aerospike-core 2.1.0

Aerospike Client for Rust
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117

// Copyright 2015-2018 Aerospike, Inc.
//
// 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 std::str;
use std::sync::Arc;
use std::vec::Vec;

use base64::{engine::general_purpose::STANDARD as BASE64, Engine as _};

use crate::cluster::node;
use crate::cluster::Node;
use crate::commands::Message;
use crate::errors::{Error, Result};
use crate::net::Connection;
use crate::AdminPolicy;

use super::PartitionTable;

// Validates a Database server node
#[derive(Debug, Clone)]
pub struct PartitionTokenizer {
    buffer: Vec<u8>,
}

impl PartitionTokenizer {
    pub async fn new(
        policy: &AdminPolicy,
        conn: &mut Connection,
        node: &Arc<Node>,
    ) -> Result<Self> {
        let command = "replicas";
        let info_map = Message::info(policy, conn, &[command, node::PARTITION_GENERATION]).await?;
        if let Some(buf) = info_map.get(command) {
            return Ok(PartitionTokenizer {
                buffer: buf.as_bytes().to_owned(),
            });
        }

        // We re-update the partitions right now (in case its changed since it was last polled)
        node.update_partitions(&info_map)?;

        Err(Error::BadResponse("Missing replicas info".to_string()))
    }

    pub fn update_partition(&self, nmap: &mut PartitionTable, node: &Arc<Node>) -> Result<()> {
        // <ns>:<base64-encoded partition map>;<ns>:<base64-encoded partition map>; ...
        let part_str = str::from_utf8(&self.buffer)?;
        for part in part_str.trim_end().split(';') {
            match part.split_once(':') {
                Some((ns, info)) => {
                    let mut info_section = info.split(',');
                    let reigime = info_section
                        .next()
                        .ok_or_else(|| Error::BadResponse("Missing regime".to_string()))?
                        .parse()
                        .map_err(|err| Error::BadResponse(format!("Invalid regime: {err}")))?;

                    let n_replicas = info_section
                        .next()
                        .ok_or_else(|| Error::BadResponse("Missing replicas count".to_string()))?
                        .parse()
                        .map_err(|err| {
                            Error::BadResponse(format!("Invalid replicas count: {err}"))
                        })?;

                    let entry = nmap.entry(ns.to_string()).or_default();

                    if entry.replicas != n_replicas
                        && reigime
                            >= entry
                                .nodes
                                .iter()
                                .map(|(r, _)| *r)
                                .max()
                                .unwrap_or_default()
                    {
                        let wanted_size = n_replicas * node::PARTITIONS;
                        entry.nodes.resize_with(wanted_size, || (0, None));
                        entry.replicas = n_replicas;
                    }

                    for (section, replica) in
                        info_section.zip(entry.nodes.chunks_mut(node::PARTITIONS))
                    {
                        let restore_buffer = BASE64.decode(section)?;
                        for (idx, (this_reigimes, item)) in replica.iter_mut().enumerate() {
                            if restore_buffer[idx >> 3] & (0x80 >> (idx & 7) as u8) != 0
                                && reigime >= *this_reigimes
                            {
                                *item = Some(node.clone());
                                *this_reigimes = reigime;
                            }
                        }
                    }
                }
                _ => {
                    return Err(Error::BadResponse(
                        "Error parsing partition info".to_string(),
                    ))
                }
            }
        }

        Ok(())
    }
}