public void setCluster(final String cluster) {
        this.cluster = cluster;
    }
Sets cluster.

@param cluster the cluster
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-dubbo/shenyu-plugin-dubbo-common/src/main/java/org/apache/shenyu/plugin/dubbo/common/cache/DubboParam.java