Example usage for javax.script ScriptContext getErrorWriter

Introduction

In this page you can find the example usage for javax.script ScriptContext getErrorWriter.

Prototype

public Writer getErrorWriter();

Source Link

Document

Returns the Writer used to display error output.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptContext ctx = new SimpleScriptContext();

    // Get the reader and writers from the script context
    Reader inputReader = ctx.getReader();
    Writer outputWriter = ctx.getWriter();
    Writer errWriter = ctx.getErrorWriter();

    // Write all script outputs to an out.txt file
    Writer fileWriter = new FileWriter("out.txt");
    ctx.setWriter(fileWriter);//from www  .  j  a v a 2  s.co  m
}

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From source file:org.ow2.proactive.scheduler.task.java.JavaClassScriptEngine.java

@Override
public Object eval(String userExecutableClassName, ScriptContext context) throws ScriptException {

    try {//from   w ww  . ja  v  a 2  s.  c om
        JavaExecutable javaExecutable = getExecutable(userExecutableClassName);

        JavaStandaloneExecutableInitializer execInitializer = new JavaStandaloneExecutableInitializer();
        PrintStream output = new PrintStream(new WriterOutputStream(context.getWriter()), true);
        execInitializer.setOutputSink(output);
        PrintStream error = new PrintStream(new WriterOutputStream(context.getErrorWriter()), true);
        execInitializer.setErrorSink(error);

        Map<String, byte[]> propagatedVariables = null;
        if (context.getAttribute(SchedulerConstants.VARIABLES_BINDING_NAME) != null) {
            propagatedVariables = SerializationUtil.serializeVariableMap(
                    ((VariablesMap) context.getAttribute(SchedulerConstants.VARIABLES_BINDING_NAME))
                            .getPropagatedVariables());
            execInitializer.setPropagatedVariables(propagatedVariables);
        } else {
            execInitializer.setPropagatedVariables(Collections.<String, byte[]>emptyMap());
        }

        if (context.getAttribute(Script.ARGUMENTS_NAME) != null) {
            execInitializer.setSerializedArguments(
                    (Map<String, byte[]>) ((Serializable[]) context.getAttribute(Script.ARGUMENTS_NAME))[0]);
        } else {
            execInitializer.setSerializedArguments(Collections.<String, byte[]>emptyMap());
        }

        if (context.getAttribute(SchedulerConstants.CREDENTIALS_VARIABLE) != null) {
            execInitializer.setThirdPartyCredentials(
                    (Map<String, String>) context.getAttribute(SchedulerConstants.CREDENTIALS_VARIABLE));
        } else {
            execInitializer.setThirdPartyCredentials(Collections.<String, String>emptyMap());
        }

        if (context.getAttribute(SchedulerConstants.MULTI_NODE_TASK_NODESURL_BINDING_NAME) != null) {
            List<String> nodesURLs = (List<String>) context
                    .getAttribute(SchedulerConstants.MULTI_NODE_TASK_NODESURL_BINDING_NAME);
            execInitializer.setNodesURL(nodesURLs);
        } else {
            execInitializer.setNodesURL(Collections.<String>emptyList());
        }

        javaExecutable.internalInit(execInitializer, context);

        Serializable execute = javaExecutable
                .execute((TaskResult[]) context.getAttribute(SchedulerConstants.RESULTS_VARIABLE));

        if (propagatedVariables != null) {
            ((Map<String, Serializable>) context.getAttribute(SchedulerConstants.VARIABLES_BINDING_NAME))
                    .putAll(javaExecutable.getVariables());
        }

        output.close();
        error.close();
        return execute;

    } catch (Throwable e) {
        throw new ScriptException(new TaskException(getStackTraceAsString(e), e));
    }
}

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From source file:org.jahia.services.workflow.jbpm.JBPMMailProducer.java

private String evaluateExpression(Execution execution, String scriptToExecute, JCRSessionWrapper session)
        throws RepositoryException, ScriptException {
    ScriptContext scriptContext = scriptEngine.getContext();
    if (bindings == null) {
        bindings = getBindings(execution, session);
    }//from   w  ww  .  j av  a  2  s.c  o  m
    scriptContext.setWriter(new StringWriter());
    scriptContext.setErrorWriter(new StringWriter());
    scriptEngine.eval(scriptToExecute, bindings);
    String error = scriptContext.getErrorWriter().toString();
    if (error.length() > 0) {
        logger.error("Scripting error : " + error);
    }
    return scriptContext.getWriter().toString().trim();
}

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From source file:org.apache.felix.webconsole.plugins.scriptconsole.internal.ScriptConsolePlugin.java

private void eval(String script, String lang, ScriptContext ctx) throws ScriptException, IOException {
    ScriptEngine scriptEngine = scriptEngineManager.getEngineByExtension(lang);
    if (scriptEngine == null) {
        throw new IllegalArgumentException("No ScriptEngineFactory found for extension " + lang);
    }/*from  w w  w. j  a  v  a 2s  . c o m*/

    // evaluate the script
    //Currently we do not make use of returned object
    final Object result = scriptEngine.eval(script, ctx);

    // allways flush the error channel
    ctx.getErrorWriter().flush();

}

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From source file:org.jahia.services.workflow.jbpm.custom.email.JBPMMailProducer.java

protected String evaluateExpression(WorkItem workItem, String scriptToExecute, JCRSessionWrapper session)
        throws RepositoryException, ScriptException {
    ScriptContext scriptContext = new SimpleScriptContext();
    if (bindings == null) {
        bindings = getBindings(workItem, session);
    }//from   w ww.j  ava  2 s.  c o  m
    scriptContext.setWriter(new StringWriter());
    scriptContext.setErrorWriter(new StringWriter());
    scriptContext.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
    scriptContext.setBindings(scriptContext.getBindings(ScriptContext.GLOBAL_SCOPE),
            ScriptContext.GLOBAL_SCOPE);
    scriptEngine.eval(scriptToExecute, scriptContext);
    String error = scriptContext.getErrorWriter().toString();
    if (error.length() > 0) {
        logger.error("Scripting error : " + error);
    }
    return scriptContext.getWriter().toString().trim();
}

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