package io.seata.samples.common.filter; import io.seata.core.context.RootContext; import org.apache.commons.lang.StringUtils; import org.springframework.stereotype.Component; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import java.io.IOException; @Component public class SeataFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { HttpServletRequest req = (HttpServletRequest) servletRequest; String xid = req.getHeader(RootContext.KEY_XID.toLowerCase()); boolean isBind = false; if (StringUtils.isNotBlank(xid)) { RootContext.bind(xid); isBind = true; } try { filterChain.doFilter(servletRequest, servletResponse); } finally { if (isBind) { RootContext.unbind(); } } } @Override public void destroy() { } }