restconf/restconf-nb-bierman02/src/main/java/org/opendaylight/restconf/RestConnectorProvider.java

   1 /*
   2  * Copyright (c) 2016 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.restconf;
  10
  11 import com.google.common.base.Preconditions;
  12 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  13 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  14 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  15 import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
  16 import org.opendaylight.controller.md.sal.dom.api.DOMMountPointService;
  17 import org.opendaylight.controller.md.sal.dom.api.DOMNotificationService;
  18 import org.opendaylight.controller.md.sal.dom.api.DOMRpcService;
  19 import org.opendaylight.controller.sal.core.api.model.SchemaService;
  20 import org.opendaylight.netconf.sal.rest.api.RestConnector;
  21 import org.opendaylight.netconf.sal.restconf.impl.RestconfDocumentedException;
  22 import org.opendaylight.restconf.common.wrapper.services.ServicesWrapperImpl;
  23 import org.opendaylight.restconf.handlers.DOMDataBrokerHandler;
  24 import org.opendaylight.restconf.handlers.DOMMountPointServiceHandler;
  25 import org.opendaylight.restconf.handlers.NotificationServiceHandler;
  26 import org.opendaylight.restconf.handlers.RpcServiceHandler;
  27 import org.opendaylight.restconf.handlers.SchemaContextHandler;
  28 import org.opendaylight.restconf.handlers.TransactionChainHandler;
  29 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  30 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 /**
  35  * Provider for restconf draft18.
  36  *
  37  */
  38 public class RestConnectorProvider implements RestConnector, AutoCloseable {
  39
  40     private static final Logger LOG = LoggerFactory.getLogger(RestConnectorProvider.class);
  41
  42     public static final TransactionChainListener TRANSACTION_CHAIN_LISTENER = new TransactionChainListener() {
  43         @Override
  44         public void onTransactionChainFailed(final TransactionChain<?, ?> chain,
  45                 final AsyncTransaction<?, ?> transaction, final Throwable cause) {
  46             LOG.warn("TransactionChain({}) {} FAILED!", chain, transaction.getIdentifier(), cause);
  47             resetTransactionChainForAdapaters(chain);
  48             throw new RestconfDocumentedException("TransactionChain(" + chain + ") not committed correctly", cause);
  49         }
  50
  51         @Override
  52         public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
  53             LOG.trace("TransactionChain({}) {} SUCCESSFUL", chain);
  54         }
  55     };
  56
  57     private static TransactionChainHandler transactionChainHandler;
  58     private static DOMDataBroker dataBroker;
  59     private static DOMMountPointServiceHandler mountPointServiceHandler;
  60
  61     private final SchemaService schemaService;
  62     private final DOMRpcService rpcService;
  63     private final DOMNotificationService notificationService;
  64     private final DOMMountPointService mountPointService;
  65     private ListenerRegistration<SchemaContextListener> listenerRegistration;
  66
  67     private SchemaContextHandler schemaCtxHandler;
  68
  69     public RestConnectorProvider(DOMDataBroker domDataBroker, SchemaService schemaService, DOMRpcService rpcService,
  70             DOMNotificationService notificationService, DOMMountPointService mountPointService) {
  71         this.schemaService = Preconditions.checkNotNull(schemaService);
  72         this.rpcService = Preconditions.checkNotNull(rpcService);
  73         this.notificationService = Preconditions.checkNotNull(notificationService);
  74         this.mountPointService = Preconditions.checkNotNull(mountPointService);
  75
  76         RestConnectorProvider.dataBroker = Preconditions.checkNotNull(domDataBroker);
  77     }
  78
  79     public void start() {
  80         final ServicesWrapperImpl wrapperServices = ServicesWrapperImpl.getInstance();
  81
  82         mountPointServiceHandler = new DOMMountPointServiceHandler(mountPointService);
  83
  84         final DOMDataBrokerHandler brokerHandler = new DOMDataBrokerHandler(dataBroker);
  85
  86         RestConnectorProvider.transactionChainHandler = new TransactionChainHandler(dataBroker
  87                 .createTransactionChain(RestConnectorProvider.TRANSACTION_CHAIN_LISTENER));
  88
  89         this.schemaCtxHandler = new SchemaContextHandler(transactionChainHandler);
  90         this.listenerRegistration = schemaService.registerSchemaContextListener(this.schemaCtxHandler);
  91
  92         final RpcServiceHandler rpcServiceHandler = new RpcServiceHandler(rpcService);
  93
  94         final NotificationServiceHandler notificationServiceHandler =
  95                 new NotificationServiceHandler(notificationService);
  96
  97         wrapperServices.setHandlers(this.schemaCtxHandler, RestConnectorProvider.mountPointServiceHandler,
  98                 RestConnectorProvider.transactionChainHandler, brokerHandler, rpcServiceHandler,
  99                 notificationServiceHandler);
 100     }
 101
 102     public DOMMountPointServiceHandler getMountPointServiceHandler() {
 103         return mountPointServiceHandler;
 104     }
 105
 106     /**
 107      * After {@link TransactionChain} failed, this updates {@link TransactionChainHandler} with new transaction chain.
 108      *
 109      * @param chain
 110      *             old {@link TransactionChain}
 111      */
 112     public static void resetTransactionChainForAdapaters(final TransactionChain<?, ?> chain) {
 113         LOG.trace("Resetting TransactionChain({})", chain);
 114         chain.close();
 115         RestConnectorProvider.transactionChainHandler.update(
 116                 Preconditions.checkNotNull(dataBroker).createTransactionChain(
 117                         RestConnectorProvider.TRANSACTION_CHAIN_LISTENER)
 118         );
 119     }
 120
 121     /**
 122      * Get current {@link DOMMountPointService} from {@link DOMMountPointServiceHandler}.
 123      * @return {@link DOMMountPointService}
 124      */
 125     public static DOMMountPointService getMountPointService() {
 126         return mountPointServiceHandler.get();
 127     }
 128
 129     @Override
 130     public void close() throws Exception {
 131         // close registration
 132         if (this.listenerRegistration != null) {
 133             this.listenerRegistration.close();
 134         }
 135
 136         // close transaction chain
 137         if (transactionChainHandler != null && transactionChainHandler.get() != null) {
 138             transactionChainHandler.get().close();
 139         }
 140
 141         transactionChainHandler = null;
 142         mountPointServiceHandler = null;
 143         dataBroker = null;
 144     }
 145 }