Rebalancing Genesys Cloud Outbound Campaign Lead Distributions with Go

What You Will Build

A Go service that programmatically adjusts outbound campaign lead distribution weights, validates payloads against dialer engine constraints, executes atomic updates, and synchronizes changes with external CRM systems. The code uses the Genesys Cloud CX Outbound Campaign APIs and the official Go SDK. The implementation covers Go.

Prerequisites

• OAuth Client Credentials grant type
• Required scopes: outbound:campaign:write outbound:campaign:read outbound:dnc:read webhook:write
• Go 1.21 or later
• Dependencies: github.com/genesyscloud/go-genesyscloud, github.com/go-playground/validator/v10, encoding/json, net/http, time, fmt, log
• A Genesys Cloud organization with Outbound licensing and at least one active campaign

Authentication Setup

Genesys Cloud uses OAuth 2.0 Client Credentials for server-to-server integrations. The following function retrieves an access token and caches it until expiration. It handles token refresh automatically.

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"time"
)

type TokenResponse struct {
	AccessToken string `json:"access_token"`
	ExpiresIn   int    `json:"expires_in"`
}

func FetchAccessToken(clientID, clientSecret, baseURL string) (string, error) {
	payload := fmt.Sprintf("client_id=%s&client_secret=%s&grant_type=client_credentials", clientID, clientSecret)
	req, err := http.NewRequestWithContext(context.Background(), http.MethodPost, fmt.Sprintf("%s/oauth/token", baseURL), nil)
	if err != nil {
		return "", fmt.Errorf("failed to create auth request: %w", err)
	}
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	req.SetBasicAuth(clientID, clientSecret)

	client := &http.Client{Timeout: 10 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		return "", fmt.Errorf("auth request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return "", fmt.Errorf("auth failed with status %d", resp.StatusCode)
	}

	var tokenResp TokenResponse
	if err := json.NewDecoder(resp.Body).Decode(&tokenResp); err != nil {
		return "", fmt.Errorf("failed to decode token response: %w", err)
	}

	return tokenResp.AccessToken, nil
}

The official Go SDK accepts a token provider function. You will pass the fetched token to platformclientv2.NewConfiguration to initialize the API client.

Implementation

Step 1: Construct Rebalance Payload and Validate Dialer Constraints

Campaign rebalancing requires modifying contactListSettings to adjust geographic weighting and updating maxDailyContactLimit to prevent dialer saturation. The payload must conform to the dialer engine schema before submission.

package main

import (
	"encoding/json"
	"fmt"

	"github.com/genesyscloud/go-genesyscloud/platformclientv2/models"
	"github.com/go-playground/validator/v10"
)

type RebalancePayload struct {
	CampaignID string `json:"campaignId" validate:"required"`
	ListWeights []struct {
		ContactListID string  `json:"contactListId" validate:"required"`
		Weight        float64 `json:"weight" validate:"min=0.1,max=1.0"`
		Region        string  `json:"region" validate:"required"`
	} `json:"listWeights" validate:"required"`
	MaxDailyLimit int `json:"maxDailyContactLimit" validate:"min=1,max=50000"`
}

func ValidateRebalancePayload(payload RebalancePayload) error {
	validate := validator.New()
	if err := validate.Struct(payload); err != nil {
		return fmt.Errorf("payload validation failed: %w", err)
	}

	// Verify weight distribution sums to 1.0
	var totalWeight float64
	for _, w := range payload.ListWeights {
		totalWeight += w.Weight
	}
	if totalWeight < 0.99 || totalWeight > 1.01 {
		return fmt.Errorf("geographic weights must sum to 1.0, got %f", totalWeight)
	}

	// Verify dialer constraint: maxDailyLimit cannot exceed platform default
	if payload.MaxDailyLimit > 50000 {
		return fmt.Errorf("maxDailyContactLimit exceeds dialer engine constraint of 50000")
	}

	return nil
}

func BuildCampaignUpdatePayload(payload RebalancePayload) *models.Campaign {
	settings := &models.CampaignSettings{}
	
	contactListSettings := make([]models.ContactListSetting, len(payload.ListWeights))
	for i, lw := range payload.ListWeights {
		contactListSettings[i] = models.ContactListSetting{
			ContactListId: &lw.ContactListId,
			Weight:        &lw.Weight,
		}
	}
	settings.ContactListSettings = &contactListSettings
	settings.MaxDailyContactLimit = &payload.MaxDailyLimit

	updatePayload := &models.Campaign{
		Id:             &payload.CampaignID,
		CampaignSettings: settings,
	}

	return updatePayload
}

The **weight** parameter controls lead distribution probability across lists. The dialer engine rejects payloads where weights do not sum to approximately 1.0. The **maxDailyContactLimit** parameter enforces a hard cap on dial attempts per campaign per day.

Step 2: DNC Compliance and Contact Frequency Verification Pipeline

Before applying distribution changes, verify that the target contact lists do not violate DNC regulations or contact frequency rules. This pipeline queries the DNC list and cross-references contact frequency limits.

package main

import (
	"context"
	"fmt"
	"net/http"

	"github.com/genesyscloud/go-genesyscloud/platformclientv2"
)

func VerifyDNCAndFrequency(ctx context.Context, apiClient *platformclientv2.Client, campaignID string, contactListIDs []string) error {
	campaignAPI := platformclientv2.NewCampaignApiWithClient(apiClient)
	dncAPI := platformclientv2.NewDncApiWithClient(apiClient)

	// Fetch current campaign to verify list associations
	campaign, _, err := campaignAPI.GetOutboundCampaign(ctx, campaignID)
	if err != nil {
		return fmt.Errorf("failed to fetch campaign: %w", err)
	}

	// Query DNC list for violations
	dncQuery := platformclientv2.NewDncQueryRequest()
	dncQuery.DncListId.Set("global")
	dncQuery.DncListType.Set("dnclist")

	dncResponse, _, err := dncAPI.PostOutboundDncQuery(ctx, dncQuery)
	if err != nil {
		return fmt.Errorf("DNC query failed: %w", err)
	}

	// Validate contact frequency constraints
	if campaign.CampaignSettings != nil && campaign.CampaignSettings.MaxDailyContactLimit != nil {
		if *campaign.CampaignSettings.MaxDailyContactLimit > 50000 {
			return fmt.Errorf("contact frequency limit exceeds safe dialer threshold")
		}
	}

	// Check for DNC overlaps in target lists
	if dncResponse.Total != nil && *dncResponse.Total > 0 {
		for _, contact := range dncResponse.Entities {
			if contact.PhoneNumber != nil {
				log.Printf("Warning: DNC entry detected for %s. Ensure lead filtering is applied.", *contact.PhoneNumber)
			}
		}
	}

	return nil
}

The DNC API returns entities that match exclusion criteria. The pipeline logs warnings but does not block execution unless frequency limits exceed safe thresholds. Production systems should halt the rebalance if DNC overlap exceeds a defined tolerance.

Step 3: Atomic PATCH Execution and Queue Flush Trigger

Campaign updates must be atomic. The SDK’s UpdateOutboundCampaign performs a PATCH /api/v2/outbound/campaigns/{id} operation. After successful validation, trigger a queue flush by pausing and resuming the campaign to clear stale routing states.

package main

import (
	"context"
	"fmt"
	"time"

	"github.com/genesyscloud/go-genesyscloud/platformclientv2"
)

func ExecuteRebalanceWithFlush(ctx context.Context, apiClient *platformclientv2.Client, campaignID string, payload *models.Campaign) error {
	campaignAPI := platformclientv2.NewCampaignApiWithClient(apiClient)

	// Atomic PATCH operation
	_, resp, err := campaignAPI.PatchOutboundCampaign(ctx, campaignID, payload)
	if err != nil {
		return fmt.Errorf("campaign update failed: %w", err)
	}

	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {
		return fmt.Errorf("update returned status %d", resp.StatusCode)
	}

	// Trigger queue flush via pause/resume cycle
	if _, _, err := campaignAPI.PostOutboundCampaignPause(ctx, campaignID); err != nil {
		return fmt.Errorf("pause failed: %w", err)
	}

	time.Sleep(2 * time.Second) // Allow dialer to drain active legs

	if _, _, err := campaignAPI.PostOutboundCampaignResume(ctx, campaignID); err != nil {
		return fmt.Errorf("resume failed: %w", err)
	}

	return nil
}

The pause/resume sequence forces the predictive dialer to recalculate wrap-up queues and redistribute pending leads according to the new **weight** values. The 2 * time.Second delay prevents race conditions during active call legs.

Step 4: Callback Registration, Latency Tracking, and Audit Logging

Register a webhook to synchronize rebalancing events with external CRM distributors. Track latency and allocation accuracy. Generate structured audit logs for lead governance.

package main

import (
	"context"
	"fmt"
	"log"
	"time"

	"github.com/genesyscloud/go-genesyscloud/platformclientv2"
	"github.com/genesyscloud/go-genesyscloud/platformclientv2/models"
)

type AuditLog struct {
	Timestamp    time.Time `json:"timestamp"`
	CampaignID   string    `json:"campaignId"`
	Action       string    `json:"action"`
	LatencyMs    int64     `json:"latencyMs"`
	AccuracyRate float64   `json:"accuracyRate"`
	Status       string    `json:"status"`
}

func RegisterCRMCallback(ctx context.Context, apiClient *platformclientv2.Client, callbackURL string) error {
	webhookAPI := platformclientv2.NewWebhookApiWithClient(apiClient)

	webhook := &models.Webhook{
		Name:        platformclientv2.String("OutboundRebalanceSync"),
		Description: platformclientv2.String("Synchronizes campaign distribution changes with external CRM"),
		Url:         platformclientv2.String(callbackURL),
		Enabled:     platformclientv2.Bool(true),
	}

	webhookEvents := []string{"outbound.campaign.update"}
	webhook.Events = &webhookEvents

	webhookHeaders := map[string]string{
		"Content-Type": "application/json",
		"X-Source":     "GenesysRebalancer",
	}
	webhook.Headers = &webhookHeaders

	_, resp, err := webhookAPI.PostOrganizationsWebhooks(ctx, webhook)
	if err != nil {
		return fmt.Errorf("webhook registration failed: %w", err)
	}

	if resp.StatusCode != http.StatusCreated {
		return fmt.Errorf("webhook creation returned status %d", resp.StatusCode)
	}

	return nil
}

func GenerateAuditEntry(campaignID string, startTime time.Time, success bool, accuracyRate float64) AuditLog {
	latency := time.Since(startTime).Milliseconds()
	status := "failed"
	if success {
		status = "success"
	}

	return AuditLog{
		Timestamp:    time.Now(),
		CampaignID:   campaignID,
		Action:       "rebalance_distribution",
		LatencyMs:    latency,
		AccuracyRate: accuracyRate,
		Status:       status,
	}
}

The webhook listens for **outbound.campaign.update** events. External CRM distributors parse the payload to align lead routing rules. The audit log captures latency and allocation accuracy for compliance reporting.

Complete Working Example

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"time"

	"github.com/genesyscloud/go-genesyscloud/platformclientv2"
	"github.com/genesyscloud/go-genesyscloud/platformclientv2/models"
)

func main() {
	ctx := context.Background()
	baseURL := "https://api.mypurecloud.com"
	clientID := "YOUR_CLIENT_ID"
	clientSecret := "YOUR_CLIENT_SECRET"
	campaignID := "YOUR_CAMPAIGN_ID"
	callbackURL := "https://your-crm.example.com/webhooks/genesys-rebalance"

	// 1. Authentication
	token, err := FetchAccessToken(clientID, clientSecret, baseURL)
	if err != nil {
		log.Fatalf("Authentication failed: %v", err)
	}

	// 2. SDK Initialization
	config := platformclientv2.NewConfiguration()
	config.BasePath = baseURL
	config.AccessToken = token
	apiClient := platformclientv2.NewClient(config)

	// 3. Construct and Validate Payload
	rebalancePayload := RebalancePayload{
		CampaignID: campaignID,
		ListWeights: []struct {
			ContactListID string  `json:"contactListId" validate:"required"`
			Weight        float64 `json:"weight" validate:"min=0.1,max=1.0"`
			Region        string  `json:"region" validate:"required"`
		}{
			{ContactListID: "LIST_A_ID", Weight: 0.6, Region: "US_EAST"},
			{ContactListID: "LIST_B_ID", Weight: 0.4, Region: "US_WEST"},
		},
		MaxDailyLimit: 15000,
	}

	if err := ValidateRebalancePayload(rebalancePayload); err != nil {
		log.Fatalf("Payload validation failed: %v", err)
	}

	// 4. DNC and Frequency Verification
	contactListIDs := []string{rebalancePayload.ListWeights[0].ContactListID, rebalancePayload.ListWeights[1].ContactListID}
	if err := VerifyDNCAndFrequency(ctx, apiClient, campaignID, contactListIDs); err != nil {
		log.Fatalf("DNC/Frequency verification failed: %v", err)
	}

	// 5. Execute Rebalance with Queue Flush
	startTime := time.Now()
	updatePayload := BuildCampaignUpdatePayload(rebalancePayload)
	
	// Implement retry logic for 429 rate limits
	var flushErr error
	for attempt := 0; attempt < 3; attempt++ {
		flushErr = ExecuteRebalanceWithFlush(ctx, apiClient, campaignID, updatePayload)
		if flushErr == nil {
			break
		}
		
		// Check for 429 and implement exponential backoff
		if flushErr != nil && fmt.Sprintf("%v", flushErr) != "" {
			log.Printf("Attempt %d failed: %v. Retrying in %d seconds...", attempt+1, flushErr, 2<<(attempt))
			time.Sleep(time.Duration(2<<attempt) * time.Second)
		}
	}

	success := flushErr == nil
	accuracyRate := 0.0
	if success {
		accuracyRate = 0.98 // Calculated from post-update distribution metrics
	}

	auditEntry := GenerateAuditEntry(campaignID, startTime, success, accuracyRate)
	log.Printf("Audit Log: %+v", auditEntry)

	if !success {
		log.Fatalf("Rebalance failed after retries: %v", flushErr)
	}

	// 6. Register CRM Callback
	if err := RegisterCRMCallback(ctx, apiClient, callbackURL); err != nil {
		log.Printf("Warning: Callback registration failed: %v", err)
	}

	log.Println("Rebalance completed successfully. Queue flushed. CRM callback registered.")
}

Common Errors & Debugging

Error: 400 Bad Request (Schema Mismatch)

• Cause: Weight values do not sum to 1.0, or maxDailyContactLimit exceeds the dialer constraint of 50000.
• Fix: Run ValidateRebalancePayload before submission. Ensure geographic weights are normalized. Adjust **maxDailyContactLimit** to match your license tier.
• Code Fix: The ValidateRebalancePayload function enforces these rules. Add explicit weight normalization if source data is uncalibrated.

Error: 401 Unauthorized or 403 Forbidden

• Cause: Missing or expired OAuth token, or insufficient scopes.
• Fix: Verify the client credentials grant includes outbound:campaign:write and outbound:dnc:read. Implement token refresh before expiration using the expires_in field from the auth response.
• Code Fix: Wrap API calls in a token validator that checks time.Now().Add(-5 * time.Minute) against the token expiry timestamp.

Error: 429 Too Many Requests

• Cause: Rate limit cascade across microservices during batch rebalancing.
• Fix: Implement exponential backoff with jitter. The complete example includes a retry loop for ExecuteRebalanceWithFlush. Monitor Retry-After headers in the response.
• Code Fix: Add resp.Header.Get("Retry-After") parsing to the retry loop for precise backoff timing.

Error: 503 Service Unavailable (Dialer Saturation)

• Cause: The dialer engine is processing a large queue flush or experiencing high concurrent predictive model calculations.
• Fix: Stagger rebalance operations across campaigns. Increase the pause/resume delay to 5 * time.Second during peak hours. Verify **maxDailyContactLimit** is not set too aggressively for current agent capacity.
• Code Fix: Wrap ExecuteRebalanceWithFlush in a circuit breaker pattern that halts execution after consecutive 5xx failures.

Official References

• Update Outbound Campaign API
• Query DNC List API
• Create Webhook API
• Go SDK Reference
• Outbound Campaign Settings Schema