Gerenciar instâncias em funções duráveis no Azure

[FunctionName("HelloWorldQueueTrigger")]
public static async Task Run(
    [QueueTrigger("start-queue")] string input,
    [DurableClient] IDurableOrchestrationClient starter,
    ILogger log)
{
    string instanceId = await starter.StartNewAsync("HelloWorld", input);
    log.LogInformation($"Started orchestration with ID = '{instanceId}'.");
}

A menos que especificado de outra forma, os exemplos nesta página usam o gatilho HTTP com o seguinte function.json.

function.json

{
  "bindings": [
    {
      "name": "req",
      "type": "httpTrigger",
      "direction": "in",
      "methods": ["post"]
    },
    {
      "name": "$return",
      "type": "http",
      "direction": "out"
    },
    {
      "name": "starter",
      "type": "durableClient",
      "direction": "in"
    }
  ],
  "disabled": false
}

index.js

const df = require("durable-functions");

module.exports = async function(context, input) {
    const client = df.getClient(context);

    const instanceId = await client.startNew("HelloWorld", undefined, input);
    context.log(`Started orchestration with ID = ${instanceId}.`);
};

A menos que especificado de outra forma, os exemplos nesta página usam o gatilho HTTP com o seguinte function.json.

function.json

{
  "scriptFile": "__init__.py",
  "bindings": [    
    {
      "name": "req",
      "type": "httpTrigger",
      "direction": "in",
      "methods": ["post"]
    },
    {
      "name": "$return",
      "type": "http",
      "direction": "out"
    },
    {
      "name": "starter",
      "type": "durableClient",
      "direction": "in"
    }
  ],
  "disabled": false
}

__init__.py

import logging
import azure.functions as func
import azure.durable_functions as df

async def main(req: func.HttpRequest, starter: str) -> func.HttpResponse:
    client = df.DurableOrchestrationClient(starter)
    
    instance_id = await client.start_new('HelloWorld', None, None)
    logging.log(f"Started orchestration with ID = ${instance_id}.")

A menos que especificado de outra forma, os exemplos nesta página usam o gatilho HTTP com o seguinte function.json.

function.json

{
  "bindings": [    
    {
      "name": "Request",
      "type": "httpTrigger",
      "direction": "in",
      "methods": ["post"]
    },
    {
      "name": "Response",
      "type": "http",
      "direction": "out"
    },
    {
      "name": "starter",
      "type": "durableClient",
      "direction": "in"
    }
  ],
  "disabled": false
}

run.ps1

param($Request, $TriggerMetadata)

$InstanceId = Start-DurableOrchestration -FunctionName 'HelloWorld'
Write-Host "Started orchestration with ID = '$InstanceId'"

@FunctionName("HelloWorldQueueTrigger")
public void helloWorldQueueTrigger(
        @QueueTrigger(name = "input", queueName = "start-queue", connection = "Storage") String input,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext,
        final ExecutionContext context) {
    DurableTaskClient client = durableContext.getClient();        
    String instanceID = client.scheduleNewOrchestrationInstance("HelloWorld");
    context.getLogger().info("Scheduled orchestration with ID = " + instanceID);
}

Se você quiser esperar que o orquestrador comece antes de retornar da sua função, você também pode usar o waitForInstanceStart() método.

// wait up to 30 seconds for the scheduled orchestration to enter the "Running" state
client.waitForInstanceStart(instanceID, Duration.ofSeconds(30));

[FunctionName("GetStatus")]
public static async Task Run(
    [DurableClient] IDurableOrchestrationClient client,
    [QueueTrigger("check-status-queue")] string instanceId)
{
    DurableOrchestrationStatus status = await client.GetStatusAsync(instanceId);
    // do something based on the current status.
}

const df = require("durable-functions");

module.exports = async function(context, instanceId) {
    const client = df.getClient(context);

    const status = await client.getStatus(instanceId);
    // do something based on the current status.
    // example: if status.runtimeStatus === df.OrchestrationRuntimeStatus.Running: ...
}

Consulte Iniciar instâncias para a configuração function.json.

import azure.functions as func
import azure.durable_functions as df

async def main(req: func.HttpRequest, starter: str, instance_id: str) -> func.HttpResponse:
    client = df.DurableOrchestrationClient(starter)

    status = await client.get_status(instance_id)
    # do something based on the current status
    # example: if (existing_instance.runtime_status is df.OrchestrationRuntimeStatus.Running) { ...

param($Request, $TriggerMetadata)

# Get instanceid from body
$InstanceId = $Request.Body.InstanceId

$Status = Get-DurableStatus -InstanceId $InstanceId -ShowHistory -ShowHistoryOutput -ShowInput
Write-Host "Status: $($Status | ConvertTo-Json)"

# Do something based on status
# example: if ($Status.runtimeStatus -eq 'Running') { ... }

@FunctionName("GetStatus")
public void getStatus(
        @QueueTrigger(name = "instanceID", queueName = "check-status-queue", connection = "Storage") String instanceID,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext,
        final ExecutionContext context) {
    DurableTaskClient client = durableContext.getClient();        
    OrchestrationMetadata metadata = client.getInstanceMetadata(instanceID, false);
    if (metadata != null) {
        OrchestrationRuntimeStatus status = metadata.getRuntimeStatus();
        switch (status) {
            // do something based on the current status
        }
    }
}

[FunctionName("GetAllStatus")]
public static async Task Run(
    [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post")] HttpRequestMessage req,
    [DurableClient] IDurableOrchestrationClient client,
    ILogger log)
{
    var noFilter = new OrchestrationStatusQueryCondition();
    OrchestrationStatusQueryResult result = await client.ListInstancesAsync(
        noFilter,
        CancellationToken.None);
    foreach (DurableOrchestrationStatus instance in result.DurableOrchestrationState)
    {
        log.LogInformation(JsonConvert.SerializeObject(instance));
    }
    
    // Note: ListInstancesAsync only returns the first page of results.
    // To request additional pages provide the result.ContinuationToken
    // to the OrchestrationStatusQueryCondition's ContinuationToken property.
}

const df = require("durable-functions");

module.exports = async function(context, req) {
    const client = df.getClient(context);

    const instances = await client.getStatusAll();
    instances.forEach((instance) => {
        context.log(JSON.stringify(instance));
    });
};

Consulte Iniciar instâncias para a configuração function.json.

import logging
import json
import azure.functions as func
import azure.durable_functions as df


async def main(req: func.HttpRequest, starter: str) -> func.HttpResponse:
    client = df.DurableOrchestrationClient(starter)

    instances = await client.get_status_all()

    for instance in instances:
        logging.log(json.dumps(instance))

Consulte Iniciar instâncias para a configuração function.json.

@FunctionName("GetAllStatus")
public String getAllStatus(
        @HttpTrigger(name = "req", methods = {HttpMethod.GET}) HttpRequestMessage<?> req,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext) {
    DurableTaskClient client = durableContext.getClient();
    OrchestrationStatusQuery noFilter = new OrchestrationStatusQuery();
    OrchestrationStatusQueryResult result = client.queryInstances(noFilter);
    return "Found " + result.getOrchestrationState().size() + " orchestrations.";
}

[FunctionName("QueryStatus")]
public static async Task Run(
    [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post")] HttpRequestMessage req,
    [DurableClient] IDurableOrchestrationClient client,
    ILogger log)
{
    // Get the first 100 running or pending instances that were created between 7 and 1 day(s) ago
    var queryFilter = new OrchestrationStatusQueryCondition
    {
        RuntimeStatus = new[]
        {
            OrchestrationRuntimeStatus.Pending,
            OrchestrationRuntimeStatus.Running,
        },
        CreatedTimeFrom = DateTime.UtcNow.Subtract(TimeSpan.FromDays(7)),
        CreatedTimeTo = DateTime.UtcNow.Subtract(TimeSpan.FromDays(1)),
        PageSize = 100,
    };
    
    OrchestrationStatusQueryResult result = await client.ListInstancesAsync(
        queryFilter,
        CancellationToken.None);
    foreach (DurableOrchestrationStatus instance in result.DurableOrchestrationState)
    {
        log.LogInformation(JsonConvert.SerializeObject(instance));
    }
}

const df = require("durable-functions");

module.exports = async function(context, req) {
    const client = df.getClient(context);

    const runtimeStatus = [
        df.OrchestrationRuntimeStatus.Completed,
        df.OrchestrationRuntimeStatus.Running,
    ];
    const instances = await client.getStatusBy(
        new Date(2021, 3, 10, 10, 1, 0),
        new Date(2021, 3, 10, 10, 23, 59),
        runtimeStatus
    );
    instances.forEach((instance) => {
        context.log(JSON.stringify(instance));
    });
};

Consulte Iniciar instâncias para a configuração function.json.

import logging
from datetime import datetime
import json
import azure.functions as func
import azure.durable_functions as df
from azure.durable_functions.models.OrchestrationRuntimeStatus import OrchestrationRuntimeStatus

async def main(req: func.HttpRequest, starter: str) -> func.HttpResponse:
    client = df.DurableOrchestrationClient(starter)

    runtime_status = [OrchestrationRuntimeStatus.Completed, OrchestrationRuntimeStatus.Running]

    instances = await client.get_status_by(
        datetime(2021, 3, 10, 10, 1, 0),
        datetime(2021, 3, 10, 10, 23, 59),
        runtime_status
    )

    for instance in instances:
        logging.log(json.dumps(instance))

@FunctionName("GetRunningInstances")
public String getRunningInstances(
        @HttpTrigger(name = "req", methods = {HttpMethod.GET}) HttpRequestMessage<?> req,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext) {
    DurableTaskClient client = durableContext.getClient();
    OrchestrationStatusQuery filter = new OrchestrationStatusQuery()
        .setRuntimeStatusList(List.of(OrchestrationRuntimeStatus.PENDING, OrchestrationRuntimeStatus.RUNNING))
        .setCreatedTimeFrom(Instant.now().minus(Duration.ofDays(7)))
        .setCreatedTimeTo(Instant.now().minus(Duration.ofDays(1)));
    OrchestrationStatusQueryResult result = client.queryInstances(filter);
    return "Found " + result.getOrchestrationState().size() + " orchestrations.";
}

[FunctionName("TerminateInstance")]
public static Task Run(
    [DurableClient] IDurableOrchestrationClient client,
    [QueueTrigger("terminate-queue")] string instanceId)
{
    string reason = "Found a bug";
    return client.TerminateAsync(instanceId, reason);
}

const df = require("durable-functions");

module.exports = async function(context, instanceId) {
    const client = df.getClient(context);

    const reason = "Found a bug";
    return client.terminate(instanceId, reason);
};

Consulte Iniciar instâncias para a configuração function.json.

import azure.functions as func
import azure.durable_functions as df

async def main(req: func.HttpRequest, starter: str, instance_id: str) -> func.HttpResponse:
    client = df.DurableOrchestrationClient(starter)

    reason = "Found a bug"
    return await client.terminate(instance_id, reason)

param($Request, $TriggerMetadata)

# Get instance id from body
$InstanceId = $Request.Body.InstanceId
$Reason = 'Found a bug'

Stop-DurableOrchestration -InstanceId $InstanceId -Reason $Reason

@FunctionName("TerminateInstance")
public void terminateInstance(
        @HttpTrigger(name = "req", methods = {HttpMethod.POST}) HttpRequestMessage<String> req,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext) {
    String instanceID = req.getBody();
    String reason = "Found a bug";
    durableContext.getClient().terminate(instanceID, reason);
}

[FunctionName("SuspendResumeInstance")]
public static async Task Run(
    [DurableClient] IDurableOrchestrationClient client,
    [QueueTrigger("suspend-resume-queue")] string instanceId)
{
    string suspendReason = "Need to pause workflow";
    await client.SuspendAsync(instanceId, suspendReason);
    
    // Wait for 30 seconds to ensure that the orchestrator state is updated to suspended. 
    DateTime dueTime = context.CurrentUtcDateTime.AddSeconds(30);
    await context.CreateTimer(dueTime, CancellationToken.None);
    
    string resumeReason = "Continue workflow";
    await client.ResumeAsync(instanceId, resumeReason);
}

const df = require("durable-functions");

module.exports = async function(context, instanceId) {
    const client = df.getClient(context);

    const suspendReason = "Need to pause workflow";
    await client.suspend(instanceId, suspendReason);

    // Wait for 30 seconds to ensure that the orchestrator state is updated to suspended.  
    const deadline = DateTime.fromJSDate(context.df.currentUtcDateTime, {zone: 'utc'}).plus({ seconds: 30 });
    yield context.df.createTimer(deadline.toJSDate());

    const resumeReason = "Continue workflow";
    await client.resume(instanceId, resumeReason);
};

import azure.functions as func
import azure.durable_functions as df
from datetime import timedelta

async def main(req: func.HttpRequest, starter: str, instance_id: str):
    client = df.DurableOrchestrationClient(starter)

    suspend_reason = "Need to pause workflow"
    await client.suspend(instance_id, suspend_reason)

    # Wait for 30 seconds to ensure that the orchestrator state is updated to suspended. 
    due_time = context.current_utc_datetime + timedelta(seconds=30)
    yield context.create_timer(due_time)

    resume_reason = "Continue workflow"
    await client.resume(instance_id, resume_reason)

param($Request, $TriggerMetadata)

# Get instance id from body
$InstanceId = $Request.Body.InstanceId
$SuspendReason = 'Need to pause workflow'

Suspend-DurableOrchestration -InstanceId $InstanceId -Reason $SuspendReason

# Wait for 30 seconds to ensure that the orchestrator state is updated to suspended.
$duration = New-TimeSpan -Seconds 30
Start-DurableTimer -Duration $duration

$ResumeReason = 'Continue workflow'
Resume-DurableOrchestration -InstanceId $InstanceId -Reason $ResumeReason

@FunctionName("SuspendResumeInstance")
public void suspendResumeInstance(
        @HttpTrigger(name = "req", methods = {HttpMethod.POST}) HttpRequestMessage<String> req,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext) {
    String instanceID = req.getBody();
    DurableTaskClient client = durableContext.getClient();  
    String suspendReason = "Need to pause workflow";
    client.suspendInstance(instanceID, suspendReason);

    // Wait for 30 seconds to ensure that the orchestrator state is updated to suspended. 
    ctx.createTimer(Duration.ofSeconds(30)).await();

    String resumeReason = "Continue workflow";
    client.getClient().resumeInstance(instanceID, resumeReason);
}

[FunctionName("RaiseEvent")]
public static Task Run(
    [DurableClient] IDurableOrchestrationClient client,
    [QueueTrigger("event-queue")] string instanceId)
{
    int[] eventData = new int[] { 1, 2, 3 };
    return client.RaiseEventAsync(instanceId, "MyEvent", eventData);
}

const df = require("durable-functions");

module.exports = async function(context, instanceId) {
    const client = df.getClient(context);

    const eventData = [ 1, 2, 3 ];
    return client.raiseEvent(instanceId, "MyEvent", eventData);
};

Consulte Iniciar instâncias para a configuração function.json.

import azure.functions as func
import azure.durable_functions as df

async def main(req: func.HttpRequest, starter: str, instance_id: str) -> func.HttpResponse:
    client = df.DurableOrchestrationClient(starter)

    event_data = [1, 2 ,3]
    return await client.raise_event(instance_id, 'MyEvent', event_data)

param($Request, $TriggerMetadata)

# Get instance id from body
$InstanceId = $Request.Body.InstanceId
$EventName = 'MyEvent'
$EventData = @(1,2,3)

Send-DurableExternalEvent -InstanceId $InstanceId -EventName $EventName -EventData $EventData

@FunctionName("RaiseEvent")
public void raiseEvent(
        @HttpTrigger(name = "req", methods = {HttpMethod.POST}) HttpRequestMessage<String> req,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext) {
    String instanceID = req.getBody();
    String eventName = "MyEvent";
    int[] eventData = { 1, 2, 3 };
    durableContext.getClient().raiseEvent(instanceID, eventName, eventData);
}

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the MIT License. See LICENSE in the project root for license information.

using System;
using System.Net.Http;
using System.Threading.Tasks;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.DurableTask;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Extensions.Logging;

namespace VSSample
{
    public static class HttpSyncStart
    {
        private const string Timeout = "timeout";
        private const string RetryInterval = "retryInterval";

        [FunctionName("HttpSyncStart")]
        public static async Task<HttpResponseMessage> Run(
            [HttpTrigger(AuthorizationLevel.Function, methods: "post", Route = "orchestrators/{functionName}/wait")]
            HttpRequestMessage req,
            [DurableClient] IDurableOrchestrationClient starter,
            string functionName,
            ILogger log)
        {
            // Function input comes from the request content.
            object eventData = await req.Content.ReadAsAsync<object>();
            string instanceId = await starter.StartNewAsync(functionName, eventData);

            log.LogInformation($"Started orchestration with ID = '{instanceId}'.");

            TimeSpan timeout = GetTimeSpan(req, Timeout) ?? TimeSpan.FromSeconds(30);
            TimeSpan retryInterval = GetTimeSpan(req, RetryInterval) ?? TimeSpan.FromSeconds(1);
            
            return await starter.WaitForCompletionOrCreateCheckStatusResponseAsync(
                req,
                instanceId,
                timeout,
                retryInterval);
        }

        private static TimeSpan? GetTimeSpan(HttpRequestMessage request, string queryParameterName)
        {
            string queryParameterStringValue = request.RequestUri.ParseQueryString()[queryParameterName];
            if (string.IsNullOrEmpty(queryParameterStringValue))
            {
                return null;
            }

            return TimeSpan.FromSeconds(double.Parse(queryParameterStringValue));
        }
    }
}

const df = require("durable-functions");

const timeout = "timeout";
const retryInterval = "retryInterval";

module.exports = async function (context, req) {
    const client = df.getClient(context);
    const instanceId = await client.startNew(req.params.functionName, undefined, req.body);

    context.log(`Started orchestration with ID = '${instanceId}'.`);

    const timeoutInMilliseconds = getTimeInSeconds(req, timeout) || 30000;
    const retryIntervalInMilliseconds = getTimeInSeconds(req, retryInterval) || 1000;

    const response = client.waitForCompletionOrCreateCheckStatusResponse(
        context.bindingData.req,
        instanceId,
        timeoutInMilliseconds,
        retryIntervalInMilliseconds
    );
    return response;
};

function getTimeInSeconds(req, queryParameterName) {
    const queryValue = req.query[queryParameterName];
    return queryValue
        ? queryValue * 1000 // expected to be in seconds
        : undefined;
}

Consulte Iniciar instâncias para a configuração function.json.

import logging
import azure.functions as func
import azure.durable_functions as df

timeout = "timeout"
retry_interval = "retryInterval"

async def main(req: func.HttpRequest, starter: str) -> func.HttpResponse:
    client = df.DurableOrchestrationClient(starter)

    instance_id = await client.start_new(req.route_params['functionName'], None, req.get_body())
    logging.log(f"Started orchestration with ID = '${instance_id}'.")

    timeout_in_milliseconds = get_time_in_seconds(req, timeout)
    timeout_in_milliseconds = timeout_in_milliseconds if timeout_in_milliseconds != None else 30000
    retry_interval_in_milliseconds = get_time_in_seconds(req, retry_interval)
    retry_interval_in_milliseconds = retry_interval_in_milliseconds if retry_interval_in_milliseconds != None else 1000

    return await client.wait_for_completion_or_create_check_status_response(
        req,
        instance_id,
        timeout_in_milliseconds,
        retry_interval_in_milliseconds
    )

def get_time_in_seconds(req: func.HttpRequest, query_parameter_name: str):
    query_value = req.params.get(query_parameter_name)
    return query_value if query_value != None else 1000

Atualmente, o Java não tem um único método para esse cenário. No entanto, ele pode ser implementado usando algumas linhas extras de código.

@FunctionName("HttpStartAndWait")
public HttpResponseMessage httpStartAndWait(
        @HttpTrigger(name = "req", route = "orchestrators/{functionName}/wait", methods = {HttpMethod.POST}) HttpRequestMessage<?> req,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext,
        @BindingName("functionName") String functionName,
        final ExecutionContext context) {

    DurableTaskClient client = durableContext.getClient();
    String instanceId = client.scheduleNewOrchestrationInstance(functionName);
    context.getLogger().info("Created new Java orchestration with instance ID = " + instanceId);
    try {
        String timeoutString = req.getQueryParameters().get("timeout");
        Integer timeoutInSeconds = Integer.parseInt(timeoutString);
        OrchestrationMetadata orchestration = client.waitForInstanceCompletion(
                instanceId,
                Duration.ofSeconds(timeoutInSeconds),
                true /* getInputsAndOutputs */);
        return req.createResponseBuilder(HttpStatus.OK)
                .body(orchestration.getSerializedOutput())
                .header("Content-Type", "application/json")
                .build();
    } catch (TimeoutException timeoutEx) {
        // timeout expired - return a 202 response
        return durableContext.createCheckStatusResponse(req, instanceId);
    }
}

[FunctionName("SendInstanceInfo")]
public static void SendInstanceInfo(
    [ActivityTrigger] IDurableActivityContext ctx,
    [DurableClient] IDurableOrchestrationClient client,
    [CosmosDB(
        databaseName: "MonitorDB",
        containerName: "HttpManagementPayloads",
        Connection = "CosmosDBConnectionSetting")]out dynamic document)
{
    HttpManagementPayload payload = client.CreateHttpManagementPayload(ctx.InstanceId);

    // send the payload to Azure Cosmos DB
    document = new { Payload = payload, id = ctx.InstanceId };
}

const df = require("durable-functions");

modules.exports = async function(context, ctx) {
    const client = df.getClient(context);

    const payload = client.createHttpManagementPayload(ctx.instanceId);

    // send the payload to Azure Cosmos DB
    context.bindings.document = JSON.stringify({
        id: ctx.instanceId,
        payload,
    });
};

Consulte Iniciar instâncias para a configuração function.json.

import azure.functions as func
import azure.durable_functions as df

async def main(req: func.HttpRequest, starter: str, instance_id: str) -> func.cosmosdb.cdb.Document:
    client = df.DurableOrchestrationClient(starter)

    payload = client.create_check_status_response(req, instance_id).get_body().decode()

    return func.cosmosdb.CosmosDBConverter.encode({
        id: instance_id,
        payload: payload
    })

using namespace System.Net

param($Request, $TriggerMetadata)

$InstanceId = $Request.Body.InstanceId
$Response = New-DurableOrchestrationCheckStatusResponse -Request $Request -InstanceId $InstanceId
Push-OutputBinding -Name Response -Value $Response

[FunctionName("RewindInstance")]
public static Task Run(
    [DurableClient] IDurableOrchestrationClient client,
    [QueueTrigger("rewind-queue")] string instanceId)
{
    string reason = "Orchestrator failed and needs to be revived.";
    return client.RewindAsync(instanceId, reason);
}

const df = require("durable-functions");

module.exports = async function(context, instanceId) {
    const client = df.getClient(context);

    const reason = "Orchestrator failed and needs to be revived.";
    return client.rewind(instanceId, reason);
};

Consulte Iniciar instâncias para a configuração function.json.

[FunctionName("PurgeInstanceHistory")]
public static Task Run(
    [DurableClient] IDurableOrchestrationClient client,
    [QueueTrigger("purge-queue")] string instanceId)
{
    return client.PurgeInstanceHistoryAsync(instanceId);
}

const df = require("durable-functions");

module.exports = async function(context, instanceId) {
    const client = df.getClient(context);
    return client.purgeInstanceHistory(instanceId);
};

Consulte Iniciar instâncias para a configuração function.json.

import azure.functions as func
import azure.durable_functions as df

async def main(req: func.HttpRequest, starter: str, instance_id: str) -> func.HttpResponse:
    client = df.DurableOrchestrationClient(starter)

    return await client.purge_instance_history(instance_id)

@FunctionName("PurgeInstance")
public HttpResponseMessage purgeInstance(
        @HttpTrigger(name = "req", methods = {HttpMethod.POST}, route = "purge/{instanceID}") HttpRequestMessage<?> req,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext,
        @BindingName("instanceID") String instanceID) {
    PurgeResult result = durableContext.getClient().purgeInstance(instanceID);
    if (result.getDeletedInstanceCount() == 0) {
        return req.createResponseBuilder(HttpStatus.NOT_FOUND)
                .body("No completed instance with ID '" + instanceID + "' was found!")
                .build();
    } else {
        return req.createResponseBuilder(HttpStatus.OK)
                .body("Successfully purged data for " + instanceID)
                .build();
    }
}

[FunctionName("PurgeInstanceHistory")]
public static Task Run(
    [DurableClient] IDurableOrchestrationClient client,
    [TimerTrigger("0 0 12 * * *")] TimerInfo myTimer)
{
    return client.PurgeInstanceHistoryAsync(
        DateTime.MinValue,
        DateTime.UtcNow.AddDays(-30),  
        new List<OrchestrationStatus>
        {
            OrchestrationStatus.Completed
        });
}

O purgeInstanceHistoryBy método pode ser usado para limpar condicionalmente o histórico de instâncias de várias instâncias.

function.json

{
  "bindings": [
    {
      "schedule": "0 0 12 * * *",
      "name": "myTimer",
      "type": "timerTrigger",
      "direction": "in"
    },
    {
      "name": "starter",
      "type": "durableClient",
      "direction": "in"
    }
  ],
  "disabled": false
}

index.js

const df = require("durable-functions");

module.exports = async function (context, myTimer) {
    const client = df.getClient(context);
    const createdTimeFrom = new Date(0);
    const createdTimeTo = new Date().setDate(today.getDate() - 30);
    const runtimeStatuses = [ df.OrchestrationRuntimeStatus.Completed ];
    return client.purgeInstanceHistoryBy(createdTimeFrom, createdTimeTo, runtimeStatuses);
};

import azure.functions as func
import azure.durable_functions as df
from azure.durable_functions.models.DurableOrchestrationStatus import OrchestrationRuntimeStatus
from datetime import datetime, timedelta

async def main(req: func.HttpRequest, starter: str, instance_id: str) -> func.HttpResponse:
    client = df.DurableOrchestrationClient(starter)
    created_time_from = datetime.min
    created_time_to = datetime.today() + timedelta(days = -30)
    runtime_statuses = [OrchestrationRuntimeStatus.Completed]

    return await client.purge_instance_history_by(created_time_from, created_time_to, runtime_statuses)

@FunctionName("PurgeInstances")
public void purgeInstances(
        @TimerTrigger(name = "purgeTimer", schedule = "0 0 12 * * *") String timerInfo,
        @DurableClientInput(name = "durableContext") DurableClientContext durableContext,
        ExecutionContext context) throws TimeoutException {
    PurgeInstanceCriteria criteria = new PurgeInstanceCriteria()
            .setCreatedTimeFrom(Instant.now().minus(Duration.ofDays(60)))
            .setCreatedTimeTo(Instant.now().minus(Duration.ofDays(30)))
            .setRuntimeStatusList(List.of(OrchestrationRuntimeStatus.COMPLETED));
    PurgeResult result = durableContext.getClient().purgeInstances(criteria);
    context.getLogger().info(String.format("Purged %d instance(s)", result.getDeletedInstanceCount()));
}