You are running into problems because you are trying to do something
that is extremely tricky with a circular dependency between
components. I.e., an extremely bad idea in a component oriented
project and probably in any project.
Circular dependency:
ds needs partitions before it's completely initialized
partitions need server entry before they are completely initialized,
ready to go into the ds
server entry comes from ds.
Asking any component system to handle this kind of circular
dependency is ridiculous IMO, and any code you write to do it is
going to be impossible for the naive user to understand and likely to
be prone to very subtle bugs that everyone will spend weeks trying to
diagnose.
I suspect if you construct a bootstrap server entry factory component
that can be used by the partitions used by ds a lot of the problems
will go away.
You can also do things like having a server entry data object that is
injected into the partition and the partition can figure out how to
turn it into a server entry.
From what I've heard on IRC I think I'd recommend:
1. a Registries bean that starts up with the bootstrap registries.
2. partitions get a ref to the registries bean and get a server entry
data object (using a property editor). They construct the
ServerEntry themselves.
3. ds gets a reference to the registries bean; it uses the bootstrap
registries as needed and can tell the registries bean to replace the
registries with the correct ones when it knows what they are.
You might be able to replace (2) with some kind of factory bean
arrangement but unless you can find some really simple spring syntax
to make it work I don't think its worth the trouble.
One nice thing about spring is that the xml makes it pretty clear how
the components are hooked up together and just about everyone
understands how to use it. Writing your own component framework (or,
IMO, even putting the configuration data in the DIT) will make it
much harder for non-insiders to quickly see how the server is put
together and harder to customize it.
thanks
david jencks
On Jan 5, 2008, at 3:23 PM, Emmanuel Lecharny wrote:
<rant>
Now, I'm really pissed off !
I have spent a full day and almost last night to get something
supposely simple to get working. No way.
I may be totally stupid, but considering the committer status is
being meritocratic, I guess that users will be totally fooled by
the current configuration we have.
I just can't stand to loose my time to try to setup a f***ing xml
file to understand what I basically want to do : initialize a
bloody java structure with a list of elements. Period.
Prerequisite : having some access to preset data...
I'm just lost in hundred of stack traces more stupid than the
previous hundred ones, and it seems to be a maze without exit.
WTF for X sake do we have to write such a piece of garbage :
<spring:bean id="systemContextEntry"
class="org.springframework.beans.factory.config.MethodInvokingFactoryB
ean">
<spring:property name="targetObject"><spring:ref
local='directoryService'/></spring:property>
<spring:property name="targetMethod"><spring:value>newEntry</
spring:value></spring:property>
<spring:property name="arguments">
<spring:list>
<spring:value xmlns="http://www.springframework.org/schema/
beans">
ou=system
</spring:value>
<spring:value xmlns="http://www.springframework.org/schema/
beans">
objectClass: top
objectClass: organizationalUnit
objectClass: extensibleObject
ou: system
</spring:value>
</spring:list>
</spring:property>
</spring:bean>
just to call a bloody method with two arguments, to get this as a
result :
_ _ ____ ____ /
\ _ __ __ _ ___| |__ ___| _ \/ ___| / _ \ | '_ \ /
_` |/ __| '_ \ / _ \ | | \___ \ / ___ \| |_) | (_| | (__| |
| | __/ |_| |___) | /_/ \_\ .__/ \__,_|\___|_| |_|\___|
____/|____/ |_|
Exception in thread "main"
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'MainADS' defined in URL [file:/home/
elecharny/apacheds/bigbang/installers/apacheds-noarch/server.xml]:
Cannot resolve reference to bean 'directoryService' while setting
constructor argument; nested exception is
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'directoryService' defined in URL [file:/
home/elecharny/apacheds/bigbang/installers/apacheds-noarch/
server.xml]: Cannot create inner bean '(inner bean)' of type
[org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmPartit
ion] while setting bean property 'systemPartition'; nested
exception is
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name '(inner bean)' defined in URL [file:/home/
elecharny/apacheds/bigbang/installers/apacheds-noarch/server.xml]:
Initialization of bean failed; nested exception is
org.springframework.beans.TypeMismatchException: Failed to convert
property value of type [java.lang.String] to required type
[org.apache.directory.server.core.entry.ServerEntry] for property
'contextEntry'; nested exception is
java.lang.IllegalArgumentException: Cannot convert value of type
[java.lang.String] to required type
[org.apache.directory.server.core.entry.ServerEntry] for property
'contextEntry': no matching editors or conversion strategy found
Caused by: org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'directoryService' defined in URL
[file:/home/elecharny/apacheds/bigbang/installers/apacheds-noarch/
server.xml]: Cannot create inner bean '(inner bean)' of type
[org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmPartit
ion] while setting bean property 'systemPartition'; nested
exception is
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name '(inner bean)' defined in URL [file:/home/
elecharny/apacheds/bigbang/installers/apacheds-noarch/server.xml]:
Initialization of bean failed; nested exception is
org.springframework.beans.TypeMismatchException: Failed to convert
property value of type [java.lang.String] to required type
[org.apache.directory.server.core.entry.ServerEntry] for property
'contextEntry'; nested exception is
java.lang.IllegalArgumentException: Cannot convert value of type
[java.lang.String] to required type
[org.apache.directory.server.core.entry.ServerEntry] for property
'contextEntry': no matching editors or conversion strategy found
Caused by: org.springframework.beans.factory.BeanCreationException:
Error creating bean with name '(inner bean)' defined in URL [file:/
home/elecharny/apacheds/bigbang/installers/apacheds-noarch/
server.xml]: Initialization of bean failed; nested exception is
org.springframework.beans.TypeMismatchException: Failed to convert
property value of type [java.lang.String] to required type
[org.apache.directory.server.core.entry.ServerEntry] for property
'contextEntry'; nested exception is
java.lang.IllegalArgumentException: Cannot convert value of type
[java.lang.String] to required type
[org.apache.directory.server.core.entry.ServerEntry] for property
'contextEntry': no matching editors or conversion strategy found
Caused by: org.springframework.beans.TypeMismatchException: Failed
to convert property value of type [java.lang.String] to required
type [org.apache.directory.server.core.entry.ServerEntry] for
property 'contextEntry'; nested exception is
java.lang.IllegalArgumentException: Cannot convert value of type
[java.lang.String] to required type
[org.apache.directory.server.core.entry.ServerEntry] for property
'contextEntry': no matching editors or conversion strategy found
Caused by: java.lang.IllegalArgumentException: Cannot convert value
of type [java.lang.String] to required type
[org.apache.directory.server.core.entry.ServerEntry] for property
'contextEntry': no matching editors or conversion strategy found
at
org.springframework.beans.TypeConverterDelegate.convertIfNecessary
(TypeConverterDelegate.java:231)
at
org.springframework.beans.TypeConverterDelegate.convertIfNecessary
(TypeConverterDelegate.java:138)
at org.springframework.beans.BeanWrapperImpl.convertForProperty
(BeanWrapperImpl.java:380)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanF
actory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:
1105)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanF
actory.populateBean(AbstractAutowireCapableBeanFactory.java:861)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanF
actory.createBean(AbstractAutowireCapableBeanFactory.java:421)
at
org.springframework.beans.factory.support.BeanDefinitionValueResolver.
resolveInnerBean(BeanDefinitionValueResolver.java:215)
at
org.springframework.beans.factory.support.BeanDefinitionValueResolver.
resolveValueIfNecessary(BeanDefinitionValueResolver.java:127)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanF
actory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:
1099)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanF
actory.populateBean(AbstractAutowireCapableBeanFactory.java:861)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanF
actory.createBean(AbstractAutowireCapableBeanFactory.java:421)
at org.springframework.beans.factory.support.AbstractBeanFactory
$1.getObject(AbstractBeanFactory.java:251)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry
.getSingleton(DefaultSingletonBeanRegistry.java:156)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(
AbstractBeanFactory.java:248)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(
AbstractBeanFactory.java:160)
at
org.springframework.beans.factory.support.BeanDefinitionValueResolver.
resolveReference(BeanDefinitionValueResolver.java:261)
at
org.springframework.beans.factory.support.BeanDefinitionValueResolver.
resolveValueIfNecessary(BeanDefinitionValueResolver.java:109)
at
org.springframework.beans.factory.support.ConstructorResolver.resolveC
onstructorArguments(ConstructorResolver.java:389)
at
org.springframework.beans.factory.support.ConstructorResolver.autowire
Constructor(ConstructorResolver.java:120)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanF
actory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:
799)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanF
actory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:717)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanF
actory.createBean(AbstractAutowireCapableBeanFactory.java:384)
at org.springframework.beans.factory.support.AbstractBeanFactory
$1.getObject(AbstractBeanFactory.java:251)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry
.getSingleton(DefaultSingletonBeanRegistry.java:156)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(
AbstractBeanFactory.java:248)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(
AbstractBeanFactory.java:160)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.p
reInstantiateSingletons(DefaultListableBeanFactory.java:287)
at
org.springframework.context.support.AbstractApplicationContext.refresh
(AbstractApplicationContext.java:352)
at
org.apache.xbean.spring.context.FileSystemXmlApplicationContext.<init>
(FileSystemXmlApplicationContext.java:149)
at
org.apache.xbean.spring.context.FileSystemXmlApplicationContext.<init>
(FileSystemXmlApplicationContext.java:48)
at org.apache.directory.server.Service.init(Service.java:60)
at org.apache.directory.server.UberjarMain.main(UberjarMain.java:
56)
Is it *supposed* to help ??? How many insanity like this will we
support before we can work on real stuff, like how to write a
serious LDAP server? Do we have to whip ourselves, crawl on
sandpaper, walk on fire just to be allowed to bring some line of
not totally meaningless code, or is there a way to get rid of all
those shitty buzzwords called IOC, XML, XSD, Spring, Xbean and any
of such over rated and over abused so called 'technologies' ?
WE ARE LOOSING OUR TIME WITH ALL THOSE USELESS CRAPS !!! KISS, damn !
</rant>
yes, I'm just pissed off ;(
--
--
cordialement, regards,
Emmanuel Lécharny
www.iktek.com
directory.apache.org
