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The following commit(s) were added to refs/heads/master by this push:
new 14ee3ef [OWB-1375] first step to use privateLookup for java 16 and
drop --add-exports need (still need to optimize the defineClass strategy -
ensure it is adapted to the runtime and does not rely on fallbacks)
14ee3ef is described below
commit 14ee3ef408c8c1b9962d91f6cb4f882ec61eb1d3
Author: Romain Manni-Bucau <rmannibu...@gmail.com>
AuthorDate: Mon Mar 15 17:06:38 2021 +0100
[OWB-1375] first step to use privateLookup for java 16 and drop
--add-exports need (still need to optimize the defineClass strategy - ensure it
is adapted to the runtime and does not rely on fallbacks)
---
pom.xml | 19 -------
.../webbeans/custom/CustomProxyPackageMarker.java | 23 ++++++++
.../webbeans/proxy/AbstractProxyFactory.java | 4 +-
.../java/org/apache/webbeans/proxy/Unsafe.java | 65 ++++++++++++++++++++--
4 files changed, 84 insertions(+), 27 deletions(-)
diff --git a/pom.xml b/pom.xml
index 2ff13a5..54a58ac 100644
--- a/pom.xml
+++ b/pom.xml
@@ -848,25 +848,6 @@
<profiles>
<profile>
- <id>java16-hacks</id>
- <activation>
- <jdk>16</jdk>
- </activation>
- <build>
- <plugins>
- <plugin>
- <groupId>org.apache.maven.plugins</groupId>
- <artifactId>maven-surefire-plugin</artifactId>
- <configuration>
- <argLine>--add-exports
java.base/jdk.internal.misc=ALL-UNNAMED</argLine>
- </configuration>
-
- </plugin>
- </plugins>
- </build>
- </profile>
-
- <profile>
<id>reporting</id>
<activation>
<property>
diff --git
a/webbeans-impl/src/main/java/org/apache/webbeans/custom/CustomProxyPackageMarker.java
b/webbeans-impl/src/main/java/org/apache/webbeans/custom/CustomProxyPackageMarker.java
new file mode 100644
index 0000000..8a14770
--- /dev/null
+++
b/webbeans-impl/src/main/java/org/apache/webbeans/custom/CustomProxyPackageMarker.java
@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.webbeans.custom;
+
+public interface CustomProxyPackageMarker
+{
+}
diff --git
a/webbeans-impl/src/main/java/org/apache/webbeans/proxy/AbstractProxyFactory.java
b/webbeans-impl/src/main/java/org/apache/webbeans/proxy/AbstractProxyFactory.java
index f66d03b..47c67aa 100644
---
a/webbeans-impl/src/main/java/org/apache/webbeans/proxy/AbstractProxyFactory.java
+++
b/webbeans-impl/src/main/java/org/apache/webbeans/proxy/AbstractProxyFactory.java
@@ -289,7 +289,7 @@ public abstract class AbstractProxyFactory
if (className.startsWith(forbiddenPackagePrefix))
{
- fixedClassName = "org.apache.webbeans.custom." +
className.substring(forbiddenPackagePrefix.length());
+ fixedClassName = "org.apache.webbeans.custom." +
className.substring(className.lastIndexOf('.') + 1);
}
return fixedClassName;
@@ -329,7 +329,7 @@ public abstract class AbstractProxyFactory
{
return definingService.defineAndLoad(proxyClassName, proxyBytes,
classToProxy);
}
- return unsafe.defineAndLoadClass(classLoader, proxyClassName,
proxyBytes);
+ return unsafe.defineAndLoadClass(classLoader, proxyClassName,
proxyBytes, classToProxy);
}
protected <T> T newInstance(final Class<? extends T> proxyClass)
diff --git a/webbeans-impl/src/main/java/org/apache/webbeans/proxy/Unsafe.java
b/webbeans-impl/src/main/java/org/apache/webbeans/proxy/Unsafe.java
index 9beb112..f0b49c3 100644
--- a/webbeans-impl/src/main/java/org/apache/webbeans/proxy/Unsafe.java
+++ b/webbeans-impl/src/main/java/org/apache/webbeans/proxy/Unsafe.java
@@ -18,6 +18,7 @@
*/
package org.apache.webbeans.proxy;
+import java.lang.invoke.MethodHandles;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
@@ -29,6 +30,7 @@ import java.util.concurrent.atomic.AtomicReference;
import java.util.stream.IntStream;
import java.util.stream.Stream;
+import org.apache.webbeans.custom.CustomProxyPackageMarker;
import org.apache.webbeans.exception.ProxyGenerationException;
import org.apache.webbeans.logger.WebBeansLoggerFacade;
@@ -44,6 +46,11 @@ public class Unsafe
private Method unsafeAllocateInstance;
private final AtomicReference<Method> unsafeDefineClass = new
AtomicReference<>();
+ // java 16
+ private volatile Method privateLookup;
+ private Method defineClass;
+ private MethodHandles.Lookup lookup;
+
public Unsafe()
{
final Class<?> unsafeClass = getUnsafeClass();
@@ -130,7 +137,8 @@ public class Unsafe
* The 'defineClass' method on the ClassLoader is protected, thus we need
to invoke it via reflection.
* @return the Class which got loaded in the classloader
*/
- public <T> Class<T> defineAndLoadClass(ClassLoader classLoader, String
proxyName, byte[] proxyBytes)
+ public <T> Class<T> defineAndLoadClass(ClassLoader classLoader, String
proxyName, byte[] proxyBytes,
+ Class<?> parent)
throws ProxyGenerationException
{
Class<?> clazz = classLoader.getClass();
@@ -191,17 +199,62 @@ public class Unsafe
// default error handling
}
}
- throw new ProxyGenerationException(
- le.getMessage() + (isJava16OrMore() ? "\n" +
- "On Java 16 ensure to set --add-exports
java.base/jdk.internal.misc=ALL-UNNAMED on the JVM" : ""),
- le.getCause());
+ throw onProxyGenerationError(le);
}
catch (Throwable e)
{
- throw new ProxyGenerationException(e);
+ // we can also defineHiddenClass but what would be the real point?
let's keep it simple for now
+ try
+ {
+ if (privateLookup == null)
+ {
+ synchronized (this)
+ {
+ if (privateLookup == null)
+ {
+ lookup = MethodHandles.lookup();
+ privateLookup =
MethodHandles.class.getDeclaredMethod(
+ "privateLookupIn", Class.class,
MethodHandles.Lookup.class);
+ defineClass =
lookup.getClass().getMethod("defineClass", byte[].class);
+ }
+ }
+ }
+ final MethodHandles.Lookup lookupInstance =
MethodHandles.Lookup.class.cast(
+ privateLookup.invoke(
+ null,
+
proxyName.startsWith("org.apache.webbeans.custom.") ?
+ CustomProxyPackageMarker.class : parent,
+ lookup));
+ return (Class<T>) defineClass.invoke(lookupInstance,
proxyBytes);
+ }
+ catch (final Exception exception)
+ {
+ if (LinkageError.class.isInstance(exception.getCause()))
+ {
+ try
+ {
+ return (Class<T>) Class.forName(proxyName.replace('/',
'.'), true, classLoader);
+ }
+ catch (ClassNotFoundException ignored)
+ {
+ // default error handling
+ }
+ }
+ final ProxyGenerationException proxyGenerationException =
onProxyGenerationError(e);
+ proxyGenerationException.addSuppressed(exception);
+ throw proxyGenerationException;
+ }
}
}
+ private ProxyGenerationException onProxyGenerationError(final Throwable
throwable)
+ {
+ return new ProxyGenerationException(
+ throwable.getMessage() + (isJava16OrMore() ? "\n" +
+ "On Java 16 ensure to set --add-exports
java.base/jdk.internal.misc=ALL-UNNAMED on the JVM" : ""),
+ throwable.getCause());
+ }
+
private boolean isJava16OrMore()
{
final String version = System.getProperty("java.version", "-1");
