SpringCloud Bus组件的使用配置详解

erlang-22.0.7-1.el7.x86_64.rpm
rabbitmq-server-3.7.18-1.el7.noarch.rpm

rpm -ivh erlang-22.0.7-1.el7.x86_64.rpm

yum install -y rabbitmq-server-3.7.18-1.el7.noarch.rpm
	注意:默认安装完成后配置文件模板在:/usr/share/doc/rabbitmq-server-3.7.18/rabbitmq.config.example目录中,需要将配置文件复制到/etc/rabbitmq/目录中,并修改名称为rabbitmq.config

cp /usr/share/doc/rabbitmq-server-3.7.18/rabbitmq.config.example /etc/rabbitmq/rabbitmq.config

ls /etc/rabbitmq/rabbitmq.config

vim /etc/rabbitmq/rabbitmq.config 

rabbitmq-plugins enable rabbitmq_management

出现如下说明:
	Enabling plugins on node rabbit@localhost:
rabbitmq_management
The following plugins have been configured:
  rabbitmq_management
  rabbitmq_management_agent
  rabbitmq_web_dispatch
Applying plugin configuration to rabbit@localhost...
The following plugins have been enabled:
  rabbitmq_management
  rabbitmq_management_agent
  rabbitmq_web_dispatch

set 3 plugins.
Offline change; changes will take effect at broker restart.

systemctl start rabbitmq-server
systemctl restart rabbitmq-server
systemctl stop rabbitmq-server

systemctl status rabbitmq-server

systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
systemctl stop firewalld   

username:  guest
password:  guest

<!--引入bus依赖-->
<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>

spring.rabbitmq.host=localhost											#连接主机
spring.rabbitmq.port=5672														#连接mq端口
spring.rabbitmq.username=user												#连接mq用户名
spring.rabbitmq.password=password										#连接mq密码

spring.cloud.config.fail-fast=true

@Component
public class UrlFilter  implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
 
    }
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest httpServletRequest = (HttpServletRequest)request;
        HttpServletResponse httpServletResponse = (HttpServletResponse)response;
        String url = new String(httpServletRequest.getRequestURI());
        //只过滤/actuator/bus-refresh请求
        if (!url.endsWith("/bus-refresh")) {
            chain.doFilter(request, response);
            return;
        }
        //获取原始的body
        String body = readAsChars(httpServletRequest);
        System.out.println("original body:   "+ body);
        //使用HttpServletRequest包装原始请求达到修改post请求中body内容的目的
        CustometRequestWrapper requestWrapper = new CustometRequestWrapper(httpServletRequest);
        chain.doFilter(requestWrapper, response);
    public void destroy() {
    private class CustometRequestWrapper extends HttpServletRequestWrapper {
        public CustometRequestWrapper(HttpServletRequest request) {
            super(request);
        @Override
        public ServletInputStream getInputStream() throws IOException {
            byte[] bytes = new byte[0];
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
            return new ServletInputStream() {
                @Override
                public boolean isFinished() {
                    return byteArrayInputStream.read() == -1 ? true:false;
                }
                public boolean isReady() {
                    return false;
                public void setReadListener(ReadListener readListener) {
                public int read() throws IOException {
                    return byteArrayInputStream.read();
            };
    public static String readAsChars(HttpServletRequest request)
    {
        BufferedReader br = null;
        StringBuilder sb = new StringBuilder("");
        try
        {
            br = request.getReader();
            String str;
            while ((str = br.readLine()) != null)
            {
                sb.append(str);
            }
            br.close();
        catch (IOException e)
            e.printStackTrace();
        finally
            if (null != br)
                try
                {
                    br.close();
                catch (IOException e)
                    e.printStackTrace();
        return sb.toString();
}