rocketmq-protocol 1.0.0

// Copyright 2023 The RocketMQ Rust Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use cheetah_string::CheetahString;
use rocketmq_macros::RequestHeaderCodec;
use serde::Deserialize;
use serde::Serialize;

use crate::protocol::header::message_operation_header::TopicRequestHeaderTrait;
use crate::protocol::header::namesrv::topic_operation_header::TopicRequestHeader;

#[derive(Clone, Debug, Serialize, Deserialize, RequestHeaderCodec)]
#[header(
    type_id = "rocketmq_protocol::protocol::header::peek_message_request_header::PeekMessageRequestHeader",
    java_class = "org.apache.rocketmq.remoting.protocol.header.PeekMessageRequestHeader"
)]
#[serde(rename_all = "camelCase")]
pub struct PeekMessageRequestHeader {
    #[header(required)]
    pub consumer_group: CheetahString,

    #[header(required)]
    pub topic: CheetahString,

    /// If negative, peek from all queues
    #[header(required)]
    pub queue_id: i32,

    #[header(required)]
    pub max_msg_nums: i32,

    #[serde(flatten)]
    #[header(flatten, presence = "always")]
    pub topic_request_header: Option<TopicRequestHeader>,
}

impl Default for PeekMessageRequestHeader {
    fn default() -> Self {
        PeekMessageRequestHeader {
            consumer_group: CheetahString::new(),
            topic: CheetahString::new(),
            queue_id: 0,
            max_msg_nums: 32,
            topic_request_header: None,
        }
    }
}

impl TopicRequestHeaderTrait for PeekMessageRequestHeader {
    fn set_lo(&mut self, lo: Option<bool>) {
        if let Some(header) = self.topic_request_header.as_mut() {
            header.lo = lo;
        }
    }

    fn lo(&self) -> Option<bool> {
        self.topic_request_header.as_ref().and_then(|h| h.lo)
    }

    fn set_topic(&mut self, topic: CheetahString) {
        self.topic = topic;
    }

    fn topic(&self) -> &CheetahString {
        &self.topic
    }

    fn broker_name(&self) -> Option<&CheetahString> {
        self.topic_request_header
            .as_ref()
            .and_then(|h| h.rpc.as_ref())
            .and_then(|h| h.broker_name.as_ref())
    }

    fn set_broker_name(&mut self, broker_name: CheetahString) {
        if let Some(header) = self.topic_request_header.as_mut() {
            if let Some(rpc_header) = header.rpc.as_mut() {
                rpc_header.broker_name = Some(broker_name);
            }
        }
    }

    fn namespace(&self) -> Option<&str> {
        self.topic_request_header
            .as_ref()
            .and_then(|h| h.rpc.as_ref())
            .and_then(|r| r.namespace.as_deref())
    }

    fn set_namespace(&mut self, namespace: CheetahString) {
        if let Some(header) = self.topic_request_header.as_mut() {
            if let Some(rpc_header) = header.rpc.as_mut() {
                rpc_header.namespace = Some(namespace);
            }
        }
    }

    fn namespaced(&self) -> Option<bool> {
        self.topic_request_header
            .as_ref()
            .and_then(|h| h.rpc.as_ref())
            .and_then(|r| r.namespaced)
    }

    fn set_namespaced(&mut self, namespaced: bool) {
        if let Some(header) = self.topic_request_header.as_mut() {
            if let Some(rpc_header) = header.rpc.as_mut() {
                rpc_header.namespaced = Some(namespaced);
            }
        }
    }

    fn oneway(&self) -> Option<bool> {
        self.topic_request_header
            .as_ref()
            .and_then(|h| h.rpc.as_ref())
            .and_then(|r| r.oneway)
    }

    fn set_oneway(&mut self, oneway: bool) {
        if let Some(header) = self.topic_request_header.as_mut() {
            if let Some(rpc_header) = header.rpc.as_mut() {
                rpc_header.oneway = Some(oneway);
            }
        }
    }

    fn queue_id(&self) -> i32 {
        self.queue_id
    }

    fn set_queue_id(&mut self, queue_id: i32) {
        self.queue_id = queue_id;
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_default_implementation() {
        let header = PeekMessageRequestHeader::default();
        assert_eq!(header.consumer_group, CheetahString::new());
        assert_eq!(header.topic, CheetahString::new());
        assert_eq!(header.queue_id, 0);
        assert_eq!(header.max_msg_nums, 32);
        assert!(header.topic_request_header.is_none());
    }
    #[test]
    fn test_serialization_deserialization() {
        let header = PeekMessageRequestHeader {
            consumer_group: CheetahString::from("test_consumer_group"),
            topic: CheetahString::from("test_topic"),
            queue_id: 10,
            max_msg_nums: 32,
            ..Default::default()
        };

        // Serialize to JSON
        let json = serde_json::to_string(&header).unwrap();

        // Deserialize from JSON
        let deserialized: PeekMessageRequestHeader = serde_json::from_str(&json).unwrap();

        assert_eq!(deserialized.consumer_group, header.consumer_group);
        assert_eq!(deserialized.topic, header.topic);
        assert_eq!(deserialized.queue_id, header.queue_id);
        assert_eq!(deserialized.max_msg_nums, header.max_msg_nums);
    }
}