Thorsten Scherler created COCOON3-121:
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Summary: Create a generic generator that creates a root elemement
and wraps the destination stream into it
Key: COCOON3-121
URL: https://issues.apache.org/jira/browse/COCOON3-121
Project: Cocoon 3
Issue Type: Bug
Components: cocoon-optional
Affects Versions: 3.0.0-beta-1
Reporter: Thorsten Scherler
Assignee: Thorsten Scherler
Fix For: 3.0.0-beta-1
If you use something like ch.qos.logback.classic.log4j.XMLLayout you can create
xml based log files. However the problem is that it does not add root element
making the resulting file not well-formed.
You can activate the logging in your logback.xml like
<appender name="FAILS" class="ch.qos.logback.core.FileAppender">
<file>${crawler.log.error}</file>
<append>false</append>
<encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
<layout class="ch.qos.logback.classic.log4j.XMLLayout">
<locationInfo>true</locationInfo>
</layout>
</encoder>
</appender>
The implemented solution has the following configuration in spring:
<bean name="generator:log4j"
class="org.apache.cocoon.optional.pipeline.components.sax.generator.AddRootElementGenerator"
scope="prototype">
<property name="encoding" value="UTF-8"/>
<property name="localName" value="events"/>
<property name="prefix" value="log4j"/>
<property name="namespace" value="http://jakarta.apache.org/log4j/"/>
</bean>
and later parse the file that the appender gives like:
<map:pipeline>
<map:match pattern="errorLogs">
<map:generate src="${crawler.log.error}" type="log4j"/>
<map:serialize type="xml" />
</map:match>
</map:pipeline>
which will result in something like:
<?xml version="1.0" encoding="UTF-8"?>
<log4j:events xmlns:log4j="http://jakarta.apache.org/log4j/";>
<log4j:event logger="org.apache.droids.exception.ExceptionHandler"
timestamp="1361325224196" level="ERROR" thread="main">
<log4j:message><![CDATA[org.apache.droids.core.DroidsException:
org.apache.droids.core.DroidsException: org.apache.droids.core.DroidsException:
org.apache.http.client.HttpResponseException: Internal Server Error
http://localhost:8888/xxx/details/xxx]]>
</log4j:message>
<log4j:locationInfo class="org.apache.droids.exception.ExceptionHandler"
method="handleException" file="ExceptionHandler.java" line="23"/>
</log4j:event>
</log4j:events>
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