问题描述

我们在做公募的时候发现dubbo注册注册服务太慢，启动服务需要等很久。懒加载会造成客户体验不好，。在查看源代码后发现dubbo注册是锁注册方法。

问题出现的环境背景及自己尝试过哪些方法

相关代码

// 请把代码文本粘贴到下方（请勿用图片代替代码）
注册日志
2018-09-28 10:34:29,084[com.alibaba.dubbo.config.AbstractConfig]- [DUBBO] Refer dubbo service com.fulihui.sign.facade.admin.SignRemarkAdminService from url zookeeper://192.168.1.45:2181/com.alibaba.dubbo.registry.RegistryService?anyhost=true&application=com.fulihui.kirin.promobizmanage&check=false&default.check=false&default.lazy=true&default.retries=0&default.timeout=5000&default.validation=true&default.version=1.0.0&dubbo=2.8.4&generic=false&interface=com.fulihui.sign.facade.admin.SignRemarkAdminService&methods=selectLimitPage,update,insert,selectById,insertOrUpdate&pid=1932&revision=1.0.0&serialization=json&side=consumer&timestamp=1538102068414&version=1.0.0, dubbo version: 2.8.4, current host: 192.168.4.140
2018-09-28 10:34:29,154[alibaba.dubbo.registry.zookeeper.ZookeeperRegistry]- [DUBBO] Register: consumer://192.168.4.140/com.fulihui.sign.facade.admin.SignInStatAdminService?application=com.fulihui.kirin.promobizmanage&category=consumers&check=false&default.check=false&default.lazy=true&default.retries=0&default.timeout=5000&default.validation=true&default.version=1.0.0&dubbo=2.8.4&interface=com.fulihui.sign.facade.admin.SignInStatAdminService&methods=querySignInStat&pid=1932&revision=1.0.0&side=consumer&timestamp=1538102069150&version=1.0.0, dubbo version: 2.8.4, current host: 192.168.4.140
2018-09-28 10:34:29,324[alibaba.dubbo.registry.zookeeper.ZookeeperRegistry]- [DUBBO] Subscribe: consumer://192.168.4.140/com.fulihui.sign.facade.admin.SignInStatAdminService?application=com.fulihui.kirin.promobizmanage&category=providers,configurators,routers&default.check=false&default.lazy=true&default.retries=0&default.timeout=5000&default.validation=true&default.version=1.0.0&dubbo=2.8.4&interface=com.fulihui.sign.facade.admin.SignInStatAdminService&methods=querySignInStat&pid=1932&revision=1.0.0&side=consumer&timestamp=1538102069150&version=1.0.0, dubbo version: 2.8.4, current host: 192.168.4.140

你期待的结果是什么？实际看到的错误信息又是什么？

我建议可以把所有的注册URL放到一个容器（比如List，Map等）里面。用锁 锁住容器的下标，配置线程个数去轮训注册。

不如 像这样的代码，有可能注册会快一些：

    private static final Lock INDEX_LOCK = new ReentrantLock();
private static Integer index = 0;

public static void main(String[] args) throws InterruptedException {
    final ArrayList<Integer> arrayList = new ArrayList<Integer>();
    Long count = 99999L;

    for (int i = 0; i < count; i++) {
        arrayList.add(i);
    }

    CountDownLatch latch = new CountDownLatch(10);
    System.out.println("开始输出");
    for (int i = 0; i < 10; i++) {
        new Thread(new Runnable() {
            
            @Override
            public void run() {
                while(true) {
                    try {
                        index = getIndex(arrayList.size()-1);
                        if(index == -1) {
                            break;
                        }
                        System.out.println(arrayList.get(index));
                    }finally {
                        latch.countDown();
                    }
                }
            }
        }).start();
        
        latch.await();
        
        System.out.println("OK");
    }
    
}

public static int getIndex(int count) {
    try {
        INDEX_LOCK.lock();
        
        if (index < count) {
            index =  index+ 1;
            return index;
        }
        return -1;
    } finally {
        INDEX_LOCK.unlock();
    }
}