On Jan 20, 2010, at 11:38 AM, Jarek Gawor wrote:
Hey,
For last few days I've been looking into getting the rfc66 extender
going in Geronimo but I ran into a problem. As previously mentioned on
this list, the idea for the extender was to call the Tomcat/Jetty
ModuleBuilders with a bundle as an input and once the deployment
process was done start the generated configuration. All without
creating any additional temporary or permanent bundles.
Because we don't have a single classloader that can load all the
gbeans within the configuration, David Jencks added a special
"classSource" attribute to GBeanData which can be used to figure out
the right Bundle to load the gbean class. Now, since we use Java
serialization to save and load gbeans, we actually need to set the
right classloader when we deserialize the gbean. That is, during
deserialization as soon as we read the "classSource" we need to lookup
and set the right classloader and then read the rest of the gbean
data. This should (and seems to) work when all the attributes of the
gbean are accessible from the same classloader. But what about if the
gbean has some attribute with some values from different classloaders?
For example, the Map object we build for jndi context can contain
objects from different classloaders. I'm not exactly sure what to do
about it. Although maybe having a custom ObjectOutputStream with
annotateClass() method that saves "classSource" type of info for each
unique class might work. Ideas?
Also, I'm dealing with lots of classloader issues since there is no
single classloader that load all the gbean classes and module classes.
A lot of Geronimo and other code assumes a single classloader and
resolving these problems is time consuming and not very fun (although
probably good in long term). So I'm wondering if we can still somehow
assemble a single classloader in the extender. For example, the
http://www.osgi.org/blog/2008/08/classy-solutions-to-tricky-proxies.html
post shows a classloader that delegates a number of different bundles.
Maybe we could use that in Geronimo especially since we can figure out
the bundles needed from the configuration environment information.
Thoughts?
Jarek
I think that we are either going to load the gbean from the
classSource bundle or from the configuration's bundle. Maybe
sometimes we need to mix them... not sure. Anyway I think we can
modify the ObjectInputStreamExt to look in the classSource's bundle or
in the bundle as in the attached patch. I chatted with Jarek a bit on
irc and I think he is thinking of writing the bundle symbolic name
into the output stream and using package admin to look it up again.
I'm a little worried with this approach that we may be mixing too much
osgi into geronimo. If we had a blueprint namespace handler I think
we'd be able to load the classes in the namespace handler rather than
needing to rely on something that is really like requireBundle. So,
my approach is somewhat similar but uses geronimo techniques rather
than osgi techniques. I think this might be appropriate since we are
in fact loading gbeans.
my patch compiles but I haven't tried it yet.
thoughts?
david jencks
Index: src/test/java/org/apache/geronimo/kernel/mock/
MockConfigurationManager.java
===================================================================
--- src/test/java/org/apache/geronimo/kernel/mock/
MockConfigurationManager.java (revision 901109)
+++ src/test/java/org/apache/geronimo/kernel/mock/
MockConfigurationManager.java (working copy)
@@ -122,7 +122,7 @@
public LifecycleResults loadConfiguration(ConfigurationData
configurationData, LifecycleMonitor monitor) throws
NoSuchConfigException, LifecycleException {
try {
Artifact configId =
configurationData.getEnvironment().getConfigId();
- Configuration configuration = new
Configuration(configurationData, new DependencyNode(configId, null,
null), null, null, null);
+ Configuration configuration = new
Configuration(configurationData, new DependencyNode(configId, null,
null), null, null, null, null);
configurations.put(configId, configuration);
} catch (InvalidConfigException e) {
Index: src/test/java/org/apache/geronimo/kernel/config/
ConfigurationUtilTest.java
===================================================================
--- src/test/java/org/apache/geronimo/kernel/config/
ConfigurationUtilTest.java (revision 901109)
+++ src/test/java/org/apache/geronimo/kernel/config/
ConfigurationUtilTest.java (working copy)
@@ -74,10 +74,10 @@
private void assertEquals(ConfigurationData data,
ConfigurationData configurationData) throws InvalidConfigException {
List gbeans;
- gbeans = data.getGBeans(bundleContext.getBundle());
+ gbeans = data.getGBeans(bundleContext.getBundle(), null);
assertEquals(configurationData.getId(), data.getId());
ConfigurationData data3 = (ConfigurationData)
data.getChildConfigurations().get("testmodule");
- gbeans = data3.getGBeans(bundleContext.getBundle());
+ gbeans = data3.getGBeans(bundleContext.getBundle(), null);
assertEquals(new QName("namespaceURI", "localPart"),
((GBeanData)gbeans.get(0)).getAttribute("someObject"));
}
Index: src/main/java/org/apache/geronimo/kernel/
ObjectInputStreamExt.java
===================================================================
--- src/main/java/org/apache/geronimo/kernel/
ObjectInputStreamExt.java (revision 901109)
+++ src/main/java/org/apache/geronimo/kernel/
ObjectInputStreamExt.java (working copy)
@@ -22,6 +22,9 @@
import java.io.ObjectStreamClass;
import java.lang.reflect.Proxy;
+import org.apache.geronimo.kernel.config.Configuration;
+import org.apache.geronimo.kernel.config.InvalidConfigException;
+import org.apache.geronimo.kernel.repository.Artifact;
import org.osgi.framework.Bundle;
/**
@@ -29,19 +32,41 @@
*/
public class ObjectInputStreamExt extends ObjectInputStream {
- private Bundle bundle;
+ private final Bundle bundle;
+ private final Kernel kernel;
+ private Bundle sourceBundle;
- public ObjectInputStreamExt(InputStream in, Bundle bundle) throws
IOException {
+ public ObjectInputStreamExt(InputStream in, Bundle bundle, Kernel
kernel) throws IOException {
super(in);
this.bundle = bundle;
+ this.kernel = kernel;
}
+ public void setClassSource(Artifact classSource) throws
ClassNotFoundException {
+ if (classSource != null) {
+ try {
+ Configuration configuration = (Configuration)
kernel
.getGBean(Configuration.getConfigurationAbstractName(classSource));
+ sourceBundle = configuration.getBundle();
+ } catch (GBeanNotFoundException e) {
+ throw new ClassNotFoundException("Could not locate
Configuration to deserialize", e);
+ } catch (InvalidConfigException e) {
+ throw new ClassNotFoundException("Could not identify
Configuration to deserialize", e);
+ }
+ } else {
+ sourceBundle = null;
+ }
+ }
+
protected Class resolveClass(ObjectStreamClass classDesc) throws
IOException, ClassNotFoundException {
+ if (sourceBundle != null) {
+ return ClassLoading.loadClass(classDesc.getName(), bundle);
+ }
return ClassLoading.loadClass(classDesc.getName(), bundle);
}
//see http://www.osgi.org/blog/2008/08/classy-solutions-to-tricky-proxies.html
//currently broken
+
protected Class resolveProxyClass(String[] interfaces) throws
IOException, ClassNotFoundException {
Class[] cinterfaces = new Class[interfaces.length];
for (int i = 0; i < interfaces.length; i++)
Index: src/main/java/org/apache/geronimo/kernel/config/
ConfigurationData.java
===================================================================
--- src/main/java/org/apache/geronimo/kernel/config/
ConfigurationData.java (revision 901109)
+++ src/main/java/org/apache/geronimo/kernel/config/
ConfigurationData.java (working copy)
@@ -28,6 +28,7 @@
import org.apache.geronimo.gbean.GBeanData;
import org.apache.geronimo.gbean.GBeanInfo;
+import org.apache.geronimo.kernel.Kernel;
import org.apache.geronimo.kernel.Naming;
import org.apache.geronimo.kernel.repository.Artifact;
import org.apache.geronimo.kernel.repository.Environment;
@@ -179,9 +180,9 @@
return environment.getManifest();
}
- public List<GBeanData> getGBeans(Bundle bundle) throws
InvalidConfigException {
+ public List<GBeanData> getGBeans(Bundle bundle, Kernel kernel)
throws InvalidConfigException {
if (bundle == null) throw new NullPointerException("bundle
is null");
- List<GBeanData> gbeans = gbeanState.getGBeans(bundle);
+ List<GBeanData> gbeans = gbeanState.getGBeans(bundle, kernel);
if (null == configurationDataTransformer) {
return gbeans;
}
Index: src/main/java/org/apache/geronimo/kernel/config/xstream/
XStreamGBeanState.java
===================================================================
--- src/main/java/org/apache/geronimo/kernel/config/xstream/
XStreamGBeanState.java (revision 901109)
+++ src/main/java/org/apache/geronimo/kernel/config/xstream/
XStreamGBeanState.java (working copy)
@@ -32,6 +32,7 @@
import org.apache.geronimo.gbean.AbstractName;
import org.apache.geronimo.gbean.GBeanData;
import org.apache.geronimo.gbean.GBeanInfo;
+import org.apache.geronimo.kernel.Kernel;
import org.apache.geronimo.kernel.Naming;
import org.apache.geronimo.kernel.util.XmlUtil;
import org.apache.geronimo.kernel.config.InvalidConfigException;
@@ -73,7 +74,7 @@
return gbeanState;
}
- public List<GBeanData> getGBeans(Bundle bundle) throws
InvalidConfigException {
+ public List<GBeanData> getGBeans(Bundle bundle, Kernel kernel)
throws InvalidConfigException {
if (gbeanState == null) {
return Collections.unmodifiableList(gbeans);
}
Index: src/main/java/org/apache/geronimo/kernel/config/
Configuration.java
===================================================================
--- src/main/java/org/apache/geronimo/kernel/config/
Configuration.java (revision 901109)
+++ src/main/java/org/apache/geronimo/kernel/config/
Configuration.java (working copy)
@@ -38,8 +38,11 @@
import org.apache.geronimo.gbean.ReferencePatterns;
import org.apache.geronimo.gbean.annotation.GBean;
import org.apache.geronimo.gbean.annotation.ParamAttribute;
+import org.apache.geronimo.gbean.annotation.ParamSpecial;
+import org.apache.geronimo.gbean.annotation.SpecialAttributeType;
import org.apache.geronimo.kernel.GBeanAlreadyExistsException;
import org.apache.geronimo.kernel.GBeanNotFoundException;
+import org.apache.geronimo.kernel.Kernel;
import org.apache.geronimo.kernel.Naming;
import org.apache.geronimo.kernel.repository.Artifact;
import org.apache.geronimo.kernel.repository.Environment;
@@ -86,6 +89,7 @@
* Converts an Artifact to an AbstractName for a configuration.
Does not
* validate that this is a reasonable or resolved Artifact, or
that it
* corresponds to an actual Configuration.
+ *
* @param configId id for configuration
* @return abstract name constructed from supplied id
* @throws InvalidConfigException if the ObjectName could not be
constructed
@@ -167,23 +171,24 @@
/**
* Creates a configuration.
+ * <p/>
+ * // * @param classLoaderHolder Classloaders for this
configuration
*
-// * @param classLoaderHolder Classloaders for this configuration
- * @param configurationData the module type, environment and
classpath of the configuration
- * @param dependencyNode Class and Service parent ids
- * @param allServiceParents ordered list of transitive closure of
service parents for gbean searches
- * @param attributeStore Customization info for gbeans
+ * @param configurationData the module type, environment and
classpath of the configuration
+ * @param dependencyNode Class and Service parent ids
+ * @param allServiceParents ordered list of transitive
closure of service parents for gbean searches
+ * @param attributeStore Customization info for gbeans
* @param configurationResolver (there should be a better way)
Where this configuration is actually located in file system
+ * @param kernel
* @throws InvalidConfigException if this configuration turns
out to have a problem.
*/
public Configuration(
-// @ParamAttribute(name = "classLoaderHolder")
ClassLoaderHolder classLoaderHolder,
@ParamAttribute(name = "configurationData")
ConfigurationData configurationData,
@ParamAttribute(name = "dependencyNode") DependencyNode
dependencyNode,
@ParamAttribute(name = "allServiceParents")
List<Configuration> allServiceParents,
@ParamAttribute(name = "attributeStore")
ManageableAttributeStore attributeStore,
- @ParamAttribute(name = "configurationResolver")
ConfigurationResolver configurationResolver) throws
InvalidConfigException {
-// if (classLoaderHolder == null) throw new
NullPointerException("classLoaders are null");
+ @ParamAttribute(name = "configurationResolver")
ConfigurationResolver configurationResolver,
+ @ParamSpecial(type = SpecialAttributeType.kernel) Kernel
kernel) throws InvalidConfigException {
if (configurationData == null) throw new
NullPointerException("configurationData is null");
// this.classLoaderHolder = classLoaderHolder;
@@ -199,7 +204,7 @@
// Deserialize the GBeans in the configurationData
Bundle bundle =
configurationData.getBundleContext().getBundle();
- Collection<GBeanData> gbeans =
configurationData.getGBeans(bundle);
+ Collection<GBeanData> gbeans =
configurationData.getGBeans(bundle, kernel);
if (attributeStore != null) {
gbeans =
attributeStore.applyOverrides(dependencyNode.getId(), gbeans, bundle);
}
@@ -221,6 +226,7 @@
/**
* Add a contained configuration, such as for a war inside an ear
+ *
* @param child contained configuration
*/
void addChild(Configuration child) {
@@ -311,6 +317,7 @@
/**
* Provide a way to locate where this configuration is for web
apps and persistence units
+ *
* @return the ConfigurationResolver for this configuration
*/
public ConfigurationResolver getConfigurationResolver() {
Index: src/main/java/org/apache/geronimo/kernel/config/GBeanState.java
===================================================================
--- src/main/java/org/apache/geronimo/kernel/config/
GBeanState.java (revision 901109)
+++ src/main/java/org/apache/geronimo/kernel/config/
GBeanState.java (working copy)
@@ -20,6 +20,7 @@
import org.apache.geronimo.gbean.GBeanData;
import org.apache.geronimo.gbean.GBeanInfo;
+import org.apache.geronimo.kernel.Kernel;
import org.apache.geronimo.kernel.Naming;
import org.apache.geronimo.kernel.repository.Environment;
import org.osgi.framework.Bundle;
@@ -28,7 +29,7 @@
* @version $Rev$ $Date$
*/
public interface GBeanState {
- List<GBeanData> getGBeans(Bundle bundle) throws
InvalidConfigException;
+ List<GBeanData> getGBeans(Bundle bundle, Kernel kernel) throws
InvalidConfigException;
void addGBean(GBeanData gbeanData);
Index: src/main/java/org/apache/geronimo/kernel/config/
SerializedGBeanState.java
===================================================================
--- src/main/java/org/apache/geronimo/kernel/config/
SerializedGBeanState.java (revision 901109)
+++ src/main/java/org/apache/geronimo/kernel/config/
SerializedGBeanState.java (working copy)
@@ -31,6 +31,7 @@
import org.apache.geronimo.gbean.AbstractName;
import org.apache.geronimo.gbean.GBeanData;
import org.apache.geronimo.gbean.GBeanInfo;
+import org.apache.geronimo.kernel.Kernel;
import org.apache.geronimo.kernel.Naming;
import org.apache.geronimo.kernel.ObjectInputStreamExt;
import org.apache.geronimo.kernel.repository.Environment;
@@ -58,11 +59,11 @@
}
}
- public List<GBeanData> getGBeans(Bundle bundle) throws
InvalidConfigException {
+ public List<GBeanData> getGBeans(Bundle bundle, Kernel kernel)
throws InvalidConfigException {
if (gbeanState == null) {
return Collections.unmodifiableList(gbeans);
}
- gbeans.addAll(loadGBeans(gbeanState, bundle));
+ gbeans.addAll(loadGBeans(gbeanState, bundle, kernel));
return Collections.unmodifiableList(gbeans);
}
@@ -110,7 +111,7 @@
stream.defaultWriteObject();
}
- private static List<GBeanData> loadGBeans(byte[] gbeanState,
Bundle bundle) throws InvalidConfigException {
+ private static List<GBeanData> loadGBeans(byte[] gbeanState,
Bundle bundle, Kernel kernel) throws InvalidConfigException {
List<GBeanData> gbeans = new ArrayList<GBeanData>();
if (gbeanState != null && gbeanState.length > 0) {
// Set the thread context classloader so deserializing
classes can grab the cl from the thread
@@ -118,7 +119,7 @@
try {
//
Thread.currentThread().setContextClassLoader(classLoader);
- ObjectInputStream ois = new ObjectInputStreamExt(new
ByteArrayInputStream(gbeanState), bundle);
+ ObjectInputStream ois = new ObjectInputStreamExt(new
ByteArrayInputStream(gbeanState), bundle, kernel);
try {
while (true) {
GBeanData gbeanData = new GBeanData();
Index: src/main/java/org/apache/geronimo/kernel/config/
SimpleConfigurationManager.java
===================================================================
--- src/main/java/org/apache/geronimo/kernel/config/
SimpleConfigurationManager.java (revision 901109)
+++ src/main/java/org/apache/geronimo/kernel/config/
SimpleConfigurationManager.java (working copy)
@@ -424,7 +424,7 @@
List<Configuration> allServiceParents =
buildAllServiceParents(null, dependencyNode);
- Configuration configuration = new
Configuration(configurationData, dependencyNode, allServiceParents,
null, configurationResolver);
+ Configuration configuration = new
Configuration(configurationData, dependencyNode, allServiceParents,
null, configurationResolver, null);
configuration.doStart();
//TODO why???
resolvedParentIds.add(configuration.getId());
@@ -1478,7 +1478,8 @@
*/
private void applyOverrides(Configuration configuration) throws
InvalidConfigException {
Bundle bundle = configuration.getBundle();
- Collection<GBeanData> gbeans =
configuration.getConfigurationData().getGBeans(bundle);
+ //TODO OSGI we might need a kernel here?
+ Collection<GBeanData> gbeans =
configuration.getConfigurationData().getGBeans(bundle, null);
if (configuration.getManageableAttributeStore() != null) {
configuration
.getManageableAttributeStore().applyOverrides(configuration.getId(),
gbeans,
bundle);
Index: src/main/java/org/apache/geronimo/gbean/GBeanData.java
===================================================================
--- src/main/java/org/apache/geronimo/gbean/GBeanData.java
(revision 901109)
+++ src/main/java/org/apache/geronimo/gbean/GBeanData.java
(working copy)
@@ -28,6 +28,7 @@
import java.util.Set;
import org.apache.geronimo.gbean.annotation.EncryptionSetting;
+import org.apache.geronimo.kernel.ObjectInputStreamExt;
import org.apache.geronimo.kernel.repository.Artifact;
/**
@@ -419,6 +420,9 @@
protected void readClassSource(ObjectInput in) throws
ClassNotFoundException, IOException {
classSource = (Artifact) in.readObject();
+ if (in instanceof ObjectInputStreamExt) {
+ ((ObjectInputStreamExt)in).setClassSource(classSource);
+ }
}
}
