restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/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.nb.rfc8040;
  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.restconf.common.errors.RestconfDocumentedException;
  21 import org.opendaylight.restconf.nb.rfc8040.handlers.DOMDataBrokerHandler;
  22 import org.opendaylight.restconf.nb.rfc8040.handlers.DOMMountPointServiceHandler;
  23 import org.opendaylight.restconf.nb.rfc8040.handlers.NotificationServiceHandler;
  24 import org.opendaylight.restconf.nb.rfc8040.handlers.RpcServiceHandler;
  25 import org.opendaylight.restconf.nb.rfc8040.handlers.SchemaContextHandler;
  26 import org.opendaylight.restconf.nb.rfc8040.handlers.TransactionChainHandler;
  27 import org.opendaylight.restconf.nb.rfc8040.services.wrapper.ServiceWrapper;
  28 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  29 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 /**
  34  * Provider for restconf draft18.
  35  *
  36  */
  37 public class RestConnectorProvider<T extends ServiceWrapper> implements RestconfConnector, AutoCloseable {
  38
  39     private static final Logger LOG = LoggerFactory.getLogger(RestConnectorProvider.class);
  40
  41     public static final TransactionChainListener TRANSACTION_CHAIN_LISTENER = new TransactionChainListener() {
  42         @Override
  43         public void onTransactionChainFailed(final TransactionChain<?, ?> chain,
  44                 final AsyncTransaction<?, ?> transaction, final Throwable cause) {
  45             LOG.warn("TransactionChain({}) {} FAILED!", chain, transaction.getIdentifier(), cause);
  46             resetTransactionChainForAdapaters(chain);
  47             throw new RestconfDocumentedException("TransactionChain(" + chain + ") not committed correctly", cause);
  48         }
  49
  50         @Override
  51         public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
  52             LOG.trace("TransactionChain({}) {} SUCCESSFUL", chain);
  53         }
  54     };
  55
  56     private static TransactionChainHandler transactionChainHandler;
  57     private static DOMDataBroker dataBroker;
  58     private static DOMMountPointServiceHandler mountPointServiceHandler;
  59
  60     private final SchemaService schemaService;
  61     private final DOMRpcService rpcService;
  62     private final DOMNotificationService notificationService;
  63     private final DOMMountPointService mountPointService;
  64     private final T wrapperServices;
  65
  66     private ListenerRegistration<SchemaContextListener> listenerRegistration;
  67     private SchemaContextHandler schemaCtxHandler;
  68
  69     public RestConnectorProvider(final DOMDataBroker domDataBroker,
  70             final SchemaService schemaService, final DOMRpcService rpcService,
  71             final DOMNotificationService notificationService, final DOMMountPointService mountPointService,
  72             final T wrapperServices) {
  73         this.wrapperServices = Preconditions.checkNotNull(wrapperServices);
  74         this.schemaService = Preconditions.checkNotNull(schemaService);
  75         this.rpcService = Preconditions.checkNotNull(rpcService);
  76         this.notificationService = Preconditions.checkNotNull(notificationService);
  77         this.mountPointService = Preconditions.checkNotNull(mountPointService);
  78
  79         RestConnectorProvider.dataBroker = Preconditions.checkNotNull(domDataBroker);
  80     }
  81
  82     public void start() {
  83         mountPointServiceHandler = new DOMMountPointServiceHandler(mountPointService);
  84
  85         final DOMDataBrokerHandler brokerHandler = new DOMDataBrokerHandler(dataBroker);
  86
  87         RestConnectorProvider.transactionChainHandler = new TransactionChainHandler(dataBroker
  88                 .createTransactionChain(RestConnectorProvider.TRANSACTION_CHAIN_LISTENER));
  89
  90         this.schemaCtxHandler = new SchemaContextHandler(transactionChainHandler);
  91         this.listenerRegistration = schemaService.registerSchemaContextListener(this.schemaCtxHandler);
  92
  93         final RpcServiceHandler rpcServiceHandler = new RpcServiceHandler(rpcService);
  94
  95         final NotificationServiceHandler notificationServiceHandler =
  96                 new NotificationServiceHandler(notificationService);
  97
  98         wrapperServices.setHandlers(this.schemaCtxHandler, RestConnectorProvider.mountPointServiceHandler,
  99                 RestConnectorProvider.transactionChainHandler, brokerHandler, rpcServiceHandler,
 100                 notificationServiceHandler);
 101     }
 102
 103     public DOMMountPointServiceHandler getMountPointServiceHandler() {
 104         return mountPointServiceHandler;
 105     }
 106
 107     /**
 108      * After {@link TransactionChain} failed, this updates {@link TransactionChainHandler} with new transaction chain.
 109      *
 110      * @param chain
 111      *             old {@link TransactionChain}
 112      */
 113     public static void resetTransactionChainForAdapaters(final TransactionChain<?, ?> chain) {
 114         LOG.trace("Resetting TransactionChain({})", chain);
 115         chain.close();
 116         RestConnectorProvider.transactionChainHandler.update(
 117                 Preconditions.checkNotNull(dataBroker).createTransactionChain(
 118                         RestConnectorProvider.TRANSACTION_CHAIN_LISTENER)
 119         );
 120     }
 121
 122     /**
 123      * Get current {@link DOMMountPointService} from {@link DOMMountPointServiceHandler}.
 124      * @return {@link DOMMountPointService}
 125      */
 126     public static DOMMountPointService getMountPointService() {
 127         return mountPointServiceHandler.get();
 128     }
 129
 130     @Override
 131     public void close() throws Exception {
 132         // close registration
 133         if (this.listenerRegistration != null) {
 134             this.listenerRegistration.close();
 135         }
 136
 137         // close transaction chain
 138         if (transactionChainHandler != null && transactionChainHandler.get() != null) {
 139             transactionChainHandler.get().close();
 140         }
 141
 142         transactionChainHandler = null;
 143         mountPointServiceHandler = null;
 144         dataBroker = null;
 145     }
 146 }