ScriptRouter.java 文件源码

public ScriptRouter(URL url) {
    this.url = url;
    String type = url.getParameter(Constants.TYPE_KEY);
    this.priority = url.getParameter(Constants.PRIORITY_KEY, 0);
    String rule = url.getParameterAndDecoded(Constants.RULE_KEY);
    if (type == null || type.length() == 0) {
        type = Constants.DEFAULT_SCRIPT_TYPE_KEY;
    }
    if (rule == null || rule.length() == 0) {
        throw new IllegalStateException(new IllegalStateException("route rule can not be empty. rule:" + rule));
    }
    ScriptEngine engine = engines.get(type);
    if (engine == null) {
        engine = new ScriptEngineManager().getEngineByName(type);
        if (engine == null) {
            throw new IllegalStateException(new IllegalStateException("Unsupported route rule type: " + type + ", rule: " + rule));
        }
        engines.put(type, engine);
    }
    this.engine = engine;
    this.rule = rule;
}