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Posted to users@cxf.apache.org by Jerome Revillard <jr...@maatg.com> on 2011/03/17 12:43:24 UTC
Coloc + Tomcat webapps
Dear all,
I'm currently deploying different CXF services inside Tomcat. Each service
is inside his own webapps so the class loaders are different. I want to
communicate between the different services using the coloc feature but it
seems that the classloader is a problem.
Indeed, let's take an example. Let's assume that I have a service A in
webappsA and a service B in webAppsB. As far as I understood looking at the
source code, the webappsA class loader will contain it's own list of CXF
servers with one instance of ServerImpl for the services A and the webappsB
will contain also it's own list of CXF servers and this list will contain
only the server of the service B.
The Coloc interceptor check the coloc feature by looking inside the Server
list a corresponding server but it my case, for instance, if the coloc
feature is requested for the service A to contact B, the webappsA class
loader will never find the Server B as it's in the webapssB classloader
only.
Do you know how I can manage it? I will try to move some jars inside the
common webapps but I wonder if I will no break something....
I want to use the coloc feature in order to give really quick access to
sensitive methods (that I cannot provide as jar because of a lot of
configuration/security issues) to the services. Do you see another way to do
it?
All the best,
Jerome
--
View this message in context: http://cxf.547215.n5.nabble.com/Coloc-Tomcat-webapps-tp3873140p3873140.html
Sent from the cxf-user mailing list archive at Nabble.com.
Re: Coloc + Tomcat webapps
Posted by Jérôme Revillard <jr...@maatg.com>.
Thanks a lot Dan, I'll try it.
All the Best,
Jerome
Le 17/03/2011 17:49, Daniel Kulp a écrit :
> On Thursday 17 March 2011 7:43:24 AM Jerome Revillard wrote:
>> Dear all,
>>
>> I'm currently deploying different CXF services inside Tomcat. Each service
>> is inside his own webapps so the class loaders are different. I want to
>> communicate between the different services using the coloc feature but it
>> seems that the classloader is a problem.
> There are a bunch of problems, the classloaders likely being the biggest one
> though.
>
>> Indeed, let's take an example. Let's assume that I have a service A in
>> webappsA and a service B in webAppsB. As far as I understood looking at the
>> source code, the webappsA class loader will contain it's own list of CXF
>> servers with one instance of ServerImpl for the services A and the webappsB
>> will contain also it's own list of CXF servers and this list will contain
>> only the server of the service B.
>>
>> The Coloc interceptor check the coloc feature by looking inside the Server
>> list a corresponding server but it my case, for instance, if the coloc
>> feature is requested for the service A to contact B, the webappsA class
>> loader will never find the Server B as it's in the webapssB classloader
>> only.
>>
>> Do you know how I can manage it? I will try to move some jars inside the
>> common webapps but I wonder if I will no break something....
> You would need to have all the CXF jars into the share/lib dir as well as the
> jars that contain all the classes and interfaces that would be shared. If
> the types are not shared, they would also end up in different classloaders and
> thus not shareable.
>
> One that is all set, you would likely need to write another java object (also
> placed in the share/lib area) that would implement the ServerRegistry
> interface and replace the default ServerRegistry of the bus with that.
>
> Likely, the best approach is to subclass our ServerRegistryImpl and just
> override the getServers() call to return a full collection. Thus, something
> like: (pseudo code, haven't compiled it or anything)
>
> public class MyServerRegistry extends ServerRegistryImpl {
> static List<WeakReference<MyServerRegistry>> allRegistries
> = new LinkedList<WeakReference<MyServerRegistry>>();
>
> public MyServerRegister(Bus b) {
> super(b);
> synchronized(allRegistries) {
> allRegistries.add(new WeakReference<MyServerRegistry>(this));
> }
> }
> //return the list of servers local to this bus/app
> public List<Server> getLocalServers() {
> return super.getServers();
> }
>
> public List<Server> getServers() {
> List<Server> ret = new ArrayList<Server>();
> synchronized (allRegistries) {
> ListIterator<WeakReference<MyServerRegistry>> iterator
> = allRegistries.listIterator();
> while (iterator.hasNext()) {
> WeakReference<MyServerRegistry> b = iterator.next();
> MyServerRegistry r = b.get();
> if (r == null) {
> //it's been garbage collected, remove the reference
> iterator.remove();
> } else {
> ret.addAll(r.getLocalServers());
> }
> }
> }
> return ret;
> }
>
>
> You can then register that in your spring config via:
>
> <bean id="org.apache.cxf.endpoint.ServerRegistry"
> class=".....MyServerRegistry"
> lazy-init="false">
> <constructor-arg ref="cxf"/>
> </bean>
>
>
>
>> I want to use the coloc feature in order to give really quick access to
>> sensitive methods (that I cannot provide as jar because of a lot of
>> configuration/security issues) to the services. Do you see another way to
>> do it?
> The above should do it.
>
> Dan
>
>
>> All the best,
>> Jerome
>>
>> --
>> View this message in context:
>> http://cxf.547215.n5.nabble.com/Coloc-Tomcat-webapps-tp3873140p3873140.htm
>> l Sent from the cxf-user mailing list archive at Nabble.com.
--
=====================================================
Dr Jérôme Revillard
CTO MAAT France
www.maatg.com
Immeuble Alliance Entree A,
74160 Archamps (France)
Mob. 0034 607 700 106
Tel. 0033 450 439 602
Fax. 0033 450 439 601
=====================================================
Re: Coloc + Tomcat webapps
Posted by Daniel Kulp <dk...@apache.org>.
On Thursday 17 March 2011 7:43:24 AM Jerome Revillard wrote:
> Dear all,
>
> I'm currently deploying different CXF services inside Tomcat. Each service
> is inside his own webapps so the class loaders are different. I want to
> communicate between the different services using the coloc feature but it
> seems that the classloader is a problem.
There are a bunch of problems, the classloaders likely being the biggest one
though.
> Indeed, let's take an example. Let's assume that I have a service A in
> webappsA and a service B in webAppsB. As far as I understood looking at the
> source code, the webappsA class loader will contain it's own list of CXF
> servers with one instance of ServerImpl for the services A and the webappsB
> will contain also it's own list of CXF servers and this list will contain
> only the server of the service B.
>
> The Coloc interceptor check the coloc feature by looking inside the Server
> list a corresponding server but it my case, for instance, if the coloc
> feature is requested for the service A to contact B, the webappsA class
> loader will never find the Server B as it's in the webapssB classloader
> only.
>
> Do you know how I can manage it? I will try to move some jars inside the
> common webapps but I wonder if I will no break something....
You would need to have all the CXF jars into the share/lib dir as well as the
jars that contain all the classes and interfaces that would be shared. If
the types are not shared, they would also end up in different classloaders and
thus not shareable.
One that is all set, you would likely need to write another java object (also
placed in the share/lib area) that would implement the ServerRegistry
interface and replace the default ServerRegistry of the bus with that.
Likely, the best approach is to subclass our ServerRegistryImpl and just
override the getServers() call to return a full collection. Thus, something
like: (pseudo code, haven't compiled it or anything)
public class MyServerRegistry extends ServerRegistryImpl {
static List<WeakReference<MyServerRegistry>> allRegistries
= new LinkedList<WeakReference<MyServerRegistry>>();
public MyServerRegister(Bus b) {
super(b);
synchronized(allRegistries) {
allRegistries.add(new WeakReference<MyServerRegistry>(this));
}
}
//return the list of servers local to this bus/app
public List<Server> getLocalServers() {
return super.getServers();
}
public List<Server> getServers() {
List<Server> ret = new ArrayList<Server>();
synchronized (allRegistries) {
ListIterator<WeakReference<MyServerRegistry>> iterator
= allRegistries.listIterator();
while (iterator.hasNext()) {
WeakReference<MyServerRegistry> b = iterator.next();
MyServerRegistry r = b.get();
if (r == null) {
//it's been garbage collected, remove the reference
iterator.remove();
} else {
ret.addAll(r.getLocalServers());
}
}
}
return ret;
}
You can then register that in your spring config via:
<bean id="org.apache.cxf.endpoint.ServerRegistry"
class=".....MyServerRegistry"
lazy-init="false">
<constructor-arg ref="cxf"/>
</bean>
> I want to use the coloc feature in order to give really quick access to
> sensitive methods (that I cannot provide as jar because of a lot of
> configuration/security issues) to the services. Do you see another way to
> do it?
The above should do it.
Dan
>
> All the best,
> Jerome
>
> --
> View this message in context:
> http://cxf.547215.n5.nabble.com/Coloc-Tomcat-webapps-tp3873140p3873140.htm
> l Sent from the cxf-user mailing list archive at Nabble.com.
--
Daniel Kulp
dkulp@apache.org
http://dankulp.com/blog
Talend - http://www.talend.com