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.DOMDataBrokerHandler;
  25 import org.opendaylight.restconf.handlers.DOMMountPointServiceHandler;
  26 import org.opendaylight.restconf.handlers.SchemaContextHandler;
  27 import org.opendaylight.restconf.handlers.TransactionChainHandler;
  28 import org.opendaylight.restconf.rest.services.impl.Draft11ServicesWrapperImpl;
  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 draft11.
  36  *
  37  */
  38 public class RestConnectorProvider implements Provider, RestConnector, AutoCloseable {
  39
  40     private static final Logger LOG = LoggerFactory.getLogger(RestConnectorProvider.class);
  41
  42     private final TransactionChainListener transactionListener = 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             chain.close();
  48             resetTransactionChainForAdapaters(chain);
  49             throw new RestconfDocumentedException("TransactionChain(" + chain + ") not committed correctly", cause);
  50         }
  51
  52         @Override
  53         public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
  54             LOG.trace("TransactionChain({}) {} SUCCESSFUL", chain);
  55         }
  56     };
  57
  58     private ListenerRegistration<SchemaContextListener> listenerRegistration;
  59     private DOMDataBroker dataBroker;
  60     private DOMTransactionChain transactionChain;
  61
  62     @Override
  63     public void onSessionInitiated(final ProviderSession session) {
  64         final SchemaService schemaService = Preconditions.checkNotNull(session.getService(SchemaService.class));
  65
  66         final Draft11ServicesWrapperImpl wrapperServices = Draft11ServicesWrapperImpl.getInstance();
  67
  68         final SchemaContextHandler schemaCtxHandler = new SchemaContextHandler();
  69         this.listenerRegistration = schemaService.registerSchemaContextListener(schemaCtxHandler);
  70
  71         final DOMMountPointServiceHandler domMountPointServiceHandler = new DOMMountPointServiceHandler(
  72                 session.getService(DOMMountPointService.class));
  73
  74         this.dataBroker = session.getService(DOMDataBroker.class);
  75         this.transactionChain = this.dataBroker.createTransactionChain(this.transactionListener);
  76         final TransactionChainHandler transactionChainHandler = new TransactionChainHandler(this.transactionChain);
  77
  78         final DOMDataBrokerHandler brokerHandler = new DOMDataBrokerHandler(this.dataBroker);
  79
  80         wrapperServices.setHandlers(schemaCtxHandler, domMountPointServiceHandler);
  81     }
  82
  83     /**
  84      * After {@link TransactionChain} failed, this is creating new transaction
  85      * with listener.
  86      *
  87      * @param chain
  88      *            - old {@link TransactionChain}
  89      */
  90     private void resetTransactionChainForAdapaters(final TransactionChain<?, ?> chain) {
  91         LOG.trace("Resetting TransactionChain({}) to {}", chain, this.transactionChain);
  92         this.transactionChain = Preconditions.checkNotNull(this.dataBroker)
  93                 .createTransactionChain(this.transactionListener);
  94     }
  95
  96     @Override
  97     public Collection<ProviderFunctionality> getProviderFunctionality() {
  98         return Collections.emptySet();
  99     }
 100
 101     @Override
 102     public void close() throws Exception {
 103         if (this.listenerRegistration != null) {
 104             this.listenerRegistration.close();
 105         }
 106         if (this.transactionChain != null) {
 107             this.transactionChain.close();
 108         }
 109     }
 110 }