I am trying to learn a mirth system with a channel that is pulling from a database for its source and outputting hl7 messages for its destination(s). The SQL query pulls the correct data from the source--but Mirth does not output all of the data in the right spots in the HL7 message. The destinations show that it is outputting Template:${message.encodedData}. What does that mean? Where can I see the template that it using. The destinations don'y have any filters or transformers so I am confused.
message.encodedData is the fully transformed message - after any transformation steps.
The transformer is also where you can specify the output template for how you want the data to look. Simply load up a sample template message in the output template of the transformer (message template tab in the transformer) and then create a series of message builder steps. Your output message will be in the variable tmp, and your sql results will be in the variable msg.
So, if your first column is patientID (Select patientiD as patientID ...), you would create a message builder steps along the lines of
mapped segment: tmp['PID']['PID.3']['PID.3.2']
mapping: msg['patientID'];
I don't have exact syntax in front of me right now, but that's the basic idea.
I think "transformed" is the status of the message right after the transformers are executed and "encoded" message is the status after the message that comes from the transformers is encoded into the specified channel outbound datatype. In some cases those messages will be the same but not in all the cases.
Also, is very difficult to find updated and comprehensive Mirth documentation.
Related
I am trying to use debezium server to stream "some" changes in a postgresql table. Namely this table being tracked has a json type column named "payload". I would like the message streamed to pubsub by debezium to contain only the contents of the payload column. Is that possible?
I ve explored the custom transformations provided by debezium but from what I could get it would only allow me to enrich the published message with extra fields, but not to publish only certain fields, which is what I want to do.
Edit:
The closest I got to what I wanted was to use the outbox transform but that published the following message:
{
"schema":{
...
},
"payload:{
"key":"value"
}
Whereas what I would like the message to be is:
{"key":"value"}
I ve tried adding an ExtractNewRecordState transform but still got the same results. My application.properties file looks like:
debezium.transforms=outbox,unwrap
debezium.transforms.outbox.type=io.debezium.transforms.outbox.EventRouter
debezium.transforms.outbox.table.field.event.key=grouping_key
debezium.transforms.outbox.table.field.event.payload.id=id
debezium.transforms.outbox.route.by.field=target
debezium.transforms.outbox.table.expand.json.payload=true
debezium.transforms.unwrap.type=io.debezium.transforms.ExtractNewRecordState
debezium.transforms.unwrap.add.fields=payload
Many thanks,
Daniel
With the Copy Data transformation it is possible to retrieve data from a REST call (array with flat json objects, similar to Odata) and copy the contents to a flat table keeping the data types from the source but without the necessity to set the schema for that specific data.
When I try to recreate this with Data Flow, I can't get this to work. When I check the Data Preview of my Source I get a hierarchy with a body (with my odata like data) and a header. And if I send that to my sink (Avro) it will be saved in this same hierarchical structure (including the header). I know I can fix this manually by using a Select operation (body.column1, body.column2, etc.), but I want to make my Data Flow dynamic so I'm able to use it with multiple tables/endpoints.
So I receive it like this with my REST source:
link
And I want it to be like this at my Sink without hardcoding my schema:
link
The only work around I can come up with is retrieving the data using Copy Data, put it somewhere temporarily and then use my data flow to further transform the data. Is there a more easy way to do this? I cannot imagine that I'm the only one that has this issue.
Hopefully it's clear and somebody is able to help. Thank you very much in advance.
Data flow projection will get schema from API including body and header. Hence, when you use auto mapping everything going to be saved.
Below work arounds you can think of,
As you mentioned, using copy data first and then data flow to further transform.
Use select or derived column transformations and transform your data to get all column names and then finally use sink. For this you can opt with Column pattern matching syntax. So that one condition can be meet with multiple columns to transform.
Check below link to know about column pattern mappings.
https://learn.microsoft.com/en-us/azure/data-factory/concepts-data-flow-column-pattern
I have a meta-data driven pipeline and a mapping data flow to load my data. When I try to run this pipeline, I get the following error.
{"message":"at Derive 'TargetSATKey'(Line 42/Col 26): Column 'PersonVID' not found. The stream is either not connected or column is unavailable. Details:at Derive 'TargetSATKey'(Line 42/Col 26): Column 'PersonVID' not found. The stream is either not connected or column is unavailable","failureType":"UserError","target":"Data Vault Load","errorCode":"DFExecutorUserError"}
When I debug the mapping data flow, all the components in the data flow work as intended.
I guess that my source connection parameters aren't flowing through properly. Below is an email of my source connection
Please let me know if you have any thoughts and questions
I found a resolution to my problem. The error was the data being passed in was a string but when the variable was unpacked my variable value didn't have a quote around it. Putting in the quotes fixed it.
For example
'BusinessEntityID'
Please let me know if there are any questions
I would like to read a HL7 message containing multiple orders (ORC segments). My destination is a web service sender which can only handle one order at a time.
How can I iterate through the input HL7 message and send to a destination each time?
Thanks for any help.
As is stated above there are several ways to do it.
I normally did this in a JavaScript transformer step. I basically built a small state engine that would iterate over the incoming (raw) message by splitting the incoming message on '\r' characters. It would then build the outbound message as a string by identifying the "header" section (part that does not change) and storing that in a string, say Header, and the order section (the part that does change) as another string, say Order, and the concatenating them together when I reach the next order or the end of the string and sending them to another channel with
router.routeMessage('channelName', Header + '\r' + Order);
You may create another channel that communicates with your web-service and route the ORC portion to that channel.
For additional information you may read the "Unofficial Mirth Connect Developer's Guide" available at mirthconnect.shamilpublishing.com
(Disclaimer: I'm the author of this guide so any comments or suggestions are welcome.)
I have a requirement where I have to read data from sql server local database and first map it in XML file provided by another third party org. who have their own database. Then once I have proper mapping of fields I have to transform the data from sql server database to XML format and vice versa.
So far, I am able to connect sqlserver database in mirthconnect however I dont know what steps are required to create in channels and transformer to carry the task of reading data and mapping corresponding fields to XML format provided by third party and finally writing in XML file provided and vice versa.
In short if I can get details of creating such channel in mirth connect where I can read sql server database and map the fields in corresponding xml file....I guess I can write to it. Same way applies if I go from xml format to sqlserver database. Can someone tell me how to accomplish this?
For database field mapping whats the best way to map fields entirely on two different databases is there any tool which can help....
Also once the task of transforming the data from one end to another is accomplished is there any way of validation in mirth connect that verifies that data is correctly moved from one to another?
If you want to process one row at a time, the normal database reader will work fine; just set the data type under Summary to XML for all steps. Set a destination of channel writer to nowhere and run it once to see what it does in the Dashboard. You can copy and paste that as an example into your message template so you can map variables.
If you want to work an entire result at one time in the Transformer steps, I find it easier to create a custom reader and use "FOR XML RAW, ELEMENTS" on the end of my Microsoft SQL query.
Something like:
//build connection
var dbConn = DatabaseConnectionFactory.createDatabaseConnection('com.microsoft.sqlserver.jdbc.SQLServerDriver','jdbc:sqlserver://servername:1433;databaseName=dbname;integratedSecurity=true;','',''); //this uses the MS JDBC driver and auth dll
//query results with XML output from server 'FOR XML' statement at end
var result = dbConn.executeCachedQuery("SELECT col1 AS FirstColumn, col2 AS SecondColumn FROM [dbname].[dbo].[table1] WHERE [processed] = 'False' FOR XML RAW, ELEMENTS");
//Make sure we are at the top of results
result.beforeFirst();
//wrap XML. Namespace etc. not required
XMLresult = '<message>';
//XML broke up across several rows in one column. Re-combine
while (result.next()) {
XMLresult += result.getString(1);
}
XMLresult += '</message>';
dbConn.close();
return XMLresult;