renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/OFOverlayRenderer.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   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
   9 package org.opendaylight.groupbasedpolicy.renderer.ofoverlay;
  10
  11 import java.util.concurrent.Executors;
  12 import java.util.concurrent.ScheduledExecutorService;
  13
  14 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  15 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  16 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  17 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  18 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  19 import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
  20 import org.opendaylight.groupbasedpolicy.resolver.PolicyResolver;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.ofoverlay.rev140528.OfOverlayConfig;
  22 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  23 import org.opendaylight.yangtools.yang.binding.DataObject;
  24 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 import com.google.common.base.Optional;
  29 import com.google.common.util.concurrent.FutureCallback;
  30 import com.google.common.util.concurrent.Futures;
  31 import com.google.common.util.concurrent.ListenableFuture;
  32
  33 /**
  34  * Renderer that uses OpenFlow and OVSDB to implement an overlay network
  35  * using Open vSwitch.
  36  * @author readams
  37  */
  38 public class OFOverlayRenderer implements AutoCloseable, DataChangeListener {
  39     private static final Logger LOG =
  40             LoggerFactory.getLogger(OFOverlayRenderer.class);
  41
  42     private final DataBroker dataBroker;
  43     private final PolicyResolver policyResolver;
  44     private final SwitchManager switchManager;
  45     private final EndpointManager endpointManager;
  46     private final PolicyManager policyManager;
  47
  48     private final ScheduledExecutorService executor;
  49
  50     private static final InstanceIdentifier<OfOverlayConfig> configIid =
  51             InstanceIdentifier.builder(OfOverlayConfig.class).build();
  52
  53     private OfOverlayConfig config;
  54     ListenerRegistration<DataChangeListener> configReg;
  55
  56     public OFOverlayRenderer(DataBroker dataProvider,
  57                              RpcProviderRegistry rpcRegistry) {
  58         super();
  59         this.dataBroker = dataProvider;
  60
  61         int numCPU = Runtime.getRuntime().availableProcessors();
  62         //TODO: Consider moving to groupbasedpolicy-ofoverlay-config so as to be user configurable in distribution.
  63         executor = Executors.newScheduledThreadPool(numCPU * 2);
  64
  65         switchManager = new SwitchManager(dataProvider, executor);
  66         endpointManager = new EndpointManager(dataProvider, rpcRegistry,
  67                                               executor, switchManager);
  68         policyResolver = new PolicyResolver(dataProvider, executor);
  69
  70         policyManager = new PolicyManager(dataProvider,
  71                                           policyResolver,
  72                                           switchManager,
  73                                           endpointManager,
  74                                           rpcRegistry,
  75                                           executor);
  76
  77         configReg =
  78                 dataProvider.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION,
  79                                                         configIid,
  80                                                         this,
  81                                                         DataChangeScope.SUBTREE);
  82         readConfig();
  83         LOG.info("Initialized OFOverlay renderer");
  84
  85     }
  86
  87     // *************
  88     // AutoCloseable
  89     // *************
  90
  91     @Override
  92     public void close() throws Exception {
  93         executor.shutdownNow();
  94         if (configReg != null) configReg.close();
  95         if (policyResolver != null) policyResolver.close();
  96         if (switchManager != null) switchManager.close();
  97         if (endpointManager != null) endpointManager.close();
  98     }
  99
 100     // ******************
 101     // DataChangeListener
 102     // ******************
 103
 104     @Override
 105     public void onDataChanged(AsyncDataChangeEvent<InstanceIdentifier<?>,
 106                                                    DataObject> change) {
 107         readConfig();
 108     }
 109
 110     // **************
 111     // Implementation
 112     // **************
 113
 114     private void readConfig() {
 115         ListenableFuture<Optional<OfOverlayConfig>> dao =
 116                 dataBroker.newReadOnlyTransaction()
 117                     .read(LogicalDatastoreType.CONFIGURATION, configIid);
 118         Futures.addCallback(dao, new FutureCallback<Optional<OfOverlayConfig>>() {
 119             @Override
 120             public void onSuccess(final Optional<OfOverlayConfig> result) {
 121                 if (!result.isPresent()) return;
 122                 if (result.get() instanceof OfOverlayConfig) {
 123                     config = (OfOverlayConfig)result.get();
 124                     applyConfig();
 125                 }
 126             }
 127
 128             @Override
 129             public void onFailure(Throwable t) {
 130                 LOG.error("Failed to read configuration", t);
 131             }
 132         }, executor);
 133     }
 134
 135     private void applyConfig() {
 136         switchManager.setEncapsulationFormat(config.getEncapsulationFormat());
 137         endpointManager.setLearningMode(config.getLearningMode());
 138         policyManager.setLearningMode(config.getLearningMode());
 139     }
 140 }