Orion Context Broker &Association

Question

我一直在尝试运行一个能够关联Orion的设置。

我一直在遵循关于FIWARE wiki的“用户和程序员指南”，其中的功能解释如下：

首先注册"Room1“和"Room2”实体，如下所述：operation

这如预期的那样起作用。然后，我在这里遵循关联的步骤：Guide#Associations

所有注册都按预期进行，但是，当我尝试"discoverContextAvailability“时，我得到了一个"NGSI 404”，它看起来如下：

请求：

<?xml version="1.0"?>
<discoverContextAvailabilityRequest>
  <entityIdList>
    <entityId type="Room" isPattern="false">
      <id>Room2</id>
    </entityId>
  </entityIdList>
  <attributeList>
    <attribute>temperature</attribute>
  </attributeList>
  <restriction>
    <scope>
      <operationScope>
        <scopeType>IncludeAssociations</scopeType>
        <scopeValue>SOURCES</scopeValue>
      </operationScope>
    </scope>
  </restriction>
</discoverContextAvailabilityRequest>

答复：

<discoverContextAvailabilityResponse>
  <errorCode>
    <code>404</code>
    <reasonPhrase>No context element found</reasonPhrase>
    <details>Could not query association with combination of entity/attribute</details>
  </errorCode>
</discoverContextAvailabilityResponse>

作为附带说明，我想提到的是，我试图将猎户座配置管理器与NEC IoT代理集成，并且当IoT代理向猎户座发送discoverContextAvailability时，它还包括告诉猎户座“包含关联”的限制，这将导致下面描述的相同错误(即使在本例中没有注册关联)。

我真的需要帮助。

更新1回显‘db.registrations.find()_ mongo的结果：

{ "_id" : ObjectId("54d4acdfa85d6301365b7240"), "expiration" : NumberLong(1423310431), "contextRegistration" : [        {       "entities" : [  {       "id" : "Filtered000D6F000277BCC0",      "type" : "FilteredSmartPlug" } ],       "attrs" : [  {       "name" : "currentPower",        "type" : "float",       "isDomain" : "false" } ],       "providingApplication" : "http://localhost/EspR4FastData/" } ] }
{ "_id" : ObjectId("54e1c2e7a85d6301365b7314"), "expiration" : NumberLong(1424513639), "contextRegistration" : [        {       "entities" : [  {       "id" : "30DE8600002001C4",      "type" : "SmartPlug" } ],       "attrs" : [     {   "name" : "name",         "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "manufacturer",        "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "model",       "type" : "xs:string",   "isDomain" : "false" },      {       "name" : "protocol",    "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "currentPower",        "type" : "xs:float",    "isDomain" : "false" },         {       "name" : "currentState",     "type" : "xs:integer",  "isDomain" : "false" } ],       "providingApplication" : "http://10.42.82.127:8080/zpa/ngsi" } ] }
{ "_id" : ObjectId("54e1c2f9a85d6301365b7315"), "expiration" : NumberLong(1424513657), "contextRegistration" : [        {       "entities" : [  {       "id" : "30DE8600002001C4",      "type" : "SmartPlug" } ],       "attrs" : [     {   "name" : "name",         "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "manufacturer",        "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "model",       "type" : "xs:string",   "isDomain" : "false" },      {       "name" : "protocol",    "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "currentPower",        "type" : "xs:float",    "isDomain" : "false" },         {       "name" : "currentState",     "type" : "xs:integer",  "isDomain" : "false" } ],       "providingApplication" : "http://10.42.82.127:8080/zpa/ngsi" } ] }
{ "_id" : ObjectId("54e1c3aaa85d6301365b7316"), "expiration" : NumberLong(1424513834), "contextRegistration" : [        {       "entities" : [  {       "id" : "30DE8600002001C4",      "type" : "SmartPlug" } ],       "attrs" : [     {   "name" : "name",         "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "manufacturer",        "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "model",       "type" : "xs:string",   "isDomain" : "false" },      {       "name" : "protocol",    "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "currentPower",        "type" : "xs:float",    "isDomain" : "false" },         {       "name" : "currentState",     "type" : "xs:integer",  "isDomain" : "false" } ],       "providingApplication" : "http://10.42.82.127:8080/zpa/ngsi" } ] }
{ "_id" : ObjectId("54e1c416a85d6301365b7317"), "expiration" : NumberLong(1424513942), "contextRegistration" : [        {       "entities" : [  {       "id" : "30DE8600002001C5",      "type" : "SmartPlug" } ],       "attrs" : [     {   "name" : "name",         "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "manufacturer",        "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "model",       "type" : "xs:string",   "isDomain" : "false" },      {       "name" : "protocol",    "type" : "xs:string",   "isDomain" : "false" },         {       "name" : "currentPower",        "type" : "xs:float",    "isDomain" : "false" },         {       "name" : "currentState",     "type" : "xs:integer",  "isDomain" : "false" } ],       "providingApplication" : "http://10.42.82.127:8080/zpa/ngsi" } ] }
{ "_id" : ObjectId("54e1ce41a85d6301365b7318"), "expiration" : NumberLong(1424084605), "contextRegistration" : [        {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1d2eda85d6301365b7319"), "expiration" : NumberLong(1424085801), "contextRegistration" : [        {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1d333a85d6301365b731a"), "expiration" : NumberLong(1424085871), "contextRegistration" : [        {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1d334a85d6301365b731b"), "expiration" : NumberLong(1424085872), "contextRegistration" : [        {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1d56ea85d6301365b731c"), "expiration" : NumberLong(1424086442), "contextRegistration" : [        {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1d922a85d6301365b731d"), "expiration" : NumberLong(1426679330), "contextRegistration" : [        {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1d92da85d6301365b731e"), "expiration" : NumberLong(1426679341), "contextRegistration" : [        {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1d97ba85d6301365b731f"), "expiration" : NumberLong(1426679419), "contextRegistration" : [        {       "entities" : [  {       "id" : "Room1",         "type" : "Room" },      {       "id" : "Room2",         "type" : "Room" } ],         "attrs" : [     {       "name" : "temperature",         "type" : "float",       "isDomain" : "false" },         {       "name" : "pressure",    "type" : "integer",     "isDomain" : "false" } ],       "providingApplication" : "http://mysensors.com/Rooms" } ] }
{ "_id" : ObjectId("54e1d9afa85d6301365b7320"), "expiration" : NumberLong(1426679471), "contextRegistration" : [        {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1dd0fa85d6369180b7c49"), "expiration" : NumberLong(1426680335), "servicePath" : "/", "contextRegistration" : [   {       "entities" : [  {       "id" : "Room1",         "type" : "Room" },      {       "id" : "Room2",      "type" : "Room" } ],    "attrs" : [     {       "name" : "temperature",         "type" : "float",       "isDomain" : "false" },         {       "name" : "pressure",    "type" : "integer",     "isDomain" : "false" } ],       "providingApplication" : "http://mysensors.com/Rooms" } ] }
{ "_id" : ObjectId("54e1dd47a85d6369180b7c4a"), "expiration" : NumberLong(1426680391), "servicePath" : "/", "contextRegistration" : [   {       "entities" : [  {       "id" : "Room1",         "type" : "Room" },      {       "id" : "Room2",      "type" : "Room" } ],    "attrs" : [     {       "name" : "temperature",         "type" : "float",       "isDomain" : "false" },         {       "name" : "pressure",    "type" : "integer",     "isDomain" : "false" } ],       "providingApplication" : "http://mysensors.com/Rooms" } ] }
{ "_id" : ObjectId("54e1ddc1a85d6369180b7c4d"), "expiration" : NumberLong(1426680513), "servicePath" : "/", "contextRegistration" : [   {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1ddc2a85d6369180b7c4e"), "expiration" : NumberLong(1426680514), "servicePath" : "/", "contextRegistration" : [   {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1ddc2a85d6369180b7c4f"), "expiration" : NumberLong(1426680514), "servicePath" : "/", "contextRegistration" : [   {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }
{ "_id" : ObjectId("54e1ddc3a85d6369180b7c50"), "expiration" : NumberLong(1426680515), "servicePath" : "/", "contextRegistration" : [   {       "entities" : [ ],       "attrs" : [ ],  "providingApplication" : "http://www.fi-ware.eu/NGSI/association" } ] }

更新2

删除数据库后，指南中描述的过程现在开始工作。当一个实体有一个位置时，我会得到回复。另一方面，如果实体没有关联，查询仍然返回错误“无法查询与实体/属性组合的关联”。

然而。我最初的问题是，NEC IoT Broker向Configuration提出了这个请求(始终包括对关联的限制)，这意味着每当我查询没有关联的IoT代理上的数据时，它都会失败。这行为真的正确吗？

Answer 1

这个问题似乎与猎户座数据库中的重叠登记有关。在清理DB并重复测试之后，它工作了(根据用户的报告)。