started implementing caching

src/lxc/lxc.py

@@ -1,5 +1,4 @@
 import logging
-import time
 
 from . import creation_utils, lxc_utils
 from ..utils.machine import LinuxMachine
@@ -177,6 +176,20 @@ class LXC(LinuxMachine):
         Get IPv4
         :return: ipv4
         """
+
+        if netmask:
+            ipv4 = self.get_in_cache('network', 'ipv4_netmask')
+            if ipv4 is None:
+                self.set_in_cache('network', 'ipv4_netmask', self.retrieve_ipv4(netmask=netmask, use_ssh=use_ssh))
+            return self.get_in_cache('network', 'ipv4_netmask')
+
+        else:
+            ipv4 = self.get_in_cache('network', 'ipv4')
+            if ipv4 is None:
+                self.set_in_cache('network', 'ipv4', self.retrieve_ipv4(netmask=netmask, use_ssh=use_ssh))
+            return self.get_in_cache('network', 'ipv4')
+
+    def retrieve_ipv4(self, netmask: bool = False, use_ssh: bool = False):
         if self.ipv4 == "dhcp":
             if self.is_running():
                 if self.has_program("ip", use_ssh=use_ssh):
@@ -389,7 +402,6 @@ class LXC(LinuxMachine):
         if working_directory:
             command = f"cd {working_directory} && {command}"
 
-
         # Using pct exec works every time but is 8x slower than using ssh
         if use_ssh:
             return self.pve.run_command(
@@ -399,6 +411,6 @@ class LXC(LinuxMachine):
                 exception_on_empty_stdout=exception_on_empty_stdout)
         else:
             return self.pve.run_command(command=f"pct exec {self.lxc_id} -- {command}",
-                                           return_status_code=return_status_code,
-                                           exception_on_exit=exception_on_exit,
-                                           exception_on_empty_stdout=exception_on_empty_stdout)
+                                        return_status_code=return_status_code,
+                                        exception_on_exit=exception_on_exit,
+                                        exception_on_empty_stdout=exception_on_empty_stdout)

src/utils/machine.py

@@ -6,7 +6,7 @@ from src.utils import utils
 class LinuxMachine():
 
     def __init__(self):
-        pass
+        self.cache = {}
 
     def update(self):
         pass
@@ -29,21 +29,38 @@ class LinuxMachine():
 
     def get_memory(self):
         """Get memory"""
-        return self.run_command("free -m | grep Mem | awk '{print $2}'")
+
+        memory = self.get_in_cache('system', 'memory')
+        if memory is None:
+            self.set_in_cache('system', 'memory', self.run_command("free -m | grep Mem | awk '{print $2}'"))
+
+        return self.get_in_cache('system', 'memory')
 
     def get_ipv4(self):
         """Get IPv4 address"""
-        if self.has_program("ip"):
-            return self.run_command("""ip addr | grep 'state UP' -A2 | tail -n1 | awk '{print $2}' | cut -f1  -d'/'""")
-        elif self.has_program("ifconfig"):
-            return self.run_command(command="ifconfig eth0 | awk '/inet addr/{print substr($2,6)}'")
+        ipv4 = self.get_in_cache('system', 'ipv4')
+        if ipv4 is None:
+            if self.has_program("ip"):
+                self.set_in_cache('system', 'ipv4', self.run_command(command=
+                                                                     """ip addr | grep 'state UP' -A2 | tail -n1 | 
+                                                                     awk '{print $2}' | cut -f1  -d'/'"""))
+            elif self.has_program("ifconfig"):
+                self.set_in_cache('system', 'ipv4',
+                                  self.run_command(command="ifconfig eth0 | awk '/inet addr/{print substr($2,6)}'"))
+
+        return self.get_in_cache('system', 'ipv4')
 
     def get_ipv6(self):
         pass
 
     def get_mac(self):
         """Get MAC address"""
-        return self.run_command("""cat /sys/class/net/$(ip route show default | awk '/default/ {print $5}')/address""")
+        mac = self.get_in_cache('system', 'mac')
+        if mac is None:
+            self.set_in_cache('system', 'mac', self.run_command(
+                """cat /sys/class/net/$(ip route show default | awk '/default/ {print $5}')/address"""))
+
+        return self.get_in_cache('system', 'mac')
 
     def start(self):
         pass
@@ -61,9 +78,17 @@ class LinuxMachine():
         :return: boolean
         """
         if type(program) == str:
-            return self.run_command("which " + program, return_status_code=True, use_ssh=use_ssh) == 0
+            program_cache = self.get_in_cache('known_programs', program)
+            if program_cache is None:
+                self.set_in_cache('known_programs', program, str(self.run_command("which " + program,
+                                                                                  return_status_code=True,
+                                                                                  use_ssh=use_ssh) == 0))
+            return bool(self.get_in_cache('known_programs', program))
         elif type(program) == list:
-            return all((self.run_command("which " + p, return_status_code=True, use_ssh=use_ssh) == 0) for p in program)
+            programs = []
+            for p in program:
+                programs.append(self.has_program(p))
+            return all(programs)
 
     def has_file(self, file: str or Path):
         """Check if file exists on LXC
@@ -301,3 +326,22 @@ class LinuxMachine():
         else:
             self.run_command(f"sed {'-i' if case_sensitive else ''} 's/{search}/{replace}/g' {path}",
                              return_status_code=True)
+
+    def get_in_cache(self, category: str, property: str):
+        if category in self.cache:
+            if property in self.cache[category]:
+                return self.cache[category][property]
+            else:
+                return None
+
+    def set_in_cache(self, category: str, property: str = None, value: str = None):
+        if category not in self.cache:
+            self.cache[category] = {}
+
+        if property is not None and value is not None:
+            if property not in self.cache[category]:
+                self.cache[category] = {}
+
+            self.cache[category] = {property: value}
+        else:
+            raise ValueError("Key and value must be specified to save in the cache")

src/utils/proxmox.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import fnmatch
 import subprocess
+import threading
 import time
 from pathlib import Path
 from typing import TYPE_CHECKING
@@ -40,12 +41,26 @@ class ProxmoxHost(LinuxMachine):
         self.connection = None
         self.repo_path = path.as_posix()
 
+        threading.Thread(target=self.update).start()
+
     def __str__(self):
         return f"ProxmoxHost({self.host}, {self.user}, {self.port})"
 
     def __repr__(self):
         return f"ProxmoxHost({self.host}, {self.user}, {self.port})"
 
+    def update(self):
+        update_connection = Connection(host=self.host, user=self.user, port=self.port)
+        while True:
+            pct_output = update_connection.run("pct list", hide=True, warn=True, encoding="utf-8").stdout.split("\n")[
+                         1:]
+            for line in pct_output:
+                if line.strip():
+                    vmid, status, name = line.split()
+                    self.set_in_cache('lxc', vmid.strip(), str("running" in status.strip()))
+
+            time.sleep(1)
+
     def connect(self):
         """Connect to the Proxmox host."""
         if self.host is not None:
@@ -100,12 +115,15 @@ class ProxmoxHost(LinuxMachine):
         """
 
         # Check if host is None, if it is, run the command locally, else run it on the host via SSH
+        start_time = time.time()
+
         if self.host is None:
             command_result = subprocess.run(command, shell=True, capture_output=True, encoding="utf-8")
         elif self.connection is not None:
             command_result = self.connection.run(command, hide=True, warn=True, encoding="utf-8")
         else:
             raise Exception("No host or connection provided")
+        print(f"Time taken for {command}: {time.time() - start_time}")
 
         # If return code is not 0 and that exception_on_exit is True and return_status_code is False, throw an exception
         if command_result.return_code != 0 and exception_on_exit and not return_status_code:
@@ -149,8 +167,12 @@ class ProxmoxHost(LinuxMachine):
     def is_lxc_running(self, lxc_id):
         """Check if the given LXC is running on the Proxmox host."""
 
-        pct_status_output = self.run_command(f"pct status {lxc_id}", exception_on_exit=False)
-        return "running" in pct_status_output
+        lxc = self.get_in_cache('lxc', lxc_id)
+        if lxc is None:
+            self.set_in_cache('lxc', lxc_id,
+                              str('running' in self.run_command(f"pct status {lxc_id}", exception_on_exit=False)))
+
+        return self.get_in_cache('lxc', lxc_id)
 
     def start_lxc(self, lxc_id):
         """Start the given LXC on the Proxmox host."""