final ErrorCollector errorCollector = new ErrorCollector();
boolean cacheable = true;
try {
resp.setContentType(MIME_TYPE_JAVASCRIPT);
new JsCompressor().compress(jssr, writer, errorCollector);
} catch (EvaluatorException ee) {
cacheable = false;
resp.setStatus(404);
resp.setContentType("text/plain");
writer.write("Errors:\n");