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/*
* 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 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.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.PathIntent;
import org.onosproject.net.resource.link.LinkResourceAllocations;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
@Component(immediate = true)
public class PathIntentCompiler implements IntentCompiler<PathIntent> {
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected CoreService coreService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected IntentExtensionService intentManager;
private ApplicationId appId;
@Activate
public void activate() {
appId = coreService.registerApplication("org.onosproject.net.intent");
intentManager.registerCompiler(PathIntent.class, this);
}
@Deactivate
public void deactivate() {
intentManager.unregisterCompiler(PathIntent.class);
}
@Override
public List<Intent> compile(PathIntent intent, List<Intent> installable,
Set<LinkResourceAllocations> resources) {
// Note: right now recompile is not considered
// TODO: implement recompile behavior
List<Link> links = intent.path().links();
List<FlowRule> rules = new ArrayList<>(links.size() - 1);
for (int i = 0; i < links.size() - 1; i++) {
ConnectPoint ingress = links.get(i).dst();
ConnectPoint egress = links.get(i + 1).src();
FlowRule rule = createFlowRule(intent.selector(), intent.treatment(),
ingress, egress, intent.priority(),
isLast(links, i));
rules.add(rule);
}
return Collections.singletonList(new FlowRuleIntent(appId, null, rules, intent.resources()));
}
private FlowRule createFlowRule(TrafficSelector originalSelector, TrafficTreatment originalTreatment,
ConnectPoint ingress, ConnectPoint egress,
int priority, boolean last) {
TrafficSelector selector = DefaultTrafficSelector.builder(originalSelector)
.matchInPort(ingress.port())
.build();
TrafficTreatment.Builder treatmentBuilder;
if (last) {
treatmentBuilder = DefaultTrafficTreatment.builder(originalTreatment);
} else {
treatmentBuilder = DefaultTrafficTreatment.builder();
}
TrafficTreatment treatment = treatmentBuilder.setOutput(egress.port()).build();
return DefaultFlowRule.builder()
.forDevice(ingress.deviceId())
.withSelector(selector)
.withTreatment(treatment)
.withPriority(priority)
.fromApp(appId)
.makePermanent()
.build();
}
private boolean isLast(List<Link> links, int i) {
return i == links.size() - 2;
}
}
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