Java tutorial
/* * 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.net.intent.impl.compiler; import com.google.common.collect.Lists; import org.apache.felix.scr.annotations.Activate; import org.apache.felix.scr.annotations.Component; import org.apache.felix.scr.annotations.Deactivate; import org.apache.felix.scr.annotations.Reference; import org.apache.felix.scr.annotations.ReferenceCardinality; import org.onosproject.core.ApplicationId; import org.onosproject.core.CoreService; import org.onosproject.net.ConnectPoint; import org.onosproject.net.Link; 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.TrafficSelector; import org.onosproject.net.flow.TrafficTreatment; import org.onosproject.net.flow.criteria.Criteria; import org.onosproject.net.flow.instructions.Instructions; import org.onosproject.net.intent.FlowRuleIntent; import org.onosproject.net.intent.Intent; import org.onosproject.net.intent.IntentCompiler; import org.onosproject.net.intent.IntentExtensionService; import org.onosproject.net.intent.OpticalPathIntent; import org.onosproject.net.resource.link.LinkResourceAllocations; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Collections; import java.util.LinkedList; import java.util.List; import java.util.Set; @Component(immediate = true) public class OpticalPathIntentCompiler implements IntentCompiler<OpticalPathIntent> { private static final Logger log = LoggerFactory.getLogger(OpticalPathIntentCompiler.class); @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) protected IntentExtensionService intentManager; @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) protected CoreService coreService; private ApplicationId appId; @Activate public void activate() { appId = coreService.registerApplication("org.onosproject.net.intent"); intentManager.registerCompiler(OpticalPathIntent.class, this); } @Deactivate public void deactivate() { intentManager.unregisterCompiler(OpticalPathIntent.class); } @Override public List<Intent> compile(OpticalPathIntent intent, List<Intent> installable, Set<LinkResourceAllocations> resources) { log.debug("Compiling optical path intent between {} and {}", intent.src(), intent.dst()); // Create rules for forward and reverse path List<FlowRule> rules = createRules(intent); if (intent.isBidirectional()) { rules.addAll(createReverseRules(intent)); } return Collections.singletonList(new FlowRuleIntent(appId, rules, intent.resources())); } /** * Create rules for the forward path of the intent. * * @param intent the intent * @return list of flow rules */ private List<FlowRule> createRules(OpticalPathIntent intent) { TrafficSelector.Builder selectorBuilder = DefaultTrafficSelector.builder(); selectorBuilder.matchInPort(intent.src().port()); List<FlowRule> rules = new LinkedList<>(); ConnectPoint current = intent.src(); for (Link link : intent.path().links()) { TrafficTreatment.Builder treatmentBuilder = DefaultTrafficTreatment.builder(); treatmentBuilder.add(Instructions.modL0Lambda(intent.lambda())); treatmentBuilder.setOutput(link.src().port()); FlowRule rule = DefaultFlowRule.builder().forDevice(current.deviceId()) .withSelector(selectorBuilder.build()).withTreatment(treatmentBuilder.build()) .withPriority(intent.priority()).fromApp(appId).makePermanent().build(); rules.add(rule); current = link.dst(); selectorBuilder.matchInPort(link.dst().port()); selectorBuilder.add(Criteria.matchLambda(intent.lambda())); selectorBuilder.add(Criteria.matchOchSignalType(intent.signalType())); } // Build the egress ROADM rule TrafficTreatment.Builder treatmentLast = DefaultTrafficTreatment.builder(); treatmentLast.setOutput(intent.dst().port()); FlowRule rule = new DefaultFlowRule.Builder().forDevice(intent.dst().deviceId()) .withSelector(selectorBuilder.build()).withTreatment(treatmentLast.build()) .withPriority(intent.priority()).fromApp(appId).makePermanent().build(); rules.add(rule); return rules; } /** * Create rules for the reverse path of the intent. * * @param intent the intent * @return list of flow rules */ private List<FlowRule> createReverseRules(OpticalPathIntent intent) { TrafficSelector.Builder selectorBuilder = DefaultTrafficSelector.builder(); selectorBuilder.matchInPort(intent.dst().port()); List<FlowRule> rules = new LinkedList<>(); ConnectPoint current = intent.dst(); for (Link link : Lists.reverse(intent.path().links())) { TrafficTreatment.Builder treatmentBuilder = DefaultTrafficTreatment.builder(); treatmentBuilder.add(Instructions.modL0Lambda(intent.lambda())); treatmentBuilder.setOutput(link.dst().port()); FlowRule rule = DefaultFlowRule.builder().forDevice(current.deviceId()) .withSelector(selectorBuilder.build()).withTreatment(treatmentBuilder.build()) .withPriority(intent.priority()).fromApp(appId).makePermanent().build(); rules.add(rule); current = link.src(); selectorBuilder.matchInPort(link.src().port()); selectorBuilder.add(Criteria.matchLambda(intent.lambda())); selectorBuilder.add(Criteria.matchOchSignalType(intent.signalType())); } // Build the egress ROADM rule TrafficTreatment.Builder treatmentLast = DefaultTrafficTreatment.builder(); treatmentLast.setOutput(intent.src().port()); FlowRule rule = new DefaultFlowRule.Builder().forDevice(intent.src().deviceId()) .withSelector(selectorBuilder.build()).withTreatment(treatmentLast.build()) .withPriority(intent.priority()).fromApp(appId).makePermanent().build(); rules.add(rule); return rules; } }