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Merge pull request #1 from smarty/normalize-context-cancellation
Normalize context cancellation errors
2 parents ac9ba37 + 01b6e4a commit ed127b3

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3 files changed

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3 files changed

+262
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‎config.go

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Original file line numberDiff line numberDiff line change
@@ -26,6 +26,7 @@ func NewBindingPool(handle *sql.DB, options ...option) BindingConnectionPool {
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}
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func newPool(handle *sql.DB, config configuration) ConnectionPool {
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var pool ConnectionPool = NewLibraryConnectionPoolAdapter(handle, config.txOptions)
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pool = NewNormalizeContextCancellationConnectionPool(pool)
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if config.splitStatement {
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pool = NewSplitStatementConnectionPool(pool, config.parameterPrefix)

‎normalize_context_cancellation_connection_pool.go

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package sqldb
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import (
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"context"
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"fmt"
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"strings"
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)
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type NormalizeContextCancellationConnectionPool struct {
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inner ConnectionPool
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}
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func NewNormalizeContextCancellationConnectionPool(inner ConnectionPool) *NormalizeContextCancellationConnectionPool {
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return &NormalizeContextCancellationConnectionPool{inner: inner}
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}
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func (this *NormalizeContextCancellationConnectionPool) Ping(ctx context.Context) error {
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return this.normalizeContextCancellationError(this.inner.Ping(ctx))
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}
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func (this *NormalizeContextCancellationConnectionPool) BeginTransaction(ctx context.Context) (Transaction, error) {
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if tx, err := this.inner.BeginTransaction(ctx); err == nil {
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return NewStackTraceTransaction(tx), nil
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} else {
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return nil, this.normalizeContextCancellationError(err)
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}
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}
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func (this *NormalizeContextCancellationConnectionPool) Close() error {
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return this.normalizeContextCancellationError(this.inner.Close())
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}
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func (this *NormalizeContextCancellationConnectionPool) Execute(ctx context.Context, statement string, parameters ...interface{}) (uint64, error) {
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affected, err := this.inner.Execute(ctx, statement, parameters...)
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return affected, this.normalizeContextCancellationError(err)
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}
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func (this *NormalizeContextCancellationConnectionPool) Select(ctx context.Context, query string, parameters ...interface{}) (SelectResult, error) {
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result, err := this.inner.Select(ctx, query, parameters...)
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return result, this.normalizeContextCancellationError(err)
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}
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// TODO remove manual check of "use of closed network connection" with release of https://github.com/go-sql-driver/mysql/pull/1615
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func (this *NormalizeContextCancellationConnectionPool) normalizeContextCancellationError(err error) error {
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if err == nil {
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return nil
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}
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if strings.Contains(err.Error(), "operation was canceled") {
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return fmt.Errorf("%w: %w", context.Canceled, err)
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}
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if strings.Contains(err.Error(), "use of closed network connection") {
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return fmt.Errorf("%w: %w", context.Canceled, err)
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}
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return err
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}

‎normalize_context_cancellation_connection_pool_test.go

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package sqldb
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import (
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"context"
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"errors"
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"testing"
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"github.com/smarty/assertions/should"
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"github.com/smarty/gunit"
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)
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func TestNormalizeContextCancellationConnectionPoolFixture(t *testing.T) {
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gunit.Run(new(NormalizeContextCancellationConnectionPoolFixture), t)
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}
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type NormalizeContextCancellationConnectionPoolFixture struct {
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*gunit.Fixture
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inner *FakeConnectionPool
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adapter *NormalizeContextCancellationConnectionPool
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) Setup() {
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this.inner = &FakeConnectionPool{}
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this.adapter = NewNormalizeContextCancellationConnectionPool(this.inner)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestPing_Successful() {
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err := this.adapter.Ping(context.Background())
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this.So(err, should.BeNil)
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this.So(this.inner.pingCalls, should.Equal, 1)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestPing_Failed() {
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pingErr := errors.New("PING ERROR")
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this.inner.pingError = pingErr
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err := this.adapter.Ping(context.Background())
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this.So(this.inner.pingCalls, should.Equal, 1)
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this.So(err, should.Equal, pingErr)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestPing_AdaptContextCancelled() {
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this.inner.pingError = operationCanceledErr
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err := this.adapter.Ping(context.Background())
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this.So(this.inner.pingCalls, should.Equal, 1)
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this.So(errors.Is(err, operationCanceledErr), should.BeTrue)
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this.So(errors.Is(err, context.Canceled), should.BeTrue)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestBeginTransaction_Successful() {
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transaction := new(FakeTransaction)
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this.inner.transaction = transaction
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tx, err := this.adapter.BeginTransaction(context.Background())
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this.So(err, should.BeNil)
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this.So(this.inner.transactionCalls, should.Equal, 1)
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this.So(tx, should.NotBeNil)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestBeginTransaction_Failed() {
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transactionErr := errors.New("BEGIN TRANSACTION ERROR")
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this.inner.transactionError = transactionErr
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tx, err := this.adapter.BeginTransaction(context.Background())
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this.So(tx, should.BeNil)
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this.So(err, should.Equal, transactionErr)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestBeginTransaction_AdaptContextCancelled() {
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this.inner.transactionError = operationCanceledErr
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tx, err := this.adapter.BeginTransaction(context.Background())
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this.So(tx, should.BeNil)
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this.So(errors.Is(err, operationCanceledErr), should.BeTrue)
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this.So(errors.Is(err, context.Canceled), should.BeTrue)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestClose_Successful() {
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err := this.adapter.Close()
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this.So(err, should.BeNil)
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this.So(this.inner.closeCalls, should.Equal, 1)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestClose_Failed() {
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closeErr := errors.New("CLOSE ERROR")
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this.inner.closeError = closeErr
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err := this.adapter.Close()
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this.So(this.inner.closeCalls, should.Equal, 1)
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this.So(err, should.Equal, closeErr)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestClose_AdaptContextCancelled() {
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this.inner.closeError = operationCanceledErr
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err := this.adapter.Close()
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this.So(this.inner.closeCalls, should.Equal, 1)
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this.So(errors.Is(err, operationCanceledErr), should.BeTrue)
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this.So(errors.Is(err, context.Canceled), should.BeTrue)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestExecute_Successful() {
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this.inner.executeResult = 42
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result, err := this.adapter.Execute(context.Background(), "statement")
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this.So(result, should.Equal, 42)
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this.So(err, should.BeNil)
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this.So(this.inner.executeCalls, should.Equal, 1)
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this.So(this.inner.executeStatement, should.Equal, "statement")
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestExecute_Failed() {
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this.inner.executeResult = 42
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executeErr := errors.New("EXECUTE ERROR")
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this.inner.executeError = executeErr
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result, err := this.adapter.Execute(context.Background(), "statement")
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this.So(result, should.Equal, 42)
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this.So(err, should.Equal, executeErr)
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this.So(this.inner.executeCalls, should.Equal, 1)
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this.So(this.inner.executeStatement, should.Equal, "statement")
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestExecute_AdaptContextCancelled() {
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this.inner.executeResult = 42
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this.inner.executeError = operationCanceledErr
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result, err := this.adapter.Execute(context.Background(), "statement")
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this.So(result, should.Equal, 42)
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this.So(this.inner.executeCalls, should.Equal, 1)
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this.So(this.inner.executeStatement, should.Equal, "statement")
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this.So(errors.Is(err, operationCanceledErr), should.BeTrue)
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this.So(errors.Is(err, context.Canceled), should.BeTrue)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestSelect_Successful() {
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expectedResult := new(FakeSelectResult)
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this.inner.selectResult = expectedResult
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result, err := this.adapter.Select(context.Background(), "query", 1, 2, 3)
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this.So(result, should.Equal, expectedResult)
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this.So(err, should.BeNil)
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this.So(this.inner.selectCalls, should.Equal, 1)
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this.So(this.inner.selectStatement, should.Equal, "query")
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this.So(this.inner.selectParameters, should.Equal, []any{1, 2, 3})
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestSelect_Failed() {
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expectedResult := new(FakeSelectResult)
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this.inner.selectResult = expectedResult
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selectErr := errors.New("SELECT ERROR")
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this.inner.selectError = selectErr
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result, err := this.adapter.Select(context.Background(), "query", 1, 2, 3)
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this.So(result, should.Equal, expectedResult)
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this.So(err, should.Equal, selectErr)
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this.So(this.inner.selectCalls, should.Equal, 1)
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this.So(this.inner.selectStatement, should.Equal, "query")
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this.So(this.inner.selectParameters, should.Equal, []any{1, 2, 3})
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestSelect_AdaptContextCancelled() {
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expectedResult := new(FakeSelectResult)
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this.inner.selectResult = expectedResult
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this.inner.selectError = operationCanceledErr
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result, err := this.adapter.Select(context.Background(), "query", 1, 2, 3)
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this.So(result, should.Equal, expectedResult)
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this.So(this.inner.selectCalls, should.Equal, 1)
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this.So(this.inner.selectStatement, should.Equal, "query")
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this.So(this.inner.selectParameters, should.Equal, []any{1, 2, 3})
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this.So(errors.Is(err, operationCanceledErr), should.BeTrue)
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this.So(errors.Is(err, context.Canceled), should.BeTrue)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestContextCancellationErrorAdapter_NilError() {
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err := this.adapter.normalizeContextCancellationError(nil)
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this.So(err, should.BeNil)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestContextCancellationErrorAdapter_GenericError() {
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genericErr := errors.New("generic error")
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err := this.adapter.normalizeContextCancellationError(genericErr)
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this.So(err, should.Equal, genericErr)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestContextCancellationErrorAdapter_OperationCanceledError() {
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err := this.adapter.normalizeContextCancellationError(operationCanceledErr)
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this.So(errors.Is(err, operationCanceledErr), should.BeTrue)
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this.So(errors.Is(err, context.Canceled), should.BeTrue)
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}
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func (this *NormalizeContextCancellationConnectionPoolFixture) TestContextCancellationErrorAdapter_ClosedConnectionError() {
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err := this.adapter.normalizeContextCancellationError(closedNetworkConnectionErr)
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this.So(errors.Is(err, closedNetworkConnectionErr), should.BeTrue)
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this.So(errors.Is(err, context.Canceled), should.BeTrue)
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}
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var (
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operationCanceledErr = errors.New("operation was canceled")
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closedNetworkConnectionErr = errors.New("use of closed network connection")
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)

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