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.renderer.ofoverlay.node.SwitchManager;
  21 import org.opendaylight.groupbasedpolicy.resolver.PolicyResolver;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.ofoverlay.rev140528.OfOverlayConfig;
  23 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  24 import org.opendaylight.yangtools.yang.binding.DataObject;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 import com.google.common.base.Optional;
  30 import com.google.common.util.concurrent.FutureCallback;
  31 import com.google.common.util.concurrent.Futures;
  32 import com.google.common.util.concurrent.ListenableFuture;
  33
  34 /**
  35  * Renderer that uses OpenFlow and OVSDB to implement an overlay network
  36  * using Open vSwitch.
  37  * @author readams
  38  */
  39 public class OFOverlayRenderer implements AutoCloseable, DataChangeListener {
  40     private static final Logger LOG =
  41             LoggerFactory.getLogger(OFOverlayRenderer.class);
  42
  43     private final DataBroker dataBroker;
  44     private final PolicyResolver policyResolver;
  45     private final SwitchManager switchManager;
  46     private final EndpointManager endpointManager;
  47     private final PolicyManager policyManager;
  48
  49     private final ScheduledExecutorService executor;
  50
  51     private static final InstanceIdentifier<OfOverlayConfig> configIid =
  52             InstanceIdentifier.builder(OfOverlayConfig.class).build();
  53
  54     private OfOverlayConfig config;
  55     ListenerRegistration<DataChangeListener> configReg;
  56
  57     public OFOverlayRenderer(DataBroker dataProvider,
  58                              RpcProviderRegistry rpcRegistry) {
  59         super();
  60         this.dataBroker = dataProvider;
  61
  62         int numCPU = Runtime.getRuntime().availableProcessors();
  63         //TODO: Consider moving to groupbasedpolicy-ofoverlay-config so as to be user configurable in distribution.
  64         executor = Executors.newScheduledThreadPool(numCPU * 2);
  65
  66         switchManager = new SwitchManager(dataProvider);
  67         endpointManager = new EndpointManager(dataProvider, rpcRegistry,
  68                                               executor, switchManager);
  69         policyResolver = new PolicyResolver(dataProvider, executor);
  70
  71         policyManager = new PolicyManager(dataProvider,
  72                                           policyResolver,
  73                                           switchManager,
  74                                           endpointManager,
  75                                           rpcRegistry,
  76                                           executor);
  77
  78         configReg =
  79                 dataProvider.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION,
  80                                                         configIid,
  81                                                         this,
  82                                                         DataChangeScope.SUBTREE);
  83         readConfig();
  84         LOG.info("Initialized OFOverlay renderer");
  85
  86     }
  87
  88     // *************
  89     // AutoCloseable
  90     // *************
  91
  92     @Override
  93     public void close() throws Exception {
  94         executor.shutdownNow();
  95         if (configReg != null) configReg.close();
  96         if (policyResolver != null) policyResolver.close();
  97         if (switchManager != null) switchManager.close();
  98         if (endpointManager != null) endpointManager.close();
  99     }
 100
 101     // ******************
 102     // DataChangeListener
 103     // ******************
 104
 105     @Override
 106     public void onDataChanged(AsyncDataChangeEvent<InstanceIdentifier<?>,
 107                                                    DataObject> change) {
 108         readConfig();
 109     }
 110
 111     // **************
 112     // Implementation
 113     // **************
 114
 115     private void readConfig() {
 116         ListenableFuture<Optional<OfOverlayConfig>> dao =
 117                 dataBroker.newReadOnlyTransaction()
 118                     .read(LogicalDatastoreType.CONFIGURATION, configIid);
 119         Futures.addCallback(dao, new FutureCallback<Optional<OfOverlayConfig>>() {
 120             @Override
 121             public void onSuccess(final Optional<OfOverlayConfig> result) {
 122                 if (!result.isPresent()) return;
 123                 if (result.get() instanceof OfOverlayConfig) {
 124                     config = result.get();
 125                     applyConfig();
 126                 }
 127             }
 128
 129             @Override
 130             public void onFailure(Throwable t) {
 131                 LOG.error("Failed to read configuration", t);
 132             }
 133         }, executor);
 134     }
 135
 136     private void applyConfig() {
 137         switchManager.setEncapsulationFormat(config.getEncapsulationFormat());
 138         endpointManager.setLearningMode(config.getLearningMode());
 139         policyManager.setLearningMode(config.getLearningMode());
 140     }
 141 }