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 package org.opendaylight.restconf;
   9
  10 import com.google.common.base.Preconditions;
  11 import java.util.Collection;
  12 import java.util.Collections;
  13 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  14 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  15 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  16 import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
  17 import org.opendaylight.controller.md.sal.dom.api.DOMMountPointService;
  18 import org.opendaylight.controller.md.sal.dom.api.DOMRpcService;
  19 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  20 import org.opendaylight.controller.sal.core.api.Broker.ProviderSession;
  21 import org.opendaylight.controller.sal.core.api.Provider;
  22 import org.opendaylight.controller.sal.core.api.model.SchemaService;
  23 import org.opendaylight.netconf.sal.rest.api.RestConnector;
  24 import org.opendaylight.netconf.sal.restconf.impl.RestconfDocumentedException;
  25 import org.opendaylight.restconf.common.wrapper.services.Draft15ServicesWrapperImpl;
  26 import org.opendaylight.restconf.handlers.DOMDataBrokerHandler;
  27 import org.opendaylight.restconf.handlers.DOMMountPointServiceHandler;
  28 import org.opendaylight.restconf.handlers.RpcServiceHandler;
  29 import org.opendaylight.restconf.handlers.SchemaContextHandler;
  30 import org.opendaylight.restconf.handlers.TransactionChainHandler;
  31 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  32 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  33 import org.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 /**
  37  * Provider for restconf draft15.
  38  *
  39  */
  40 public class RestConnectorProvider implements Provider, RestConnector, AutoCloseable {
  41
  42     private static final Logger LOG = LoggerFactory.getLogger(RestConnectorProvider.class);
  43
  44     public static final TransactionChainListener transactionListener = new TransactionChainListener() {
  45         @Override
  46         public void onTransactionChainFailed(final TransactionChain<?, ?> chain,
  47                 final AsyncTransaction<?, ?> transaction, final Throwable cause) {
  48             LOG.warn("TransactionChain({}) {} FAILED!", chain, transaction.getIdentifier(), cause);
  49             resetTransactionChainForAdapaters(chain);
  50             throw new RestconfDocumentedException("TransactionChain(" + chain + ") not committed correctly", cause);
  51         }
  52
  53         @Override
  54         public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
  55             LOG.trace("TransactionChain({}) {} SUCCESSFUL", chain);
  56         }
  57     };
  58
  59     private ListenerRegistration<SchemaContextListener> listenerRegistration;
  60     private static DOMDataBroker dataBroker;
  61     private static DOMTransactionChain transactionChain;
  62
  63     @Override
  64     public void onSessionInitiated(final ProviderSession session) {
  65         final SchemaService schemaService = Preconditions.checkNotNull(session.getService(SchemaService.class));
  66
  67         final Draft15ServicesWrapperImpl wrapperServices = Draft15ServicesWrapperImpl.getInstance();
  68
  69         final SchemaContextHandler schemaCtxHandler = new SchemaContextHandler();
  70         this.listenerRegistration = schemaService.registerSchemaContextListener(schemaCtxHandler);
  71
  72         final DOMMountPointServiceHandler domMountPointServiceHandler = new DOMMountPointServiceHandler(
  73                 session.getService(DOMMountPointService.class));
  74
  75         dataBroker = session.getService(DOMDataBroker.class);
  76         final DOMDataBrokerHandler brokerHandler = new DOMDataBrokerHandler(dataBroker);
  77
  78         transactionChain = dataBroker.createTransactionChain(transactionListener);
  79         final TransactionChainHandler transactionChainHandler = new TransactionChainHandler(transactionChain);
  80
  81         final DOMRpcService rpcService = session.getService(DOMRpcService.class);
  82         final RpcServiceHandler rpcServiceHandler = new RpcServiceHandler(rpcService);
  83
  84         wrapperServices.setHandlers(schemaCtxHandler, domMountPointServiceHandler, transactionChainHandler,
  85                 brokerHandler, rpcServiceHandler);
  86     }
  87
  88     /**
  89      * After {@link TransactionChain} failed, this is creating new transaction
  90      * with listener.
  91      *
  92      * @param chain
  93      *            - old {@link TransactionChain}
  94      */
  95     public static void resetTransactionChainForAdapaters(final TransactionChain<?, ?> chain) {
  96         LOG.trace("Resetting TransactionChain({}) to {}", chain, transactionChain);
  97         chain.close();
  98         transactionChain = Preconditions.checkNotNull(dataBroker).createTransactionChain(transactionListener);
  99     }
 100
 101     @Override
 102     public Collection<ProviderFunctionality> getProviderFunctionality() {
 103         return Collections.emptySet();
 104     }
 105
 106     @Override
 107     public void close() throws Exception {
 108         if (this.listenerRegistration != null) {
 109             this.listenerRegistration.close();
 110         }
 111         if (transactionChain != null) {
 112             transactionChain.close();
 113         }
 114     }
 115 }