openstack/net-virt-providers/src/main/java/org/opendaylight/ovsdb/openstack/netvirt/providers/openflow13/PipelineOrchestratorImpl.java

   1 /*
   2  * Copyright (C) 2014 Red Hat, Inc.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Authors : Dave Tucker, Madhu Venugopal
   9  */
  10
  11 package org.opendaylight.ovsdb.openstack.netvirt.providers.openflow13;
  12
  13 import com.google.common.collect.Lists;
  14 import com.google.common.collect.Maps;
  15 import java.util.List;
  16 import java.util.Map;
  17 import java.util.concurrent.BlockingQueue;
  18 import java.util.concurrent.ExecutorService;
  19 import java.util.concurrent.Executors;
  20 import java.util.concurrent.LinkedBlockingQueue;
  21 import org.opendaylight.ovsdb.openstack.netvirt.api.Southbound;
  22 import org.opendaylight.ovsdb.openstack.netvirt.api.Action;
  23 import org.opendaylight.ovsdb.openstack.netvirt.api.NodeCacheListener;
  24 import org.opendaylight.ovsdb.openstack.netvirt.api.NodeCacheManager;
  25 import org.opendaylight.ovsdb.openstack.netvirt.providers.ConfigInterface;
  26 import org.opendaylight.ovsdb.utils.servicehelper.ServiceHelper;
  27 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  28 import org.osgi.framework.BundleContext;
  29 import org.osgi.framework.ServiceReference;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 public class PipelineOrchestratorImpl implements ConfigInterface, NodeCacheListener, PipelineOrchestrator {
  34     private static final Logger LOG = LoggerFactory.getLogger(PipelineOrchestratorImpl.class);
  35     private List<Service> staticPipeline = Lists.newArrayList(
  36             Service.CLASSIFIER,
  37             Service.ARP_RESPONDER,
  38             Service.INBOUND_NAT,
  39             Service.EGRESS_ACL,
  40             Service.LOAD_BALANCER,
  41             Service.ROUTING,
  42             Service.L3_FORWARDING,
  43             Service.L2_REWRITE,
  44             Service.INGRESS_ACL,
  45             Service.OUTBOUND_NAT,
  46             Service.L2_FORWARDING
  47     );
  48     Map<Service, AbstractServiceInstance> serviceRegistry = Maps.newConcurrentMap();
  49     private volatile BlockingQueue<Node> queue;
  50     private ExecutorService eventHandler;
  51     private Southbound southbound;
  52
  53     public PipelineOrchestratorImpl() {
  54         eventHandler = Executors.newSingleThreadExecutor();
  55         this.queue = new LinkedBlockingQueue<>();
  56         LOG.info("PipelineOrchestratorImpl constructor");
  57         start();
  58     }
  59
  60     public void registerService(final ServiceReference ref, AbstractServiceInstance serviceInstance){
  61         Service service = (Service)ref.getProperty(AbstractServiceInstance.SERVICE_PROPERTY);
  62         LOG.info("registerService {} - {}", serviceInstance, service);
  63         serviceRegistry.put(service, serviceInstance);
  64     }
  65
  66     public void unregisterService(final ServiceReference ref) {
  67         serviceRegistry.remove(ref.getProperty(AbstractServiceInstance.SERVICE_PROPERTY));
  68     }
  69     @Override
  70     public Service getNextServiceInPipeline(Service service) {
  71         int index = staticPipeline.indexOf(service);
  72         if (index >= staticPipeline.size() - 1) {
  73             return null;
  74         }
  75         return staticPipeline.get(index + 1);
  76     }
  77
  78     @Override
  79     public AbstractServiceInstance getServiceInstance(Service service) {
  80         if (service == null) {
  81             return null;
  82         }
  83         return serviceRegistry.get(service);
  84     }
  85
  86     public void start() {
  87         eventHandler.submit(new Runnable()  {
  88             @Override
  89             public void run() {
  90                 try {
  91                     while (true) {
  92                         Node node = queue.take();
  93                         /*
  94                          * Since we are hooking on OpendaylightInventoryListener and as observed in
  95                          * Bug 1997 multiple Threads trying to write to a same table at the same time
  96                          * causes programming issues. Hence delaying the programming by a second to
  97                          * avoid the clash. This hack/workaround should be removed once Bug 1997 is resolved.
  98                          */
  99                         LOG.info(">>>>> dequeue: {}", node);
 100                         Thread.sleep(1000);
 101                         for (Service service : staticPipeline) {
 102                             AbstractServiceInstance serviceInstance = getServiceInstance(service);
 103                             //LOG.info("pipeline: {} - {}", service, serviceInstance);
 104                             if (serviceInstance != null) {
 105                                 if (southbound.getBridge(node) != null) {
 106                                     serviceInstance.programDefaultPipelineRule(node);
 107                                 }
 108                             }
 109                         }
 110                     }
 111                 } catch (Exception e) {
 112                     LOG.warn("Processing interrupted, terminating ", e);
 113                 }
 114
 115                 while (!queue.isEmpty()) {
 116                     queue.poll();
 117                 }
 118                 queue = null;
 119             }
 120         });
 121     }
 122
 123     public void stop() {
 124         queue.clear();
 125         eventHandler.shutdownNow();
 126     }
 127
 128     @Override
 129     public void enqueue(Node node) {
 130         LOG.info(">>>>> enqueue: {}", node);
 131         try {
 132             queue.put(node);
 133         } catch (InterruptedException e) {
 134             LOG.warn("Failed to enqueue operation {}", node, e);
 135         }
 136     }
 137
 138     @Override
 139     public void notifyNode(Node node, Action action) {
 140         if (action == Action.ADD) {
 141             enqueue(node);
 142         } else {
 143             LOG.info("update ignored: {}", node);
 144         }
 145     }
 146
 147     @Override
 148     public void setDependencies(BundleContext bundleContext, ServiceReference serviceReference) {
 149         NodeCacheManager nodeCacheManager =
 150                 (NodeCacheManager) ServiceHelper.getGlobalInstance(NodeCacheManager.class, this);
 151         nodeCacheManager.cacheListenerAdded(
 152                 bundleContext.getServiceReference(PipelineOrchestrator.class.getName()), this);
 153         southbound =
 154                 (Southbound) ServiceHelper.getGlobalInstance(Southbound.class, this);
 155     }
 156
 157     @Override
 158     public void setDependencies(Object impl) {}
 159 }