restconf/sal-rest-connector/src/main/java/org/opendaylight/restconf/restful/services/impl/RestconfStreamsSubscriptionServiceImpl.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.restful.services.impl;
   9
  10 import java.net.URI;
  11 import java.util.Map;
  12 import javax.ws.rs.core.Response;
  13 import javax.ws.rs.core.Response.Status;
  14 import javax.ws.rs.core.UriBuilder;
  15 import javax.ws.rs.core.UriInfo;
  16 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  18 import org.opendaylight.netconf.sal.restconf.impl.RestconfDocumentedException;
  19 import org.opendaylight.netconf.sal.restconf.impl.RestconfError.ErrorTag;
  20 import org.opendaylight.netconf.sal.restconf.impl.RestconfError.ErrorType;
  21 import org.opendaylight.netconf.sal.streams.listeners.ListenerAdapter;
  22 import org.opendaylight.netconf.sal.streams.listeners.Notificator;
  23 import org.opendaylight.restconf.handlers.DOMDataBrokerHandler;
  24 import org.opendaylight.restconf.restful.services.api.RestconfStreamsSubscriptionService;
  25 import org.opendaylight.restconf.restful.utils.RestconfStreamsConstants;
  26 import org.opendaylight.restconf.restful.utils.SubscribeToStreamUtil;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 /**
  31  * Implementation of {@link RestconfStreamsSubscriptionService}
  32  *
  33  */
  34 public class RestconfStreamsSubscriptionServiceImpl implements RestconfStreamsSubscriptionService {
  35
  36     private static final Logger LOG = LoggerFactory.getLogger(RestconfStreamsSubscriptionServiceImpl.class);
  37
  38     private final DOMDataBrokerHandler domDataBrokerHandler;
  39
  40     public RestconfStreamsSubscriptionServiceImpl(final DOMDataBrokerHandler domDataBrokerHandler) {
  41         this.domDataBrokerHandler = domDataBrokerHandler;
  42     }
  43
  44     @Override
  45     public Response subscribeToStream(final String identifier, final UriInfo uriInfo) {
  46         final Map<String, String> mapOfValues = SubscribeToStreamUtil.mapValuesFromUri(identifier);
  47
  48         final LogicalDatastoreType ds = SubscribeToStreamUtil.parseURIEnum(LogicalDatastoreType.class,
  49                 mapOfValues.get(RestconfStreamsConstants.DATASTORE_PARAM_NAME));
  50         if (ds == null) {
  51             final String msg = "Stream name doesn't contains datastore value (pattern /datastore=)";
  52             LOG.debug(msg);
  53             throw new RestconfDocumentedException(msg, ErrorType.APPLICATION, ErrorTag.MISSING_ATTRIBUTE);
  54         }
  55
  56         final DataChangeScope scope = SubscribeToStreamUtil.parseURIEnum(DataChangeScope.class,
  57                 mapOfValues.get(RestconfStreamsConstants.SCOPE_PARAM_NAME));
  58         if (scope == null) {
  59             final String msg = "Stream name doesn't contains datastore value (pattern /scope=)";
  60             LOG.warn(msg);
  61             throw new RestconfDocumentedException(msg, ErrorType.APPLICATION, ErrorTag.MISSING_ATTRIBUTE);
  62         }
  63
  64         final String streamName = Notificator.createStreamNameFromUri(identifier);
  65
  66         final ListenerAdapter listener = Notificator.getListenerFor(streamName);
  67         SubscribeToStreamUtil.registration(ds, scope, listener, this.domDataBrokerHandler.get());
  68
  69         final int port = SubscribeToStreamUtil.prepareNotificationPort();
  70
  71         final UriBuilder uriBuilder = uriInfo.getAbsolutePathBuilder();
  72         final UriBuilder uriToWebSocketServer = uriBuilder.port(port).scheme(RestconfStreamsConstants.SCHEMA_SUBSCIBRE_URI);
  73         final URI uri = uriToWebSocketServer.replacePath(streamName).build();
  74
  75         return Response.status(Status.OK).location(uri).build();
  76     }
  77 }