Apache Camel - File Transfer on Particular Route Call - apache

Question

I'm trying to create a webservice which, when called look into a local directory picks up files from there and upload to the ftp server.
I'm able to create a simple route which picks file from local directory and uploads to ftp server below is the code :
<route>
<from uri="file://D:\\FTPTest?noop=true&delay=2000" />
<to uri="ftp://user#host.in:21/public_html/EnterpriseProject?password=password123#"/>
<to uri="bean:myBean?method=test" />
</route>
But, I want to this file transfer to be called when a particular route is called via restlet webservice is called, I tried with the following code, but it didn't work :
<route>
<from uri="direct:fileTransferRoute" />
<to uri="file://D:\\FTPTest?noop=true&delay=2000" />
<to uri="ftp://user#host.in:21/public_html/EnterpriseProject?password=password123#"/>
</route>
The above route is called by restlet from following route :
<route>
<from
uri="restlet:http://0.0.0.0:9080/csitec/{serviceName}?restletMethod=post" />
<process ref="serviceRouteProcessor" />
<toD uri="direct:${in.header.nextRoute}" />
</route>
Here's the code of my serviceRouteProcessor :
public void process(Exchange exchange) throws Exception {
String body = exchange.getIn().getBody(String.class);
String serviceName = exchange.getIn().getHeader(Constants.SERVICE_NAME).toString();
String nextRoute = serviceName+Constants.NEXT_ROUTE_APPENDER;
exchange.getOut().setHeader(Constants.NEXT_ROUTE, nextRoute);
exchange.getOut().setBody(body);
}
Please help me and suggest the changes needs to be done to make it work like this.

Answer 1

You should try the pollEnrich feature of content-enricher
In the example section you can find a example regarding files.
Your route should look something like this(I work only with camel java dsl, so this a bit xml pseudo code):
<route>
<from uri="direct:fileTransferRoute" />
<pollEnrich uri="file://D:\\FTPTest?fileName=data.txt....." />
<to uri="ftp://user#host.in:21/public_html/EnterpriseProject?password=password123#"/>
</route>

Answer 2

Edited :
you must understand one thing first , to is producer not consumer <to uri="file://D:\\FTPTest?noop=true&delay=2000" />
What you can do is ,
#Autowired
private CamelContext context;// if you have more than one camel context use #Qualifier and wire by bean id
public void process(Exchange exchange) throws Exception {
String body = exchange.getIn().getBody(String.class);
String serviceName = exchange.getIn().getHeader(Constants.SERVICE_NAME).toString();
context.startRoute(serviceName+Constants.NEXT_ROUTE_APPENDER);// here in nextroute you must give the routeid
}
your route must look like
<route id = "<value of serviceName+Constants.NEXT_ROUTE_APPENDER>" autoStartup = "false">
<from uri="file://D:\\FTPTest..." />
<onCompletion onFailureOnly="true">
<choice>
<when>
<simple>${property.CamelBatchComplete}</simple>
<process ref="asyncSelfShutdownProcessor"/>
</when>
</choice>
</onCompletion>
<to uri="ftp://user#host.in:21..."/>
</route>
And add asyncSelfShutdownProcessor to spring context
#Component
public class AsyncSelfShutdownProcessor implements AsyncProcessor {
#Autowired
private CamelContext context
public boolean process(Exchange exchange, AsyncCallback callback){
new Thread(() -> context.stopRoute(exchange.getFromRouteId())).start();
}
}
##############################################################################
Old :
OK I understand your need as - you have a route that moves file from file system to ftp server, all you need is this route to get executed only when you trigger from a rest service. I would do it like this ,
*I will make the route autoStartup = "false" and assign as id = "fs-to-ftp" to the route
<route id = "fs-to-ftp" autoStartup = "false">
<from uri="file://D:\\FTPTest..." />
<onCompletion onFailureOnly="true">
<process ref="asyncSelfShutdownProcessor"/>
</onCompletion>
<to uri="ftp://user#host.in:21..."/>
</route>
**Add a self shutdown async process in onComplete to the route "fs-to-ftp". Async Processor
asyncSelfShutdownProcessor= AsyncProcessorConverterHelper.convert(exchange -> {
new Thread(() -> context.stopRoute("fs-to-ftp")).start();
});
***Add the camel context dependency to rest service and start the route by id in the rest service context.startRoute("fs-to-ftp")