package com.java110.core.event.cmd;
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import com.alibaba.fastjson.JSONObject;
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import com.java110.core.context.ICmdDataFlowContext;
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import com.java110.core.event.center.DataFlowListenerOrderComparator;
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import com.java110.core.log.LoggerFactory;
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import com.java110.dto.CmdListenerDto;
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import com.java110.utils.constant.CommonConstant;
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import com.java110.utils.constant.ResponseConstant;
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import com.java110.utils.exception.ListenerExecuteException;
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import com.java110.utils.factory.ApplicationContextFactory;
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import com.java110.utils.log.LoggerEngine;
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import com.java110.utils.util.Assert;
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import org.slf4j.Logger;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.Executor;
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import java.util.concurrent.Executors;
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/**
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* 数据流 事件发布
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* Created by wuxw on 2018/4/17.
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*/
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public class ServiceCmdEventPublishing {
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private static Logger logger = LoggerFactory.getLogger(ServiceCmdEventPublishing.class);
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private static Executor taskExecutor;
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//默认 线程数 100
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private static final int DEFAULT_THREAD_NUM = 100;
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/**
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* 保存侦听实例信息，一般启动时加载
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*/
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private static final List<CmdListenerDto> listeners = new ArrayList<CmdListenerDto>();
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/**
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* 根据 事件类型查询侦听
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*/
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private static final Map<String, List<ServiceCmdListener>> cacheListenersMap = new HashMap<String, List<ServiceCmdListener>>();
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/**
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* 添加 侦听，这个只有启动时，单线程 处理，所以是线程安全的
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*
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* @param listener
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*/
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public static void addListener(CmdListenerDto listener) {
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listeners.add(listener);
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}
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/**
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* 获取侦听（全部侦听）
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*
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* @return
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*/
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public static List<CmdListenerDto> getListeners() {
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return listeners;
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}
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/**
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* 根据是否实现了某个接口，返回侦听
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*
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* @param serviceCode
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* @return
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* @since 1.8
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*/
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public static List<ServiceCmdListener> getListeners(String serviceCode) {
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Assert.hasLength(serviceCode, "获取需要发布的事件处理侦听时，传递事件为空，请检查");
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String needCachedServiceCode = serviceCode;
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//先从缓存中获取，为了提升效率
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if (cacheListenersMap.containsKey(needCachedServiceCode)) {
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return cacheListenersMap.get(needCachedServiceCode);
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}
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List<ServiceCmdListener> cmdListeners = new ArrayList<ServiceCmdListener>();
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for (CmdListenerDto listenerBean : getListeners()) {
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//ServiceCmdListener listener = ApplicationContextFactory.getBean(listenerBean.getBeanName(), ServiceCmdListener.class);
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ServiceCmdListener listener = ApplicationContextFactory.getBean(listenerBean.getBeanName(), ServiceCmdListener.class);
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if (listenerBean.getServiceCode().equals(serviceCode)) {
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cmdListeners.add(listener);
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}
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}
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//这里排序
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DataFlowListenerOrderComparator.sort(cmdListeners);
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//将数据放入缓存中
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if (cmdListeners.size() > 0) {
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cacheListenersMap.put(needCachedServiceCode, cmdListeners);
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}
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return cmdListeners;
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}
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/**
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* 发布事件
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*
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* @param cmdDataFlowContext
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*/
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public static void multicastEvent(ICmdDataFlowContext cmdDataFlowContext) throws Exception {
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Assert.notNull(cmdDataFlowContext.getServiceCode(), "当前没有可处理的业务信息！");
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//todo 根据cmd serviceCode 发布事件
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multicastEvent(cmdDataFlowContext.getServiceCode(), cmdDataFlowContext, null);
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}
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/**
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* 发布事件
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*
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* @param serviceCode
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* @param dataFlowContext
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*/
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public static void multicastEvent(String serviceCode, ICmdDataFlowContext dataFlowContext) throws Exception {
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multicastEvent(serviceCode, dataFlowContext, null);
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}
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/**
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* 发布事件
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*
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* @param serviceCode
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* @param dataFlowContext 这个订单信息，以便于 侦听那边需要用
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*/
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public static void multicastEvent(String serviceCode, ICmdDataFlowContext dataFlowContext, String asyn) throws Exception {
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try {
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//todo 组装事件
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CmdEvent targetDataFlowEvent = new CmdEvent(serviceCode, dataFlowContext);
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//todo 发布事件
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multicastEvent(serviceCode, targetDataFlowEvent, asyn);
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} catch (Exception e) {
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logger.error("发布侦听失败，失败原因为：", e);
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//throw new BusinessException(ResponseConstant.RESULT_CODE_INNER_ERROR, e.getMessage());
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throw e;
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}
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}
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/**
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* 发布事件
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*
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* @param event
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* @param asyn A 表示异步处理
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*/
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public static void multicastEvent(String serviceCode, final CmdEvent event, String asyn) throws Exception {
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//todo 根据serviceCode 去寻找 处理的Cmd处理类 如果java类中 @Java110Cmd(serviceCode = "xx.xx") 写了该注解就会被寻找到
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List<ServiceCmdListener> listeners = getListeners(serviceCode);
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//这里判断 serviceCode + httpMethod 的侦听，如果没有注册直接报错。
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if (listeners == null || listeners.size() == 0) {
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throw new ListenerExecuteException(ResponseConstant.RESULT_CODE_ERROR,
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"服务【" + serviceCode + "】当前不支持");
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}
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for (final ServiceCmdListener listener : listeners) {
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if (CommonConstant.PROCESS_ORDER_ASYNCHRONOUS.equals(asyn)) { //todo 异步处理,一般很少用
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Executor executor = getTaskExecutor();
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executor.execute(new Runnable() {
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@Override
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public void run() {
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try {
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invokeListener(listener, event);
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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});
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break;
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} else {
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// todo 通过同步的方式调用CMDjava类
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invokeListener(listener, event);
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break;
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}
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}
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}
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/**
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* Return the current task executor for this multicaster.
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*/
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protected static synchronized Executor getTaskExecutor() {
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if (taskExecutor == null) {
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taskExecutor = Executors.newFixedThreadPool(DEFAULT_THREAD_NUM);
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}
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return taskExecutor;
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}
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/**
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* 执行 根据serviceCode 找到的cmd 类
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*
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* @param listener the ApplicationListener to invoke
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* @param event the current event to propagate
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* @since 4.1
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*/
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@SuppressWarnings({"unchecked", "rawtypes"})
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protected static void invokeListener(ServiceCmdListener listener, CmdEvent event) throws Exception {
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try {
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//todo 获取 cmd 上下文对象
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ICmdDataFlowContext dataFlowContext = event.getCmdDataFlowContext();
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//todo 获取请求数据
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JSONObject reqJson = dataFlowContext.getReqJson();
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logger.debug("API服务 --- 请求参数为：{}", reqJson.toJSONString());
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//todo 调用 cmd的校验方法
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listener.validate(event, dataFlowContext, reqJson);
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//todo 调用 cmd的业务处理方法
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listener.doCmd(event, dataFlowContext, reqJson);
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//logger.debug("API服务 --- 返回报文信息：{}", dataFlowContext.getResponseEntity());
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// listener.cmd(event);
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} catch (Throwable e) {
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LoggerEngine.error("发布侦听失败" + e);
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throw e;
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}
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}
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}
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