/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.module.scripting.component;
import org.mule.api.MuleEvent;
import org.mule.api.MuleException;
import org.mule.api.component.InterfaceBinding;
import org.mule.api.lifecycle.InitialisationException;
import org.mule.component.AbstractComponent;
import org.mule.component.BindingInvocationHandler;
import org.mule.util.ClassUtils;
import java.lang.reflect.Proxy;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.script.Bindings;
/**
* A Script service backed by a JSR-223 compliant script engine such as
* Groovy, JavaScript, or Rhino.
*/
public class ScriptComponent extends AbstractComponent
{
protected List<InterfaceBinding> bindings = new ArrayList<InterfaceBinding>();
private Scriptable script;
private Map<String, Object> proxies;
@Override
protected void doInitialise() throws InitialisationException
{
script.setMuleContext(muleContext);
super.doInitialise();
try
{
configureComponentBindings();
}
catch (MuleException e)
{
throw new InitialisationException(e, this);
}
}
@Override
protected Object doInvoke(MuleEvent event) throws Exception
{
// Set up initial script variables.
Bindings bindings = script.getScriptEngine().createBindings();
if (proxies.size() > 0)
{
bindings.putAll(proxies);
}
script.populateBindings(bindings, event);
try
{
return script.runScript(bindings);
}
catch (Exception e)
{
// leave this catch block in place to help debug classloading issues
throw e;
} finally {
bindings.clear();
}
}
public Scriptable getScript()
{
return script;
}
public void setScript(Scriptable script)
{
this.script = script;
}
public List<InterfaceBinding> getInterfaceBindings()
{
return bindings;
}
public void setInterfaceBindings(List<InterfaceBinding> bindingCollection)
{
this.bindings = bindingCollection;
}
protected void configureComponentBindings() throws MuleException
{
proxies = new HashMap<String, Object>();
// Initialise the nested router and bind the endpoints to the methods using a
// Proxy
if (bindings != null && bindings.size() > 0)
{
for (Iterator<?> it = bindings.iterator(); it.hasNext();)
{
InterfaceBinding interfaceBinding = (InterfaceBinding) it.next();
String bindingName = ClassUtils.getSimpleName(interfaceBinding.getInterface());
if (proxies.containsKey(bindingName))
{
Object proxy = proxies.get(bindingName);
BindingInvocationHandler handler = (BindingInvocationHandler) Proxy.getInvocationHandler(proxy);
handler.addRouterForInterface(interfaceBinding);
}
else
{
Object proxy = Proxy.newProxyInstance(muleContext.getExecutionClassLoader(),
new Class[]{interfaceBinding.getInterface()},
new BindingInvocationHandler(interfaceBinding));
proxies.put(bindingName, proxy);
}
}
}
}
}