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.DOMTransactionChain;
  19 import org.opendaylight.controller.sal.core.api.Broker.ProviderSession;
  20 import org.opendaylight.controller.sal.core.api.Provider;
  21 import org.opendaylight.controller.sal.core.api.model.SchemaService;
  22 import org.opendaylight.netconf.sal.rest.api.RestConnector;
  23 import org.opendaylight.netconf.sal.restconf.impl.RestconfDocumentedException;
  24 import org.opendaylight.restconf.handlers.DOMMountPointServiceHandler;
  25 import org.opendaylight.restconf.handlers.SchemaContextHandler;
  26 import org.opendaylight.restconf.handlers.TransactionChainHandler;
  27 import org.opendaylight.restconf.rest.services.impl.Draft11ServicesWrapperImpl;
  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 draft11.
  35  *
  36  */
  37 public class RestConnectorProvider implements Provider, RestConnector, AutoCloseable {
  38
  39     private static final Logger LOG = LoggerFactory.getLogger(RestConnectorProvider.class);
  40
  41     private final TransactionChainListener transactionListener = 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             chain.close();
  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 ListenerRegistration<SchemaContextListener> listenerRegistration;
  58     private DOMDataBroker dataBroker;
  59     private DOMTransactionChain transactionChain;
  60
  61     @Override
  62     public void onSessionInitiated(final ProviderSession session) {
  63         final SchemaService schemaService = Preconditions.checkNotNull(session.getService(SchemaService.class));
  64
  65         final Draft11ServicesWrapperImpl wrapperServices = Draft11ServicesWrapperImpl.getInstance();
  66
  67         final SchemaContextHandler schemaCtxHandler = new SchemaContextHandler();
  68         this.listenerRegistration = schemaService.registerSchemaContextListener(schemaCtxHandler);
  69
  70         final DOMMountPointServiceHandler domMountPointServiceHandler = new DOMMountPointServiceHandler(
  71                 session.getService(DOMMountPointService.class));
  72
  73         this.dataBroker = session.getService(DOMDataBroker.class);
  74         this.transactionChain = this.dataBroker.createTransactionChain(this.transactionListener);
  75         final TransactionChainHandler transactionChainHandler = new TransactionChainHandler(this.transactionChain);
  76
  77         wrapperServices.setHandlers(schemaCtxHandler, domMountPointServiceHandler);
  78     }
  79
  80     /**
  81      * After {@link TransactionChain} failed, this is creating new transaction
  82      * with listener.
  83      *
  84      * @param chain
  85      *            - old {@link TransactionChain}
  86      */
  87     private void resetTransactionChainForAdapaters(final TransactionChain<?, ?> chain) {
  88         LOG.trace("Resetting TransactionChain({}) to {}", chain, this.transactionChain);
  89         this.transactionChain = Preconditions.checkNotNull(this.dataBroker)
  90                 .createTransactionChain(this.transactionListener);
  91     }
  92
  93     @Override
  94     public Collection<ProviderFunctionality> getProviderFunctionality() {
  95         return Collections.emptySet();
  96     }
  97
  98     @Override
  99     public void close() throws Exception {
 100         if (this.listenerRegistration != null) {
 101             this.listenerRegistration.close();
 102         }
 103         if (this.transactionChain != null) {
 104             this.transactionChain.close();
 105         }
 106     }
 107 }