| /* |
| * Copyright 2014 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.onlab.onos.gui; |
| |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.node.ArrayNode; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import org.eclipse.jetty.websocket.WebSocket; |
| import org.onlab.onos.cluster.ClusterEvent; |
| import org.onlab.onos.cluster.ClusterEventListener; |
| import org.onlab.onos.cluster.ControllerNode; |
| import org.onlab.onos.core.ApplicationId; |
| import org.onlab.onos.core.CoreService; |
| import org.onlab.onos.event.AbstractEventAccumulator; |
| import org.onlab.onos.event.Event; |
| import org.onlab.onos.event.EventAccumulator; |
| import org.onlab.onos.mastership.MastershipAdminService; |
| import org.onlab.onos.mastership.MastershipEvent; |
| import org.onlab.onos.mastership.MastershipListener; |
| import org.onlab.onos.net.ConnectPoint; |
| import org.onlab.onos.net.Device; |
| import org.onlab.onos.net.Host; |
| import org.onlab.onos.net.HostId; |
| import org.onlab.onos.net.HostLocation; |
| import org.onlab.onos.net.Link; |
| import org.onlab.onos.net.device.DeviceEvent; |
| import org.onlab.onos.net.device.DeviceListener; |
| import org.onlab.onos.net.flow.DefaultTrafficSelector; |
| import org.onlab.onos.net.flow.DefaultTrafficTreatment; |
| import org.onlab.onos.net.flow.FlowRuleEvent; |
| import org.onlab.onos.net.flow.FlowRuleListener; |
| import org.onlab.onos.net.flow.TrafficSelector; |
| import org.onlab.onos.net.flow.TrafficTreatment; |
| import org.onlab.onos.net.host.HostEvent; |
| import org.onlab.onos.net.host.HostListener; |
| import org.onlab.onos.net.intent.HostToHostIntent; |
| import org.onlab.onos.net.intent.Intent; |
| import org.onlab.onos.net.intent.IntentEvent; |
| import org.onlab.onos.net.intent.IntentListener; |
| import org.onlab.onos.net.intent.MultiPointToSinglePointIntent; |
| import org.onlab.onos.net.link.LinkEvent; |
| import org.onlab.onos.net.link.LinkListener; |
| import org.onlab.osgi.ServiceDirectory; |
| import org.onlab.packet.Ethernet; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.Timer; |
| import java.util.TimerTask; |
| |
| import static com.google.common.base.Strings.isNullOrEmpty; |
| import static org.onlab.onos.cluster.ClusterEvent.Type.INSTANCE_ADDED; |
| import static org.onlab.onos.net.DeviceId.deviceId; |
| import static org.onlab.onos.net.HostId.hostId; |
| import static org.onlab.onos.net.device.DeviceEvent.Type.DEVICE_ADDED; |
| import static org.onlab.onos.net.device.DeviceEvent.Type.DEVICE_UPDATED; |
| import static org.onlab.onos.net.host.HostEvent.Type.HOST_ADDED; |
| import static org.onlab.onos.net.link.LinkEvent.Type.LINK_ADDED; |
| |
| /** |
| * Web socket capable of interacting with the GUI topology view. |
| */ |
| public class TopologyViewWebSocket |
| extends TopologyViewMessages |
| implements WebSocket.OnTextMessage, WebSocket.OnControl { |
| |
| private static final long MAX_AGE_MS = 15000; |
| |
| private static final byte PING = 0x9; |
| private static final byte PONG = 0xA; |
| private static final byte[] PING_DATA = new byte[]{(byte) 0xde, (byte) 0xad}; |
| |
| private static final String APP_ID = "org.onlab.onos.gui"; |
| |
| private static final long TRAFFIC_FREQUENCY = 2000; |
| private static final long SUMMARY_FREQUENCY = 30000; |
| |
| private static final Comparator<? super ControllerNode> NODE_COMPARATOR = |
| new Comparator<ControllerNode>() { |
| @Override |
| public int compare(ControllerNode o1, ControllerNode o2) { |
| return o1.id().toString().compareTo(o2.id().toString()); |
| } |
| }; |
| |
| |
| private final Timer timer = new Timer("topology-view"); |
| |
| private static final int MAX_EVENTS = 1000; |
| private static final int MAX_BATCH_MS = 5000; |
| private static final int MAX_IDLE_MS = 1000; |
| |
| private final ApplicationId appId; |
| |
| private Connection connection; |
| private FrameConnection control; |
| |
| private final ClusterEventListener clusterListener = new InternalClusterListener(); |
| private final MastershipListener mastershipListener = new InternalMastershipListener(); |
| private final DeviceListener deviceListener = new InternalDeviceListener(); |
| private final LinkListener linkListener = new InternalLinkListener(); |
| private final HostListener hostListener = new InternalHostListener(); |
| private final IntentListener intentListener = new InternalIntentListener(); |
| private final FlowRuleListener flowListener = new InternalFlowListener(); |
| |
| private final EventAccumulator eventAccummulator = new InternalEventAccummulator(); |
| |
| private TimerTask trafficTask; |
| private ObjectNode trafficEvent; |
| |
| private TimerTask summaryTask; |
| private ObjectNode summaryEvent; |
| |
| private long lastActive = System.currentTimeMillis(); |
| private boolean listenersRemoved = false; |
| |
| private TopologyViewIntentFilter intentFilter; |
| |
| // Current selection context |
| private Set<Host> selectedHosts; |
| private Set<Device> selectedDevices; |
| private List<Intent> selectedIntents; |
| private int currentIntentIndex = -1; |
| |
| /** |
| * Creates a new web-socket for serving data to GUI topology view. |
| * |
| * @param directory service directory |
| */ |
| public TopologyViewWebSocket(ServiceDirectory directory) { |
| super(directory); |
| intentFilter = new TopologyViewIntentFilter(intentService, deviceService, |
| hostService, linkService); |
| appId = directory.get(CoreService.class).registerApplication(APP_ID); |
| } |
| |
| /** |
| * Issues a close on the connection. |
| */ |
| synchronized void close() { |
| removeListeners(); |
| if (connection.isOpen()) { |
| connection.close(); |
| } |
| } |
| |
| /** |
| * Indicates if this connection is idle. |
| * |
| * @return true if idle or closed |
| */ |
| synchronized boolean isIdle() { |
| boolean idle = (System.currentTimeMillis() - lastActive) > MAX_AGE_MS; |
| if (idle || !connection.isOpen()) { |
| return true; |
| } |
| try { |
| control.sendControl(PING, PING_DATA, 0, PING_DATA.length); |
| } catch (IOException e) { |
| log.warn("Unable to send ping message due to: ", e); |
| } |
| return false; |
| } |
| |
| @Override |
| public void onOpen(Connection connection) { |
| log.info("GUI client connected"); |
| this.connection = connection; |
| this.control = (FrameConnection) connection; |
| addListeners(); |
| |
| sendAllInstances(null); |
| sendAllDevices(); |
| sendAllLinks(); |
| sendAllHosts(); |
| } |
| |
| @Override |
| public synchronized void onClose(int closeCode, String message) { |
| removeListeners(); |
| timer.cancel(); |
| log.info("GUI client disconnected"); |
| } |
| |
| @Override |
| public boolean onControl(byte controlCode, byte[] data, int offset, int length) { |
| lastActive = System.currentTimeMillis(); |
| return true; |
| } |
| |
| @Override |
| public void onMessage(String data) { |
| lastActive = System.currentTimeMillis(); |
| try { |
| processMessage((ObjectNode) mapper.reader().readTree(data)); |
| } catch (Exception e) { |
| log.warn("Unable to parse GUI request {} due to {}", data, e); |
| } |
| } |
| |
| // Processes the specified event. |
| private void processMessage(ObjectNode event) { |
| String type = string(event, "event", "unknown"); |
| if (type.equals("requestDetails")) { |
| requestDetails(event); |
| } else if (type.equals("updateMeta")) { |
| updateMetaUi(event); |
| |
| } else if (type.equals("addHostIntent")) { |
| createHostIntent(event); |
| } else if (type.equals("addMultiSourceIntent")) { |
| createMultiSourceIntent(event); |
| |
| } else if (type.equals("requestRelatedIntents")) { |
| requestRelatedIntents(event); |
| } else if (type.equals("requestNextRelatedIntent")) { |
| requestNextRelatedIntent(event); |
| } else if (type.equals("requestSelectedIntentTraffic")) { |
| requestSelectedIntentTraffic(event); |
| |
| } else if (type.equals("requestAllTraffic")) { |
| requestAllTraffic(event); |
| startTrafficMonitoring(event); |
| |
| } else if (type.equals("requestDeviceLinkFlows")) { |
| requestDeviceLinkFlows(event); |
| startTrafficMonitoring(event); |
| |
| } else if (type.equals("cancelTraffic")) { |
| cancelTraffic(event); |
| |
| } else if (type.equals("requestSummary")) { |
| requestSummary(event); |
| startSummaryMonitoring(event); |
| } else if (type.equals("cancelSummary")) { |
| stopSummaryMonitoring(); |
| |
| } else if (type.equals("equalizeMasters")) { |
| equalizeMasters(event); |
| } |
| } |
| |
| // Sends the specified data to the client. |
| private synchronized void sendMessage(ObjectNode data) { |
| try { |
| if (connection.isOpen()) { |
| connection.sendMessage(data.toString()); |
| } |
| } catch (IOException e) { |
| log.warn("Unable to send message {} to GUI due to {}", data, e); |
| } |
| } |
| |
| // Sends all controller nodes to the client as node-added messages. |
| private void sendAllInstances(String messageType) { |
| List<ControllerNode> nodes = new ArrayList<>(clusterService.getNodes()); |
| Collections.sort(nodes, NODE_COMPARATOR); |
| for (ControllerNode node : nodes) { |
| sendMessage(instanceMessage(new ClusterEvent(INSTANCE_ADDED, node), |
| messageType)); |
| } |
| } |
| |
| // Sends all devices to the client as device-added messages. |
| private void sendAllDevices() { |
| // Send optical first, others later for layered rendering |
| for (Device device : deviceService.getDevices()) { |
| if (device.type() == Device.Type.ROADM) { |
| sendMessage(deviceMessage(new DeviceEvent(DEVICE_ADDED, device))); |
| } |
| } |
| for (Device device : deviceService.getDevices()) { |
| if (device.type() != Device.Type.ROADM) { |
| sendMessage(deviceMessage(new DeviceEvent(DEVICE_ADDED, device))); |
| } |
| } |
| } |
| |
| // Sends all links to the client as link-added messages. |
| private void sendAllLinks() { |
| // Send optical first, others later for layered rendering |
| for (Link link : linkService.getLinks()) { |
| if (link.type() == Link.Type.OPTICAL) { |
| sendMessage(linkMessage(new LinkEvent(LINK_ADDED, link))); |
| } |
| } |
| for (Link link : linkService.getLinks()) { |
| if (link.type() != Link.Type.OPTICAL) { |
| sendMessage(linkMessage(new LinkEvent(LINK_ADDED, link))); |
| } |
| } |
| } |
| |
| // Sends all hosts to the client as host-added messages. |
| private void sendAllHosts() { |
| for (Host host : hostService.getHosts()) { |
| sendMessage(hostMessage(new HostEvent(HOST_ADDED, host))); |
| } |
| } |
| |
| // Sends back device or host details. |
| private void requestDetails(ObjectNode event) { |
| ObjectNode payload = payload(event); |
| String type = string(payload, "class", "unknown"); |
| long sid = number(event, "sid"); |
| |
| if (type.equals("device")) { |
| sendMessage(deviceDetails(deviceId(string(payload, "id")), sid)); |
| } else if (type.equals("host")) { |
| sendMessage(hostDetails(hostId(string(payload, "id")), sid)); |
| } |
| } |
| |
| |
| // Creates host-to-host intent. |
| private void createHostIntent(ObjectNode event) { |
| ObjectNode payload = payload(event); |
| long id = number(event, "sid"); |
| // TODO: add protection against device ids and non-existent hosts. |
| HostId one = hostId(string(payload, "one")); |
| HostId two = hostId(string(payload, "two")); |
| |
| HostToHostIntent intent = |
| new HostToHostIntent(appId, one, two, |
| DefaultTrafficSelector.builder().build(), |
| DefaultTrafficTreatment.builder().build()); |
| |
| intentService.submit(intent); |
| startMonitoringIntent(event, intent); |
| } |
| |
| // Creates multi-source-to-single-dest intent. |
| private void createMultiSourceIntent(ObjectNode event) { |
| ObjectNode payload = payload(event); |
| long id = number(event, "sid"); |
| // TODO: add protection against device ids and non-existent hosts. |
| Set<HostId> src = getHostIds((ArrayNode) payload.path("src")); |
| HostId dst = hostId(string(payload, "dst")); |
| Host dstHost = hostService.getHost(dst); |
| |
| Set<ConnectPoint> ingressPoints = getHostLocations(src); |
| |
| // FIXME: clearly, this is not enough |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchEthDst(dstHost.mac()).build(); |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder().build(); |
| |
| MultiPointToSinglePointIntent intent = |
| new MultiPointToSinglePointIntent(appId, selector, treatment, |
| ingressPoints, dstHost.location()); |
| |
| intentService.submit(intent); |
| startMonitoringIntent(event, intent); |
| } |
| |
| |
| private synchronized void startMonitoringIntent(ObjectNode event, Intent intent) { |
| selectedHosts = new HashSet<>(); |
| selectedDevices = new HashSet<>(); |
| selectedIntents = new ArrayList<>(); |
| selectedIntents.add(intent); |
| currentIntentIndex = -1; |
| requestNextRelatedIntent(event); |
| requestSelectedIntentTraffic(event); |
| } |
| |
| |
| |
| private Set<ConnectPoint> getHostLocations(Set<HostId> hostIds) { |
| Set<ConnectPoint> points = new HashSet<>(); |
| for (HostId hostId : hostIds) { |
| points.add(getHostLocation(hostId)); |
| } |
| return points; |
| } |
| |
| private HostLocation getHostLocation(HostId hostId) { |
| return hostService.getHost(hostId).location(); |
| } |
| |
| // Produces a list of host ids from the specified JSON array. |
| private Set<HostId> getHostIds(ArrayNode ids) { |
| Set<HostId> hostIds = new HashSet<>(); |
| for (JsonNode id : ids) { |
| hostIds.add(hostId(id.asText())); |
| } |
| return hostIds; |
| } |
| |
| |
| private synchronized long startTrafficMonitoring(ObjectNode event) { |
| stopTrafficMonitoring(); |
| trafficEvent = event; |
| trafficTask = new TrafficMonitor(); |
| timer.schedule(trafficTask, TRAFFIC_FREQUENCY, TRAFFIC_FREQUENCY); |
| return number(event, "sid"); |
| } |
| |
| private synchronized void stopTrafficMonitoring() { |
| if (trafficTask != null) { |
| trafficTask.cancel(); |
| trafficTask = null; |
| trafficEvent = null; |
| } |
| } |
| |
| // Subscribes for host traffic messages. |
| private synchronized void requestAllTraffic(ObjectNode event) { |
| long sid = startTrafficMonitoring(event); |
| sendMessage(trafficSummaryMessage(sid)); |
| } |
| |
| private void requestDeviceLinkFlows(ObjectNode event) { |
| ObjectNode payload = payload(event); |
| long sid = startTrafficMonitoring(event); |
| |
| // Get the set of selected hosts and their intents. |
| ArrayNode ids = (ArrayNode) payload.path("ids"); |
| Set<Host> hosts = new HashSet<>(); |
| Set<Device> devices = getDevices(ids); |
| |
| // If there is a hover node, include it in the hosts and find intents. |
| String hover = string(payload, "hover"); |
| if (!isNullOrEmpty(hover)) { |
| addHover(hosts, devices, hover); |
| } |
| sendMessage(flowSummaryMessage(sid, devices)); |
| } |
| |
| |
| // Requests related intents message. |
| private synchronized void requestRelatedIntents(ObjectNode event) { |
| ObjectNode payload = payload(event); |
| if (!payload.has("ids")) { |
| return; |
| } |
| |
| long sid = number(event, "sid"); |
| |
| // Cancel any other traffic monitoring mode. |
| stopTrafficMonitoring(); |
| |
| String hover = string(payload, "hover"); |
| if (haveSelectedIntents()) { |
| // Get the set of selected hosts and their intents. |
| ArrayNode ids = (ArrayNode) payload.path("ids"); |
| selectedHosts = getHosts(ids); |
| selectedDevices = getDevices(ids); |
| selectedIntents = intentFilter.findPathIntents(selectedHosts, selectedDevices, |
| intentService.getIntents()); |
| currentIntentIndex = -1; |
| |
| // Send a message to highlight all links of all monitored intents. |
| sendMessage(trafficMessage(sid, new TrafficClass("primary", selectedIntents))); |
| } |
| |
| if (!isNullOrEmpty(hover)) { |
| // If there is a hover node, include it in the selection and find intents. |
| processExtendedSelection(sid, hover); |
| } |
| } |
| |
| private boolean haveSelectedIntents() { |
| return selectedIntents != null && !selectedIntents.isEmpty(); |
| } |
| |
| private void processExtendedSelection(long sid, String hover) { |
| Set<Host> hoverSelHosts = new HashSet<>(selectedHosts); |
| Set<Device> hoverSelDevices = new HashSet<>(selectedDevices); |
| addHover(hoverSelHosts, hoverSelDevices, hover); |
| |
| List<Intent> primary = |
| intentFilter.findPathIntents(hoverSelHosts, hoverSelDevices, |
| selectedIntents); |
| Set<Intent> secondary = new HashSet<>(selectedIntents); |
| secondary.removeAll(primary); |
| |
| // Send a message to highlight all links of all monitored intents. |
| sendMessage(trafficMessage(sid, new TrafficClass("primary", primary), |
| new TrafficClass("secondary", secondary))); |
| } |
| |
| // Requests next of the related intents. |
| private void requestNextRelatedIntent(ObjectNode event) { |
| if (haveSelectedIntents()) { |
| currentIntentIndex = (currentIntentIndex + 1) % selectedIntents.size(); |
| Intent selectedIntent = selectedIntents.get(currentIntentIndex); |
| log.info("Requested next intent {}", selectedIntent.id()); |
| |
| Set<Intent> primary = new HashSet<>(); |
| primary.add(selectedIntent); |
| |
| Set<Intent> secondary = new HashSet<>(selectedIntents); |
| secondary.remove(selectedIntent); |
| |
| // Send a message to highlight all links of the selected intent. |
| sendMessage(trafficMessage(number(event, "sid"), |
| new TrafficClass("primary", primary), |
| new TrafficClass("secondary", secondary))); |
| } |
| } |
| |
| // Requests monitoring of traffic for the selected intent. |
| private void requestSelectedIntentTraffic(ObjectNode event) { |
| if (haveSelectedIntents()) { |
| Intent selectedIntent = selectedIntents.get(currentIntentIndex); |
| log.info("Requested traffic for selected {}", selectedIntent.id()); |
| |
| Set<Intent> primary = new HashSet<>(); |
| primary.add(selectedIntent); |
| |
| // Send a message to highlight all links of the selected intent. |
| sendMessage(trafficMessage(number(event, "sid"), |
| new TrafficClass("primary", primary, true))); |
| } |
| } |
| |
| // Cancels sending traffic messages. |
| private void cancelTraffic(ObjectNode event) { |
| selectedIntents = null; |
| sendMessage(trafficMessage(number(event, "sid"))); |
| stopTrafficMonitoring(); |
| } |
| |
| |
| private synchronized long startSummaryMonitoring(ObjectNode event) { |
| stopSummaryMonitoring(); |
| summaryEvent = event; |
| summaryTask = new SummaryMonitor(); |
| timer.schedule(summaryTask, SUMMARY_FREQUENCY, SUMMARY_FREQUENCY); |
| return number(event, "sid"); |
| } |
| |
| private synchronized void stopSummaryMonitoring() { |
| if (summaryEvent != null) { |
| summaryTask.cancel(); |
| summaryTask = null; |
| summaryEvent = null; |
| } |
| } |
| |
| // Subscribes for summary messages. |
| private synchronized void requestSummary(ObjectNode event) { |
| sendMessage(summmaryMessage(number(event, "sid"))); |
| } |
| |
| |
| // Forces mastership role rebalancing. |
| private void equalizeMasters(ObjectNode event) { |
| directory.get(MastershipAdminService.class).balanceRoles(); |
| } |
| |
| |
| // Adds all internal listeners. |
| private void addListeners() { |
| clusterService.addListener(clusterListener); |
| mastershipService.addListener(mastershipListener); |
| deviceService.addListener(deviceListener); |
| linkService.addListener(linkListener); |
| hostService.addListener(hostListener); |
| intentService.addListener(intentListener); |
| flowService.addListener(flowListener); |
| } |
| |
| // Removes all internal listeners. |
| private synchronized void removeListeners() { |
| if (!listenersRemoved) { |
| listenersRemoved = true; |
| clusterService.removeListener(clusterListener); |
| mastershipService.removeListener(mastershipListener); |
| deviceService.removeListener(deviceListener); |
| linkService.removeListener(linkListener); |
| hostService.removeListener(hostListener); |
| intentService.removeListener(intentListener); |
| flowService.removeListener(flowListener); |
| } |
| } |
| |
| // Cluster event listener. |
| private class InternalClusterListener implements ClusterEventListener { |
| @Override |
| public void event(ClusterEvent event) { |
| sendMessage(instanceMessage(event, null)); |
| } |
| } |
| |
| // Mastership change listener |
| private class InternalMastershipListener implements MastershipListener { |
| @Override |
| public void event(MastershipEvent event) { |
| sendAllInstances("updateInstance"); |
| Device device = deviceService.getDevice(event.subject()); |
| sendMessage(deviceMessage(new DeviceEvent(DEVICE_UPDATED, device))); |
| } |
| } |
| |
| // Device event listener. |
| private class InternalDeviceListener implements DeviceListener { |
| @Override |
| public void event(DeviceEvent event) { |
| sendMessage(deviceMessage(event)); |
| eventAccummulator.add(event); |
| } |
| } |
| |
| // Link event listener. |
| private class InternalLinkListener implements LinkListener { |
| @Override |
| public void event(LinkEvent event) { |
| sendMessage(linkMessage(event)); |
| eventAccummulator.add(event); |
| } |
| } |
| |
| // Host event listener. |
| private class InternalHostListener implements HostListener { |
| @Override |
| public void event(HostEvent event) { |
| sendMessage(hostMessage(event)); |
| eventAccummulator.add(event); |
| } |
| } |
| |
| // Intent event listener. |
| private class InternalIntentListener implements IntentListener { |
| @Override |
| public void event(IntentEvent event) { |
| if (trafficEvent != null) { |
| requestSelectedIntentTraffic(trafficEvent); |
| } |
| eventAccummulator.add(event); |
| } |
| } |
| |
| // Intent event listener. |
| private class InternalFlowListener implements FlowRuleListener { |
| @Override |
| public void event(FlowRuleEvent event) { |
| eventAccummulator.add(event); |
| } |
| } |
| |
| // Periodic update of the traffic information |
| private class TrafficMonitor extends TimerTask { |
| @Override |
| public void run() { |
| try { |
| if (trafficEvent != null) { |
| String type = string(trafficEvent, "event", "unknown"); |
| if (type.equals("requestAllTraffic")) { |
| requestAllTraffic(trafficEvent); |
| } else if (type.equals("requestDeviceLinkFlows")) { |
| requestDeviceLinkFlows(trafficEvent); |
| } else if (type.equals("requestSelectedIntentTraffic")) { |
| requestSelectedIntentTraffic(trafficEvent); |
| } |
| } |
| } catch (Exception e) { |
| log.warn("Unable to handle traffic request due to {}", e.getMessage()); |
| log.warn("Boom!", e); |
| } |
| } |
| } |
| |
| // Periodic update of the summary information |
| private class SummaryMonitor extends TimerTask { |
| @Override |
| public void run() { |
| try { |
| if (summaryEvent != null) { |
| requestSummary(summaryEvent); |
| } |
| } catch (Exception e) { |
| log.warn("Unable to handle summary request due to {}", e.getMessage()); |
| } |
| } |
| } |
| |
| // Accumulates events to drive methodic update of the summary pane. |
| private class InternalEventAccummulator extends AbstractEventAccumulator { |
| protected InternalEventAccummulator() { |
| super(new Timer("topo-summary"), MAX_EVENTS, MAX_BATCH_MS, MAX_IDLE_MS); |
| } |
| |
| @Override |
| public void processEvents(List<Event> events) { |
| try { |
| if (summaryEvent != null) { |
| sendMessage(summmaryMessage(0)); |
| } |
| } catch (Exception e) { |
| log.warn("Unable to handle summary request due to {}", e.getMessage()); |
| } |
| |
| } |
| } |
| } |
| |