public void cache(final String selectorName, final BootstrapServer bootstrapServer) {
        cache.put(selectorName, bootstrapServer);
    }
cache bootstrapServer by selectorName.

@param selectorName    selectorName
@param bootstrapServer bootstrapServer
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-tcp/src/main/java/org/apache/shenyu/plugin/tcp/handler/TcpBootstrapFactory.java