Looking through Camel docs I couldn't find any way that allow me to bind the query parameters within the headers. For example :
Let's say I have an endpoint like that
http://localhost:8080/services/resource?filter=xxx
End I want to get that parameter from the header
exchange.getIn.().getHeaders().get('filter')
The query parameter 'filter' is not returned in the header. Anyone of you knows if this feature is coming by default in camel? I know I can build the binding by myself, but i am just looking for choose among camel-servlet (apparently that binding is implemented by default) and camel-restlet.
If you choose camel-restlet you can use the
restletBinding=#refName
to convert the query string parameters to headers.
The #refName is the bean ID of a RestletBinding object in the Camel Registry.
Related
Assuming I have set a Camel exchange property in a Processor ...Example
exchange.setProperty(LASTPROCESSED, sortedBody[0].attribute6)
What would be the proper way of referencing this property in my XML based route ?
I tried ${property:LASTPROCESSED} and ${exchangeProperty:LASTPROCESSED}
I have no trouble referencing exchange Headers ( i.e. ${headers.xxx} )
Yes ...I have trolled through countless answers here without finding a solution.
I am running Camel 3.x
Turns out I had an issue elsewhere in the Route ...the proper way to access appears to be ${exchangeProperty.xxx}
I have a camel route that splits and aggregates according to some ids. When an id is retrieved, a call is made to another endpoint to retrieve the project information according to this id. After retrieving the project information i had to enrich it by calling multiple enrich() methods on it. In the first enrich method i have to do some xpath processing wherein ill be able to retrieve a primaryOrgId value that i will set as a property in the exchange, dont worry about the xpath processing, i had that sorted out but my problem is when I set the property (primaryOrgId) inside the 1st enrich. The property value doesn't get persisted when the route goes to the 2nd enrich part. When I log the primaryOrgId value, the original value of "testValue" (this was set in the direct:createSomeIds route) is the one getting displayed instead of "changeTheValueHere" which was set in the 1st enrich part.
I am using Camel 2.15 based on Fuse 6.2.1.
I went to the camel site and read this part from http://camel.apache.org/content-enricher.html . I'm not sure I understood how to implement... "For that you must set the filename in the
endpoint URI" .. this text was talking about the header, i'm thinking its also applicable to the properties in the exchange.
pollEnrich or enrich does not access any data from the current
Exchange which means when polling it cannot use any of the existing
headers you may have set on the Exchange. For example you cannot set a
filename in the Exchange.FILE_NAME header and use pollEnrich to
consume only that file. For that you must set the filename in the
endpoint URI.
Here is my code:
from("direct:createSomeIds")
.routeId("createSomeIds")
.process(new IdCreatorProcessor()
.setProperty("primaryOrgId").constant("testValue")
.split(xpath("/TempProjects/TempProject/Code/text()").namespaces(ns) , new IdStrategy())
.to("direct:splitRouteById")
.end();
from("direct:splitRouteById")
.routeId("splitRouteById")
.to("direct:getProjectByID")
.to("xquery:template/AllProjectToSingleProject.xq") //xquery template
.convertBodyTo(Project.class)
.enrich("direct:getAdditionalInfo", new ProjectStrategy(ProjectStrategy.AggregatorType.AdditionalInfo))
.enrich("direct:getSecondaryInfo", new ProjectStrategy(ProjectStrategy.AggregatorType.SecondaryInfo))
.end();
from("direct:getAdditionalInfo")
//some xpath stuff here
.setProperty("primaryOrgId").constant("changeTheValueHere")
.end();
from("direct:getSecondaryInfo")
.log("Value of primaryOrgId = " + "${exchangeProperty.primaryOrgId}")
.end();
If you can provide some code example, that would be helpful.
If you read a bit further down you will see that it's recommended that you instead use RecipientList with an AggregationStrategy.
.recipientList("direct:getAdditionalInfo", "direct:getSecondaryInfo")
.aggregationStrategy(new ProjectStrategy())
The setting of filename in your endpoint URI would only be applicable if you were to access some file on an FTP or some other file area.
Edit:
I now see that you need the property from the first enrichment in your second enrichment. However, if you're not modifying the message body in the first enrich then I don't actually see the need for it at all.
If you are in fact modifying the body then you can still use the RecipientList but instead you use two separate ones calling only one endpoint in each.
I'm trying to use Apache Camel (version 2.20.0) with mybatis component.
More specifically, I have to export a large set or record from database to file.
I'd like to prevent memory issues so I want to use the option consumer.useIterator. My route is:
from("mybatis:selectItemsByDate?statementType=SelectList&consumer.useIterator=true")
.split()
.body()
.process(doSomething)
to(file:my-path-file);
but my query has in input a parameter (the starting date to get data). How should I set this parameter?
In many example on internet I saw the parameter in the body or in the header of the Exchange message but I think is possibile only if the mybatis endpoint is in a "to" method. But the option "consumer.useIterator" is working only when the enpdoint is in a "from" method.
Please help me to understand how I can set the input for my query or if this is not supported yet (in this case if you can give some hint how to implement would be great)
thank you.
Then you need to start your route from something else, like a timer or direct endpoint, and then call the mybatis endpoint in a to, where you have set that information in the message body/header you use in the mybatis query so its dynamic.
Also you should set the splitter to be in streaming mode so it walks the iterator it gets from mybatis on-demand.
This is my route. I want to send a file to an Azure blob. I want to set the name of the blob as the file name without extension. I also want to filter out the whitespaces from the file names. I am thinking of using an interceptor
from("file://C:/camel/source1").recipientList(simple("azure-blob://datastorage/container1/${header.fileName}?credentials=#credentials&operation=updateBlockBlob"))
I want to invoke the interceptor only for updateBlockBlob operatin
interceptSendToEndpoint("^(azure-blob:).+(operation=updateBlockBlob)").setHeader("fileName",simple("${file:onlyname.noext}")).convertBodyTo(File.class)
The above code works with interceptFrom().
I tried replacing the regular expression with wild card like azure* i.e interceptSendToEndpoint("azure*"). It did not work
Whats wrong with the above code? Is it because of recipientList?
Also what features does simple have to remove white space?
Is there a better way to generate blob names dynamically?
Here is the documentation from camel on interceptors.
http://camel.apache.org/intercept.html
interceptFrom that intercepts incoming Exchange in the route.
interceptSendToEndpoint that intercepts when an Exchange is about to
be sent to the given Endpoint.
So I suspect the Exchange is already formed and camel expects the url to be resolved.
So the header needs to be set before the exchange is created for the Azure end point.
I did the following. To set the header, I use the interceptFrom, and to convert the object into File I used the inteceptSendToEndPoint
interceptSendToEndpoint("^(azure-blob:).+(operation=updateBlockBlob)").convertBodyTo(File.class)
interceptFrom().setHeader("fileName",simple("${file:onlyname.noext}".replaceAll("[^a-zA-Z\d]")))
Managed to get rid of the whitespace too
I am trying to intercept an endpoint where the value of the URI matches some information in the exchange header.
Let say I have a field in the header called DatabaseName. I want to enforce that a specific route is only writing to the database specified in the header.
Can I do something like this?
interceptSendToEndpoint("mock:${in.header.DatabaseName}")
I tried that but it does not seem to work. What are my options?
I was also thinking of doing something like:
interceptSendToEndpoint("mock:*").when(...)?
But in this case, I am not sure if I can reference the URI of the intercepted node in the when expression.
Thanks
You can intercept using a wildcard and combine that with when to do what you want, see details at: http://camel.apache.org/intercept
The is a header on the Message with the key Exchange.INTERCEPTED_ENDPOINT (CamelInterceptedEndpoint) that has the endpoint uri that was intercepted. You can use that in the when to match the predicate. Something a like:
interceptSendToEndpoint("mock:*")
.when(simple("${header.CamelInterceptedEndpoint} == ${in.header.DatabaseName}"))
...
Use the recipientList instruction for this: http://camel.apache.org/how-do-i-use-dynamic-uri-in-to.html