Polling http endpoint, receiving JSON response, I wish to keep polling till a condition is met.
I have tried <until-successful failureExpression="#[json:status != 'COMPLETED']" maxRetries="5" secondsBetweenRetries="10" synchronous="true"> but this is giving exception.
Please also let me know if there is another method for my scenario
assign the compute value to flow variable and provide condition evaluting the corresponding flow variable.
<until-successful failureExpression="#[flowVars['testRetryCondition'] != 'COMPLETED']" maxRetries="5" secondsBetweenRetries="10" synchronous="true">
<processor-chain doc:name="Processor Chain">
<http:........./>
<set-variable variableName="testRetryCondition" value="#[json:status != 'COMPLETED']" doc:name="set-invocation-status"/>
</processor-chain>
</until-successful>
Related
I am configuring transaction and response timeout for API in Mule 4, Is there anyway that I set different timeout for different methods(GET,POST,DELETE) for single API in Mule Soft because the API has different SLA for different operations ?
As the http timeout is set at the connector level that does not allow you to set timeouts per method.
One way you could try to achieve this is via separating your interface flow from your logic. Then have your interface flow call your logic flow via something like vm where you can set a timeout individually. You can then catch the timeout error and do what you want with it.
Here is an example that has a flow for a POST method. All this flow does is offload the logic to another floe and invokes that logic using v:publish-consume and awaits the response. It sets a timeout of 2 seconds(configurable with properties etc.) and catches VM:QUEUE-TIMEOUT errors and sets an 'SLA exceeded'error message:
<flow name="myPOSTInterface">
<vm:publish-consume queueName="postQueue" config-ref="vm" timeout="2" timeoutUnit="SECONDS" />
<logger level="INFO" message="Result from logic flow: #[payload]" />
<error-handler>
<on-error-continue type="VM:QUEUE_TIMEOUT">
<set-payload value="#[{error: 'SLA exceeded'}]" />
</on-error-continue>
</error-handler>
</flow>
<flow name="myPOSTLogic">
<vm:listener config-ref="vm" queueName="postQueue" />
<set-payload value="#[{result: 'Result from my logic'}]" />
</flow>
I am using a Message Enricher to call a web services and return what a part number is for the external data source. I am saving that payload into a Session Variable. I am then using a Lookup Table from within a Datamapper to send the current payloads' part number to be referenced against the external data source (using xpath). I am able to invoke the Lookup and pass the local variable but the payload that was saved into the Session Variable is not being passed through to the Lookup Flow, so my xpath query will not work.
Here is the Session Variable and Datamapper
<flow>
<enricher target="#[sessionVars['SesVar']]" doc:name="Message Enricher">
<flow-ref name="query-line-details-erpFlow" doc:name="query-line-details-erpFlow"/>
</enricher>
<logger message="Session Var: #[sessionVars['SesVar']]" level="INFO" doc:name="Logger"/>
<data-mapper:transform config-ref="XML_To_XML" doc:name="XML To XML"/>
</flow>
Here is the Lookup Table logic
output.ExternalPart = (isnull(lookup(LookUpPart).get([input.LocalPart])) ? null : lookup(LookUpPart).get([input.LocalPart]).ExternalPart);
Finally here is the second flow where the Session Var should be accessed from
<flow>
<logger message="Spit out the var #[sessionVars.SesVar]" level="INFO" doc:name="Logger"/>
</flow>
From what research I have done, the Session Variable is not passing a Transport Barrier so it should be able to be referenced from this scope. I have also tried with flowVars also.
Any help would be greatly appreciated.
Below is a part of my mule flow
<until-successful objectStore-ref="ObjStreuntil" maxRetries="60" secondsBetweenRetries="60" doc:name="Until Successful" failureExpression="# [payload.state == 'Queued' || payload.state == 'InProgress']">
<processor-chain doc:name="Processor Chain">
<sfdc:batch-info config-ref="Salesforce" doc:name="Salesforce">
<sfdc:batch-info ref="#[payload]"/>
</sfdc:batch-info>
<logger message="#[payload]" level="INFO" doc:name="Logger"/>
</processor-chain>
</until-successful>
I would like my flow to wait until my batch is completed and then proceed to the next processor. I believed using processing chain will get the outcome.
But the flow doesn't work. I'm aware that until sucessfull is made synchronos in 3.5 is there any method to acheive this on 3.4.0
Any suggestions would be of great help
Thank you in advance
To achieve your goal in 3.4, add a flow-ref or vm:outbound-endpoint after the batch call so the subsequent logic can be executed when the batch is done.
This is preferable to blocking the main flow thread anyways, since batch processing can take a while.
Note that you may need to add a filter after sfdc:batch-info if you want to process the subsequent logic only for certain return codes.
I have a flow something like this
A 'Database inbound endpoint' which polls(for every 5 mins) to mySQL Database-Server and get result-set by a select-query (automatically this becomes the current payload i.e #[message.payload])
'For each' component and a 'Logger' component in it using a expression as #[message.payload]
Now flow has one more 'Database-out-bound-endpoint' component which executes another select-query and obtains result-set.
'For each' component with a 'Logger' component in it using a expression as #[message.payload]
Note: in the loggers result-set of first DB is printing. I mean second logger is also showing result-set of first query itself.Because the result-set is storing as payload
so, my questions are
what is the MEL to read the result-set of second database-query in the above scenario.
is there any another way to read result-set in the flow
Here is the configuration XML
<jdbc-ee:connector name="oracle_database" dataSource-ref="Oracle_Data_Source" validateConnections="true" queryTimeout="-1" pollingFrequency="0" doc:name="Database"/>
<flow name="testFileSaveFlow3" doc:name="testFileSaveFlow3">
<poll frequency="1000" doc:name="Poll">
<jdbc-ee:outbound-endpoint exchange-pattern="one-way" queryKey="selectTable1" queryTimeout="-1" connector-ref="oracle_database" doc:name="get data from table 1">
<jdbc-ee:query key="selectTable1" value="SELECT * FROM TABLE1"/>
</jdbc-ee:outbound-endpoint>
</poll>
<foreach doc:name="For Each">
<logger message="#[message.payload]" level="INFO" doc:name="prints result-set of table1"/>
</foreach>
<jdbc-ee:outbound-endpoint exchange-pattern="one-way" queryKey="selectTable2" queryTimeout="-1" connector-ref="oracle_database" doc:name="get data from table 2">
<jdbc-ee:query key="selectTable2" value="SELECT * FROM TABLE2"/>
</jdbc-ee:outbound-endpoint>
<foreach doc:name="For Each">
<logger message="#[message.payload]" level="INFO" doc:name="prints result-set of table2"/>
</foreach>
</flow>
thanks in advance.
This is not the issue with the MEL. It is the issue with your flow logic.
The second result set is not available in the message.
The JDBC Outbound Endpoint is one-way. So Mule flow will not wait for the reply (result set) from the second JDBC (outbound ) in the middle of the flow. So the second time also it is printing the first result set.
Type 1:
Try making your JBDC outbound request-response instead of one-way.
Type 2:
Try Mule Enricher to call the JDBC outbound to call the DB and store the result set into a varaible and try looping the varaible.
Hope this helps.
<flow>
<jms:inbound-endpoint queue="InputQueue"/>
<component class="MyComponent"/>
<choice>
<when expression="/Response/Status/Success" evaluator="xpath">
<jms:outbound-endpoint queue="LogInputQueue"/>
<jms:outbound-endpoint queue="SuccessQueue"/>
</when>
<when expression="/Response/Status/Error" evaluator="xpath">
<jms:outbound-endpoint queue="LogInputQueue"/>
<jms:outbound-endpoint queue="ErrorQueue"/>
</when>
<otherwise>
<jms:outbound-endpoint queue="LogInputQueue"/>
<jms:outbound-endpoint queue="ExceptionQueue"/>
</otherwise>
</choice>
</flow>
In this flow, MyComponent returns either success message as a response or error response or exception?
I need to log the original message from InputQueue in LogInputQueue in all the cases. How do I achieve this in my flow?
Did you mean to create a log file? In that case, you have to implement log4j using slf4j and use the line
<logger level="log_level" category="your_category" message="#[message:payload]"/>
where log_level is your desired logging level- "error", "debug", "info" etc...
your_category is your category of log defined in the log4j.properties file (it is optional actually)
and message="#[expression:value]" is your message to be logged given as an expression:scope:key combination. Scope is optional here.
Using log4j or slf4j you can log the payload.
[payload],we have logger component using this log payload in console.
Since, you need to send original message from InputQueue to LogInputQueue in all the cases, as you mentioned, what you need to do is :-
1. Remove <jms:outbound-endpoint queue="LogInputQueue"/> from all the cases in choice block
2. Store the original payload from InputQueue in a variable by placing it just after the JMS inbound endpoint
3. At the end of the flow, after the choice router, set the payload in set payload component from variable you stored the original payload
4. Now put <jms:outbound-endpoint queue="LogInputQueue"/> after your set payload component.
In this way you will able to send the original payload to the LogInputQueue as per your requirement.