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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.pcep.controller.impl;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
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.Service;
import org.onosproject.pcep.controller.PccId;
import org.onosproject.pcep.controller.PcepClient;
import org.onosproject.pcep.controller.PcepClientController;
import org.onosproject.pcep.controller.PcepClientListener;
import org.onosproject.pcep.controller.PcepEventListener;
import org.onosproject.pcep.controller.driver.PcepAgent;
import org.onosproject.pcepio.protocol.PcepMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.collect.Sets;
/**
* Implementation of PCEP client controller.
*/
@Component(immediate = true)
@Service
public class PcepClientControllerImpl implements PcepClientController {
private static final Logger log = LoggerFactory.getLogger(PcepClientControllerImpl.class);
protected ConcurrentHashMap<PccId, PcepClient> connectedClients =
new ConcurrentHashMap<>();
protected PcepClientAgent agent = new PcepClientAgent();
protected Set<PcepClientListener> pcepClientListener = new HashSet<>();
protected Set<PcepEventListener> pcepEventListener = Sets.newHashSet();
private final Controller ctrl = new Controller();
@Activate
public void activate() {
ctrl.start(agent);
log.info("Started");
}
@Deactivate
public void deactivate() {
// Close all connected clients
closeConnectedClients();
ctrl.stop();
log.info("Stopped");
}
@Override
public Collection<PcepClient> getClients() {
return connectedClients.values();
}
@Override
public PcepClient getClient(PccId pccId) {
return connectedClients.get(pccId);
}
@Override
public void addListener(PcepClientListener listener) {
if (!pcepClientListener.contains(listener)) {
this.pcepClientListener.add(listener);
}
}
@Override
public void removeListener(PcepClientListener listener) {
this.pcepClientListener.remove(listener);
}
@Override
public void addEventListener(PcepEventListener listener) {
pcepEventListener.add(listener);
}
@Override
public void removeEventListener(PcepEventListener listener) {
pcepEventListener.remove(listener);
}
@Override
public void writeMessage(PccId pccId, PcepMessage msg) {
this.getClient(pccId).sendMessage(msg);
}
@Override
public void processClientMessage(PccId pccId, PcepMessage msg) {
PcepClient pc = getClient(pccId);
switch (msg.getType()) {
case NONE:
break;
case OPEN:
break;
case KEEP_ALIVE:
break;
case PATH_COMPUTATION_REQUEST:
break;
case PATH_COMPUTATION_REPLY:
break;
case NOTIFICATION:
break;
case ERROR:
break;
case CLOSE:
log.info("Sending Close Message to {" + pccId.toString() + "}");
pc.sendMessage(Collections.singletonList(pc.factory().buildCloseMsg().build()));
//now disconnect client
pc.disconnectClient();
break;
case REPORT:
for (PcepEventListener l : pcepEventListener) {
l.handleMessage(pccId, msg);
}
break;
case UPDATE:
for (PcepEventListener l : pcepEventListener) {
l.handleMessage(pccId, msg);
}
break;
case INITIATE:
for (PcepEventListener l : pcepEventListener) {
l.handleMessage(pccId, msg);
}
break;
case LABEL_UPDATE:
break;
case MAX:
break;
case END:
break;
default:
break;
}
}
@Override
public void closeConnectedClients() {
PcepClient pc;
for (PccId id : connectedClients.keySet()) {
pc = getClient(id);
pc.disconnectClient();
}
}
/**
* Implementation of an Pcep Agent which is responsible for
* keeping track of connected clients and the state in which
* they are.
*/
public class PcepClientAgent implements PcepAgent {
private final Logger log = LoggerFactory.getLogger(PcepClientAgent.class);
@Override
public boolean addConnectedClient(PccId pccId, PcepClient pc) {
if (connectedClients.get(pccId) != null) {
log.error("Trying to add connectedClient but found a previous "
+ "value for pcc ip: {}", pccId.toString());
return false;
} else {
log.debug("Added Client {}", pccId.toString());
connectedClients.put(pccId, pc);
for (PcepClientListener l : pcepClientListener) {
l.clientConnected(pccId);
}
return true;
}
}
@Override
public boolean validActivation(PccId pccId) {
if (connectedClients.get(pccId) == null) {
log.error("Trying to activate client but is not in "
+ "connected client: pccIp {}. Aborting ..", pccId.toString());
return false;
}
return true;
}
@Override
public void removeConnectedClient(PccId pccId) {
connectedClients.remove(pccId);
for (PcepClientListener l : pcepClientListener) {
log.warn("removal for {}", pccId.toString());
l.clientDisconnected(pccId);
}
}
@Override
public void processPcepMessage(PccId pccId, PcepMessage m) {
processClientMessage(pccId, m);
}
}
}
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