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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.intentperf;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
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.apache.felix.scr.annotations.Service;
import org.onlab.osgi.ServiceDirectory;
import org.onosproject.intentperf.IntentPerfCollector.Sample;
import org.onosproject.ui.RequestHandler;
import org.onosproject.ui.UiConnection;
import org.onosproject.ui.UiExtension;
import org.onosproject.ui.UiExtensionService;
import org.onosproject.ui.UiMessageHandler;
import org.onosproject.ui.UiView;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import static java.util.Collections.synchronizedSet;
import static org.onosproject.ui.UiView.Category.OTHER;
/**
* Mechanism to stream data to the GUI.
*/
@Component(immediate = true, enabled = true)
@Service(value = IntentPerfUi.class)
public class IntentPerfUi {
private static final String INTENT_PERF_START = "intentPerfStart";
private static final String INTENT_PERF_STOP = "intentPerfStop";
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected UiExtensionService uiExtensionService;
private final Set<StreamingControl> handlers = synchronizedSet(new HashSet<>());
private List<UiView> views = ImmutableList.of(
new UiView(OTHER, "intentPerf", "Intent Performance")
);
private UiExtension uiExtension =
new UiExtension.Builder(getClass().getClassLoader(), views)
.messageHandlerFactory(this::newHandlers)
.build();
private IntentPerfCollector collector;
@Activate
protected void activate() {
uiExtensionService.register(uiExtension);
}
@Deactivate
protected void deactivate() {
uiExtensionService.unregister(uiExtension);
}
/**
* Reports a single sample of performance data.
*
* @param sample performance sample
*/
public void reportSample(Sample sample) {
synchronized (handlers) {
handlers.forEach(h -> h.send(sample));
}
}
/**
* Binds the sample collector.
*
* @param collector list of headers for future samples
*/
public void setCollector(IntentPerfCollector collector) {
this.collector = collector;
}
// Creates and returns session specific message handler.
private Collection<UiMessageHandler> newHandlers() {
return ImmutableList.of(new StreamingControl());
}
// UI Message handlers for turning on/off reporting to a session.
private class StreamingControl extends UiMessageHandler {
private boolean streamingEnabled = false;
@Override
protected Collection<RequestHandler> createRequestHandlers() {
return ImmutableSet.of(
new IntentPerfStart(),
new IntentPerfStop()
);
}
@Override
public void init(UiConnection connection, ServiceDirectory directory) {
super.init(connection, directory);
handlers.add(this);
}
@Override
public void destroy() {
super.destroy();
handlers.remove(this);
}
private void send(Sample sample) {
if (streamingEnabled) {
connection().sendMessage("intentPerfSample", 0, sampleNode(sample));
}
}
private ObjectNode sampleNode(Sample sample) {
ObjectNode sampleNode = objectNode();
ArrayNode an = arrayNode();
sampleNode.put("time", sample.time);
sampleNode.set("data", an);
for (double d : sample.data) {
an.add(d);
}
return sampleNode;
}
// ======================================================================
private final class IntentPerfStart extends RequestHandler {
private IntentPerfStart() {
super(INTENT_PERF_START);
}
@Override
public void process(long sid, ObjectNode payload) {
streamingEnabled = true;
sendInitData();
}
private void sendInitData() {
ObjectNode rootNode = MAPPER.createObjectNode();
ArrayNode an = MAPPER.createArrayNode();
ArrayNode sn = MAPPER.createArrayNode();
rootNode.set("headers", an);
rootNode.set("samples", sn);
collector.getSampleHeaders().forEach(an::add);
collector.getSamples().forEach(s -> sn.add(sampleNode(s)));
sendMessage("intentPerfInit", 0, rootNode);
}
}
// ======================================================================
private final class IntentPerfStop extends RequestHandler {
private IntentPerfStop() {
super(INTENT_PERF_STOP);
}
@Override
public void process(long sid, ObjectNode payload) {
streamingEnabled = false;
}
}
}
}
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