I have consumed WCF service in biztalk through "Add generated items". There is a method in WCF which takes an integer parameter. In orchestration I want to pass that method a default value or say I want to hard code input value. How I can achieve this. I have googled this question but didn't get any adequate result.
What I have done is declared an integer variable assign it a value, then I assigned that variable to a message of Integer type.
Now how I can assign this message to WebService Request type message?
or how I can transform integer type message to WebService Request type message?
There are a bunch of ways to do this:
If you are mapping the request from another message, you can hard code it in the map - click on the field in the RHS of the Map Editor and set the hard coded value in the Value in the Property box
After creating a (dummy) request message, you can set the value using xpath() in an expression message assignment shape
xpath(myRequestMessage, "//*[local-name()='NameOfFieldHere']") = 3; // Or set to it your variable
If the field is distinguished in your schema, you can use the distinguished field instead of xpath, viz in an expression message assignment shape:
myRequestMessage.NameOfFieldHere = 3;
(And note if its a multipart message, then it will be myRequestMessage.Part.NameOfFieldHere OFC)
One disclaimer: I've assumed the WCF service request message is trivial, i.e. just a single integer field. If your message is large, using //local-name() ... isn't recommended, since
There may be more than one node with with the name NameOfFieldHere
The XSL parser used by BizTalk is slow and resource intensive when evaluating large xml documents with //
Biztalk Scheduler Adapter is really helpful in this case. It generates desired XML on predefined scheduled set by the user. So fill up your XML with hard coded values and receive them through this adapter.
Related
I consider myself that 0 is not a good thing to do when returning information from an API
e.g.
{
userId: int|null
}
I have a colleague that insists in that userId should be 0 or -1, but that forces a system to know that the 0 means "not set", instead of null which is universally known as not set.
The same happens with string params, like logoUrl. However, in this case I think it is acceptable to have an empty string instead of null if the variable is not set or was unset.
Is there bibliography, standards, etc, that I can refer to?
I'm not aware of any standard around that, but the way I take those kind of decisions is by thinking about the way consumer services would read this response, the goal being to provide a very smooth and clean consuming workflow. This exercise can even be transformed into a documentation for your API consumers.
In your case, instead of returning a null/0 field, I would simply remove that field altogether when it's empty and let the consumers explicitly mark that field as optional in the model they use to deserialize this response.
In that way, they'll explicitly have to deal with those optional fields, than relying on the API to always provide a value for them.
I need to be able to create an event processing rule that when you add a new device, you take a string value from one fragment (e.g.: c8y_Hardware.imei) and use that string to populate another fragment (e.g: c8y_Mobile.imei). So the new device would then have the same value in both c8y_Hardware.imei and c8y_Mobile.imei.
We have attempted setting up the appropriate CEP rules, but they are not working (they do compile and save).
insert into UpdateManagedObject
select
m.id as id,
{
"c8y_Mobile.imei", getString(m,"c8y_Hardware.imei")
} as fragments
from
ManagedObjectCreated as m
where
getString(m,"c8y_Hardware.imei") != "";
Any guidance on where we are messing up our syntax would be greatly appreciated.
It should be: m.managedObject.id as id.
Usually you would also get an error on compile but it can be that the streams also have an id so that it technically works in CEP. You should be able to check if it triggers on the debug stream and see the id that has been set.
Same applies for all other Cumulocity streams. The streams itself e.g. ManagedObjectCreated or AlarmUpdated etc. are not the objects directly. They have always a property like in this case managedObject or for AlarmUpdated it is alarm. This property is the actual payload.
The helper methods like getString are written in a way that you can pass either the payload or the full stream object so there it does not matter.
I have a wcf service having the following operation:
public NewPCNResponse CreateNewPcnExtended(NewPcnExtendedData newPcnExtendedData, string chargeBand, string deviceId, decimal? usageCharge, string plateType)
Note the camel cased parameter chargeBand. The problem is with all the camel cased parameters but I am taking this one for demonstration.
I am using SoapUi to test the calls and the following is the relevant part of the SOAP request:
The element is camel cased and even though it is nullable, it comes thorough as an empty string as shown in the following screenshot:
this fails the validation which I have down the line.
However if the argument is pascal cased, it comes through fine
The easier solution for me to change the casing but I want to know the reason behind this odd behaviour and if I want to keep the argument camel cased what option do I have.
I send the following message with content type application/json:
However whene i get messages from the same RabbitMQ Web console, it shows the payload as String.
What am I doing wrong? Or am I fundamentally misunderstanding and the Payload is always of type String?
From the official docs:
AMQP messages also have a payload (the data that they carry), which AMQP brokers treat as an opaque byte array. The broker will not inspect or modify the payload. It is possible for messages to contain only attributes and no payload. It is common to use serialisation formats like JSON, Thrift, Protocol Buffers and MessagePack to serialize structured data in order to publish it as the message payload. AMQP peers typically use the "content-type" and "content-encoding" fields to communicate this information, but this is by convention only.
So basically, RabbitMQ has no knowledge on JSON, messages all are just byte arrays to it
From NodeJS Context:
If we want to send JSON object as message, we may get the following error:
The first argument must be of type string or an instance of Buffer,
ArrayBuffer, or Array or an Array-like Object. Received an instance of
Object
So, we can convert the JSON payload as string and parse it in the worker. We stringify the JSON object before sending the data the Queue-
let payloadAsString = JSON.stringify(payload);
And from worker's end, we can then JSON.parse
let payload = JSON.parse(msg.content.toString());
//then access the object as we normally do, i.e. :
let id = payload.id;
For anyone using .Net to send objects via RabbitMQ.
You have to serialise your JSON object to byte array, send via RabbitMQ then de-serialise after receiving. You can do this like this:
Install the Newtonsoft JSON library
using Newtonsoft.Json;
Create a model for your JSON object message (in this case AccountMessage)
Serialise your object into byte array like this:
byte[] messagebuffer = Encoding.Default.GetBytes(JsonConvert.SerializeObject(accountMessage) );
After receiving the message data, you can de-serialise like this:
AccountMessage receivedMessage = JsonConvert.DeserializeObject<AccountMessage>(Encoding.UTF8.GetString(body));
from here
Content Type and Encoding
The content (MIME media) type and content encoding fields allow publishers communicate how message payload should be deserialized and decoded by consumers.
RabbitMQ does not validate or use these fields, it exists for applications and plugins to use and interpret.
by the way, using the rabbitMQ web gui, you use the words content_type, however in code (javascript confirmed), you use the key name contentType. it's a subtle difference, but enough to drive you crazy.
I have a really simple WCF service operation GetCurrentBalance. It returns a decimal.
I also have the odatagen generated entity files included in the project, which contains an implementation of the GetCurrentBalance operation returning a string. Calling this method returns me an XML string with the desired value in it.
I also tried using executeServiceOperation method in the generated class and pass in the operation name as a parameter, the returned value again is the same XML string.
Is there a way to extract this value? Or do I have to write a custom parser for it?
Thanks in advance.
Without further informations, if the returned value is a formatted XML string you may try extracting the value using XPath queries, have a look at this to get you started