add export proto to parquet example

export_proto_to_parquet/LICENSE

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+MIT License
+
+Copyright (c) 2023 temporal.io
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

export_proto_to_parquet/README.md

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+# Temporal proto to parquet sample
+
+This is an example workflow to convert exported file from proto to parquet file. The workflow is an hourly schedule
+
+To use this code, make sure you have a [Temporal Cluster running](https://docs.temporal.io/docs/server/quick-install/) first.
+
+Create a virtual environment and activate it. On macOS and Linux, run these commands:
+
+```
+python3 -m venv env
+source env/bin/activate
+```
+
+On Windows, run these commands:
+
+```
+python -m venv env
+env\Scripts\activate
+```
+
+With the virtual environment configured, install the Temporal SDK:
+
+```
+python -m pip install temporalio
+python -m pip install pandas
+python -m pip install pyarrow
+python -m pip install boto3
+```
+
+
+Run the workflow:
+
+```bash
+python run_workflow.py
+```
+
+In another window, activate the virtual environment:
+
+On macOS or Linux, run this command:
+
+```
+source env/bin/activate
+```
+
+On Windows, run this command:
+
+```
+python -m venv env
+env\Scripts\activate
+```
+
+
+Then run the worker:
+
+
+```bash
+python run_worker.py
+```
+

export_proto_to_parquet/data_trans_activities.py

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+"""Module defines export s3 activities convert exported workflow history file from proto to parquet format."""
+
+import json
+import uuid
+
+import boto3
+import pandas as pd
+import temporalio.api.export.v1 as export
+from dataobject import DataTransAndLandActivitiyInput, GetObjectKeysActivityInput
+from google.protobuf.json_format import MessageToJson
+from temporalio import activity
+from typing import List
+
+class ExportS3Activities:
+    def __init__(self):
+        # Make sure you have the AWS credentials set up
+        self.s3 = boto3.client("s3")
+
+    @activity.defn
+    async def get_object_keys(
+        self, activity_input: GetObjectKeysActivityInput
+    ) -> List[str]:
+        """Function that list objects by key."""
+        response = self.s3.list_objects_v2(
+            Bucket=activity_input.bucket, Prefix=activity_input.path
+        )
+        object_keys = []
+        for obj in response.get("Contents", []):
+            object_keys.append(obj["Key"])
+
+        if len(object_keys) == 0:
+            raise FileNotFoundError(
+                f"No files found in {activity_input.bucket}/{activity_input.path}"
+            )
+
+        return object_keys
+
+    @activity.defn
+    async def data_trans_and_land(
+        self, activity_input: DataTransAndLandActivitiyInput
+    ) -> str:
+        """Function that convert proto to parquet and save to S3."""
+        key = activity_input.object_key
+        data = await self.get_data_from_object_key(activity_input.export_s3_bucket, key)
+        activity.logger.info("Convert proto to parquet for file: %s", key)
+        parquet_data = await self.convert_proto_to_parquet_flatten(data)
+        activity.logger.info("Finish transformation for file: %s", key)
+
+        return await self.save_to_sink(
+            parquet_data, activity_input.output_s3_bucket, activity_input.write_path
+        )
+
+    async def get_data_from_object_key(
+        self, bucket_name: str, object_key: str
+    ) -> export.WorkflowExecutions:
+        """Function that get object by key."""
+        v = export.WorkflowExecutions()
+        try:
+            data = self.s3.get_object(Bucket=bucket_name, Key=object_key)["Body"].read()
+        except Exception as e:
+            activity.logger.error(f"Error reading object: {e}")
+            raise e
+
+        v.ParseFromString(data)
+
+        return v
+
+    async def convert_proto_to_parquet_flatten(
+        self, wfs: export.WorkflowExecutions
+    ) -> pd.DataFrame:
+        """Function that convert flatten proto data to parquet."""
+        dfs = []
+        for wf in wfs.items:
+            start_attributes = wf.history.events[
+                0
+            ].workflow_execution_started_event_attributes
+            histories = wf.history
+            json_str = MessageToJson(histories)
+            row = {
+                "WorkflowID": start_attributes.workflow_id,
+                "RunID": start_attributes.original_execution_run_id,
+                "Histories": json.loads(json_str),
+            }
+            dfs.append(pd.DataFrame([row]))
+
+        df = pd.concat(dfs, ignore_index=True)
+
+        rows_flatten = []
+        for _, row in df.iterrows():
+            wf_histories_raw = row["Histories"]["events"]
+            worfkow_id = row["WorkflowID"]
+            run_id = row["RunID"]
+
+            for history_event in wf_histories_raw:
+                row_flatten = pd.json_normalize(history_event, sep="_")
+
+                skip_name = ["payloads", "."]
+                columns_to_drop = [
+                    col
+                    for col in row_flatten.columns
+                    for skip in skip_name
+                    if skip in col
+                ]
+                row_flatten.drop(columns_to_drop, axis=1, inplace=True)
+
+                row_flatten.insert(0, "WorkflowId", worfkow_id)
+                row_flatten.insert(1, "RunId", run_id)
+
+                rows_flatten.append(row_flatten)
+
+        df_flatten = pd.concat(rows_flatten, ignore_index=True)
+        return df_flatten
+
+    async def save_to_sink(
+        self, data: pd.DataFrame, s3_bucket: str, write_path: str
+    ) -> str:
+        """Function that save object to s3 bucket."""
+        write_bytes = data.to_parquet(None, compression="snappy", index=False)
+        s3 = boto3.client("s3")
+        uuid_name = uuid.uuid1()
+        file_name = f"{uuid_name}.parquet"
+        activity.logger.info("Writing to S3 bucket: %s", file_name)
+        try:
+            key = f"{write_path}/{file_name}"
+            s3.put_object(Bucket=s3_bucket, Key=key, Body=write_bytes)
+            return key
+        except Exception as e:
+            activity.logger.error(f"Error saving to sink: {e}")
+            raise e

export_proto_to_parquet/dataobject.py

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+from dataclasses import dataclass
+
+
+@dataclass
+class GetObjectKeysActivityInput:
+    bucket: str
+    path: str
+
+
+@dataclass
+class DataTransAndLandActivitiyInput:
+    export_s3_bucket: str
+    object_key: str
+    output_s3_bucket: str
+    write_path: str
+
+
+@dataclass
+class ProtoToParquetWorkflowInput:
+    num_delay_hour: int
+    export_s3_bucket: str
+    namespace: str
+    output_s3_bucket: str

export_proto_to_parquet/run_worker.py

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+"""Module defines temporal worker."""
+
+import asyncio
+
+from shared import DATA_TRANSFORMATION_TASK_QUEUE_NAME
+from temporalio.client import Client
+from temporalio.worker import Worker
+from temporalio.worker.workflow_sandbox import (
+    SandboxedWorkflowRunner,
+    SandboxRestrictions,
+)
+from workflows import ProtoToParquet
+
+from export_proto_to_parquet.activities import ExportS3Activities
+
+
+async def main() -> None:
+    """Main worker function."""
+    # Create client connected to server at the given address
+    client: Client = await Client.connect("localhost:7233", namespace="default")
+
+    # Run the worker
+    s3_activities = ExportS3Activities()
+    worker: Worker = Worker(
+        client,
+        task_queue=DATA_TRANSFORMATION_TASK_QUEUE_NAME,
+        workflows=[ProtoToParquet],
+        activities=[s3_activities.get_object_keys, s3_activities.data_trans_and_land],
+        workflow_runner=SandboxedWorkflowRunner(
+            restrictions=SandboxRestrictions.default.with_passthrough_modules("boto3")
+        ),
+    )
+    await worker.run()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

export_proto_to_parquet/run_workflow.py

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+"""Module defines run temporal workflow."""
+
+import asyncio
+import traceback
+from datetime import datetime, timedelta
+
+from dataobject import ProtoToParquetWorkflowInput
+from shared import DATA_TRANSFORMATION_TASK_QUEUE_NAME, WORKFLOW_ID_PREFIX
+from temporalio.client import (
+    Client,
+    Schedule,
+    ScheduleActionStartWorkflow,
+    ScheduleIntervalSpec,
+    ScheduleSpec,
+    WorkflowFailureError,
+)
+from workflows import ProtoToParquet
+
+
+async def main() -> None:
+    """Main function to run temporal workflow."""
+    # Create client connected to server at the given address
+    client: Client = await Client.connect("localhost:7233", namespace="default")
+    # TODO: update s3_bucket and namespace to the actual name
+    wf_input = ProtoToParquetWorkflowInput(
+        num_delay_hour=2,
+        export_s3_bucket="test-input-bucket",
+        namespace="test.namespace",
+        output_s3_bucket="test-output-bucket",
+    )
+
+    try:
+        await client.create_schedule(
+            "hourly-proto-to-parquet-wf-schedule",
+            Schedule(
+                action=ScheduleActionStartWorkflow(
+                    ProtoToParquet.run,
+                    wf_input,
+                    id=f"{WORKFLOW_ID_PREFIX}-{datetime.now()}",
+                    task_queue=DATA_TRANSFORMATION_TASK_QUEUE_NAME,
+                ),
+                spec=ScheduleSpec(
+                    intervals=[ScheduleIntervalSpec(every=timedelta(hours=1))]
+                ),
+            ),
+        )
+    except WorkflowFailureError:
+        print("Got exception: ", traceback.format_exc())
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

export_proto_to_parquet/shared.py

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+DATA_TRANSFORMATION_TASK_QUEUE_NAME = "DATA_TRANSFORMATION_TASK_QUEUE"
+WORKFLOW_ID_PREFIX = "proto-to-parquet"

export_proto_to_parquet/workflows.py

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+"""Module defines workflows convert exported workflow history file from proto to parquet format."""
+
+from datetime import timedelta
+
+from dataobject import ProtoToParquetWorkflowInput
+from temporalio import workflow
+from temporalio.common import RetryPolicy
+from temporalio.exceptions import ActivityError
+
+with workflow.unsafe.imports_passed_through():
+    from export_proto_to_parquet.data_trans_activities import (
+        DataTransAndLandActivitiyInput,
+        ExportS3Activities,
+        GetObjectKeysActivityInput,
+    )
+
+
+@workflow.defn
+class ProtoToParquet:
+    """Proto to parquet workflow."""
+
+    @workflow.run
+    async def run(self, workflow_input: ProtoToParquetWorkflowInput) -> str:
+        """Run proto to parquet workflow."""
+        retry_policy = RetryPolicy(
+            maximum_attempts=10, maximum_interval=timedelta(seconds=5)
+        )
+
+        # Read from export S3 bucket and given at least 2 hour delay to ensure the file has been uploaded
+        read_time = workflow.now() - timedelta(hours=workflow_input.num_delay_hour)
+        common_path = f"{workflow_input.namespace}/{read_time.year}/{read_time.month:02}/{read_time.day:02}/{read_time.hour:02}/00"
+        path = f"temporal-workflow-history/export/{common_path}"
+        get_object_keys_input = GetObjectKeysActivityInput(
+            workflow_input.export_s3_bucket, path
+        )
+
+        # Read Input File
+        object_keys_output = await workflow.execute_activity_method(
+            ExportS3Activities.get_object_keys,
+            get_object_keys_input,
+            start_to_close_timeout=timedelta(minutes=5),
+            retry_policy=retry_policy,
+        )
+
+        write_path = f"temporal-workflow-history/parquet/{common_path}"
+
+        try:
+            # Could spin up multiple threads to process files in parallel
+            for key in object_keys_output:
+                data_trans_and_land_input = DataTransAndLandActivitiyInput(
+                    workflow_input.export_s3_bucket,
+                    key,
+                    workflow_input.output_s3_bucket,
+                    write_path,
+                )
+                # Convert proto to parquet and save to S3
+                await workflow.execute_activity_method(
+                    ExportS3Activities.data_trans_and_land,
+                    data_trans_and_land_input,
+                    start_to_close_timeout=timedelta(minutes=10),
+                    retry_policy=retry_policy,
+                )
+        except ActivityError as output_err:
+            workflow.logger.error(f"Data transformation failed: {output_err}")
+            raise output_err
+
+        return write_path