[Camel-users] Unexpected behaviour of Camel Simple expression

On Fri, Dec 5, 2014 at 1:51 AM, welshstew wrote:

Long time lurker - first time poster! Please be nice :)

I have a very simple camel route:

<from uri="timer://foo?period=1000&amp;repeatCount=1" />
<process ref="populateMap" />
<log message="SIMPLE SPRING: INSERT INTO SOMETHING

(${bean:myeval?method=eval(${body[VALUE_ONE]})},${bean:myeval?method=eval(${body[VALUE_TWO]})})"
/>
<process ref="simpleExpProcessor"/>
<log message="${body}" />
<log message="EXPECTED: INSERT INTO SOMETHING ('value','Thing (with
brackets)')" />

The populateMap bean creates a map as follows:

LinkedHashMap<String,Object> map = new LinkedHashMap<String, Object>();
map.put("VALUE_ONE", "'value'");
map.put("VALUE_TWO", "'Thing (with brackets)'");

The log output is:

[pache.camel.spring.Main.main()] SpringCamelContext INFO
Apache
Camel 2.13.3 (CamelContext: camel-1) started in 0.282 seconds
[mel-1) thread #0 - timer://foo] MyEvaluator DEBUG
evaluated : value
[mel-1) thread #0 - timer://foo] MyEvaluator DEBUG
evaluated : 'Thing (with brackets
[mel-1) thread #0 - timer://foo] route1 INFO
SIMPLE
SPRING: INSERT INTO SOMETHING (value,'Thing (with brackets)
[mel-1) thread #0 - timer://foo] SimpleExpressionProcessor DEBUG
INSERT
INTO SOMETHING

(${bean:myeval?method=eval(${body[VALUE_ONE]})},${bean:myeval?method=eval(${body[VALUE_TWO]})})
[mel-1) thread #0 - timer://foo] MyEvaluator DEBUG
evaluated : value
[mel-1) thread #0 - timer://foo] MyEvaluator DEBUG
evaluated : 'Thing (with brackets
[mel-1) thread #0 - timer://foo] route1 INFO
INSERT
INTO SOMETHING (value,'Thing (with brackets)
[mel-1) thread #0 - timer://foo] route1 INFO
EXPECTED: INSERT INTO SOMETHING ('value','Thing (with brackets)')

Am I using the simple expression in the wrong way? As you may expect I am
attempting to build SQL queries/inserts using simple and the results are
not
quite as expected.

Many Thanks,

Stu.




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On 05 Dec 2014, at 09:08, welshstew wrote:

Thanks for your response Taariq - but as you can see form the log output this
isn't the case. The myEval bean actually doesn't do anything but the String
it receives during the simple expression evaluation is missing the single
quotes - as per the log output:

INSERT INTO SOMETHING (value,'Thing (with brackets)

I have published the code to github:

https://github.com/welshstew/simple-test
<https://github.com/welshstew/simple-test>

I'm pulling this out as an example - in another project I am working on
because the bean represented by myEval does not get the correct input - then
the evaluation of my eventual SQL statement ends up being incorrect. :(



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