This is an automated email from the ASF dual-hosted git repository.
remm pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/tomcat.git
The following commit(s) were added to refs/heads/master by this push:
new abd1dea Allow casual runtime use of the migration tool
abd1dea is described below
commit abd1dead7804e99e3215e8e01a6cf7448a6b9f36
Author: remm <r...@apache.org>
AuthorDate: Tue Feb 16 17:06:27 2021 +0100
Allow casual runtime use of the migration tool
This allows specifying a profile which will be used for a
ClassFileTransformer. Nothing much to report, it does basic things but
does not do classloader resources or static files.
---
.../apache/catalina/loader/LocalStrings.properties | 1 +
java/org/apache/catalina/loader/WebappLoader.java | 57 ++++++++++++++++++++++
webapps/docs/changelog.xml | 7 +++
webapps/docs/config/loader.xml | 11 +++++
4 files changed, 76 insertions(+)
diff --git a/java/org/apache/catalina/loader/LocalStrings.properties
b/java/org/apache/catalina/loader/LocalStrings.properties
index 7c6c976..dee7e2c 100644
--- a/java/org/apache/catalina/loader/LocalStrings.properties
+++ b/java/org/apache/catalina/loader/LocalStrings.properties
@@ -59,6 +59,7 @@ webappClassLoader.wrongVersion=(unable to load class [{0}])
webappClassLoaderParallel.registrationFailed=Registration of
org.apache.catalina.loader.ParallelWebappClassLoader as capable of loading
classes in parallel failed
webappLoader.deploy=Deploying class repositories to work directory [{0}]
+webappLoader.noJakartaConverter=The Jakarta converter provided by the Tomcat
migration tool could not be loaded
webappLoader.noResources=No resources found for context [{0}]
webappLoader.reloadable=Cannot set reloadable property to [{0}]
webappLoader.setContext.ise=Setting the Context is not permitted while the
loader is started.
diff --git a/java/org/apache/catalina/loader/WebappLoader.java
b/java/org/apache/catalina/loader/WebappLoader.java
index 636c741..b262db9 100644
--- a/java/org/apache/catalina/loader/WebappLoader.java
+++ b/java/org/apache/catalina/loader/WebappLoader.java
@@ -21,7 +21,10 @@ import java.beans.PropertyChangeSupport;
import java.io.File;
import java.io.FilePermission;
import java.io.IOException;
+import java.lang.instrument.ClassFileTransformer;
import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.charset.StandardCharsets;
@@ -87,6 +90,14 @@ public class WebappLoader extends LifecycleMBeanBase
implements Loader{
/**
+ * The profile name which will be used by the converter, or null if not
used.
+ * Any invalid profile value will default to the TOMCAT profile, which
+ * converts all packages used by Tomcat.
+ */
+ private String jakartaConverter = null;
+
+
+ /**
* The Java class name of the ClassLoader implementation to be used.
* This class should extend WebappClassLoaderBase, otherwise, a different
* loader implementation must be used.
@@ -173,6 +184,32 @@ public class WebappLoader extends LifecycleMBeanBase
implements Loader{
/**
+ * @return a non null String if the loader will attempt to use the
+ * Jakarta converter. The String is the name of the profile
+ * used for conversion.
+ */
+ public String getJakartaConverter() {
+ return jakartaConverter;
+ }
+
+
+ /**
+ * Set the Jakarta converter.
+ *
+ * @param jakartaConverter The profile name which will be used by the
converter
+ * Any invalid profile value will default to the TOMCAT profile, which
+ * converts all packages used by Tomcat.
+ */
+ public void setJakartaConverter(String jakartaConverter) {
+ String oldJakartaConverter = this.jakartaConverter;
+ this.jakartaConverter = jakartaConverter;
+ support.firePropertyChange("jakartaConverter",
+ oldJakartaConverter,
+ this.jakartaConverter);
+ }
+
+
+ /**
* @return the ClassLoader class name.
*/
public String getLoaderClass() {
@@ -327,6 +364,26 @@ public class WebappLoader extends LifecycleMBeanBase
implements Loader{
classLoader.setResources(context.getResources());
classLoader.setDelegate(this.delegate);
+ // Set Jakarta class converter
+ if (getJakartaConverter() != null) {
+ try {
+ Class<?> jakartaEnumClass =
Class.forName("org.apache.tomcat.jakartaee.EESpecProfile");
+ Method valueOf = jakartaEnumClass.getMethod("valueOf",
String.class);
+ Object profile = null;
+ try {
+ profile = valueOf.invoke(null, getJakartaConverter());
+ } catch (InvocationTargetException ignored) {
+ profile = valueOf.invoke(null, "TOMCAT");
+ }
+ ClassFileTransformer transformer =
+ (ClassFileTransformer)
Class.forName("org.apache.tomcat.jakartaee.ClassConverter")
+
.getConstructor(jakartaEnumClass).newInstance(profile);
+ classLoader.addTransformer(transformer);
+ } catch (InstantiationException | IllegalAccessException |
ClassNotFoundException e) {
+ log.warn(sm.getString("webappLoader.noJakartaConverter"),
e);
+ }
+ }
+
// Configure our repositories
setClassPath();
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index d120802..4f3fa1c 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -120,6 +120,13 @@
<code>getParallelAnnotationScanning</code> for consistency and ease
of use in JMX descriptors. (remm)
</fix>
+ <update>
+ Allow the loader to directly use the JakartaEE migration tool as a
+ <code>ClassFileTransformer</code> using the
+ <code>jakartaConverter</code> attribute. This only supports javax to
+ jakarta conversion for classes, not for classloader resources or
+ static files. (remm)
+ </update>
</changelog>
</subsection>
<subsection name="Coyote">
diff --git a/webapps/docs/config/loader.xml b/webapps/docs/config/loader.xml
index 16cb521..ddd0d62 100644
--- a/webapps/docs/config/loader.xml
+++ b/webapps/docs/config/loader.xml
@@ -103,6 +103,17 @@
<attributes>
+ <attribute name="jakartaConverter" required="false">
+ <p>If the Tomcat JakartaEE Migration Tool JAR is placed in the Catalina
+ <code>lib</code> folder, this attribute allows using it. The value of
+ the attribute should be the desired profile name for the conversion.
+ If an invalid value is specified, the <code>TOMCAT</code> profile will
+ be used, which includes all javax classes which are used by Tomcat.
+ Only classes will be converted, classloader resources (loaded using
+ <code>getResource</code> or <code>getResourceAsStream</code> will not
+ be processed).</p>
+ </attribute>
+
<attribute name="loaderClass" required="false">
<p>Java class name of the <code>java.lang.ClassLoader</code>
implementation class to use. Custom implementations must extend
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