /**
+ * Returns a group ID for the given device and set of ports.
+ *
+ * @param deviceId a device ID
+ * @param ports a set of ports
+ * @return an integer value
+ */
+ public static int groupIdOf(DeviceId deviceId, Set<PortNumber> ports) {
+ DEVICE_GROUP_ID_MAP.putIfAbsent(deviceId, Maps.newHashMap());
+ // Counts the number of unique portNumber sets for each deviceId.
+ // Each distinct set of portNumbers will have a unique ID.
+ return DEVICE_GROUP_ID_MAP.get(deviceId).computeIfAbsent(ports, (pp) ->
+ (short) (DEVICE_GROUP_ID_MAP.get(deviceId).size() + 1));
+ }
+}