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