QoS匿名访问权限验证扩展

src
 |-main
    |-java
        |-com
            |-xxx
                |-XxxPermissionChecker.java (实现PermissionChecker接口)
    |-resources
        |-META-INF
            |-dubbo
                |-org.apache.dubbo.qos.permission.PermissionChecker` (纯文本文件，内容为：qosPermissionChecker=com.xxx.XxxPermissionChecker)

package com.xxx.qos.permission;

import org.apache.dubbo.qos.permission.PermissionChecker;

public class XxxAnonymousAccessPermissionChecker implements PermissionChecker {

    @Override
    public boolean access(CommandContext commandContext, PermissionLevel defaultCmdRequiredPermissionLevel) {
      // ...
    }
}

qosPermissionChecker=com.xxx.XxxPermissionChecker