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Posted to commits@jclouds.apache.org by an...@apache.org on 2016/09/07 03:28:49 UTC

jclouds-karaf git commit: Try to use an OSGi-compliant way of loading JSR 223 script engines

Repository: jclouds-karaf
Updated Branches:
  refs/heads/fix-script-engine [created] 0b99dad1a


Try to use an OSGi-compliant way of loading JSR 223 script engines


Project: http://git-wip-us.apache.org/repos/asf/jclouds-karaf/repo
Commit: http://git-wip-us.apache.org/repos/asf/jclouds-karaf/commit/0b99dad1
Tree: http://git-wip-us.apache.org/repos/asf/jclouds-karaf/tree/0b99dad1
Diff: http://git-wip-us.apache.org/repos/asf/jclouds-karaf/diff/0b99dad1

Branch: refs/heads/fix-script-engine
Commit: 0b99dad1aa7786eaf11028bf91fc1d272c189f0b
Parents: 960a9c7
Author: Andrew Phillips <de...@yahoo.co.uk>
Authored: Tue Sep 6 23:28:19 2016 -0400
Committer: Andrew Phillips <de...@yahoo.co.uk>
Committed: Tue Sep 6 23:28:19 2016 -0400

----------------------------------------------------------------------
 .../commands/table/BasicShellTableFactory.java  |   9 +-
 .../table/internal/OSGiScriptEngine.java        |  79 ++++++
 .../table/internal/OSGiScriptEngineFactory.java |  83 ++++++
 .../table/internal/OSGiScriptEngineManager.java | 272 +++++++++++++++++++
 .../table/internal/ScriptEngineShellTable.java  |  12 +-
 .../OSGI-INF/blueprint/jclouds-commands.xml     |   8 +-
 feature/src/main/resources/feature.xml          |   1 -
 7 files changed, 452 insertions(+), 12 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/jclouds-karaf/blob/0b99dad1/commands/src/main/java/org/jclouds/karaf/commands/table/BasicShellTableFactory.java
----------------------------------------------------------------------
diff --git a/commands/src/main/java/org/jclouds/karaf/commands/table/BasicShellTableFactory.java b/commands/src/main/java/org/jclouds/karaf/commands/table/BasicShellTableFactory.java
index 1769c7f..afb368a 100644
--- a/commands/src/main/java/org/jclouds/karaf/commands/table/BasicShellTableFactory.java
+++ b/commands/src/main/java/org/jclouds/karaf/commands/table/BasicShellTableFactory.java
@@ -24,10 +24,13 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import javax.script.ScriptEngineManager;
+
 /**
  * A basic {@link org.jclouds.karaf.commands.table.ShellTableFactory} implementation which is backed by a {@link Map}.
  */
 public class BasicShellTableFactory implements ShellTableFactory {
+   private ScriptEngineManager scriptEngineManager;
 
    private final Map properties = new HashMap();
   /**
@@ -49,7 +52,7 @@ public class BasicShellTableFactory implements ShellTableFactory {
       List<String> headers =  Arrays.asList(headersValue.split(delimiter));
       List<String> expressions =  Arrays.asList(expressionsValue.split(delimiter));
       List<String> alignments =  Arrays.asList(alignValue.split(delimiter));
-      ShellTable shellTable = new ScriptEngineShellTable(engine);
+      ShellTable shellTable = new ScriptEngineShellTable(scriptEngineManager, engine);
 
       shellTable.setType(type);
       shellTable.setHeaders(headers);
@@ -63,4 +66,8 @@ public class BasicShellTableFactory implements ShellTableFactory {
   public Map getProperties() {
     return properties;
   }
+
+  public void setScriptEngineManager(ScriptEngineManager scriptEngineManager) {
+    this.scriptEngineManager = scriptEngineManager;
+  }
 }

http://git-wip-us.apache.org/repos/asf/jclouds-karaf/blob/0b99dad1/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngine.java
----------------------------------------------------------------------
diff --git a/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngine.java b/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngine.java
new file mode 100644
index 0000000..119cb15
--- /dev/null
+++ b/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngine.java
@@ -0,0 +1,79 @@
+/*
+ *   Copyright 2005 The Apache Software Foundation
+ *
+ *   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.
+ *
+ */
+
+// implementation copied from http://svn.apache.org/repos/asf/felix/trunk/mishell/src/main/java/org/apache/felix/mishell/OSGiScriptEngine.java
+package org.jclouds.karaf.commands.table.internal;
+
+import java.io.Reader;
+
+import javax.script.Bindings;
+import javax.script.ScriptContext;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineFactory;
+import javax.script.ScriptException;
+
+public class OSGiScriptEngine implements ScriptEngine{
+	private ScriptEngine engine;
+	private OSGiScriptEngineFactory factory;
+	public OSGiScriptEngine(ScriptEngine engine, OSGiScriptEngineFactory factory){
+		this.engine=engine;
+		this.factory=factory;
+	}
+	public Bindings createBindings() {
+		return engine.createBindings();
+	}
+	public Object eval(Reader reader, Bindings n) throws ScriptException {
+		return engine.eval(reader, n);
+	}
+	public Object eval(Reader reader, ScriptContext context) throws ScriptException {
+		return engine.eval(reader, context);
+	}
+	public Object eval(Reader reader) throws ScriptException {
+		return engine.eval(reader);
+	}
+	public Object eval(String script, Bindings n) throws ScriptException {
+		return engine.eval(script, n);
+	}
+	public Object eval(String script, ScriptContext context) throws ScriptException {
+		return engine.eval(script, context);
+	}
+	public Object eval(String script) throws ScriptException {
+		return engine.eval(script);
+	}
+	public Object get(String key) {
+		return engine.get(key);
+	}
+	public Bindings getBindings(int scope) {
+		return engine.getBindings(scope);
+	}
+	public ScriptContext getContext() {
+		return engine.getContext();
+	}
+	public ScriptEngineFactory getFactory() {
+		return factory;
+	}
+	public void put(String key, Object value) {
+		engine.put(key, value);
+	}
+	public void setBindings(Bindings bindings, int scope) {
+		engine.setBindings(bindings, scope);
+	}
+	public void setContext(ScriptContext context) {
+		engine.setContext(context);
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/jclouds-karaf/blob/0b99dad1/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngineFactory.java
----------------------------------------------------------------------
diff --git a/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngineFactory.java b/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngineFactory.java
new file mode 100644
index 0000000..0281b82
--- /dev/null
+++ b/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngineFactory.java
@@ -0,0 +1,83 @@
+/*
+ *   Copyright 2005 The Apache Software Foundation
+ *
+ *   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.jclouds.karaf.commands.table.internal;
+
+import java.util.List;
+
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineFactory;
+
+/**
+ * This is a wrapper class for the ScriptEngineFactory class that deals with context class loader issues
+ * It is necessary because engines (at least ruby) use the context classloader to find their resources (i.e., their "native" classes)
+ */
+
+// implementation copied from http://svn.apache.org/repos/asf/felix/trunk/mishell/src/main/java/org/apache/felix/mishell/OSGiScriptEngineFactory.java
+public class OSGiScriptEngineFactory implements ScriptEngineFactory{
+	private ScriptEngineFactory factory;
+	private ClassLoader contextClassLoader;
+	public OSGiScriptEngineFactory (ScriptEngineFactory factory, ClassLoader contextClassLoader){
+		this.factory=factory;
+		this.contextClassLoader=contextClassLoader;
+	}
+	public String getEngineName() {
+		return factory.getEngineName();
+	}
+	public String getEngineVersion() {
+		return factory.getEngineVersion();
+	}
+	public List<String> getExtensions() {
+		return factory.getExtensions();
+	}
+	public String getLanguageName() {
+		return factory.getLanguageName();
+	}
+	public String getLanguageVersion() {
+		return factory.getLanguageVersion();
+	}
+	public String getMethodCallSyntax(String obj, String m, String... args) {
+		return factory.getMethodCallSyntax(obj, m, args);
+	}
+	public List<String> getMimeTypes() {
+		return factory.getMimeTypes();
+	}
+	public List<String> getNames() {
+		return factory.getNames();
+	}
+	public String getOutputStatement(String toDisplay) {
+		return factory.getOutputStatement(toDisplay);
+	}
+	public Object getParameter(String key) {
+		return factory.getParameter(key);
+	}
+	public String getProgram(String... statements) {
+		return factory.getProgram(statements);
+	}
+	public ScriptEngine getScriptEngine() {
+		ScriptEngine engine=null;
+		if(contextClassLoader!=null){
+		ClassLoader old=Thread.currentThread().getContextClassLoader();
+		Thread.currentThread().setContextClassLoader(contextClassLoader);
+		engine=factory.getScriptEngine();
+		Thread.currentThread().setContextClassLoader(old);
+		}
+		else engine=factory.getScriptEngine();
+		return engine;
+	}
+	
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/jclouds-karaf/blob/0b99dad1/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngineManager.java
----------------------------------------------------------------------
diff --git a/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngineManager.java b/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngineManager.java
new file mode 100644
index 0000000..7448b49
--- /dev/null
+++ b/commands/src/main/java/org/jclouds/karaf/commands/table/internal/OSGiScriptEngineManager.java
@@ -0,0 +1,272 @@
+/*
+ *   Copyright 2005 The Apache Software Foundation
+ *
+ *   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.jclouds.karaf.commands.table.internal;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.script.Bindings;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineFactory;
+import javax.script.ScriptEngineManager;
+import javax.script.SimpleBindings;
+
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+
+/**
+ * This class acts as a delegate for all the available ScriptEngineManagers. Unluckily, the standard did not
+ * define it as an interface, so we need to extend it to allow polymorphism. However, no calls to super are used.
+ * It wraps all available ScriptEngineManagers in the OSGi ServicePlatform into a merged ScriptEngineManager.
+ * 
+ * Internally, what this class does is creating ScriptEngineManagers for each bundle 
+ * that contains a ScriptEngineFactory and includes a META-INF/services/javax.script.ScriptEngineFactory file. 
+ * It assumes that the file contains a list of @link ScriptEngineFactory classes. For each bundle, it creates a
+ * ScriptEngineManager, then merges them. @link ScriptEngineFactory objects are wrapped
+ * into @link OSGiScriptEngineFactory objects to deal with problems of context class loader:
+ * Those scripting engines that rely on the ContextClassloader for finding resources need to use this wrapper
+ * and the @link OSGiScriptFactory. Mainly, jruby does.
+ * 
+ * Note that even if no context classloader issues arose, it would still be needed to search manually for the 
+ * factories and either use them directly (losing the mimeType/extension/shortName mechanisms for finding engines
+ * or manually registering them) or still use this class, which would be smarter. In the latter case, 
+ * it would only be needed to remove the hack that temporarily sets the context classloader to the appropriate, 
+ * bundle-related, class loader.
+ * 
+ * Caveats:
+ * <ul><li>
+ * All factories are wrapped with an {@link OSGiScriptEngineFactory}. As Engines are not wrapped,
+ * calls like 
+ * <code>
+ * ScriptEngineManager osgiManager=new OSGiScriptEngineManager(context);<br>
+ * ScriptEngine engine=osgiManager.getEngineByName("ruby");
+ * ScriptEngineFactory factory=engine.getFactory() //this does not return the OSGiFactory wrapper
+ * factory.getScriptEngine(); //this might fail, as it does not use OSGiScriptEngineFactory wrapper
+ * </code>
+ * might result in unexpected errors. Future versions may wrap the ScriptEngine with a OSGiScriptEngine to solve this
+ * issue, but for the moment it is not needed.
+ * </li>
+ * 
+ */
+
+// implementation copied from http://svn.apache.org/repos/asf/felix/trunk/mishell/src/main/java/org/apache/felix/mishell/OSGiScriptEngineManager.java
+public class OSGiScriptEngineManager extends ScriptEngineManager{
+	private Bindings bindings;
+	private Map <ScriptEngineManager, ClassLoader> classLoaders;
+	private BundleContext context;
+	
+	public OSGiScriptEngineManager(BundleContext context){
+		this.context=context;
+		bindings=new SimpleBindings();
+		this.classLoaders=findManagers(context);
+	}
+	/**
+	 * This method is the only one that is visible and not part of the ScriptEngineManager class.
+	 * Its purpose is to find new managers that weren't available before, but keeping the globalScope bindings
+	 * set.
+	 * If you want to clean the bindings you can either get a fresh instance of OSGiScriptManager or
+	 * setting up a new bindings object.
+	 * This can be done with:
+	 * <code>
+	 * ScriptEngineManager manager=new OSGiScriptEngineManager(context);
+	 * (...)//do stuff
+	 * osgiManager=(OSGiScriptEngineManager)manager;//cast to ease reading
+	 * osgiManager.reloadManagers();
+	 * 
+	 * manager.setBindings(new OSGiBindings());//or you can use your own bindings implementation
+	 * 
+	 * </code>   
+	 *
+	 */
+	public void reloadManagers(){
+		this.classLoaders=findManagers(context);
+	}
+	
+	public Object get(String key) {
+		return bindings.get(key);
+	}
+
+	public Bindings getBindings() {
+		return bindings;
+	}
+
+	public ScriptEngine getEngineByExtension(String extension) {
+		//TODO this is a hack to deal with context class loader issues
+		ScriptEngine engine=null;
+		for(ScriptEngineManager manager: classLoaders.keySet()){
+			ClassLoader old=Thread.currentThread().getContextClassLoader();
+			Thread.currentThread().setContextClassLoader(classLoaders.get(manager));
+			engine=manager.getEngineByExtension(extension);
+			Thread.currentThread().setContextClassLoader(old);
+			if (engine!=null) break;
+		}
+ 		return engine;
+	}
+
+	public ScriptEngine getEngineByMimeType(String mimeType) {
+		//TODO this is a hack to deal with context class loader issues
+		ScriptEngine engine=null;
+		for(ScriptEngineManager manager: classLoaders.keySet()){
+			ClassLoader old=Thread.currentThread().getContextClassLoader();
+			Thread.currentThread().setContextClassLoader(classLoaders.get(manager));
+			engine=manager.getEngineByMimeType(mimeType);
+			Thread.currentThread().setContextClassLoader(old);
+			if (engine!=null) break;
+		}
+ 		return engine;
+	}
+
+	public ScriptEngine getEngineByName(String shortName) {
+		//TODO this is a hack to deal with context class loader issues
+		for(ScriptEngineManager manager: classLoaders.keySet()){
+			ClassLoader old=Thread.currentThread().getContextClassLoader();
+			Thread.currentThread().setContextClassLoader(classLoaders.get(manager));
+			ScriptEngine engine=manager.getEngineByName(shortName);
+			Thread.currentThread().setContextClassLoader(old);
+			if (engine!=null){
+				return new OSGiScriptEngine(engine, new OSGiScriptEngineFactory(engine.getFactory(), classLoaders.get(manager)));
+			}
+		}
+		return null;
+	}
+	public List<ScriptEngineFactory> getEngineFactories() {
+		List<ScriptEngineFactory> osgiFactories=new ArrayList<ScriptEngineFactory>();
+		for(ScriptEngineManager engineManager: classLoaders.keySet()){
+			for (ScriptEngineFactory factory : engineManager.getEngineFactories()){
+				osgiFactories.add(new OSGiScriptEngineFactory(factory, classLoaders.get(engineManager)));
+		}
+		}
+		return osgiFactories;
+	}
+
+	public void put(String key, Object value) {
+		bindings.put(key, value);
+	}
+
+	public void registerEngineExtension(String extension, ScriptEngineFactory factory) {
+		for(ScriptEngineManager engineManager: classLoaders.keySet())
+			engineManager.registerEngineExtension(extension, factory);
+	}
+
+	public void registerEngineMimeType(String type, ScriptEngineFactory factory) {
+		for(ScriptEngineManager engineManager: classLoaders.keySet())
+		engineManager.registerEngineMimeType(type, factory);
+	}
+
+	public void registerEngineName(String name, ScriptEngineFactory factory) {
+		for(ScriptEngineManager engineManager: classLoaders.keySet())
+			engineManager.registerEngineName(name, factory);
+	}
+	/**
+	 * Follows the same behavior of @link javax.script.ScriptEngineManager#setBindings(Bindings)
+	 * This means that the same bindings are applied to all the underlying managers.
+	 * @param bindings
+	 */
+	public void setBindings(Bindings bindings) {
+		this.bindings=bindings;
+		for(ScriptEngineManager manager: classLoaders.keySet()){
+			manager.setBindings(bindings);
+		}
+	}
+
+	private Map<ScriptEngineManager, ClassLoader> findManagers(BundleContext context) {
+		Map<ScriptEngineManager, ClassLoader> managers=new HashMap<ScriptEngineManager, ClassLoader>();
+    for (String factoryName : findFactoryCandidates(context)) { 
+      // we do not really need the class, but we need the classloader
+      ClassLoader factoryLoader = tryGetClassLoader(factoryName);
+      if (factoryLoader == null) {
+        continue;
+      }
+      ScriptEngineManager manager = tryCreateScriptEngineManager(factoryName, factoryLoader);
+      if (manager != null) {
+        manager.setBindings(bindings);
+        managers.put(manager, factoryLoader);			
+      }
+    }
+    return managers;
+	}
+	
+	private static ClassLoader tryGetClassLoader(String className) {
+    try {
+      return Class.forName(className).getClassLoader();
+    } catch (ClassNotFoundException exception) {
+      // TODO: use a logger
+      System.err.println("WARN: Tried to load class " +
+        className + " but failed due to: " + exception.getMessage());
+      return null;
+    }	
+	}
+
+	private static ScriptEngineManager tryCreateScriptEngineManager(String factoryName, ClassLoader factoryLoader) {
+    try {
+			return new ScriptEngineManager(factoryLoader);
+    } catch (Exception exception) {
+      // TODO: use a logger
+      System.err.println("WARN: Found ScriptEngineFactory candidate " +
+        factoryName + " but failed to create a factory due to: " + exception.getMessage());
+      return null;
+    }
+	}
+
+	/**
+	 * Iterates through all bundles to get the available @link ScriptEngineFactory classes
+	 * @return the names of the available ScriptEngineFactory classes
+	 * @throws IOException
+	 */
+	private List<String> findFactoryCandidates(BundleContext context) {
+		Bundle[] bundles = context.getBundles();
+		List<String> factoryCandidates = new ArrayList<String>();
+		for (Bundle bundle : bundles) {
+      if (bundle == null) {
+        continue;
+      }
+
+			if (bundle.getSymbolicName().equals("system.bundle")) {
+			  continue;
+			}
+			Enumeration urls = bundle.findEntries("META-INF/services",
+					"javax.script.ScriptEngineFactory", false);
+			if (urls == null) {
+				continue;
+			}
+			
+			while (urls.hasMoreElements()) {
+				URL u = (URL) urls.nextElement();
+				try {
+          BufferedReader reader = new BufferedReader(
+              new InputStreamReader(u.openStream()));
+          String line;
+          while ((line = reader.readLine()) != null) {
+            line = line.trim();
+            // ignore comments and empty lines
+            if (!line.isEmpty() && !line.startsWith("#")) {
+              factoryCandidates.add(line);
+            }
+          }
+        } catch (IOException ignored) {}
+			}
+		}
+		return factoryCandidates;
+	}
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/jclouds-karaf/blob/0b99dad1/commands/src/main/java/org/jclouds/karaf/commands/table/internal/ScriptEngineShellTable.java
----------------------------------------------------------------------
diff --git a/commands/src/main/java/org/jclouds/karaf/commands/table/internal/ScriptEngineShellTable.java b/commands/src/main/java/org/jclouds/karaf/commands/table/internal/ScriptEngineShellTable.java
index 9bce9e6..88ad5b8 100644
--- a/commands/src/main/java/org/jclouds/karaf/commands/table/internal/ScriptEngineShellTable.java
+++ b/commands/src/main/java/org/jclouds/karaf/commands/table/internal/ScriptEngineShellTable.java
@@ -26,18 +26,14 @@ import javax.script.ScriptEngineManager;
  * A shell table implementation that works with groovy expressions.
  */
 public class ScriptEngineShellTable<D extends Object> extends BasicShellTable<D> {
-
-  private final String engine;
-  private final ScriptEngineManager scriptEngineFactory = new ScriptEngineManager();
   private final ScriptEngine scriptEngine;
 
   /**
    * Constructor
    * @param engine
    */
-  public ScriptEngineShellTable(String engine) {
-    this.engine = engine;
-    this.scriptEngine = scriptEngineFactory.getEngineByName(engine);
+  public ScriptEngineShellTable(ScriptEngineManager scriptEngineManager, String engine) {
+    this.scriptEngine = scriptEngineManager.getEngineByName(engine);
   }
 
   /**
@@ -51,9 +47,7 @@ public class ScriptEngineShellTable<D extends Object> extends BasicShellTable<D>
     try {
       scriptEngine.put(getType(), obj);
       result = String.valueOf(scriptEngine.eval(expression));
-    } catch (Exception ex) {
-      //Ignore
-    }
+    } catch (Exception ignored) {}
     return result;
   }
 }

http://git-wip-us.apache.org/repos/asf/jclouds-karaf/blob/0b99dad1/commands/src/main/resources/OSGI-INF/blueprint/jclouds-commands.xml
----------------------------------------------------------------------
diff --git a/commands/src/main/resources/OSGI-INF/blueprint/jclouds-commands.xml b/commands/src/main/resources/OSGI-INF/blueprint/jclouds-commands.xml
index 30e3dd0..092740e 100644
--- a/commands/src/main/resources/OSGI-INF/blueprint/jclouds-commands.xml
+++ b/commands/src/main/resources/OSGI-INF/blueprint/jclouds-commands.xml
@@ -566,7 +566,13 @@ limitations under the License.
 
     <bean id="osFamilyCompleter" class="org.jclouds.karaf.commands.compute.completer.OsFamilyCompleter"/>
 
-  <bean id="shellTableFactory" class="org.jclouds.karaf.commands.table.internal.ManagedShellTableFactory"/>
+  <bean id="osgiScriptEngineManager" class="org.jclouds.karaf.commands.table.internal.OSGiScriptEngineManager">
+      <argument ref="blueprintBundleContext"/>
+  </bean>
+
+  <bean id="shellTableFactory" class="org.jclouds.karaf.commands.table.internal.ManagedShellTableFactory">
+      <property name="scriptEngineManager" ref="osgiScriptEngineManager"/>
+  </bean>
 
   <service ref="shellTableFactory">
       <interfaces>

http://git-wip-us.apache.org/repos/asf/jclouds-karaf/blob/0b99dad1/feature/src/main/resources/feature.xml
----------------------------------------------------------------------
diff --git a/feature/src/main/resources/feature.xml b/feature/src/main/resources/feature.xml
index 44c536d..b53cda8 100644
--- a/feature/src/main/resources/feature.xml
+++ b/feature/src/main/resources/feature.xml
@@ -418,7 +418,6 @@ limitations under the License.
     <feature name="jclouds-commands" description="Karaf Commands for jclouds" version="${project.version}" resolver="(obr)">
         <configfile finalname="/etc/org.apache.jclouds.shell.cfg">mvn:org.apache.jclouds.karaf/jclouds-karaf/${project.version}/cfg/shell</configfile>
         <feature version='${project.version}'>jclouds-services</feature>
-        <bundle>mvn:org.apache.servicemix.specs/org.apache.servicemix.specs.scripting-api-1.0/${scripting.api.bundle.version}</bundle>
         <bundle dependency="true">mvn:org.codehaus.groovy/groovy/${groovy.version}</bundle>
         <bundle dependency="true">mvn:org.codehaus.groovy/groovy-jsr223/${groovy.version}</bundle>
         <bundle>mvn:org.apache.jclouds.karaf/core/${project.version}</bundle>