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package com.yixan.tools.common.sync;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import com.yixan.tools.common.util.ReflectUtil;

/**
 * 异步执行方法, 带结果回调

 * Callback<String> callback = new Callback.Log<>();

 * Args args = new AnyArgs(arg1, arg2);

 * new SyncInvoker<XxxService, String>(xxxService, "methood", args, callback).start();

 *
 * @author zhaohuihua
 * @version V1.0 2017年5月26日
 */
public class SyncInvoker extends Thread {

    protected T target;
    protected String method;
    protected Args args;
    protected Callback callback;

    public SyncInvoker(T target, String method, Args args, Callback callback) {
        this.target = target;
        this.method = method;
        this.args = args;
        this.callback = callback;
    }

    public void run() {
        Class[] types = args.types();
        Object[] values = args.values();
        try {
            Method method = ReflectUtil.findMethod(target.getClass(), this.method, types);
            Object result = method.invoke(target, values);
            if (callback != null) {
                @SuppressWarnings("unchecked")
                R r = (R) result;
                callback.done(r);
            }
        } catch (Throwable e) {
            if (e instanceof InvocationTargetException) { // method.invoke抛出未捕获的异常由该异常包装
                e = e.getCause();
            }

            if (callback != null) {
                callback.fail(target, method, args, e);
            }
        }
    }
}