added json deserialization to system module

experiments/simbricks/orchestration/simulation/channel.py

@@ -44,6 +44,8 @@ class Channel(utils_base.IdObj):
 
     def toJSON(self):
         json_obj = super().toJSON()
+        json_obj["type"] = self.__class__.__name__
+        json_obj["module"] = self.__class__.__module__
         json_obj["synchronized"] = self._synchronized
         json_obj["sync_period"] = self.sync_period
         json_obj["sys_channel"] = self.sys_channel.id()

experiments/simbricks/orchestration/system/base.py

@@ -35,11 +35,36 @@ class System(util_base.IdObj):
 
     def __init__(self) -> None:
         super().__init__()
-        self.all_component: list[Component] = []
+        self._all_components: dict[int, Component] = {}
+        self._all_interfaces: dict[int, Interface] = {}
+        self._all_channels: dict[int, Channel] = {}
 
-    def add_component(self, c: Component) -> None:
+    def _add_component(self, c: Component) -> None:
         assert c.system == self
-        self.all_component.append(c)
+        assert c.id() not in self._all_components
+        self._all_components[c.id()] = c
+
+    def get_comp(self, ident: int) -> Component:
+        assert ident in self._all_components
+        return self._all_components[ident]
+
+    def _add_interface(self, i: Interface) -> None:
+        assert i.component.id() in self._all_components
+        assert i.id() not in self._all_interfaces
+        self._all_interfaces[i.id()] = i
+
+    def get_inf(self, ident: int) -> Interface:
+        assert ident in self._all_interfaces
+        return self._all_interfaces[ident]
+
+    def _add_channel(self, c: Channel) -> None:
+        assert c.a.id() in self._all_interfaces and c.b.id() in self._all_interfaces
+        assert c.id() not in self._all_channels
+        self._all_channels[c.id()] = c
+
+    def get_chan(self, ident: int) -> Channel:
+        assert ident in self._all_channels
+        return self._all_channels[ident]
 
     def toJSON(self) -> dict:
         json_obj = super().toJSON()
@@ -47,19 +72,15 @@ class System(util_base.IdObj):
         json_obj["module"] = self.__class__.__module__
 
         components_json = []
-        channels: set[Channel] = set()
-        for comp in self.all_component:
+        for _, comp in self._all_components.items():
             util_base.has_attribute(comp, "toJSON")
             comp_json = comp.toJSON()
             components_json.append(comp_json)
 
-            for inf in comp.interfaces():
-                channels.add(inf.channel)
-
-        json_obj["all_component"] = components_json
+        json_obj["all_components"] = components_json
 
         channels_json = []
-        for chan in channels:
+        for _, chan in self._all_channels.items():
             util_base.has_attribute(chan, "toJSON")
             channels_json.append(chan.toJSON())
 
@@ -67,10 +88,26 @@ class System(util_base.IdObj):
 
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, json_obj: dict) -> System:
+        instance = super().fromJSON(json_obj)
+        instance._all_components = {}
+        instance._all_interfaces = {}
+        instance._all_channels = {}
+
+        components_json = util_base.get_json_attr_top(json_obj, "all_components")
+        for comp_json in components_json:
+            comp_class = util_base.get_cls_by_json(comp_json)
+            util_base.has_attribute(comp_class, "fromJSON")
+            comp = comp_class.fromJSON(instance, comp_json)
+
+        channels_json = util_base.get_json_attr_top(json_obj, "channels")
+        for chan_json in channels_json:
+            chan_class = util_base.get_cls_by_json(chan_json)
+            util_base.has_attribute(chan_class, "fromJSON")
+            chan = chan_class.fromJSON(instance, chan_json)
+
+        return instance
 
 
 class Component(util_base.IdObj):
@@ -78,17 +115,17 @@ class Component(util_base.IdObj):
     def __init__(self, s: System) -> None:
         super().__init__()
         self.system = s
+        self.ifs: list[Interface] = []
         s.parameters = {}
-        s.add_component(self)
-        self.name: str = ""
+        s._add_component(self)
+        self.name: str | None = None
 
-    @abc.abstractmethod
     def interfaces(self) -> list[Interface]:
-        return []
+        return self.ifs
 
-    @abc.abstractmethod
-    def add_if(self, interface: tp.Any) -> None:
-        raise Exception("must be overwritten by subclass")
+    # NOTE: overwrite and call in subclasses
+    def add_if(self, interface: Interface) -> None:
+        self.ifs.append(interface)
 
     def channels(self) -> list[Channel]:
         return [i.channel for i in self.interfaces() if i.is_connected()]
@@ -111,16 +148,29 @@ class Component(util_base.IdObj):
 
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: System, json_obj: dict) -> Component:
+        instance = super().fromJSON(json_obj)
+        instance.name = util_base.get_json_attr_top_or_none(json_obj, "name")
+        instance.system = system
+        system._add_component(instance)
+
+        instance.ifs = []
+        interfaces_json = util_base.get_json_attr_top(json_obj, "interfaces")
+        for inf_json in interfaces_json:
+            inf_class = util_base.get_cls_by_json(inf_json)
+            util_base.has_attribute(inf_class, "fromJSON")
+            # NOTE: this will add the interface to the system map for retrieval in sub-classes
+            inf = inf_class.fromJSON(system, inf_json)
+
+        return instance
 
 
 class Interface(util_base.IdObj):
     def __init__(self, c: Component) -> None:
         super().__init__()
         self.component = c
+        c.system._add_interface(self)
         self.channel: Channel | None = None
 
     def is_connected(self) -> bool:
@@ -130,7 +180,10 @@ class Interface(util_base.IdObj):
         self.channel = None
 
     def connect(self, c: Channel) -> None:
-        assert self.channel is None
+        if self.channel is not None:
+            raise Exception(
+                f"cannot connect interface {self.id()} to channel {c.id()}. interface is already connected to channel {self.channel.id()}"
+            )
         self.channel = c
 
     def find_peer(self) -> Interface:
@@ -164,10 +217,16 @@ class Interface(util_base.IdObj):
         json_obj["channel"] = self.channel.id()
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: System, json_obj: dict) -> Interface:
+        instance = super().fromJSON(json_obj)
+        comp_id = util_base.get_json_attr_top(json_obj, "component")
+        comp = system.get_comp(comp_id)
+        instance.component = comp
+        comp.add_if(instance)
+        system._add_interface(instance)
+        instance.channel = None
+        return instance
 
 
 class Channel(util_base.IdObj):
@@ -178,6 +237,7 @@ class Channel(util_base.IdObj):
         self.a.connect(self)
         self.b: Interface = b
         self.b.connect(self)
+        a.component.system._add_channel(self)
 
     def interfaces(self) -> list[Interface]:
         return [self.a, self.b]
@@ -206,7 +266,20 @@ class Channel(util_base.IdObj):
         json_obj["interface_b"] = self.b.id()
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: System, json_obj: dict) -> Channel:
+        instance = super().fromJSON(json_obj)
+        instance.latency = int(util_base.get_json_attr_top(json_obj, "latency"))
+
+        inf_id_a = int(util_base.get_json_attr_top(json_obj, "interface_a"))
+        inf_id_b = int(util_base.get_json_attr_top(json_obj, "interface_b"))
+        inf_a = system.get_inf(ident=inf_id_a)
+        inf_b = system.get_inf(ident=inf_id_b)
+        instance.a = inf_a
+        instance.a.connect(instance)
+        instance.b = inf_b
+        instance.b.connect(instance)
+
+        system._add_channel(instance)
+
+        return instance

experiments/simbricks/orchestration/system/eth.py

@@ -20,6 +20,8 @@
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+from __future__ import annotations
+
 from simbricks.orchestration.system import base
 from simbricks.orchestration.utils import base as utils_base
 
@@ -44,13 +46,20 @@ class EthSimpleNIC(base.Component):
         super().__init__(s)
         self._ip: str | None = None
         self._eth_if: EthInterface = EthInterface(self)
+        super().add_if(self._eth_if)
 
     def add_ipv4(self, ip: str) -> None:
         assert self._ip is None
         self._ip = ip
 
     def add_if(self, interface: EthInterface) -> None:
-        raise Exception("EthSimpleNIC already has ethernet interface")
+        utils_base.has_expected_type(interface, EthInterface)
+        if hasattr(self, "_eth_if") and self._eth_if:
+            raise Exception(
+                f"you overwrite EthSimpleNIC._eth_if ({self._eth_if.id()} -> {interface.id()}) "
+            )
+        self._eth_if = interface
+        super().add_if(self._eth_if)
 
     def toJSON(self) -> dict:
         json_obj = super().toJSON()
@@ -58,32 +67,29 @@ class EthSimpleNIC(base.Component):
         json_obj["eth_if"] = self._eth_if.id()
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: base.System, json_obj: dict) -> EthSimpleNIC:
+        instance = super().fromJSON(system, json_obj)
+        instance._ip = utils_base.get_json_attr_top(json_obj, "ip")
+        eth_inf_id = int(utils_base.get_json_attr_top(json_obj, "eth_if"))
+        instance._eth_if = system.get_inf(eth_inf_id)
+        return instance
+
 
 class BaseEthNetComponent(base.Component):
     def __init__(self, s: base.System) -> None:
         super().__init__(s)
-        self.eth_ifs: list[EthInterface] = []
 
     def add_if(self, i: EthInterface) -> None:
-        self.eth_ifs.append(i)
-
-    def interfaces(self) -> list[EthInterface]:
-        return self.eth_ifs
+        utils_base.has_expected_type(i, EthInterface)
+        super().add_if(i)
 
     def toJSON(self) -> dict:
-        json_obj = super().toJSON()
-        eth_interfaces = [inf.id() for inf in self.eth_ifs]
-        json_obj["eth_if"] = eth_interfaces
-        return json_obj
+        return super().toJSON()
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: base.System, json_obj: dict) -> BaseEthNetComponent:
+        return super().fromJSON(system, json_obj)
 
 
 class EthWire(BaseEthNetComponent):
@@ -91,9 +97,9 @@ class EthWire(BaseEthNetComponent):
         super().__init__(s)
 
     def add_if(self, i: EthInterface) -> None:
-        if len(self.eth_ifs) > 2:
+        if len(self.ifs) > 2:
             raise Exception("one can only add 2 interfaces to a EthWire")
-        self.eth_ifs.append(i)
+        super().add_if(i)
 
 
 class EthSwitch(BaseEthNetComponent):

experiments/simbricks/orchestration/system/host/app.py

@@ -27,6 +27,7 @@ import abc
 import io
 from simbricks.orchestration.instantiation import base as inst_base
 from simbricks.orchestration.utils import base as utils_base
+from simbricks.orchestration.system import base as sys_base
 
 if tp.TYPE_CHECKING:
     from simbricks.orchestration.system import host as sys_host
@@ -35,19 +36,21 @@ if tp.TYPE_CHECKING:
 class Application(utils_base.IdObj):
     def __init__(self, h: sys_host.Host) -> None:
         super().__init__()
-        self.host = h
+        self.host: sys_host.Host = h
 
     def toJSON(self) -> dict:
-        json_obj = {}
+        json_obj = super().toJSON()
         json_obj["type"] = self.__class__.__name__
         json_obj["module"] = self.__class__.__module__
         json_obj["host"] = self.host.id()
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict):
+        instance = super().fromJSON(json_obj)
+        host_id = utils_base.get_json_attr_top(json_obj, "host")
+        instance.host = system.get_comp(host_id)
+        return instance
 
 
 # Note AK: Maybe we can factor most of the duplicate calls with the host out
@@ -57,7 +60,7 @@ class BaseLinuxApplication(Application):
         super().__init__(h)
         self.start_delay: float | None = None
         self.end_delay: float | None = None
-        self.wait = False
+        self.wait: bool = False
 
     @abc.abstractmethod
     def run_cmds(self, inst: inst_base.Instantiation) -> list[str]:
@@ -109,16 +112,21 @@ class BaseLinuxApplication(Application):
         json_obj["wait"] = self.wait
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict):
+        instance = super().fromJSON(system, json_obj)
+        instance.start_delay = utils_base.get_json_attr_top_or_none(
+            json_obj, "start_delay"
+        )
+        instance.end_delay = utils_base.get_json_attr_top_or_none(json_obj, "end_delay")
+        instance.wait = utils_base.get_json_attr_top(json_obj, "wait")
+        return instance
 
 
 class PingClient(BaseLinuxApplication):
     def __init__(self, h: sys_host.LinuxHost, server_ip: str = "192.168.64.1") -> None:
         super().__init__(h)
-        self.server_ip = server_ip
+        self.server_ip: str = server_ip
 
     def run_cmds(self, inst: inst_base.Instantiation) -> tp.List[str]:
         return [f"ping {self.server_ip} -c 10"]
@@ -128,17 +136,20 @@ class PingClient(BaseLinuxApplication):
         json_obj["server_ip"] = self.server_ip
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict):
+        instance = super().fromJSON(system, json_obj)
+        instance.server_ip = utils_base.get_json_attr_top(json_obj, "server_ip")
+        return instance
 
 
 class Sleep(BaseLinuxApplication):
-    def __init__(self, h: sys_host.LinuxHost, delay: float = 10, infinite: bool = False) -> None:
+    def __init__(
+        self, h: sys_host.LinuxHost, delay: float = 10, infinite: bool = False
+    ) -> None:
         super().__init__(h)
         self.infinite: bool = infinite
-        self.delay = delay
+        self.delay: float = delay
 
     def run_cmds(self, inst: inst_base.Instantiation) -> list[str]:
         if self.infinite:
@@ -151,10 +162,12 @@ class Sleep(BaseLinuxApplication):
         json_obj["delay"] = self.delay
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict) -> Sleep:
+        instance = super().fromJSON(system, json_obj)
+        instance.infinite = bool(utils_base.get_json_attr_top(json_obj, "infinite"))
+        instance.delay = float(utils_base.get_json_attr_top(json_obj, "delay"))
+        return instance
 
 
 class NetperfServer(BaseLinuxApplication):
@@ -164,6 +177,10 @@ class NetperfServer(BaseLinuxApplication):
     def run_cmds(self, inst: inst_base.Instantiation) -> list[str]:
         return ["netserver", "sleep infinity"]
 
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict) -> NetperfServer:
+        return super().fromJSON(system, json_obj)
+
 
 class NetperfClient(BaseLinuxApplication):
     def __init__(self, h: sys_host.LinuxHost, server_ip: str = "192.168.64.1") -> None:
@@ -190,7 +207,14 @@ class NetperfClient(BaseLinuxApplication):
         json_obj["duration_lat"] = self.duration_lat
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict) -> NetperfClient:
+        instance = super().fromJSON(system, json_obj)
+        instance.server_ip = utils_base.get_json_attr_top(json_obj, "server_ip")
+        instance.duration_tp = int(
+            utils_base.get_json_attr_top(json_obj, "duration_tp")
+        )
+        instance.duration_lat = int(
+            utils_base.get_json_attr_top(json_obj, "duration_lat")
+        )
+        return instance

experiments/simbricks/orchestration/system/host/base.py

@@ -39,15 +39,8 @@ if tp.TYPE_CHECKING:
 class Host(base.Component):
     def __init__(self, s: base.System):
         super().__init__(s)
-        self.ifs: list[base.Interface] = []
         self.applications: list[app.Application] = []
 
-    def interfaces(self) -> list[base.Interface]:
-        return self.ifs
-    
-    def add_if(self, interface: base.Interface) -> None:
-        self.ifs.append(interface)
-
     def add_app(self, a: app.Application) -> None:
         self.applications.append(a)
 
@@ -56,24 +49,33 @@ class Host(base.Component):
 
         applications_json = []
         for app in self.applications:
-            utils_base.has_attribute(app, 'toJSON')
+            utils_base.has_attribute(app, "toJSON")
             applications_json.append(app.toJSON())
         json_obj["applications"] = applications_json
 
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: base.System, json_obj: dict) -> Host:
+        instance = super().fromJSON(system=system, json_obj=json_obj)
+        instance.applications = []
+
+        applications_json = utils_base.get_json_attr_top(json_obj, "applications")
+        for app_json in applications_json:
+            app_class = utils_base.get_cls_by_json(app_json)
+            utils_base.has_attribute(app_class, "fromJSON")
+            app = app_class.fromJSON(system, app_json)
+            instance.add_app(app)
+
+        return instance
 
 
 class FullSystemHost(Host):
     def __init__(self, s: base.System) -> None:
         super().__init__(s)
-        self.memory = 512
-        self.cores = 1
-        self.cpu_freq = "3GHz"
+        self.memory: int = 512
+        self.cores: int = 1
+        self.cpu_freq: str = "3GHz"
         self.disks: list[disk_images.DiskImage] = []
 
     def add_disk(self, disk: disk_images.DiskImage) -> None:
@@ -91,16 +93,28 @@ class FullSystemHost(Host):
 
         disks_json = []
         for disk in self.disks:
-            utils_base.has_attribute(disk, 'toJSON')
+            utils_base.has_attribute(disk, "toJSON")
             disks_json.append(disk.toJSON())
         json_obj["disks"] = disks_json
 
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: base.System, json_obj: dict) -> FullSystemHost:
+        instance = super().fromJSON(system, json_obj)
+        instance.memory = int(utils_base.get_json_attr_top(json_obj, "memory"))
+        instance.cores = int(utils_base.get_json_attr_top(json_obj, "cores"))
+        instance.cpu_freq = utils_base.get_json_attr_top(json_obj, "cpu_freq")
+
+        instance.disks = []
+        disks_json = utils_base.get_json_attr_top(json_obj, "disks")
+        for disk_js in disks_json:
+            disk_class = utils_base.get_cls_by_json(disk_js)
+            utils_base.has_attribute(disk_class, "fromJSON")
+            disk = disk_class.fromJSON(system, disk_js)
+            instance.add_disk(disk)
+
+        return instance
 
 
 class BaseLinuxHost(FullSystemHost):
@@ -207,10 +221,12 @@ class BaseLinuxHost(FullSystemHost):
         json_obj["kcmd_append"] = self.kcmd_append
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: base.System, json_obj: dict) -> BaseLinuxHost:
+        instance = super().fromJSON(system, json_obj)
+        instance.load_modules = utils_base.get_json_attr_top(json_obj, "load_modules")
+        instance.kcmd_append = utils_base.get_json_attr_top(json_obj, "kcmd_append")
+        return instance
 
 
 class LinuxHost(BaseLinuxHost):
@@ -282,10 +298,12 @@ class LinuxHost(BaseLinuxHost):
         json_obj["hostname"] = self.hostname
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: base.System, json_obj: dict) -> LinuxHost:
+        instance = super().fromJSON(system, json_obj)
+        instance.drivers = utils_base.get_json_attr_top(json_obj, "drivers")
+        instance.hostname = utils_base.get_json_attr_top(json_obj, "hostname")
+        return instance
 
 
 class I40ELinuxHost(LinuxHost):

experiments/simbricks/orchestration/system/host/disk_images.py

@@ -29,6 +29,7 @@ import tarfile
 import typing as tp
 from simbricks.orchestration.utils import base as utils_base
 from simbricks.orchestration.instantiation import base as inst_base
+from simbricks.orchestration.system import base as sys_base
 
 if tp.TYPE_CHECKING:
     from simbricks.orchestration.system import host as sys_host
@@ -85,17 +86,22 @@ class DiskImage(utils_base.IdObj):
         await self._prepare_format(inst, format)
 
     def toJSON(self) -> dict:
-        json_obj = {}
+        json_obj = super().toJSON()
         json_obj["type"] = self.__class__.__name__
         json_obj["module"] = self.__class__.__module__
         json_obj["host"] = self.host.id()
         json_obj["qemu_img_exec"] = self._qemu_img_exec
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict) -> DiskImage:
+        instance = super().fromJSON(json_obj)
+        host_id = int(utils_base.get_json_attr_top(json_obj, "host"))
+        instance.host = system.get_comp(host_id)
+        instance._qemu_img_exec = utils_base.get_json_attr_top(
+            json_obj, "qemu_img_exec"
+        )
+        return instance
 
 
 # Disk image where user just provides a path
@@ -118,10 +124,12 @@ class ExternalDiskImage(DiskImage):
         json_obj["formats"] = self.formats
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict) -> DiskImage:
+        instance = super().fromJSON(system, json_obj)
+        instance._path = utils_base.get_json_attr_top(json_obj, "path")
+        instance.formats = utils_base.get_json_attr_top(json_obj, "formats")
+        return instance
 
 
 # Disk images shipped with simbricks
@@ -151,10 +159,12 @@ class DistroDiskImage(DiskImage):
         json_obj["formats"] = self.formats
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict) -> DiskImage:
+        instance = super().fromJSON(system, json_obj)
+        instance.name = utils_base.get_json_attr_top(json_obj, "name")
+        instance.formats = utils_base.get_json_attr_top(json_obj, "formats")
+        return instance
 
 
 # Abstract base class for dynamically generated images
@@ -169,6 +179,10 @@ class DynamicDiskImage(DiskImage):
     async def _prepare_format(self, inst: inst_base.Instantiation, format: str) -> None:
         pass
 
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict) -> DynamicDiskImage:
+        return super().fromJSON(system, json_obj)
+
 
 # Builds the Tar with the commands to run etc.
 class LinuxConfigDiskImage(DynamicDiskImage):
@@ -206,6 +220,10 @@ class LinuxConfigDiskImage(DynamicDiskImage):
                 tar.addfile(tarinfo=f_i, fileobj=f)
                 f.close()
 
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict) -> LinuxConfigDiskImage:
+        return super().fromJSON(system, json_obj)
+
 
 # This is an additional example: building disk images directly from python
 # Could of course also have a version that generates the packer config from
@@ -227,7 +245,8 @@ class PackerDiskImage(DynamicDiskImage):
         json_obj["config_path"] = self.config_path
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: sys_base.System, json_obj: dict) -> PackerDiskImage:
+        instance = super().fromJSON(system, json_obj)
+        instance.config_path = utils_base.get_json_attr_top(json_obj, "config_path")
+        return instance

experiments/simbricks/orchestration/system/mem.py

@@ -20,6 +20,8 @@
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+from __future__ import annotations
+
 from simbricks.orchestration.system import base
 from simbricks.orchestration.utils import base as utils_base
 
@@ -38,7 +40,7 @@ class MemDeviceInterface(base.Interface):
     def connect(self, c: base.Channel) -> None:
         # Note AK: a bit ugly, but I think we can't get around a rt check here
         if not c is isinstance(c, MemChannel):
-            raise TypeError('MemDeviceInterface only connects to MemChannel')
+            raise TypeError("MemDeviceInterface only connects to MemChannel")
         super().connect(c)
 
 
@@ -57,17 +59,19 @@ class MemSimpleDevice(base.Component):
     def __init__(self, s: base.System):
         super().__init__(s)
         self._mem_if: MemDeviceInterface = MemDeviceInterface(c=self)
-        self._addr = 0xe000000000000000
+        super().add_if(self._mem_if)
+        self._addr = 0xE000000000000000
         self._size = 1024 * 1024 * 1024  # 1GB
         self._as_id = 0
 
-    def interfaces(self) -> list[base.Interface]:
-        return [self._mem_if]
-
     def add_if(self, interface: MemDeviceInterface) -> None:
-        utils_base.has_expected_type(obj=interface, expected_type=MemDeviceInterface)
-        assert self._mem_if is None
+        utils_base.has_expected_type(interface, MemDeviceInterface)
+        if self._mem_if:
+            raise Exception(
+                f"you overwrite MemDeviceInterface._mem_if ({self._mem_if.id()} -> {interface.id()}) "
+            )
         self._mem_if = interface
+        super().add_if(self._mem_if)
 
     def toJSON(self) -> dict:
         json_obj = super().toJSON()
@@ -77,7 +81,15 @@ class MemSimpleDevice(base.Component):
         json_obj["as_id"] = self._as_id
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: base.System, json_obj: dict) -> MemSimpleDevice:
+        instance = super().fromJSON(system, json_obj)
+        mem_if_id = int(utils_base.get_json_attr_top(json_obj, "mem_if"))
\ No newline at end of file
+        addr = utils_base.get_json_attr_top(json_obj, "addr")
+        size = utils_base.get_json_attr_top(json_obj, "size")
+        as_id = utils_base.get_json_attr_top(json_obj, "as_id")
+        instance.mem_if = system.get_inf(mem_if_id)
+        instance.addr = addr
+        instance.size = size
+        instance.as_id = as_id
+        return instance

experiments/simbricks/orchestration/system/nic.py

@@ -20,28 +20,65 @@
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+from __future__ import annotations
+
 from simbricks.orchestration.system import base
 from simbricks.orchestration.system import pcie
 from simbricks.orchestration.system import eth
+from simbricks.orchestration.utils import base as utils_base
 
 
-class SimplePCIeNIC(pcie.PCIeSimpleDevice, eth.EthSimpleNIC):
+class SimplePCIeNIC(base.Component):
     def __init__(self, s: base.System) -> None:
         super().__init__(s)
-
-    def interfaces(self) -> list[base.Interface]:
-        return [self._pci_if, self._eth_if]
+        self._ip: str | None = None
+        self._eth_if: eth.EthInterface = eth.EthInterface(self)
+        super().add_if(self._eth_if)
+        self._pci_if: pcie.PCIeDeviceInterface = pcie.PCIeDeviceInterface(self)
+        super().add_if(self._pci_if)
 
     def add_if(self, interface: eth.EthInterface | pcie.PCIeDeviceInterface) -> None:
         match interface:
             case eth.EthInterface():
-                eth.EthSimpleNIC.add_if(self, interface=interface)
+                if hasattr(self, "_eth_if") and self._eth_if:
+                    print(interface)
+                    print(self._eth_if)
+                    raise Exception(
+                        f"you overwrite SimplePCIeNIC._eth_if ({self._eth_if.id()} -> {interface.id()}) "
+                    )
+                self._eth_if = interface
             case pcie.PCIeDeviceInterface():
-                pcie.PCIeSimpleDevice.add_if(self, interface=interface)
+                if hasattr(self, "_pci_if") and self._pci_if:
+                    raise Exception(
+                        f"you overwrite SimplePCIeNIC._pci_if. ({self._pci_if.id()} -> {interface.id()})"
+                    )
+                self._pci_if = interface
             case _:
                 raise Exception(
                     f"interface must have type EthInterface or PCIeDeviceInterface but has type {type(interface)}"
                 )
+        super().add_if(interface)
+
+    def add_ipv4(self, ip: str) -> None:
+        assert self._ip is None
+        self._ip = ip
+
+    def toJSON(self) -> dict:
+        json_obj = super().toJSON()
+        json_obj["ip"] = self._ip
+        json_obj["eth_if"] = self._eth_if.id()
+        json_obj["pci_if"] = self._pci_if.id()
+        return json_obj
+
+    @classmethod
+    def fromJSON(cls, system: base.System, json_obj: dict) -> SimplePCIeNIC:
+        instance = super().fromJSON(system, json_obj)
+        instance._ip = utils_base.get_json_attr_top(json_obj, "ip")
+        eth_inf_id = int(utils_base.get_json_attr_top(json_obj, "eth_if"))
+        instance._eth_if = system.get_inf(eth_inf_id)
+        inf_id = int(utils_base.get_json_attr_top(json_obj, "pci_if"))
+        instance._pci_if = system.get_inf(inf_id)
+        return instance
 
 
 class IntelI40eNIC(SimplePCIeNIC):

experiments/simbricks/orchestration/system/pcie.py

@@ -20,6 +20,8 @@
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+from __future__ import annotations
+
 from simbricks.orchestration.system import base
 from simbricks.orchestration.utils import base as utils_base
 
@@ -57,19 +59,25 @@ class PCIeSimpleDevice(base.Component):
     def __init__(self, s: base.System):
         super().__init__(s)
         self._pci_if: PCIeDeviceInterface = PCIeDeviceInterface(self)
-
-    def interfaces(self) -> list[base.Interface]:
-        return [self._pci_if]
+        super().add_if(self._pci_if)
 
     def add_if(self, interface: PCIeDeviceInterface) -> None:
-        raise Exception("PCIeSimpleDevice already has PCI device interface")
+        utils_base.has_expected_type(interface, PCIeDeviceInterface)
+        if self._pci_if:
+            raise Exception(
+                f"you overwrite PCIeSimpleDevice._pci_if. ({self._pci_if.id()} -> {interface.id()})"
+            )
+        self._pci_if = interface
+        super().add_if(interface)
 
     def toJSON(self) -> dict:
         json_obj = super().toJSON()
         json_obj["pci_if"] = self._pci_if.id()
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, system: base.System, json_obj: dict) -> PCIeSimpleDevice:
+        instance = super().fromJSON(system=system, json_obj=json_obj)
+        inf_id = int(utils_base.get_json_attr_top(json_obj, "pci_if"))
\ No newline at end of file
+        instance._pci_if = system.get_inf(inf_id)
+        return instance

experiments/simbricks/orchestration/utils/base.py

@@ -22,6 +22,7 @@
 
 import abc
 import itertools
+import importlib
 
 
 class IdObj(abc.ABC):
@@ -38,10 +39,12 @@ class IdObj(abc.ABC):
         json_obj["id"] = self._id
         return json_obj
 
-    @staticmethod
-    def fromJSON(json_obj):
-        # TODO
-        pass
+    @classmethod
+    def fromJSON(cls, json_obj):
+        instance = cls.__new__(cls)
+        instance._id = get_json_attr_top(json_obj, "id")
+        return instance
+
 
 def check_type(obj, expected_type) -> bool:
     """
@@ -58,8 +61,40 @@ def has_expected_type(obj, expected_type) -> None:
             f"obj of type {type(obj)} has not the type or is not a subtype of {expected_type}"
         )
 
+
 def has_attribute(obj, attr: str) -> None:
     if not hasattr(obj, attr):
-        raise Exception(
-            f"obj of type {type(obj)} no attribute called {attr}"
-        )
+        raise Exception(f"obj of type {type(obj)} no attribute called {attr}")
+
+
+def get_json_attr_top_or_none(json_obj: dict, attr: str) -> dict | None:
+    if attr in json_obj:
+        return json_obj[attr]
+
+    return None
+
+
+def has_json_attr_top(json_obj: dict, attr: str) -> None:
+    if not attr in json_obj:
+        raise Exception(f"{json_obj} does not contain key {attr}")
+
+
+def get_json_attr_top(json_obj: dict, attr: str) -> dict:
+    has_json_attr_top(json_obj, attr)
+    return json_obj[attr]
+
+
+def get_cls_from_type_module(type_name: str, module_name: str):
+    # Import the module
+    module = importlib.import_module(module_name)
+
+    # Get the class from the module
+    cls = getattr(module, type_name)
+
+    return cls
+
+
+def get_cls_by_json(json_obj: dict):
+    type_name = get_json_attr_top(json_obj, "type")
+    module_name = get_json_attr_top(json_obj, "module")
+    return get_cls_from_type_module(type_name, module_name)