v0.0.523 ringbuffer

README.md

@@ -20,6 +20,7 @@ Potentially needs `export GOPRIVATE="gogs.mikescher.com"`
 | zipext      | Mike       | Utility for zip/gzip/tar etc                                                                                  |
 | reflectext  | Mike       | Utility for golang reflection                                                                                 |
 | fsext       | Mike       | Utility for filesytem access                                                                                  |
+| ctxext      | Mike       | Utility for context.Context                                                                                   |
 |             |            |                                                                                                               |
 | mongoext    | Mike       | Utility/Helper functions for mongodb (kinda abandoned)                                                        |
 | cursortoken | Mike       | MongoDB cursortoken implementation                                                                            |

ctxext/getter.go

@@ -0,0 +1,27 @@
+package ctxext
+
+import "context"
+
+func Value[T any](ctx context.Context, key any) (T, bool) {
+	v := ctx.Value(key)
+	if v == nil {
+		return *new(T), false
+	}
+	if tv, ok := v.(T); !ok {
+		return *new(T), false
+	} else {
+		return tv, true
+	}
+}
+
+func ValueOrDefault[T any](ctx context.Context, key any, def T) T {
+	v := ctx.Value(key)
+	if v == nil {
+		return def
+	}
+	if tv, ok := v.(T); !ok {
+		return def
+	} else {
+		return tv
+	}
+}

dataext/ringBuffer.go

@@ -0,0 +1,92 @@
+package dataext
+
+import "iter"
+
+type RingBuffer[T any] struct {
+	items    []T //
+	capacity int // max number of items the buffer can hold
+	size     int // how many items are in the buffer
+	head     int // ptr to next item
+}
+
+func NewRingBuffer[T any](capacity int) *RingBuffer[T] {
+	return &RingBuffer[T]{
+		items:    make([]T, capacity),
+		capacity: capacity,
+		size:     0,
+		head:     0,
+	}
+}
+
+func (rb *RingBuffer[T]) Push(item T) {
+	if rb.size < rb.capacity {
+		rb.size++
+	}
+	rb.items[rb.head] = item
+	rb.head = (rb.head + 1) % rb.capacity
+}
+
+func (rb *RingBuffer[T]) Peek() (T, bool) {
+	if rb.size == 0 {
+		return *new(T), false
+	}
+	return rb.items[(rb.head-1+rb.capacity)%rb.capacity], true
+}
+
+func (rb *RingBuffer[T]) Items() []T {
+	if rb.size < rb.capacity {
+		return rb.items[:rb.size]
+	}
+	return append(rb.items[rb.head:], rb.items[:rb.head]...)
+}
+
+func (rb *RingBuffer[T]) Size() int {
+	return rb.size
+}
+
+func (rb *RingBuffer[T]) Capacity() int {
+	return rb.capacity
+}
+
+func (rb *RingBuffer[T]) Clear() {
+	rb.size = 0
+	rb.head = 0
+}
+
+func (rb *RingBuffer[T]) IsFull() bool {
+	return rb.size == rb.capacity
+}
+
+func (rb *RingBuffer[T]) At(i int) T {
+	if i < 0 || i >= rb.size {
+		panic("Index out of bounds")
+	}
+	return rb.items[(rb.head+i)%rb.capacity]
+}
+
+func (rb *RingBuffer[T]) Get(i int) (T, bool) {
+	if i < 0 || i >= rb.size {
+		return *new(T), false
+	}
+	return rb.items[(rb.head+i)%rb.capacity], true
+}
+
+func (rb *RingBuffer[T]) Iter() iter.Seq[T] {
+	return func(yield func(T) bool) {
+		for i := 0; i < rb.size; i++ {
+			if !yield(rb.At(i)) {
+				return
+			}
+		}
+	}
+}
+
+func (rb *RingBuffer[T]) Iter2() iter.Seq2[int, T] {
+	return func(yield func(int, T) bool) {
+		for i := 0; i < rb.size; i++ {
+			if !yield(i, rb.At(i)) {
+				return
+			}
+		}
+	}
+}

goextVersion.go

@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.520"
+const GoextVersion = "0.0.523"
 
-const GoextVersionTimestamp = "2024-10-05T01:02:25+0200"
+const GoextVersionTimestamp = "2024-10-05T01:28:46+0200"

sq/database.go

@@ -75,7 +75,7 @@ func (db *database) Exec(ctx context.Context, sqlstr string, prep PP) (sql.Resul
 
 	postMeta := PostExecMeta{Context: ctx, TransactionConstructorContext: nil, Init: t0, Start: t1, End: time.Now()}
 	for _, v := range db.lstr {
-		v.PostExec(nil, origsql, sqlstr, prep, postMeta)
+		v.PostExec(nil, origsql, sqlstr, prep, err, postMeta)
 	}
 
 	if err != nil {
@@ -104,7 +104,7 @@ func (db *database) Query(ctx context.Context, sqlstr string, prep PP) (*sqlx.Ro
 
 	postMeta := PostQueryMeta{Context: ctx, TransactionConstructorContext: nil, Init: t0, Start: t1, End: time.Now()}
 	for _, v := range db.lstr {
-		v.PostQuery(nil, origsql, sqlstr, prep, postMeta)
+		v.PostQuery(nil, origsql, sqlstr, prep, err, postMeta)
 	}
 
 	if err != nil {

sq/listener.go

@@ -92,8 +92,8 @@ type Listener interface {
 	PostTxBegin(txid uint16, result error, meta PostTxBeginMeta)
 	PostTxCommit(txid uint16, result error, meta PostTxCommitMeta)
 	PostTxRollback(txid uint16, result error, meta PostTxRollbackMeta)
-	PostQuery(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostQueryMeta)
-	PostExec(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostExecMeta)
+	PostQuery(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostQueryMeta)
+	PostExec(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostExecMeta)
 }
 
 type genListener struct {
@@ -107,8 +107,8 @@ type genListener struct {
 	postTxBegin    func(txid uint16, result error, meta PostTxBeginMeta)
 	postTxCommit   func(txid uint16, result error, meta PostTxCommitMeta)
 	postTxRollback func(txid uint16, result error, meta PostTxRollbackMeta)
-	postQuery      func(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostQueryMeta)
-	postExec       func(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostExecMeta)
+	postQuery      func(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostQueryMeta)
+	postExec       func(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostExecMeta)
 }
 
 func (g genListener) PrePing(ctx context.Context, meta PrePingMeta) error {
@@ -183,15 +183,15 @@ func (g genListener) PostTxRollback(txid uint16, result error, meta PostTxRollba
 	}
 }
 
-func (g genListener) PostQuery(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostQueryMeta) {
+func (g genListener) PostQuery(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostQueryMeta) {
 	if g.postQuery != nil {
-		g.postQuery(txID, sqlOriginal, sqlReal, params, meta)
+		g.postQuery(txID, sqlOriginal, sqlReal, params, result, meta)
 	}
 }
 
-func (g genListener) PostExec(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostExecMeta) {
+func (g genListener) PostExec(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostExecMeta) {
 	if g.postExec != nil {
-		g.postExec(txID, sqlOriginal, sqlReal, params, meta)
+		g.postExec(txID, sqlOriginal, sqlReal, params, result, meta)
 	}
 }
 
@@ -246,21 +246,21 @@ func NewPostTxRollbackListener(f func(txid uint16, result error, meta PostTxRoll
 	return genListener{postTxRollback: f}
 }
 
-func NewPostQueryListener(f func(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostQueryMeta)) Listener {
+func NewPostQueryListener(f func(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostQueryMeta)) Listener {
 	return genListener{postQuery: f}
 }
 
-func NewPostExecListener(f func(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostExecMeta)) Listener {
+func NewPostExecListener(f func(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostExecMeta)) Listener {
 	return genListener{postExec: f}
 }
 
-func NewPostListener(f func(cmdtype string, txID *uint16, sqlOriginal string, sqlReal string, params PP)) Listener {
+func NewPostListener(f func(cmdtype string, txID *uint16, sqlOriginal string, sqlReal string, result error, params PP)) Listener {
 	return genListener{
-		postExec: func(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostExecMeta) {
-			f("EXEC", txID, sqlOriginal, sqlReal, params)
+		postExec: func(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostExecMeta) {
+			f("EXEC", txID, sqlOriginal, sqlReal, result, params)
 		},
-		postQuery: func(txID *uint16, sqlOriginal string, sqlReal string, params PP, meta PostQueryMeta) {
-			f("QUERY", txID, sqlOriginal, sqlReal, params)
+		postQuery: func(txID *uint16, sqlOriginal string, sqlReal string, params PP, result error, meta PostQueryMeta) {
+			f("QUERY", txID, sqlOriginal, sqlReal, result, params)
 		},
 	}
 }

sq/transaction.go

@@ -128,7 +128,7 @@ func (tx *transaction) Exec(ctx context.Context, sqlstr string, prep PP) (sql.Re
 
 	postMeta := PostExecMeta{Context: ctx, TransactionConstructorContext: tx.constructorContext, Init: t0, Start: t1, End: time.Now()}
 	for _, v := range tx.db.lstr {
-		v.PostExec(langext.Ptr(tx.id), origsql, sqlstr, prep, postMeta)
+		v.PostExec(langext.Ptr(tx.id), origsql, sqlstr, prep, err, postMeta)
 	}
 
 	if err != nil {
@@ -161,7 +161,7 @@ func (tx *transaction) Query(ctx context.Context, sqlstr string, prep PP) (*sqlx
 
 	postMeta := PostQueryMeta{Context: ctx, TransactionConstructorContext: tx.constructorContext, Init: t0, Start: t1, End: time.Now()}
 	for _, v := range tx.db.lstr {
-		v.PostQuery(langext.Ptr(tx.id), origsql, sqlstr, prep, postMeta)
+		v.PostQuery(langext.Ptr(tx.id), origsql, sqlstr, prep, err, postMeta)
 	}
 
 	if err != nil {