io_struct.py

# Copyright 2023-2024 SGLang Team
# 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.
# ==============================================================================
"""
The definition of objects transferred between different
processes (TokenizerManager, DetokenizerManager, Controller).
"""

import copy
import uuid
from dataclasses import dataclass, field
from enum import Enum
from typing import TYPE_CHECKING, Any, Dict, List, Optional, Set, Union

from sglang.srt.managers.schedule_batch import BaseFinishReason
from sglang.srt.multimodal.mm_utils import has_valid_data
from sglang.srt.sampling.sampling_params import SamplingParams

# Handle serialization of Image for pydantic
if TYPE_CHECKING:
    from PIL.Image import Image
else:
    Image = Any


@dataclass
class SessionParams:
    id: Optional[str] = None
    rid: Optional[str] = None
    offset: Optional[int] = None
    replace: Optional[bool] = None


AudioDataItem = Union[str, Dict]
ImageDataItem = Union[Image, str, Dict]


@dataclass
class GenerateReqInput:
    # The input prompt. It can be a single prompt or a batch of prompts.
    text: Optional[Union[List[str], str]] = None
    # The token ids for text; one can specify either text or input_ids
    input_ids: Optional[Union[List[List[int]], List[int]]] = None
    # The embeddings for input_ids; one can specify either text or input_ids or input_embeds.
    input_embeds: Optional[Union[List[List[List[float]]], List[List[float]]]] = None
    # The image input. It can be an image instance, file name, URL, or base64 encoded string.
    # Can be formatted as:
    # - Single image for a single request
    # - List of images (one per request in a batch)
    # - List of lists of images (multiple images per request)
    # See also python/sglang/srt/utils.py:load_image for more details.
    image_data: Optional[
        Union[List[List[ImageDataItem]], List[ImageDataItem], ImageDataItem]
    ] = None
    # The audio input. Like image data, it can be a file name, a url, or base64 encoded string.
    audio_data: Optional[Union[List[AudioDataItem], AudioDataItem]] = None
    # The sampling_params. See descriptions below.
    sampling_params: Optional[Union[List[Dict], Dict]] = None
    # The request id.
    rid: Optional[Union[List[str], str]] = None
    # Whether to return logprobs.
    return_logprob: Optional[Union[List[bool], bool]] = None
    # If return logprobs, the start location in the prompt for returning logprobs.
    # By default, this value is "-1", which means it will only return logprobs for output tokens.
    logprob_start_len: Optional[Union[List[int], int]] = None
    # If return logprobs, the number of top logprobs to return at each position.
    top_logprobs_num: Optional[Union[List[int], int]] = None
    # If return logprobs, the token ids to return logprob for.
    token_ids_logprob: Optional[Union[List[List[int]], List[int]]] = None
    # Whether to detokenize tokens in text in the returned logprobs.
    return_text_in_logprobs: bool = False
    # Whether to stream output.
    stream: bool = False
    # Whether to log metrics for this request (e.g. health_generate calls do not log metrics)
    log_metrics: bool = True

    # The modalities of the image data [image, multi-images, video]
    modalities: Optional[List[str]] = None
    # The path to the LoRA
    lora_path: Optional[Union[List[Optional[str]], Optional[str]]] = None

    # Session info for continual prompting
    session_params: Optional[Union[List[Dict], Dict]] = None

    # Custom logit processor for advanced sampling control. Must be a serialized instance
    # of `CustomLogitProcessor` in python/sglang/srt/sampling/custom_logit_processor.py
    # Use the processor's `to_str()` method to generate the serialized string.
    custom_logit_processor: Optional[Union[List[Optional[str]], str]] = None

    # Whether to return hidden states
    return_hidden_states: Union[List[bool], bool] = False

    # For disaggregated inference
    bootstrap_host: Optional[Union[List[str], str]] = None
    bootstrap_port: Optional[Union[List[Optional[int]], int]] = None
    bootstrap_room: Optional[Union[List[int], int]] = None

    # For data parallel rank routing
    data_parallel_rank: Optional[int] = None

    def contains_mm_input(self) -> bool:
        return has_valid_data(self.image_data) or has_valid_data(self.audio_data)

    def normalize_batch_and_arguments(self):
        """
        Normalize the batch size and arguments for the request.

        This method resolves various input formats and ensures all parameters
        are properly formatted as either single values or batches depending on the input.
        It also handles parallel sampling expansion and sets default values for
        unspecified parameters.

        Raises:
            ValueError: If inputs are not properly specified (e.g., none or all of
                       text, input_ids, input_embeds are provided)
        """
        self._validate_inputs()
        self._determine_batch_size()
        self._handle_parallel_sampling()

        if self.is_single:
            self._normalize_single_inputs()
        else:
            self._normalize_batch_inputs()

        self._validate_session_params()

    def _validate_inputs(self):
        """Validate that the input configuration is valid."""
        if (
            self.text is None and self.input_ids is None and self.input_embeds is None
        ) or (
            self.text is not None
            and self.input_ids is not None
            and self.input_embeds is not None
        ):
            raise ValueError(
                "Either text, input_ids or input_embeds should be provided."
            )

    def _determine_batch_size(self):
        """Determine if this is a single example or a batch and the batch size."""
        if self.text is not None:
            if isinstance(self.text, str):
                self.is_single = True
                self.batch_size = 1
            else:
                self.is_single = False
                self.batch_size = len(self.text)
            self.input_embeds = None
        elif self.input_ids is not None:
            if len(self.input_ids) == 0:
                raise ValueError("input_ids cannot be empty.")
            if isinstance(self.input_ids[0], int):
                self.is_single = True
                self.batch_size = 1
            else:
                self.is_single = False
                self.batch_size = len(self.input_ids)
            self.input_embeds = None
        else:
            if isinstance(self.input_embeds[0][0], float):
                self.is_single = True
                self.batch_size = 1
            else:
                self.is_single = False
                self.batch_size = len(self.input_embeds)

    def _handle_parallel_sampling(self):
        """Handle parallel sampling parameters and adjust batch size if needed."""
        # Determine parallel sample count
        if self.sampling_params is None:
            self.parallel_sample_num = 1
            return
        elif isinstance(self.sampling_params, dict):
            self.parallel_sample_num = self.sampling_params.get("n", 1)
        else:  # isinstance(self.sampling_params, list):
            self.parallel_sample_num = self.sampling_params[0].get("n", 1)
            for sampling_params in self.sampling_params:
                if self.parallel_sample_num != sampling_params.get("n", 1):
                    raise ValueError(
                        "The parallel_sample_num should be the same for all samples in sample params."
                    )

        # If using parallel sampling with a single example, convert to batch
        if self.parallel_sample_num > 1 and self.is_single:
            self.is_single = False
            if self.text is not None:
                self.text = [self.text]
            if self.input_ids is not None:
                self.input_ids = [self.input_ids]

    def _normalize_single_inputs(self):
        """Normalize inputs for a single example."""
        if self.sampling_params is None:
            self.sampling_params = {}
        if self.rid is None:
            self.rid = uuid.uuid4().hex
        if self.return_logprob is None:
            self.return_logprob = False
        if self.logprob_start_len is None:
            self.logprob_start_len = -1
        if self.top_logprobs_num is None:
            self.top_logprobs_num = 0
        if not self.token_ids_logprob:  # covers both None and []
            self.token_ids_logprob = None

    def _normalize_batch_inputs(self):
        """Normalize inputs for a batch of examples, including parallel sampling expansion."""
        # Calculate expanded batch size
        if self.parallel_sample_num == 1:
            num = self.batch_size
        else:
            # Expand parallel_sample_num
            num = self.batch_size * self.parallel_sample_num

        # Expand input based on type
        self._expand_inputs(num)
        self._normalize_rid(num)
        self._normalize_lora_paths(num)
        self._normalize_image_data(num)
        self._normalize_audio_data(num)
        self._normalize_sampling_params(num)
        self._normalize_logprob_params(num)
        self._normalize_custom_logit_processor(num)

    def _expand_inputs(self, num):
        """Expand the main inputs (text, input_ids, input_embeds) for parallel sampling."""
        if self.text is not None:
            if not isinstance(self.text, list):
                raise ValueError("Text should be a list for batch processing.")
            self.text = self.text * self.parallel_sample_num
        elif self.input_ids is not None:
            if not isinstance(self.input_ids, list) or not isinstance(
                self.input_ids[0], list
            ):
                raise ValueError(
                    "input_ids should be a list of lists for batch processing."
                )
            self.input_ids = self.input_ids * self.parallel_sample_num
        elif self.input_embeds is not None:
            if not isinstance(self.input_embeds, list):
                raise ValueError("input_embeds should be a list for batch processing.")
            self.input_embeds = self.input_embeds * self.parallel_sample_num

    def _normalize_lora_paths(self, num):
        """Normalize LoRA paths for batch processing."""
        if self.lora_path is not None:
            if isinstance(self.lora_path, str):
                self.lora_path = [self.lora_path] * num
            elif isinstance(self.lora_path, list):
                self.lora_path = self.lora_path * self.parallel_sample_num
            else:
                raise ValueError("lora_path should be a list or a string.")

    def _normalize_image_data(self, num):
        """Normalize image data for batch processing."""
        if self.image_data is None:
            self.image_data = [None] * num
        elif not isinstance(self.image_data, list):
            # Single image, convert to list of single-image lists
            self.image_data = [[self.image_data]] * num
            self.modalities = ["image"] * num
        elif isinstance(self.image_data, list):
            if len(self.image_data) != self.batch_size:
                raise ValueError(
                    "The length of image_data should be equal to the batch size."
                )

            self.modalities = []
            if len(self.image_data) > 0 and isinstance(self.image_data[0], list):
                # Already a list of lists, keep as is
                for i in range(len(self.image_data)):
                    if self.image_data[i] is None or self.image_data[i] == [None]:
                        self.modalities.append(None)
                    elif len(self.image_data[i]) == 1:
                        self.modalities.append("image")
                    elif len(self.image_data[i]) > 1:
                        self.modalities.append("multi-images")
                # Expand parallel_sample_num
                self.image_data = self.image_data * self.parallel_sample_num
                self.modalities = self.modalities * self.parallel_sample_num
            else:
                # List of images for a batch, wrap each in a list
                wrapped_images = [[img] for img in self.image_data]
                # Expand for parallel sampling
                self.image_data = wrapped_images * self.parallel_sample_num
                self.modalities = ["image"] * num

    def _normalize_audio_data(self, num):
        """Normalize audio data for batch processing."""
        if self.audio_data is None:
            self.audio_data = [None] * num
        elif not isinstance(self.audio_data, list):
            self.audio_data = [self.audio_data] * num
        elif isinstance(self.audio_data, list):
            self.audio_data = self.audio_data * self.parallel_sample_num

    def _normalize_sampling_params(self, num):
        """Normalize sampling parameters for batch processing."""
        if self.sampling_params is None:
            self.sampling_params = [{}] * num
        elif isinstance(self.sampling_params, dict):
            self.sampling_params = [self.sampling_params] * num
        else:  # Already a list
            self.sampling_params = self.sampling_params * self.parallel_sample_num

    def _normalize_rid(self, num):
        """Normalize request IDs for batch processing."""
        if self.rid is None:
            self.rid = [uuid.uuid4().hex for _ in range(num)]
        elif isinstance(self.rid, str):
            new_rids = [f"{self.rid}_{i}" for i in range(num)]
            self.rid = new_rids
        elif isinstance(self.rid, list):
            if len(self.rid) != num:
                raise ValueError(
                    "The specified rids length mismatch with the batch_size for batch processing."
                )
        else:
            raise ValueError("The rid should be a string or a list of strings.")

    def _normalize_logprob_params(self, num):
        """Normalize logprob-related parameters for batch processing."""

        # Helper function to normalize a parameter
        def normalize_param(param, default_value, param_name):
            if param is None:
                return [default_value] * num
            elif not isinstance(param, list):
                return [param] * num
            else:
                if self.parallel_sample_num > 1:
                    raise ValueError(
                        f"Cannot use list {param_name} with parallel_sample_num > 1"
                    )
                return param

        # Normalize each logprob parameter
        self.return_logprob = normalize_param(
            self.return_logprob, False, "return_logprob"
        )
        self.logprob_start_len = normalize_param(
            self.logprob_start_len, -1, "logprob_start_len"
        )
        self.top_logprobs_num = normalize_param(
            self.top_logprobs_num, 0, "top_logprobs_num"
        )

        # Handle token_ids_logprob specially due to its nested structure
        if not self.token_ids_logprob:  # covers both None and []
            self.token_ids_logprob = [None] * num
        elif not isinstance(self.token_ids_logprob, list):
            self.token_ids_logprob = [[self.token_ids_logprob] for _ in range(num)]
        elif not isinstance(self.token_ids_logprob[0], list):
            self.token_ids_logprob = [
                copy.deepcopy(self.token_ids_logprob) for _ in range(num)
            ]
        elif self.parallel_sample_num > 1:
            raise ValueError(
                "Cannot use list token_ids_logprob with parallel_sample_num > 1"
            )

    def _normalize_custom_logit_processor(self, num):
        """Normalize custom logit processor for batch processing."""
        if self.custom_logit_processor is None:
            self.custom_logit_processor = [None] * num
        elif not isinstance(self.custom_logit_processor, list):
            self.custom_logit_processor = [self.custom_logit_processor] * num
        elif self.parallel_sample_num > 1:
            raise ValueError(
                "Cannot use list custom_logit_processor with parallel_sample_num > 1"
            )

    def _validate_session_params(self):
        """Validate that session parameters are properly formatted."""
        if self.session_params is not None:
            if not isinstance(self.session_params, dict) and not isinstance(
                self.session_params[0], dict
            ):
                raise ValueError("Session params must be a dict or a list of dicts.")

    def regenerate_rid(self):
        """Generate a new request ID and return it."""
        self.rid = uuid.uuid4().hex
        return self.rid

    def __getitem__(self, i):
        return GenerateReqInput(
            text=self.text[i] if self.text is not None else None,
            input_ids=self.input_ids[i] if self.input_ids is not None else None,
            image_data=self.image_data[i],
            audio_data=self.audio_data[i],
            sampling_params=self.sampling_params[i],
            rid=self.rid[i],
            return_logprob=self.return_logprob[i],
            logprob_start_len=self.logprob_start_len[i],
            top_logprobs_num=self.top_logprobs_num[i],
            token_ids_logprob=self.token_ids_logprob[i],
            return_text_in_logprobs=self.return_text_in_logprobs,
            stream=self.stream,
            log_metrics=self.log_metrics,
            modalities=self.modalities[i] if self.modalities else None,
            lora_path=self.lora_path[i] if self.lora_path is not None else None,
            custom_logit_processor=(
                self.custom_logit_processor[i]
                if self.custom_logit_processor is not None
                else None
            ),
            return_hidden_states=(
                self.return_hidden_states[i]
                if isinstance(self.return_hidden_states, list)
                else self.return_hidden_states
            ),
            # if `__getitem__` is called, the bootstrap_host, bootstrap_port, bootstrap_room must be a list
            bootstrap_host=(
                self.bootstrap_host[i] if self.bootstrap_host is not None else None
            ),
            bootstrap_port=(
                self.bootstrap_port[i] if self.bootstrap_port is not None else None
            ),
            bootstrap_room=(
                self.bootstrap_room[i] if self.bootstrap_room is not None else None
            ),
            data_parallel_rank=(
                self.data_parallel_rank if self.data_parallel_rank is not None else None
            ),
        )


@dataclass
class TokenizedGenerateReqInput:
    # The request id
    rid: str
    # The input text
    input_text: str
    # The input token ids
    input_ids: List[int]
    # The multimodal inputs
    mm_inputs: dict
    # The sampling parameters
    sampling_params: SamplingParams
    # Whether to return the logprobs
    return_logprob: bool
    # If return logprobs, the start location in the prompt for returning logprobs.
    logprob_start_len: int
    # If return logprobs, the number of top logprobs to return at each position.
    top_logprobs_num: int
    # If return logprobs, the token id to return logprob for
    token_ids_logprob: List[int]
    # Whether to stream output
    stream: bool

    # LoRA related
    lora_path: Optional[str] = None  # None means just use the base model
    # The input embeds
    input_embeds: Optional[Union[List[List[List[float]]], List[List[float]]]] = None

    # Session info for continual prompting
    session_params: Optional[SessionParams] = None

    # Custom logit processor for advanced sampling control. Must be a serialized instance
    # of `CustomLogitProcessor` in python/sglang/srt/sampling/custom_logit_processor.py
    # Use the processor's `to_str()` method to generate the serialized string.
    custom_logit_processor: Optional[str] = None

    # Whether to return hidden states
    return_hidden_states: bool = False

    # For disaggregated inference
    bootstrap_host: Optional[str] = None
    bootstrap_port: Optional[int] = None
    bootstrap_room: Optional[int] = None

    # For data parallel rank routing
    data_parallel_rank: Optional[int] = None


@dataclass
class EmbeddingReqInput:
    # The input prompt. It can be a single prompt or a batch of prompts.
    text: Optional[Union[List[List[str]], List[str], str]] = None
    # The image input. It can be an image instance, file name, URL, or base64 encoded string.
    # Can be formatted as:
    # - Single image for a single request
    # - List of images (one per request in a batch)
    # - List of lists of images (multiple images per request)
    # See also python/sglang/srt/utils.py:load_image for more details.
    image_data: Optional[
        Union[List[List[Union[Image, str]]], List[Union[Image, str]], Union[Image, str]]
    ] = None
    # The audio input. Like image data, it can be a file name, a url, or base64 encoded string.
    audio_data: Optional[Union[List[str], str]] = None
    # The token ids for text; one can either specify text or input_ids.
    input_ids: Optional[Union[List[List[int]], List[int]]] = None
    # The request id.
    rid: Optional[Union[List[str], str]] = None
    # Dummy sampling params for compatibility
    sampling_params: Union[List[Dict], Dict] = None
    # Dummy input embeds for compatibility
    input_embeds: Optional[Union[List[List[List[float]]], List[List[float]]]] = None
    # Whether to log metrics for this request (e.g. health_generate calls do not log metrics)
    log_metrics: bool = True
    # The modalities of the image data [image, multi-images, video]
    modalities: Optional[List[str]] = None
    # For cross-encoder requests
    is_cross_encoder_request: bool = False

    def normalize_batch_and_arguments(self):
        # at least one of text, input_ids, or image should be provided
        if self.text is None and self.input_ids is None and self.image_data is None:
            raise ValueError(
                "At least one of text, input_ids, or image should be provided"
            )

        # text and input_ids cannot be provided at the same time
        if self.text is not None and self.input_ids is not None:
            raise ValueError("text and input_ids cannot be provided at the same time")

        # Derive the batch size
        self.batch_size = 0
        self.is_single = True

        # check the batch size of text
        if self.text is not None:
            if isinstance(self.text, list):
                self.batch_size += len(self.text)
                self.is_single = False
            else:
                self.batch_size += 1

        # check the batch size of input_ids
        if self.input_ids is not None:
            if isinstance(self.input_ids[0], list):
                self.batch_size += len(self.input_ids)
                self.is_single = False
            else:
                self.batch_size += 1

        # Fill in default arguments
        if self.is_single:
            if self.rid is None:
                self.rid = uuid.uuid4().hex
            if self.sampling_params is None:
                self.sampling_params = {}
            self.sampling_params["max_new_tokens"] = 0
        else:
            if self.rid is None:
                self.rid = [uuid.uuid4().hex for _ in range(self.batch_size)]
            else:
                assert isinstance(self.rid, list), "The rid should be a list."

            if self.sampling_params is None:
                self.sampling_params = [{}] * self.batch_size
            for i in range(self.batch_size):
                self.sampling_params[i]["max_new_tokens"] = 0

    def regenerate_rid(self):
        self.rid = uuid.uuid4().hex
        return self.rid

    def contains_mm_input(self) -> bool:
        return has_valid_data(self.image_data) or has_valid_data(self.audio_data)

    def __getitem__(self, i):
        if self.is_cross_encoder_request:
            return EmbeddingReqInput(
                text=[self.text[i]] if self.text is not None else None,
                input_ids=None,
                image_data=None,
                sampling_params=self.sampling_params[i],
                rid=self.rid[i],
                is_cross_encoder_request=True,
            )

        return EmbeddingReqInput(
            text=self.text[i] if self.text is not None else None,
            input_ids=self.input_ids[i] if self.input_ids is not None else None,
            image_data=self.image_data[i] if self.image_data is not None else None,
            sampling_params=self.sampling_params[i],
            rid=self.rid[i],
        )


@dataclass
class TokenizedEmbeddingReqInput:
    # The request id
    rid: str
    # The input text
    input_text: str
    # The input token ids
    input_ids: List[int]
    # The image inputs
    image_inputs: dict
    # The token type ids
    token_type_ids: List[int]
    # Dummy sampling params for compatibility
    sampling_params: SamplingParams


@dataclass
class BatchTokenIDOut:
    # The request id
    rids: List[str]
    # The finish reason
    finished_reasons: List[BaseFinishReason]
    # For incremental decoding
    decoded_texts: List[str]
    decode_ids: List[int]
    read_offsets: List[int]
    # Only used when `--skip-tokenizer-init` is on
    output_ids: Optional[List[int]]
    # Detokenization configs
    skip_special_tokens: List[bool]
    spaces_between_special_tokens: List[bool]
    no_stop_trim: List[bool]

    # Token counts
    prompt_tokens: List[int]
    completion_tokens: List[int]
    cached_tokens: List[int]
    spec_verify_ct: List[int]

    # Logprobs
    input_token_logprobs_val: List[float]
    input_token_logprobs_idx: List[int]
    output_token_logprobs_val: List[float]
    output_token_logprobs_idx: List[int]
    input_top_logprobs_val: List[List]
    input_top_logprobs_idx: List[List]
    output_top_logprobs_val: List[List]
    output_top_logprobs_idx: List[List]
    input_token_ids_logprobs_val: List[List]
    input_token_ids_logprobs_idx: List[List]
    output_token_ids_logprobs_val: List[List]
    output_token_ids_logprobs_idx: List[List]

    # Hidden states
    output_hidden_states: List[List[float]]


@dataclass
class BatchMultimodalDecodeReq:
    # The request id
    rids: List[str]
    finished_reasons: List[BaseFinishReason]

    # Token counts
    prompt_tokens: List[int]
    completion_tokens: List[int]
    cached_tokens: List[int]


@dataclass
class BatchStrOut:
    # The request id
    rids: List[str]
    # The finish reason
    finished_reasons: List[dict]
    # The output decoded strings
    output_strs: List[str]
    # The token ids
    output_ids: Optional[List[int]]

    # Token counts
    prompt_tokens: List[int]
    completion_tokens: List[int]
    cached_tokens: List[int]
    spec_verify_ct: List[int]

    # Logprobs
    input_token_logprobs_val: List[float]
    input_token_logprobs_idx: List[int]
    output_token_logprobs_val: List[float]
    output_token_logprobs_idx: List[int]
    input_top_logprobs_val: List[List]
    input_top_logprobs_idx: List[List]
    output_top_logprobs_val: List[List]
    output_top_logprobs_idx: List[List]
    input_token_ids_logprobs_val: List[List]
    input_token_ids_logprobs_idx: List[List]
    output_token_ids_logprobs_val: List[List]
    output_token_ids_logprobs_idx: List[List]

    # Hidden states
    output_hidden_states: List[List[float]]


@dataclass
class BatchMultimodalOut:
    # The request id
    rids: List[str]
    # The finish reason
    finished_reasons: List[dict]
    # The outputs
    outputs: List[List[Dict]]

    # Token counts
    prompt_tokens: List[int]
    completion_tokens: List[int]
    cached_tokens: List[int]


@dataclass
class BatchEmbeddingOut:
    # The request id
    rids: List[str]
    # The finish reason
    finished_reasons: List[BaseFinishReason]
    # The output embedding
    embeddings: List[List[float]]
    # Token counts
    prompt_tokens: List[int]
    cached_tokens: List[int]


@dataclass
class FlushCacheReqInput:
    pass


@dataclass
class FlushCacheReqOutput:
    success: bool


@dataclass
class UpdateWeightFromDiskReqInput:
    # The model path with the new weights
    model_path: str
    # The format to load the weights
    load_format: Optional[str] = None
    # Whether to abort all requests before updating weights
    abort_all_requests: bool = False


@dataclass
class UpdateWeightFromDiskReqOutput:
    success: bool
    message: str
    # Number of paused requests during weight sync.
    num_paused_requests: Optional[int] = 0


@dataclass
class UpdateWeightsFromDistributedReqInput:
    names: List[str]
    dtypes: List[str]
    shapes: List[List[int]]
    # The group name
    group_name: str = "weight_update_group"
    # Whether to flush the cache after updating weights
    flush_cache: bool = True
    # Whether to abort all requests before updating weights
    abort_all_requests: bool = False


@dataclass
class UpdateWeightsFromDistributedReqOutput:
    success: bool
    message: str


@dataclass
class UpdateWeightsFromTensorReqInput:
    """Update model weights from tensor input.

    - Tensors are serialized for transmission
    - Data is structured in JSON for easy transmission over HTTP
    """

    serialized_named_tensors: List[Union[str, bytes]]
    # Optional format specification for loading
    load_format: Optional[str] = None
    # Whether to flush the cache after updating weights
    flush_cache: bool = True
    # Whether to abort all requests before updating weights
    abort_all_requests: bool = False


@dataclass
class UpdateWeightsFromTensorReqOutput:
    success: bool
    message: str


@dataclass
class InitWeightsUpdateGroupReqInput:
    # The master address
    master_address: str
    # The master port
    master_port: int
    # The rank offset
    rank_offset: int
    # The world size
    world_size: int
    # The group name
    group_name: str = "weight_update_group"
    # The backend
    backend: str = "nccl"


@dataclass
class InitWeightsUpdateGroupReqOutput:
    success: bool
    message: str


@dataclass
class GetWeightsByNameReqInput:
    name: str
    truncate_size: int = 100


@dataclass
class GetWeightsByNameReqOutput:
    parameter: list


@dataclass
class ReleaseMemoryOccupationReqInput:
    # Optional tags to identify the memory region, which is primarily used for RL
    # Currently we only support `weights` and `kv_cache`
    tags: Optional[List[str]] = None


@dataclass
class ReleaseMemoryOccupationReqOutput:
    pass


@dataclass
class ResumeMemoryOccupationReqInput:
    # Optional tags to identify the memory region, which is primarily used for RL
    # Currently we only support `weights` and `kv_cache`
    tags: Optional[List[str]] = None


@dataclass
class ResumeMemoryOccupationReqOutput:
    pass


@dataclass
class SlowDownReqInput:
    forward_sleep_time: Optional[float]


@dataclass
class SlowDownReqOutput:
    pass


@dataclass
class AbortReq:
    # The request id
    rid: str = ""
    # Whether to abort all requests
    abort_all: bool = False


@dataclass
class GetInternalStateReq:
    pass


@dataclass
class GetInternalStateReqOutput:
    internal_state: Dict[Any, Any]


@dataclass
class SetInternalStateReq:
    server_args: Dict[str, Any]


@dataclass
class SetInternalStateReqOutput:
    updated: bool
    server_args: Dict[str, Any]


@dataclass
class ProfileReqInput:
    # The output directory
    output_dir: Optional[str] = None
    # If set, it profile as many as this number of steps.
    # If it is set, profiling is automatically stopped after this step, and
    # the caller doesn't need to run stop_profile.
    num_steps: Optional[int] = None
    activities: Optional[List[str]] = None
    profile_by_stage: bool = False
    with_stack: Optional[bool] = None
    record_shapes: Optional[bool] = None


class ProfileReqType(Enum):
    START_PROFILE = 1
    STOP_PROFILE = 2


class ExpertDistributionReq(Enum):
    START_RECORD = 1
    STOP_RECORD = 2
    DUMP_RECORD = 3


@dataclass
class ExpertDistributionReqOutput:
    pass


@dataclass
class ProfileReq:
    type: ProfileReqType
    output_dir: Optional[str] = None
    num_steps: Optional[int] = None
    activities: Optional[List[str]] = None
    profile_by_stage: bool = False
    with_stack: Optional[bool] = None
    record_shapes: Optional[bool] = None
    profile_id: Optional[str] = None


@dataclass
class ProfileReqOutput:
    success: bool
    message: str


@dataclass
class ConfigureLoggingReq:
    log_requests: Optional[bool] = None
    log_requests_level: Optional[int] = None
    dump_requests_folder: Optional[str] = None
    dump_requests_threshold: Optional[int] = None


@dataclass
class OpenSessionReqInput:
    capacity_of_str_len: int
    session_id: Optional[str] = None


@dataclass
class CloseSessionReqInput:
    session_id: str


@dataclass
class OpenSessionReqOutput:
    session_id: Optional[str]
    success: bool


@dataclass
class HealthCheckOutput:
    pass


@dataclass
class Function:
    description: Optional[str] = None
    name: Optional[str] = None
    parameters: Optional[object] = None


@dataclass
class Tool:
    function: Function
    type: Optional[str] = "function"


@dataclass
class ParseFunctionCallReq:
    text: str  # The text to parse.
    tools: List[Tool] = field(
        default_factory=list
    )  # A list of available function tools (name, parameters, etc.).
    tool_call_parser: Optional[str] = (
        None  # Specify the parser type, e.g. 'llama3', 'qwen25', or 'mistral'. If not specified, tries all.
    )


@dataclass
class SeparateReasoningReqInput:
    text: str  # The text to parse.
    reasoning_parser: str  # Specify the parser type, e.g., "deepseek-r1".


@dataclass
class VertexGenerateReqInput:
    instances: List[dict]
    parameters: Optional[dict] = None


@dataclass
class RpcReqInput:
    method: str
    parameters: Optional[Dict] = None


@dataclass
class RpcReqOutput:
    success: bool
    message: str


@dataclass
class LoadLoRAAdapterReqInput:
    # The name of the lora module to newly loaded.
    lora_name: str
    # The path of loading.
    lora_path: str


@dataclass
class UnloadLoRAAdapterReqInput:
    # The name of lora module to unload.
    lora_name: str


@dataclass
class LoRAUpdateResult:
    success: bool
    error_message: Optional[str] = None
    loaded_adapters: Dict[str, str] = field(default_factory=dict)


LoadLoRAAdapterReqOutput = UnloadLoRAAdapterReqOutput = LoRAUpdateResult