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Патч: 0001-Fix-installer-plugin-loading.patch
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From 0fd7b0d19bd96456292585e883e3ba2ebbaf579b Mon Sep 17 00:00:00 2001
From: Mikolaj Izdebski <mizdebsk@redhat.com>
Date: Wed, 21 Jun 2017 10:21:10 +0200
Subject: [PATCH] Fix installer plugin loading
---
.../install/impl/ArtifactInstallerFactory.java | 97 ++++++--
.../tools/install/impl/IsolatedClassRealm.java | 245 +++++++++++++++++++++
2 files changed, 320 insertions(+), 22 deletions(-)
create mode 100644 xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/IsolatedClassRealm.java
diff --git a/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/ArtifactInstallerFactory.java b/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/ArtifactInstallerFactory.java
index 7a80571..e6a9a2d 100644
--- a/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/ArtifactInstallerFactory.java
+++ b/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/ArtifactInstallerFactory.java
@@ -15,8 +15,17 @@
*/
package org.fedoraproject.xmvn.tools.install.impl;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
import java.util.Arrays;
-import java.util.Collection;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
import java.util.Properties;
import org.slf4j.Logger;
@@ -35,49 +44,93 @@ class ArtifactInstallerFactory
private final ArtifactInstaller defaultArtifactInstaller;
- private final ArtifactInstaller eclipseArtifactInstaller;
+ private final IsolatedClassRealm pluginRealm;
- private static ArtifactInstaller loadPlugin( String className )
+ private final Map<String, ArtifactInstaller> cachedPluginsByType = new LinkedHashMap<>();
+
+ private final Map<String, ArtifactInstaller> cachedPluginsByImplClass = new LinkedHashMap<>();
+
+ private ArtifactInstaller tryLoadPlugin( String type )
{+ if ( cachedPluginsByType.containsKey( type ) )
+ return cachedPluginsByType.get( type );
+
try
{- return (ArtifactInstaller) ArtifactInstallerFactory.class.getClassLoader().loadClass( className ).newInstance();
+ String resourceName = ArtifactInstaller.class.getCanonicalName() + "/" + type;
+ InputStream resourceStream = pluginRealm != null ? pluginRealm.getResourceAsStream( resourceName ) : null;
+ if ( resourceStream == null )
+ {+ logger.debug( "No XMvn Installer plugin found for packaging type {}", type );+ cachedPluginsByType.put( type, null );
+ return null;
+ }
+
+ String pluginImplClass;
+ try ( BufferedReader resourceReader = new BufferedReader( new InputStreamReader( resourceStream ) ) )
+ {+ pluginImplClass = resourceReader.readLine();
+ }
+
+ ArtifactInstaller pluggedInInstaller = cachedPluginsByImplClass.get( pluginImplClass );
+ if ( pluggedInInstaller == null )
+ {+ pluggedInInstaller = (ArtifactInstaller) pluginRealm.loadClass( pluginImplClass ).newInstance();
+ cachedPluginsByImplClass.put( pluginImplClass, pluggedInInstaller );
+ }
+
+ cachedPluginsByType.put( type, pluggedInInstaller );
+ return pluggedInInstaller;
}
- catch ( ReflectiveOperationException e )
+ catch ( IOException | ReflectiveOperationException e )
{- return null;
+ throw new RuntimeException( "Unable to load XMvn Installer plugin for packaging type " + type, e );
}
}
public ArtifactInstallerFactory( Configurator configurator )
{defaultArtifactInstaller = new DefaultArtifactInstaller( configurator );
- // FIXME Don't hardcode plugin class name
- eclipseArtifactInstaller = loadPlugin( "org.fedoraproject.p2.xmvn.EclipseArtifactInstaller" );
+
+ Path pluginDir = Paths.get( "/usr/share/xmvn/lib/installer" );
+ if ( Files.isDirectory( pluginDir ) )
+ {+ ClassLoader parentClassLoader = ArtifactInstallerFactory.class.getClassLoader();
+ pluginRealm = new IsolatedClassRealm( parentClassLoader );
+ pluginRealm.addJarDirectory( pluginDir );
+ PLUGIN_IMPORTS.forEach( pluginRealm::importPackage );
+ }
+ else
+ {+ pluginRealm = null;
+ }
}
/**
- * List of Tycho pacgkaging types.
+ * List of packages imported from XMvn Installer class loader to plug-in realms.
*/
- private static final Collection<String> ECLIPSE_PACKAGING_TYPES = Arrays.asList( "eclipse-plugin", //
- "eclipse-test-plugin", //
- "eclipse-feature", //
- "eclipse-repository", //
- "eclipse-application", //
- "eclipse-update-site", //
- "eclipse-target-definition" );
+ private static final List<String> PLUGIN_IMPORTS = Arrays.asList( // XMvn API
+ "org.fedoraproject.xmvn.artifact", //
+ "org.fedoraproject.xmvn.config", //
+ "org.fedoraproject.xmvn.deployer", //
+ "org.fedoraproject.xmvn.locator", //
+ "org.fedoraproject.xmvn.metadata", //
+ "org.fedoraproject.xmvn.resolver", //
+ // XMvn Installer SPI
+ "org.fedoraproject.xmvn.tools.install", //
+ // SLF4J API
+ "org.slf4j" //
+ );
@SuppressWarnings( "unused" )
public ArtifactInstaller getInstallerFor( Artifact artifact, Properties properties )
{String type = properties.getProperty( "type" );
- if ( type != null && ECLIPSE_PACKAGING_TYPES.contains( type ) )
+ if ( type != null )
{- if ( eclipseArtifactInstaller != null )
- return eclipseArtifactInstaller;
-
- logger.error( "Unable to load XMvn P2 plugin, Eclipse artifact installation will be impossible" );
- throw new RuntimeException( "Unable to load XMvn P2 plugin" );
+ ArtifactInstaller pluggedInInstaller = tryLoadPlugin( type );
+ if ( pluggedInInstaller != null )
+ return pluggedInInstaller;
}
return defaultArtifactInstaller;
diff --git a/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/IsolatedClassRealm.java b/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/IsolatedClassRealm.java
new file mode 100644
index 0000000..3324604
--- /dev/null
+++ b/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/IsolatedClassRealm.java
@@ -0,0 +1,245 @@
+/*-
+ * Copyright (c) 2014-2017 Red Hat, Inc.
+ *
+ * Licensed 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.fedoraproject.xmvn.tools.install.impl;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashSet;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+/**
+ * A generic, isolated class loader.
+ * <p>
+ * This class loader has its own classpath, separate from the primary Java classpath. It has a parent class loader, to
+ * which it delegates loading a set of imported classes. All other classes are loaded from its own classpath.
+ *
+ * @author Mikolaj Izdebski
+ */
+class IsolatedClassRealm
+ extends URLClassLoader
+{+ static
+ {+ registerAsParallelCapable();
+ }
+
+ private final ClassLoader parent;
+
+ private final Set<String> imports = new HashSet<>();
+
+ private final Set<String> importsAll = new HashSet<>();
+
+ public IsolatedClassRealm( ClassLoader parent )
+ {+ super( new URL[0], null );
+ this.parent = parent;
+ }
+
+ public void addJar( Path jar )
+ {+ try
+ {+ addURL( jar.toUri().toURL() );
+ }
+ catch ( MalformedURLException e )
+ {+ throw new RuntimeException( e );
+ }
+ }
+
+ public void addJarDirectory( Path dir )
+ {+ try ( DirectoryStream<Path> stream = Files.newDirectoryStream( dir, "*.jar" ) )
+ {+ for ( Path path : stream )
+ {+ addJar( path );
+ }
+ }
+ catch ( IOException e )
+ {+ throw new RuntimeException( e );
+ }
+ }
+
+ public void importPackage( String packageName )
+ {+ imports.add( packageName );
+ }
+
+ public void importAllPackages( String packageName )
+ {+ importsAll.add( packageName );
+ }
+
+ boolean isImported( String name )
+ {+ int index = name.lastIndexOf( '/' );
+
+ if ( index >= 0 )
+ {+ name = name.replace( '/', '.' );
+ }
+ else
+ {+ index = Math.max( name.lastIndexOf( '.' ), 0 );
+ }
+
+ String namespace = name.substring( 0, index );
+
+ if ( imports.contains( namespace ) )
+ return true;
+
+ while ( !namespace.isEmpty() )
+ {+ if ( importsAll.contains( namespace ) )
+ return true;
+
+ namespace = namespace.substring( 0, Math.max( namespace.lastIndexOf( '.' ), 0 ) );
+ }
+
+ return false;
+ }
+
+ @Override
+ public Class<?> loadClass( String name )
+ throws ClassNotFoundException
+ {+ return loadClass( name, false );
+ }
+
+ @Override
+ protected Class<?> loadClass( String name, boolean resolve )
+ throws ClassNotFoundException
+ {+ if ( isImported( name ) )
+ {+ try
+ {+ return parent.loadClass( name );
+ }
+ catch ( ClassNotFoundException e )
+ {+ }
+ }
+
+ try
+ {+ return super.loadClass( name, resolve );
+ }
+ catch ( ClassNotFoundException e )
+ {+ }
+
+ synchronized ( getClassLoadingLock( name ) )
+ {+ Class<?> clazz = findLoadedClass( name );
+ if ( clazz != null )
+ {+ return clazz;
+ }
+
+ try
+ {+ return super.findClass( name );
+ }
+ catch ( ClassNotFoundException e )
+ {+ }
+ }
+
+ throw new ClassNotFoundException( name );
+ }
+
+ @Override
+ protected Class<?> findClass( String name )
+ throws ClassNotFoundException
+ {+ throw new ClassNotFoundException( name );
+ }
+
+ @Override
+ public URL getResource( String name )
+ {+ if ( isImported( name ) )
+ {+ URL resource = parent.getResource( name );
+ if ( resource != null )
+ {+ return resource;
+ }
+ }
+
+ URL resource = super.getResource( name );
+ if ( resource != null )
+ {+ return resource;
+ }
+
+ resource = super.findResource( name );
+ if ( resource != null )
+ {+ return resource;
+ }
+
+ return null;
+ }
+
+ @Override
+ public Enumeration<URL> getResources( String name )
+ throws IOException
+ {+ Collection<URL> resources = new LinkedHashSet<>();
+
+ if ( isImported( name ) )
+ {+ try
+ {+ resources.addAll( Collections.list( parent.getResources( name ) ) );
+ }
+ catch ( IOException e )
+ {+ }
+ }
+
+ try
+ {+ resources.addAll( Collections.list( super.getResources( name ) ) );
+ }
+ catch ( IOException e )
+ {+ }
+
+ try
+ {+ resources.addAll( Collections.list( super.findResources( name ) ) );
+ }
+ catch ( IOException e )
+ {+ }
+
+ return Collections.enumeration( resources );
+ }
+}
--
2.9.3