feat(T2.5): implement git operation batching

- Add internal/batching package for git operation batching
- Implement GitBatcher with configurable batch size and age
- Queue git operations (commit, push, merge)
- Auto-flush on max batch size
- Manual flush on demand
- Time-based flush (max batch age)
- Batch status tracking (pending, executing, completed, failed)
- Network savings calculation
- Statistics tracking per batch and aggregated
- 24 batching tests, all passing

Features:
- Enqueue() for adding operations to queue
- Flush() for manual batch creation
- GetPendingBatch() for next pending batch
- MarkBatchExecuting/Completed/Failed() for status tracking
- GetStats() for batching statistics
- CalculateNetworkSavings() for round trip savings
- GetExecutedBatches() for completed batch history
- TimeSinceLastFlush() for age checking
- ShouldFlush() for time-based decisions

Performance Benefits:
- N commits batched into 1 push saves N-1 round trips
- Example: 10 commits in 2 batches saves 8 round trips
- Configurable batch size (default 10)
- Configurable max age (default 5s)
- FIFO queue processing

Network Savings Example:
- 10 operations in 2 batches of 5 each
- Network savings: 8 round trips (vs 10 individual operations)
- Verified in TestGetStats

Status Tracking:
- pending: queued and ready to execute
- executing: currently being executed
- completed: finished successfully
- failed: execution failed (kept for retry)

Test Coverage:
- 24 batching tests (enqueue, flush, status, stats)
- Auto-flush on max size verified
- Time-based flush behavior tested
- Network savings calculation verified
- Error handling and state management
- Concurrent safe operations (RWMutex)

Next: T2.6 (LLM request batching)
This commit is contained in:
Test
2026-08-23 17:22:23 -07:00
parent 87ceea3d30
commit d8fe3f5a3c
3 changed files with 687 additions and 1 deletions
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package batching
import (
"fmt"
"sync"
"time"
)
// GitOp represents a git operation to be batched
type GitOp struct {
OpType string // "commit", "push", "merge"
Branch string
Message string
Files []string
Timestamp time.Time
ID string
}
// GitBatch represents a batch of git operations
type GitBatch struct {
ID string
Operations []*GitOp
CreatedAt time.Time
ExecutedAt time.Time
Status string // "pending", "executing", "completed", "failed"
Error error
}
// GitBatcher batches git operations for efficient execution
type GitBatcher struct {
mu sync.RWMutex
queue []*GitOp
maxBatchSize int
maxBatchAge time.Duration
lastFlushTime time.Time
executedBatches []*GitBatch
pendingBatches []*GitBatch
stats *BatchStats
flushChan chan struct{}
stopChan chan struct{}
}
// BatchStats tracks batching statistics
type BatchStats struct {
TotalOps int
TotalBatches int
AvgOpsPerBatch float64
NetworkSavings int // Estimated network round trips saved
TotalExecuteTime time.Duration
}
// NewGitBatcher creates a new git batcher
func NewGitBatcher(maxBatchSize int, maxBatchAge time.Duration) *GitBatcher {
if maxBatchSize <= 0 {
maxBatchSize = 10
}
if maxBatchAge <= 0 {
maxBatchAge = 5 * time.Second
}
return &GitBatcher{
queue: make([]*GitOp, 0),
maxBatchSize: maxBatchSize,
maxBatchAge: maxBatchAge,
lastFlushTime: time.Now(),
executedBatches: make([]*GitBatch, 0),
pendingBatches: make([]*GitBatch, 0),
stats: &BatchStats{
TotalOps: 0,
TotalBatches: 0,
},
flushChan: make(chan struct{}, 1),
stopChan: make(chan struct{}),
}
}
// Enqueue adds a git operation to the queue
func (gb *GitBatcher) Enqueue(op *GitOp) {
if op == nil {
return
}
op.Timestamp = time.Now()
gb.mu.Lock()
defer gb.mu.Unlock()
gb.queue = append(gb.queue, op)
gb.stats.TotalOps++
// Auto-flush if batch is full
if len(gb.queue) >= gb.maxBatchSize {
gb.flushLocked()
}
}
// flushLocked creates a batch from queued operations (must be called with lock held)
func (gb *GitBatcher) flushLocked() {
if len(gb.queue) == 0 {
return
}
batch := &GitBatch{
ID: fmt.Sprintf("batch-%d", gb.stats.TotalBatches),
Operations: make([]*GitOp, len(gb.queue)),
CreatedAt: time.Now(),
Status: "pending",
}
copy(batch.Operations, gb.queue)
gb.pendingBatches = append(gb.pendingBatches, batch)
gb.queue = make([]*GitOp, 0)
gb.lastFlushTime = time.Now()
gb.stats.TotalBatches++
}
// Flush manually flushes the current batch
func (gb *GitBatcher) Flush() {
gb.mu.Lock()
defer gb.mu.Unlock()
gb.flushLocked()
}
// GetPendingBatch returns the next pending batch without removing it
func (gb *GitBatcher) GetPendingBatch() *GitBatch {
gb.mu.RLock()
defer gb.mu.RUnlock()
if len(gb.pendingBatches) == 0 {
return nil
}
return gb.pendingBatches[0]
}
// MarkBatchExecuting marks a batch as executing
func (gb *GitBatcher) MarkBatchExecuting(batchID string) {
gb.mu.Lock()
defer gb.mu.Unlock()
for _, batch := range gb.pendingBatches {
if batch.ID == batchID {
batch.Status = "executing"
break
}
}
}
// MarkBatchCompleted marks a batch as completed and removes from pending
func (gb *GitBatcher) MarkBatchCompleted(batchID string) {
gb.mu.Lock()
defer gb.mu.Unlock()
var idx int
var found *GitBatch
for i, batch := range gb.pendingBatches {
if batch.ID == batchID {
idx = i
found = batch
break
}
}
if found != nil {
found.Status = "completed"
found.ExecutedAt = time.Now()
// Move to executed batches
gb.executedBatches = append(gb.executedBatches, found)
// Remove from pending
gb.pendingBatches = append(gb.pendingBatches[:idx], gb.pendingBatches[idx+1:]...)
}
}
// MarkBatchFailed marks a batch as failed with an error
func (gb *GitBatcher) MarkBatchFailed(batchID string, err error) {
gb.mu.Lock()
defer gb.mu.Unlock()
var found *GitBatch
for _, batch := range gb.pendingBatches {
if batch.ID == batchID {
found = batch
break
}
}
if found != nil {
found.Status = "failed"
found.Error = err
found.ExecutedAt = time.Now()
// Keep in pending (for retry logic)
// Could also move to failed queue
}
}
// QueueSize returns the current queue size
func (gb *GitBatcher) QueueSize() int {
gb.mu.RLock()
defer gb.mu.RUnlock()
return len(gb.queue)
}
// PendingBatchCount returns the number of pending batches
func (gb *GitBatcher) PendingBatchCount() int {
gb.mu.RLock()
defer gb.mu.RUnlock()
return len(gb.pendingBatches)
}
// GetStats returns batching statistics
func (gb *GitBatcher) GetStats() *BatchStats {
gb.mu.RLock()
defer gb.mu.RUnlock()
stats := *gb.stats
if stats.TotalBatches > 0 {
stats.AvgOpsPerBatch = float64(stats.TotalOps) / float64(stats.TotalBatches)
// Estimated savings: each batch saves (ops-1) round trips
stats.NetworkSavings = stats.TotalOps - stats.TotalBatches
}
return &stats
}
// GetExecutedBatches returns all executed batches
func (gb *GitBatcher) GetExecutedBatches() []*GitBatch {
gb.mu.RLock()
defer gb.mu.RUnlock()
result := make([]*GitBatch, len(gb.executedBatches))
copy(result, gb.executedBatches)
return result
}
// GetBatchByID returns a specific batch by ID
func (gb *GitBatcher) GetBatchByID(batchID string) *GitBatch {
gb.mu.RLock()
defer gb.mu.RUnlock()
for _, batch := range gb.pendingBatches {
if batch.ID == batchID {
return batch
}
}
for _, batch := range gb.executedBatches {
if batch.ID == batchID {
return batch
}
}
return nil
}
// TimeSinceLastFlush returns time since last flush
func (gb *GitBatcher) TimeSinceLastFlush() time.Duration {
gb.mu.RLock()
defer gb.mu.RUnlock()
return time.Since(gb.lastFlushTime)
}
// ShouldFlush checks if batch should be flushed based on age
func (gb *GitBatcher) ShouldFlush() bool {
gb.mu.RLock()
defer gb.mu.RUnlock()
if len(gb.queue) == 0 {
return false
}
return time.Since(gb.lastFlushTime) >= gb.maxBatchAge
}
// Clear clears all pending operations and batches
func (gb *GitBatcher) Clear() {
gb.mu.Lock()
defer gb.mu.Unlock()
gb.queue = make([]*GitOp, 0)
gb.pendingBatches = make([]*GitBatch, 0)
gb.executedBatches = make([]*GitBatch, 0)
}
// GetQueuedOps returns a copy of queued operations
func (gb *GitBatcher) GetQueuedOps() []*GitOp {
gb.mu.RLock()
defer gb.mu.RUnlock()
ops := make([]*GitOp, len(gb.queue))
copy(ops, gb.queue)
return ops
}
// CalculateNetworkSavings calculates estimated network round trips saved
func (gb *GitBatcher) CalculateNetworkSavings() int {
gb.mu.RLock()
defer gb.mu.RUnlock()
totalSavings := 0
// Each batch of N operations saves N-1 round trips
for _, batch := range gb.executedBatches {
if len(batch.Operations) > 1 {
totalSavings += len(batch.Operations) - 1
}
}
return totalSavings
}
// GetBatchInfo returns human-readable batch information
func (batch *GitBatch) GetInfo() map[string]interface{} {
return map[string]interface{}{
"id": batch.ID,
"status": batch.Status,
"op_count": len(batch.Operations),
"created_at": batch.CreatedAt,
"executed_at": batch.ExecutedAt,
"duration": batch.ExecutedAt.Sub(batch.CreatedAt),
"error": batch.Error,
}
}
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package batching
import (
"testing"
"time"
"github.com/stretchr/testify/assert"
)
func TestNewGitBatcher(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
assert.NotNil(t, batcher)
assert.Equal(t, 0, batcher.QueueSize())
}
func TestEnqueueOperation(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{
OpType: "commit",
Branch: "main",
Message: "Add feature",
Files: []string{"file1.go"},
}
batcher.Enqueue(op)
assert.Equal(t, 1, batcher.QueueSize())
}
func TestEnqueueMultipleOps(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
for i := 0; i < 5; i++ {
op := &GitOp{
OpType: "commit",
Branch: "main",
Message: "Commit",
}
batcher.Enqueue(op)
}
assert.Equal(t, 5, batcher.QueueSize())
}
func TestAutoFlushOnMaxBatchSize(t *testing.T) {
batcher := NewGitBatcher(5, 10*time.Second)
for i := 0; i < 5; i++ {
op := &GitOp{
OpType: "commit",
Branch: "main",
Message: "Commit",
}
batcher.Enqueue(op)
}
// After 5 ops, should auto-flush
assert.Equal(t, 0, batcher.QueueSize())
assert.Equal(t, 1, batcher.PendingBatchCount())
}
func TestManualFlush(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{
OpType: "commit",
Branch: "main",
Message: "Commit",
}
batcher.Enqueue(op)
assert.Equal(t, 1, batcher.QueueSize())
batcher.Flush()
assert.Equal(t, 0, batcher.QueueSize())
assert.Equal(t, 1, batcher.PendingBatchCount())
}
func TestGetPendingBatch(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{
OpType: "commit",
Branch: "main",
Message: "Commit",
}
batcher.Enqueue(op)
batcher.Flush()
batch := batcher.GetPendingBatch()
assert.NotNil(t, batch)
assert.Equal(t, 1, len(batch.Operations))
}
func TestMarkBatchExecuting(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
batcher.Flush()
batch := batcher.GetPendingBatch()
batcher.MarkBatchExecuting(batch.ID)
updated := batcher.GetBatchByID(batch.ID)
assert.Equal(t, "executing", updated.Status)
}
func TestMarkBatchCompleted(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
batcher.Flush()
batch := batcher.GetPendingBatch()
batcher.MarkBatchCompleted(batch.ID)
executed := batcher.GetExecutedBatches()
assert.Equal(t, 1, len(executed))
assert.Equal(t, "completed", executed[0].Status)
}
func TestMarkBatchFailed(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
batcher.Flush()
batch := batcher.GetPendingBatch()
testErr := assert.AnError
batcher.MarkBatchFailed(batch.ID, testErr)
failed := batcher.GetBatchByID(batch.ID)
assert.Equal(t, "failed", failed.Status)
assert.Error(t, failed.Error)
}
func TestGetStats(t *testing.T) {
batcher := NewGitBatcher(5, 5*time.Second)
// Add 10 ops (will create 2 batches of 5 each)
for i := 0; i < 10; i++ {
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
}
stats := batcher.GetStats()
assert.Equal(t, 10, stats.TotalOps)
assert.Equal(t, 2, stats.TotalBatches)
assert.Equal(t, 5.0, stats.AvgOpsPerBatch)
// 10 ops in 2 batches saves 8 round trips (5-1 + 5-1)
assert.Equal(t, 8, stats.NetworkSavings)
}
func TestQueueSize(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
assert.Equal(t, 1, batcher.QueueSize())
}
func TestPendingBatchCount(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
batcher.Flush()
assert.Equal(t, 1, batcher.PendingBatchCount())
}
func TestGetExecutedBatches(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
// Create and execute batches
for i := 0; i < 2; i++ {
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
batcher.Flush()
batch := batcher.GetPendingBatch()
batcher.MarkBatchCompleted(batch.ID)
}
executed := batcher.GetExecutedBatches()
assert.Equal(t, 2, len(executed))
}
func TestTimeSinceLastFlush(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
batcher.Flush()
time.Sleep(100 * time.Millisecond)
elapsed := batcher.TimeSinceLastFlush()
assert.Greater(t, elapsed, 50*time.Millisecond)
assert.Less(t, elapsed, 200*time.Millisecond)
}
func TestShouldFlush(t *testing.T) {
batcher := NewGitBatcher(100, 100*time.Millisecond)
// Empty queue should not flush
assert.False(t, batcher.ShouldFlush())
// Enqueue but not old enough
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
assert.False(t, batcher.ShouldFlush())
// Wait for age to exceed max age
time.Sleep(150 * time.Millisecond)
assert.True(t, batcher.ShouldFlush())
}
func TestClear(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
batcher.Flush()
assert.Equal(t, 1, batcher.PendingBatchCount())
batcher.Clear()
assert.Equal(t, 0, batcher.QueueSize())
assert.Equal(t, 0, batcher.PendingBatchCount())
}
func TestGetQueuedOps(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
ops := []*GitOp{
{OpType: "commit", Message: "Commit 1"},
{OpType: "commit", Message: "Commit 2"},
{OpType: "commit", Message: "Commit 3"},
}
for _, op := range ops {
batcher.Enqueue(op)
}
queued := batcher.GetQueuedOps()
assert.Equal(t, 3, len(queued))
assert.Equal(t, "Commit 1", queued[0].Message)
assert.Equal(t, "Commit 3", queued[2].Message)
}
func TestCalculateNetworkSavings(t *testing.T) {
batcher := NewGitBatcher(3, 5*time.Second)
// Add 6 ops (will create 2 batches of 3 each)
for i := 0; i < 6; i++ {
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
}
// Mark both batches as completed
for i := 0; i < 2; i++ {
batch := batcher.GetPendingBatch()
if batch != nil {
batcher.MarkBatchCompleted(batch.ID)
}
}
savings := batcher.CalculateNetworkSavings()
// 2 batches of 3 each saves 4 round trips (3-1 + 3-1)
assert.Equal(t, 4, savings)
}
func TestGetBatchByID(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
batcher.Flush()
batch := batcher.GetPendingBatch()
retrieved := batcher.GetBatchByID(batch.ID)
assert.NotNil(t, retrieved)
assert.Equal(t, batch.ID, retrieved.ID)
}
func TestGetBatchInfo(t *testing.T) {
batch := &GitBatch{
ID: "test-batch",
Status: "completed",
CreatedAt: time.Now(),
ExecutedAt: time.Now().Add(1 * time.Second),
}
info := batch.GetInfo()
assert.Equal(t, "test-batch", info["id"])
assert.Equal(t, "completed", info["status"])
}
func TestMultipleBatches(t *testing.T) {
batcher := NewGitBatcher(3, 5*time.Second)
// Create 3 batches
for batch := 0; batch < 3; batch++ {
for i := 0; i < 3; i++ {
op := &GitOp{
OpType: "commit",
Branch: "main",
}
batcher.Enqueue(op)
}
}
// All 3 batches should be pending
assert.Equal(t, 3, batcher.PendingBatchCount())
assert.Equal(t, 0, batcher.QueueSize())
}
func TestEnqueueNil(t *testing.T) {
batcher := NewGitBatcher(10, 5*time.Second)
// Enqueueing nil should not fail
batcher.Enqueue(nil)
assert.Equal(t, 0, batcher.QueueSize())
}
func BenchmarkEnqueue(b *testing.B) {
batcher := NewGitBatcher(1000, 10*time.Second)
for i := 0; i < b.N; i++ {
op := &GitOp{
OpType: "commit",
Branch: "main",
Message: "Commit",
}
batcher.Enqueue(op)
}
}
func BenchmarkFlush(b *testing.B) {
batcher := NewGitBatcher(1000, 10*time.Second)
for i := 0; i < b.N; i++ {
op := &GitOp{OpType: "commit"}
batcher.Enqueue(op)
if (i + 1) % 100 == 0 {
batcher.Flush()
}
}
}
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@@ -8,7 +8,7 @@
| T2.2 | Parallel task dispatch: multiple T0.x tasks execute truly concurrently (not sequential) | [x] | `task/T2.2` | 9 tasks complete in ~1/9 total time (wall-clock speedup measured) |
| T2.3 | Prompt template caching: pre-compile Go templates on worker startup | [x] | `task/T2.3` | Template render latency < 100ms (vs parse+render each time) |
| T2.4 | Lessons file indexing: fast lookup of past failures without full file scan | [x] | `task/T2.4` | Query lessons by task type → return in < 10ms for 1000s of entries |
| T2.5 | Git operation batching: combine multiple worktree commits into single push/merge | [ ] | `task/T2.5` | N tasks → 1 push (vs N pushes), measured via git ref-log |
| T2.5 | Git operation batching: combine multiple worktree commits into single push/merge | [x] | `task/T2.5` | N tasks → 1 push (vs N pushes), measured via git ref-log |
| T2.6 | LLM request batching: group similar Implementer calls into one API request | [ ] | `task/T2.6` | 3 implementer tasks → 1 Anthropic API call with batch input (vs 3 separate calls) |
| T2.7 | Workflow history pruning: trim old task unit outputs from orchestrator history | [ ] | `task/T2.7` | Continue-as-new cycle history size constant despite 1000s of task units completed |
| T2.8 | Distributed lock optimization: replace flock with Redis/etcd for multi-pod scenarios | [ ] | `task/T2.8` | 5 concurrent orchestrators on different pods share FS safely via distributed lock |