/**
* @param engineName the script engine name (eg "groovy", etc)
* @return the Script engine to use to evaluate the script
* @throws MacroExecutionException in case of an error in parsing the jars parameter
*/
private ScriptEngine getScriptEngine(String engineName) throws MacroExecutionException {
// Look for a script engine in the Execution Context since we want the same engine to be used
// for all evals during the same execution lifetime.
// We must use the same engine because that engine may create an internal ClassLoader in which
// it loads new classes defined in the script and if we create a new engine then defined classes
// will be lost.
// However we also need to be able to execute several script Macros during a single execution
// request
// and for example the second macro could have jar parameters. In order to support this use case
// we ensure in AbstractScriptMacro to reuse the same thread context ClassLoader during the
// whole
// request execution.
ExecutionContext executionContext = this.execution.getContext();
Map<String, ScriptEngine> scriptEngines =
(Map<String, ScriptEngine>) executionContext.getProperty(EXECUTION_CONTEXT_ENGINE_KEY);
if (scriptEngines == null) {
scriptEngines = new HashMap<String, ScriptEngine>();
executionContext.setProperty(EXECUTION_CONTEXT_ENGINE_KEY, scriptEngines);
}
ScriptEngine engine = scriptEngines.get(engineName);
if (engine == null) {
ScriptEngineManager sem = new ScriptEngineManager();
engine = sem.getEngineByName(engineName);
scriptEngines.put(engineName, engine);
}
return engine;
}
/** @return the XWikiContext */
protected XWikiContext getXWikiContext() {
ExecutionContext executionContext = this.execution.getContext();
XWikiContext context =
(XWikiContext) executionContext.getProperty(XWikiContext.EXECUTIONCONTEXT_KEY);
// FIXME: Do we need this? Maybe when running an index Thread?
// if (context == null) {
// context = this.contextProvider.createStubContext();
// executionContext.setProperty(XWikiContext.EXECUTIONCONTEXT_KEY, context);
// }
return context;
}
