xstream produces empty body
---------------------------
Key: CAMEL-744
URL: https://issues.apache.org/activemq/browse/CAMEL-744
Project: Apache Camel
Issue Type: Bug
Components: camel-stream
Affects Versions: 1.4.0
Environment: Windows Server 2003; jdk1.6.0_06
Reporter: Vadim Chekan
Priority: Critical
1. Set -Dfile.encoding=Cp1252
2. Set tracing ON.
3. Run the code:
====================================================
from("timer://kickoff?period=10000").
process(new Processor() {
public void process(Exchange exchange) throws Exception
{
ArrayList<HashMap<String, Object>> rows = new
ArrayList<HashMap<String, Object>>();
HashMap<String, Object> row = new
HashMap<String, Object>();
row.put("column1", "Value 1");
rows.add(row);
exchange.getOut().setBody(rows);
}
}).
marshal().xstream().
to("mock:result");
====================================================
3. Observe output:
====================================================
Jul 22, 2008 11:35:28 AM org.apache.camel.processor.Logger process
INFO: ID-vchekan/4855-1216751728436/1-0 -> interceptor1
Interceptor[Delegate(Pipeline[DeadLetterChannel[Delegate([EMAIL PROTECTED]),
RecipientList[log:org.apache.camel.DeadLetterChannel?level=error],
RedeliveryPolicy[maximumRedeliveries=6]], DeadLetterChannel[Delegate([EMAIL
PROTECTED]), RecipientList[log:org.apache.camel.DeadLetterChannel?level=error],
RedeliveryPolicy[maximumRedeliveries=6]],
DeadLetterChannel[Delegate(TraceInterceptor[To[mock:result]]),
RecipientList[log:org.apache.camel.DeadLetterChannel?level=error],
RedeliveryPolicy[maximumRedeliveries=6]]])] InOnly
Properties:{org.apache.camel.timer.time=null,
org.apache.camel.timer.period=10000, org.apache.camel.timer.name=kickoff}
Headers:{} BodyType:null Body:Message: null
Jul 22, 2008 11:35:28 AM org.apache.camel.processor.Logger process
INFO: ID-vchekan/4855-1216751728436/1-0 -> processor1 [EMAIL PROTECTED] InOnly
Properties:{org.apache.camel.timer.time=null,
org.apache.camel.timer.period=10000, CamelCauseException=null,
org.apache.camel.timer.name=kickoff} Headers:{} BodyType:null Body:Message: null
Jul 22, 2008 11:35:28 AM org.apache.camel.processor.Logger process
INFO: ID-vchekan/4855-1216751728436/1-0 -> marshal1 [EMAIL PROTECTED] InOnly
Properties:{org.apache.camel.timer.time=null,
org.apache.camel.timer.period=10000, CamelCauseException=null,
org.apache.camel.timer.name=kickoff} Headers:{} BodyType:java.util.ArrayList
Body:[{column1=Value 1}]
Jul 22, 2008 11:35:29 AM org.apache.camel.processor.Logger process
INFO: ID-vchekan/4855-1216751728436/1-0 -> to1 To[mock:result] InOnly
Properties:{org.apache.camel.timer.time=null,
org.apache.camel.timer.period=10000, CamelCauseException=null,
org.apache.camel.timer.name=kickoff} Headers:{} BodyType:[B Body:
====================================================
As you see xstream returms an empty array (the end of the last line).
4. Change encoding in step 1 to -Dfile.encoding=UTF-8 and re-run the
application.
====================================================
Jul 22, 2008 11:40:18 AM org.apache.camel.processor.Logger process
INFO: ID-vchekan/4875-1216752017927/1-0 -> interceptor1
Interceptor[Delegate(Pipeline[DeadLetterChannel[Delegate([EMAIL PROTECTED]),
RecipientList[log:org.apache.camel.DeadLetterChannel?level=error],
RedeliveryPolicy[maximumRedeliveries=6]], DeadLetterChannel[Delegate([EMAIL
PROTECTED]), RecipientList[log:org.apache.camel.DeadLetterChannel?level=error],
RedeliveryPolicy[maximumRedeliveries=6]],
DeadLetterChannel[Delegate(TraceInterceptor[To[mock:result]]),
RecipientList[log:org.apache.camel.DeadLetterChannel?level=error],
RedeliveryPolicy[maximumRedeliveries=6]]])] InOnly
Properties:{org.apache.camel.timer.time=null,
org.apache.camel.timer.period=10000, org.apache.camel.timer.name=kickoff}
Headers:{} BodyType:null Body:Message: null
Jul 22, 2008 11:40:18 AM org.apache.camel.processor.Logger process
INFO: ID-vchekan/4875-1216752017927/1-0 -> processor1 [EMAIL PROTECTED] InOnly
Properties:{org.apache.camel.timer.time=null,
org.apache.camel.timer.period=10000, CamelCauseException=null,
org.apache.camel.timer.name=kickoff} Headers:{} BodyType:null Body:Message: null
Jul 22, 2008 11:40:18 AM org.apache.camel.processor.Logger process
INFO: ID-vchekan/4875-1216752017927/1-0 -> marshal1 [EMAIL PROTECTED] InOnly
Properties:{org.apache.camel.timer.time=null,
org.apache.camel.timer.period=10000, CamelCauseException=null,
org.apache.camel.timer.name=kickoff} Headers:{} BodyType:java.util.ArrayList
Body:[{column1=Value 1}]
Jul 22, 2008 11:40:18 AM org.apache.camel.processor.Logger process
INFO: ID-vchekan/4875-1216752017927/1-0 -> to1 To[mock:result] InOnly
Properties:{org.apache.camel.timer.time=null,
org.apache.camel.timer.period=10000, CamelCauseException=null,
org.apache.camel.timer.name=kickoff} Headers:{} BodyType:[B Body:<?xml
version="1.0" ?><list><map><entry><string>column1</string><string>Value
1</string></entry></map></list>
====================================================
You see xml now.
I think it is a bug when xstream component silently refuses to work by
producing empty output. It should either take into account configured encoding
when producing output or explicitly refuse to work if encoding is "wrong"
(throw an exception explaining the reasons of error).
Fixing this error is important because it affects at least 2 windows
environments: Eclipse and ActiveMQ.
By default Eclipse on Windows has Cp1252 encoding set.
I do not know what encoding is set in ActiveMQ for Windows but it does not work
unless activemq.bat is edited and encoding is explicitly set there.
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