How to pass parameters to datamapper in mule and access them. (In XSLT, I pass them as context parameters, receive them in param and access using $ symbol). I need to do the same thing in datamapper. Any suggestions/links/example are appreciated.
Approach1:
We are using invokeTransformer method in datamapper
output.abc= invokeTransformer("MyTransformer",input.abcdef);
This MyTransformer is a java component which has this default method overridden.
#Override
public String transformMessage(MuleMessage message, String outputEncoding)
throws TransformerException {
System.out.println("Inside transformer" +message.getProperty ("sessionVariable1",PropertyScope.SESSION));
return message.getProperty("sessionVariable1",PropertyScope.SESSION);
But, the problem is I am not calling this transformer from mule flow. But, invoking it from datamapper. Hence the argument 'message' does not get passed. So, Unable to retrive that session variable to return to datamapper. Is there a way to send this argument(MuleMessage from datamapper)?
You can use input arguments with DataMapper and then refer to them in the output:
<set-variable variableName="testvar" value="value of testvar"/>
<data-mapper:transform config-ref="new_mapping_grf"">
<data-mapper:input-arguments>
<data-mapper:input-argument key="testvar">#[flowVars['testvar']]</data-mapper:input-argument>
</data-mapper:input-arguments>
</data-mapper:transform>
and
output.myField = invokeTransformer("MyTransformer",inputArguments.testvar);
or
output.myField = inputArguments.testvar;
Adding input arguments available in the DataMapper GUI through the input side green plus icon.
Related
I am in the process of implementing a LoanBroker with Mulesoft but have an error message when sending a request. I get the following error message back from Postman and Mulesoft Anypoint Studio:
ERROR 2021-06-27 15:20:51,133 [[MuleRuntime].uber.04: [loanbroker].LoanBrokerFlow_Gr7.CPU_LITE #254be3ee] [processor: LoanBrokerFlow_Gr7/processors/0; event: 7e49f560-d74a-11eb-b598-b66921dc5aa5] org.mule.runtime.core.internal.exception.OnErrorPropagateHandler:
********************************************************************************
Message: "You called the function 'Value Selector' with these arguments:
1: Binary ("" as Binary {base: "64"})
2: Name ("amount")
But it expects one of these combinations:
(Array, Name)
(Array, String)
(Date, Name)
(DateTime, Name)
(LocalDateTime, Name)
(LocalTime, Name)
(Object, Name)
(Object, String)
(Period, Name)
(Time, Name)
1| payload.amount
^^^^^^^^^^^^^^
Trace:
at main (line: 1, column: 1)" evaluating expression: "payload.amount".
Element : LoanBrokerFlow_Gr7/processors/0 # loanbroker:bi_gruppe7.xml:34 (Copy_of_setAmount)
Element DSL : <set-variable value="#[payload.amount]" doc:name="Copy_of_setAmount" doc:id="cbcca557-1a69-4cf2-80b1-64333175589d" variableName="amount"></set-variable>
Error type : MULE:EXPRESSION
FlowStack : at LoanBrokerFlow_Gr7(LoanBrokerFlow_Gr7/processors/0 # loanbroker:bi_gruppe7.xml:34 (Copy_of_setAmount))
(set debug level logging or '-Dmule.verbose.exceptions=true' for everything)
********************************************************************************
Can anyone help me?
Thanks
This generally happens when one tries to access inner value of a payload like json but incoming payload is NOT actually a json type.
One could check the payload mediaType and then try to access the amount in order to avoid Value Selector exception.
%dw 2.0
output application/java
---
if( !isEmpty(payload) and payload.^mediaType contains "json" )
payload.amount
else
read(payload, "application/json").amount //best effort
Would recommend creating a separate dataweave file like dwl/set-amount.dwl and referencing it.
You are probably sending some body in the HTTP request from Postman but Mule doesn't know how to read it. Maybe you did not the Content-Type header in the request to let DataWeave know it is a JSON (application/json) or XML (application/XML).
Ensure you are sending the right content type.
I ran into the same situation. I know exactly the base64 is a json. So, I tried to set the MIME Type by
<set-payload value="#[payload]" doc:name="Set Payload" mimeType="application/json"/>
It works for me.
I'm a new User of POCO and could get HTTP response after HTTP::Request.
By the way, How do I create HTTP request with some parameters? For example, I want to set URI, http://xxxx/index.html?name=hoge&id=fuga&data=foo.
Of course I know it's possible if I set this uri directly. But I want to realize this like below. Does anyone know this way?
URI uri("http://xxx/index.html");
uri.setParam("name", "hoge");
uri.setParam("id", "fuga");
uri.setParam("data", "foo");
If you had looked up the documentation for Poco::URI, you'd see it's done with uri.addQueryParameter("name", "value"):
void addQueryParameter(
const std::string & param,
const std::string & val = ""
);
Adds "param=val" to the query; "param" may not be empty. If val is empty, only '=' is appended to the parameter.
In addition to regular encoding, function also encodes '&' and '=', if found in param or val.
You can also set all the parameters with setQueryParameters.
Unfortunately, Poco doesn't let you set the value of an existing query parameter (or remove it). If you want to do that, you have to clear the query portion of the URI and readd all the parameters you want with their values.
I am passing an Employee Object Form Client in RestFul webservices Jaxrs2/jersy2
#GET
#Path("{empObj}")
#Produces(MediaType.APPLICATION_XML)
public Response readPK(#PathParam("empObj")Employee empObj) {
//do Some Work
System.out.println(empObj.getName());
return Response.status(Response.Status.OK).entity(result).build();
}
how can achive this object using GET method??
thanx in advance
By using #PathParam on a method parameter / class field you're basically telling JAX-RS runtime to inject path segment (usually string) to your (String) parameter. If you're sending an object (Employee) representation directly via your URI (query param, path param) you should also provide ParamConverterProvider. Beware that this is not possible in some situation and it's not a recommended practice. However, if you're sending the object from client to server in message body, simply remove #PathParam and MessageBodyReader will take care of converting input stream to your type:
#GET
#Path("{empObj}")
#Produces(MediaType.APPLICATION_XML)
public Response readPK(Employee empObj) {
//do Some Work
System.out.println(empObj.getName());
return Response.status(Response.Status.OK).entity(result).build();
}
how can I get certain parameter from url directly from struts2?
http://apps.facebook.com/testApp/myaction.action#param1=a1afacf5¶m2=AAADpzov7PBMBA
Previously, getting param1 and 2 from javascripts in JSP using window.location.href.slice. Now I want to get those params directly from action class. I tried to get those using request.getParameter("param1"), but getting null.
All you need to create property in your action class and provide there getter and setters,once this is done framework will push them in to the ValueStack with action processing.
OGNL expression will help you to access the properties being there in the Value-Stack.You have to do something like
Action Class
public class MyAction extends ActionSupport{
private String param1;
private Sting param2;
// provide getter and setters for the above properties
public String execute() throws Exception{
// your action logic and provide param1,param2 values which you want in you JSP
return SUCCESS;
}
}
once you action get called both the parameters will be pushed to value stack with the values you have provided in the action class,all you need to access them in your JSP with OGNL like
JSP page
<s:property name="param1" value="param1"/>
<s:textfiled name="param2" value="%{param2}"/>
I have an ASP.NET webservice and some of the fields in the request are defined as enums. When entering a blank or invalid value, the response comes back as:
Parameter name: type ---> System.ArgumentException: Must specify valid information for parsing in the string.
at System.Enum.Parse(Type enumType, String value, Boolean ignoreCase)
at System.Web.Services.Protocols.ScalarFormatter.FromString(String value, Type type)
--- End of inner exception stack trace ---
at System.Web.Services.Protocols.ScalarFormatter.FromString(String value, Type type)
at System.Web.Services.Protocols.ValueCollectionParameterReader.Read(NameValueCollection collection)
at System.Web.Services.Protocols.HtmlFormParameterReader.Read(HttpRequest request)
at System.Web.Services.Protocols.HttpServerProtocol.ReadParameters()
at System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest()
Is it possible to capture errors like this and return an XML based response instead?
No, there's no way to do this with ASMX web services.
Naturally, you can do this with WCF.
Of course, it would be better if your client sent valid data. You might want to find out why they aren't.
Sure, it would look something like this:
try
{
Enum.Parse(Type enumType, String value, Boolean ignoreCase)
}
catch (ArgumentException e)
{
//Serialise exception information from 'e' into XML
//(not shown here) and set it as the response
Response.Write(xmlMessage);
Response.End();
}