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.Action;
  22 import org.opendaylight.ovsdb.openstack.netvirt.api.NodeCacheListener;
  23 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  24 import org.osgi.framework.ServiceReference;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 public class PipelineOrchestratorImpl implements NodeCacheListener, PipelineOrchestrator {
  29
  30     private static final Logger logger = LoggerFactory.getLogger(PipelineOrchestratorImpl.class);
  31     private List<Service> staticPipeline = Lists.newArrayList(
  32             Service.CLASSIFIER,
  33             Service.ARP_RESPONDER,
  34             Service.INBOUND_NAT,
  35             Service.EGRESS_ACL,
  36             Service.LOAD_BALANCER,
  37             Service.ROUTING,
  38             Service.L3_FORWARDING,
  39             Service.L2_REWRITE,
  40             Service.INGRESS_ACL,
  41             Service.OUTBOUND_NAT,
  42             Service.L2_FORWARDING
  43     );
  44     Map<Service, AbstractServiceInstance> serviceRegistry = Maps.newConcurrentMap();
  45     private volatile BlockingQueue<Node> queue;
  46     private ExecutorService eventHandler;
  47     public PipelineOrchestratorImpl() {
  48     }
  49
  50     public void registerService(final ServiceReference ref, AbstractServiceInstance serviceInstance){
  51         Service service = (Service)ref.getProperty(AbstractServiceInstance.SERVICE_PROPERTY);
  52         logger.info("registerService {} - {}", serviceInstance, service);
  53         serviceRegistry.put(service, serviceInstance);
  54     }
  55
  56     public void unregisterService(final ServiceReference ref) {
  57         serviceRegistry.remove(ref.getProperty(AbstractServiceInstance.SERVICE_PROPERTY));
  58     }
  59     @Override
  60     public Service getNextServiceInPipeline(Service service) {
  61         int index = staticPipeline.indexOf(service);
  62         if (index >= staticPipeline.size() - 1) return null;
  63         return staticPipeline.get(index + 1);
  64     }
  65
  66     @Override
  67     public AbstractServiceInstance getServiceInstance(Service service) {
  68         if (service == null) return null;
  69         return serviceRegistry.get(service);
  70     }
  71
  72     public void init() {
  73         eventHandler = Executors.newSingleThreadExecutor();
  74         this.queue = new LinkedBlockingQueue<Node>();
  75         logger.info(">>>>> init PipelineOrchestratorImpl");
  76     }
  77
  78     public void start() {
  79         eventHandler.submit(new Runnable()  {
  80             @Override
  81             public void run() {
  82                 try {
  83                     while (true) {
  84                         Node node = queue.take();
  85                         /*
  86                          * Since we are hooking on OpendaylightInventoryListener and as observed in
  87                          * Bug 1997 multiple Threads trying to write to a same table at the same time
  88                          * causes programming issues. Hence delaying the programming by a second to
  89                          * avoid the clash. This hack/workaround should be removed once Bug 1997 is resolved.
  90                          */
  91                         logger.info(">>>>> dequeue: {}", node);
  92                         Thread.sleep(1000);
  93                         for (Service service : staticPipeline) {
  94                             AbstractServiceInstance serviceInstance = getServiceInstance(service);
  95                             logger.info("pipeline: {} - {}", service, serviceInstance);
  96                             if (serviceInstance != null) {
  97                                 serviceInstance.programDefaultPipelineRule(node);
  98                             }
  99                         }
 100                     }
 101                 } catch (Exception e) {
 102                     logger.warn("Processing interrupted, terminating ", e);
 103                 }
 104
 105                 while (!queue.isEmpty()) {
 106                     queue.poll();
 107                 }
 108                 queue = null;
 109             }
 110         });
 111     }
 112
 113     public void stop() {
 114         queue.clear();
 115         eventHandler.shutdownNow();
 116     }
 117
 118     @Override
 119     public void enqueue(Node node) {
 120         logger.info(">>>>> enqueue: {}", node);
 121         try {
 122             queue.put(node);
 123         } catch (InterruptedException e) {
 124             logger.warn("Failed to enqueue operation {}", node, e);
 125         }
 126     }
 127
 128     @Override
 129     public void notifyNode(Node node, Action action) {
 130         enqueue(node);
 131     }
 132 }