internal/pkg/olterrors/olterrors.go - voltha-openolt-adapter - Gitiles

 /*
  * Copyright 2020-2022 Open Networking Foundation (ONF) and the ONF Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 //Package olterrors implements functions to manipulate OLT errors
 package olterrors

 import (
 	"context"
 	"encoding/json"
 	"fmt"
 	"strings"

 	"github.com/opencord/voltha-lib-go/v7/pkg/log"
 )

 const (
 	defaultLogAndReturnLevel = log.ErrorLevel
 )

 func copy(src log.Fields) log.Fields {
 	dst := make(log.Fields)
 	for k, v := range src {
 		dst[k] = v
 	}
 	return dst
 }

 func merge(one, two log.Fields) log.Fields {
 	dst := make(log.Fields)
 	for k, v := range one {
 		dst[k] = v
 	}
 	for k, v := range two {
 		dst[k] = v
 	}
 	return dst
 }

 // LoggableError defined functions that can be used to log an object
 type LoggableError interface {
 	error
 	Log() error
 	LogAt(log.LogLevel) error
 }

 // WrappedError can be used to extract the wrapped errors of structs that include ErrAdapter
 type WrappedError interface {
 	Unwrap() error
 }

 // ErrAdapter represents a basic adapter error that combines an name, field set
 // and wrapped error
 type ErrAdapter struct {
 	name    string
 	fields  log.Fields
 	wrapped error
 }

 // NewErrAdapter constructs a new error with the given values
 func NewErrAdapter(name string, fields log.Fields, wrapped error) LoggableError {
 	return &ErrAdapter{
 		name:    name,
 		fields:  copy(fields),
 		wrapped: wrapped,
 	}
 }

 // Name returns the error name
 func (e *ErrAdapter) Name() string {
 	return e.name
 }

 // Fields returns the fields associated with the error
 func (e *ErrAdapter) Fields() log.Fields {
 	return e.fields
 }

 // Unwrap returns the wrapped or nested error
 func (e *ErrAdapter) Unwrap() error {
 	return e.wrapped
 }

 // Error returns a string representation of the error
 func (e *ErrAdapter) Error() string {
 	ctx := context.Background()
 	var buf strings.Builder
 	_, er := buf.WriteString(e.name)
 	if er != nil {
 		logger.Error(ctx, er)
 	}
 	if len(e.fields) > 0 {
 		if val, err := json.Marshal(e.fields); err == nil {
 			_, er = buf.WriteString(fmt.Sprintf(": [%s]", string(val)))
 			if er != nil {
 				logger.Error(ctx, er)
 			}
 		}
 	}
 	if e.wrapped != nil {
 		_, er = buf.WriteString(fmt.Sprintf(": %s", e.wrapped.Error()))
 		if er != nil {
 			logger.Error(ctx, er)
 		}
 	}
 	return buf.String()
 }

 // Log logs the error at the default level for log and return
 func (e *ErrAdapter) Log() error {
 	return e.LogAt(defaultLogAndReturnLevel)
 }

 // LogAt logs the error at the specified level and then returns the error
 func (e *ErrAdapter) LogAt(level log.LogLevel) error {
 	loggerFunc := logger.Debugw
 	switch level {
 	case log.InfoLevel:
 		loggerFunc = logger.Infow
 	case log.WarnLevel:
 		loggerFunc = logger.Warnw
 	case log.ErrorLevel:
 		loggerFunc = logger.Errorw
 	case log.FatalLevel:
 		loggerFunc = logger.Fatalw
 	}
 	local := e.fields
 	if e.wrapped != nil {
 		local = merge(e.fields, log.Fields{"wrapped": e.wrapped})
 	}
 	loggerFunc(context.Background(), e.name, local)
 	return e
 }

 // ErrInvalidValue represents an error condition with given value is not able to
 // be processed
 type ErrInvalidValue struct {
 	ErrAdapter
 }

 // NewErrInvalidValue constructs a new error based on the given values
 func NewErrInvalidValue(fields log.Fields, wrapped error) LoggableError {
 	return &ErrInvalidValue{
 		ErrAdapter{
 			name:    "invalid-value",
 			fields:  copy(fields),
 			wrapped: wrapped,
 		},
 	}
 }

 // Log logs the error at the default level for log and return
 func (e *ErrInvalidValue) Log() error {
 	_ = e.ErrAdapter.Log()
 	return e
 }

 // LogAt logs the error at the specified level and then returns the error
 func (e *ErrInvalidValue) LogAt(level log.LogLevel) error {
 	_ = e.ErrAdapter.LogAt(level)
 	return e
 }

 // ErrNotFound represents an error condition when a value can not be located
 // given a field set of criteria
 type ErrNotFound struct {
 	ErrAdapter
 }

 // NewErrNotFound constructs a new error based on the given values
 func NewErrNotFound(target string, fields log.Fields, wrapped error) LoggableError {
 	return &ErrNotFound{
 		ErrAdapter{
 			name:    "not-found",
 			fields:  merge(fields, log.Fields{"target": target}),
 			wrapped: wrapped,
 		},
 	}
 }

 // Log logs the error at the default level for log and return
 func (e *ErrNotFound) Log() error {
 	_ = e.ErrAdapter.Log()
 	return e
 }

 // LogAt logs the error at the specified level and then returns the error
 func (e *ErrNotFound) LogAt(level log.LogLevel) error {
 	_ = e.ErrAdapter.LogAt(level)
 	return e
 }

 // ErrPersistence representation an error condition when a persistence operation
 // did not succeed
 type ErrPersistence struct {
 	ErrAdapter
 }

 // NewErrPersistence constructs a new error based on the given values
 func NewErrPersistence(operation, entityType string, ID uint64, fields log.Fields, wrapped error) LoggableError {
 	return &ErrPersistence{
 		ErrAdapter{
 			name: "unable-to-persist",
 			fields: merge(fields, log.Fields{
 				"operation":   operation,
 				"entity-type": entityType,
 				"id":          fmt.Sprintf("0x%x", ID)}),
 			wrapped: wrapped,
 		},
 	}
 }

 // Log logs the error at the default level for log and return
 func (e *ErrPersistence) Log() error {
 	_ = e.ErrAdapter.Log()
 	return e
 }

 // LogAt logs the error at the specified level and then returns the error
 func (e *ErrPersistence) LogAt(level log.LogLevel) error {
 	_ = e.ErrAdapter.LogAt(level)
 	return e
 }

 // ErrCommunication representation an error condition when an interprocess
 // message communication fails
 type ErrCommunication struct {
 	ErrAdapter
 }

 // NewErrCommunication constructs a new error based on the given values
 func NewErrCommunication(operation string, fields log.Fields, wrapped error) LoggableError {
 	return &ErrCommunication{
 		ErrAdapter{
 			name: "failed-communication",
 			fields: merge(fields, log.Fields{
 				"operation": operation}),
 			wrapped: wrapped,
 		},
 	}
 }

 // Log logs the error at the default level for log and return
 func (e *ErrCommunication) Log() error {
 	_ = e.ErrAdapter.Log()
 	return e
 }

 // LogAt logs the error at the specified level and then returns the error
 func (e *ErrCommunication) LogAt(level log.LogLevel) error {
 	_ = e.ErrAdapter.LogAt(level)
 	return e
 }

 // ErrFlowOp represents an error condition when a flow operation to a device did
 // not succeed
 type ErrFlowOp struct {
 	ErrAdapter
 }

 // NewErrFlowOp constructs a new error based on the given values
 func NewErrFlowOp(operation string, ID uint64, fields log.Fields, wrapped error) LoggableError {
 	return &ErrPersistence{
 		ErrAdapter{
 			name: "unable-to-perform-flow-operation",
 			fields: merge(fields, log.Fields{
 				"operation": operation,
 				"id":        fmt.Sprintf("0x%x", ID)}),
 			wrapped: wrapped,
 		},
 	}
 }

 // Log logs the error at the default level for log and return
 func (e *ErrFlowOp) Log() error {
 	_ = e.ErrAdapter.Log()
 	return e
 }

 // LogAt logs the error at the specified level and then returns the error
 func (e *ErrFlowOp) LogAt(level log.LogLevel) error {
 	_ = e.ErrAdapter.LogAt(level)
 	return e
 }

 // ErrGroupOp represents an error condition when a group operation to a device did
 // not succeed
 type ErrGroupOp struct {
 	ErrAdapter
 }

 // NewErrGroupOp constructs a new error based on the given values
 func NewErrGroupOp(operation string, ID uint32, fields log.Fields, wrapped error) LoggableError {
 	return &ErrPersistence{
 		ErrAdapter{
 			name: "unable-to-perform-group-operation",
 			fields: merge(fields, log.Fields{
 				"operation": operation,
 				"id":        fmt.Sprintf("0x%x", ID)}),
 			wrapped: wrapped,
 		},
 	}
 }

 // Log logs the error at the default level for log and return
 func (e *ErrGroupOp) Log() error {
 	_ = e.ErrAdapter.Log()
 	return e
 }

 // LogAt logs the error at the specified level and then returns the error
 func (e *ErrGroupOp) LogAt(level log.LogLevel) error {
 	_ = e.ErrAdapter.LogAt(level)
 	return e
 }

 // ErrTimeout represents an error condition when the deadline for performing an
 // operation has been exceeded
 type ErrTimeout struct {
 	ErrAdapter
 }

 // NewErrTimeout constructs a new error based on the given values
 func NewErrTimeout(operation string, fields log.Fields, wrapped error) LoggableError {
 	return &ErrTimeout{
 		ErrAdapter{
 			name:    "operation-timed-out",
 			fields:  merge(fields, log.Fields{"operation": operation}),
 			wrapped: wrapped,
 		},
 	}
 }

 // Log logs the error at the default level for log and return
 func (e *ErrTimeout) Log() error {
 	_ = e.ErrAdapter.Log()
 	return e
 }

 // LogAt logs the error at the specified level and then returns the error
 func (e *ErrTimeout) LogAt(level log.LogLevel) error {
 	_ = e.ErrAdapter.LogAt(level)
 	return e
 }

 var (
 	// ErrNotImplemented error returned when an unimplemented method is
 	// invoked
 	ErrNotImplemented = NewErrAdapter("not-implemented", nil, nil)

 	// ErrInvalidPortRange error returned when a given port is not in the
 	// valid range
 	ErrInvalidPortRange = NewErrAdapter("invalid-port-range", nil, nil)

 	// ErrStateTransition error returned when a state transition is fails
 	ErrStateTransition = NewErrAdapter("state-transition", nil, nil)

 	// ErrResourceManagerInstantiating error returned when an unexpected
 	// condition occcurs while instantiating the resource manager
 	ErrResourceManagerInstantiating = NewErrAdapter("resoure-manager-instantiating", nil, nil)

 	// ErrFlowManagerInstantiating error returned when an unexpected
 	// condition occcurs while instantiating the flow manager
 	ErrFlowManagerInstantiating = NewErrAdapter("flow-manager-instantiating", nil, nil)

 	// ErrGroupManagerInstantiating error returned when an unexpected
 	// condition occcurs while instantiating the group manager
 	ErrGroupManagerInstantiating = NewErrAdapter("group-manager-instantiating", nil, nil)
 )
	/*
	* Copyright 2020-2022 Open Networking Foundation (ONF) and the ONF Contributors
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	//Package olterrors implements functions to manipulate OLT errors
	package olterrors

	import (
	"context"
	"encoding/json"
	"fmt"
	"strings"

	"github.com/opencord/voltha-lib-go/v7/pkg/log"
	)

	const (
	defaultLogAndReturnLevel = log.ErrorLevel
	)

	func copy(src log.Fields) log.Fields {
	dst := make(log.Fields)
	for k, v := range src {
	dst[k] = v
	}
	return dst
	}

	func merge(one, two log.Fields) log.Fields {
	dst := make(log.Fields)
	for k, v := range one {
	dst[k] = v
	}
	for k, v := range two {
	dst[k] = v
	}
	return dst
	}

	// LoggableError defined functions that can be used to log an object
	type LoggableError interface {
	error
	Log() error
	LogAt(log.LogLevel) error
	}

	// WrappedError can be used to extract the wrapped errors of structs that include ErrAdapter
	type WrappedError interface {
	Unwrap() error
	}

	// ErrAdapter represents a basic adapter error that combines an name, field set
	// and wrapped error
	type ErrAdapter struct {
	name string
	fields log.Fields
	wrapped error
	}

	// NewErrAdapter constructs a new error with the given values
	func NewErrAdapter(name string, fields log.Fields, wrapped error) LoggableError {
	return &ErrAdapter{
	name: name,
	fields: copy(fields),
	wrapped: wrapped,
	}
	}

	// Name returns the error name
	func (e *ErrAdapter) Name() string {
	return e.name
	}

	// Fields returns the fields associated with the error
	func (e *ErrAdapter) Fields() log.Fields {
	return e.fields
	}

	// Unwrap returns the wrapped or nested error
	func (e *ErrAdapter) Unwrap() error {
	return e.wrapped
	}

	// Error returns a string representation of the error
	func (e *ErrAdapter) Error() string {
	ctx := context.Background()
	var buf strings.Builder
	_, er := buf.WriteString(e.name)
	if er != nil {
	logger.Error(ctx, er)
	}
	if len(e.fields) > 0 {
	if val, err := json.Marshal(e.fields); err == nil {
	_, er = buf.WriteString(fmt.Sprintf(": [%s]", string(val)))
	if er != nil {
	logger.Error(ctx, er)
	}
	}
	}
	if e.wrapped != nil {
	_, er = buf.WriteString(fmt.Sprintf(": %s", e.wrapped.Error()))
	if er != nil {
	logger.Error(ctx, er)
	}
	}
	return buf.String()
	}

	// Log logs the error at the default level for log and return
	func (e *ErrAdapter) Log() error {
	return e.LogAt(defaultLogAndReturnLevel)
	}

	// LogAt logs the error at the specified level and then returns the error
	func (e *ErrAdapter) LogAt(level log.LogLevel) error {
	loggerFunc := logger.Debugw
	switch level {
	case log.InfoLevel:
	loggerFunc = logger.Infow
	case log.WarnLevel:
	loggerFunc = logger.Warnw
	case log.ErrorLevel:
	loggerFunc = logger.Errorw
	case log.FatalLevel:
	loggerFunc = logger.Fatalw
	}
	local := e.fields
	if e.wrapped != nil {
	local = merge(e.fields, log.Fields{"wrapped": e.wrapped})
	}
	loggerFunc(context.Background(), e.name, local)
	return e
	}

	// ErrInvalidValue represents an error condition with given value is not able to
	// be processed
	type ErrInvalidValue struct {
	ErrAdapter
	}

	// NewErrInvalidValue constructs a new error based on the given values
	func NewErrInvalidValue(fields log.Fields, wrapped error) LoggableError {
	return &ErrInvalidValue{
	ErrAdapter{
	name: "invalid-value",
	fields: copy(fields),
	wrapped: wrapped,
	},
	}
	}

	// Log logs the error at the default level for log and return
	func (e *ErrInvalidValue) Log() error {
	_ = e.ErrAdapter.Log()
	return e
	}

	// LogAt logs the error at the specified level and then returns the error
	func (e *ErrInvalidValue) LogAt(level log.LogLevel) error {
	_ = e.ErrAdapter.LogAt(level)
	return e
	}

	// ErrNotFound represents an error condition when a value can not be located
	// given a field set of criteria
	type ErrNotFound struct {
	ErrAdapter
	}

	// NewErrNotFound constructs a new error based on the given values
	func NewErrNotFound(target string, fields log.Fields, wrapped error) LoggableError {
	return &ErrNotFound{
	ErrAdapter{
	name: "not-found",
	fields: merge(fields, log.Fields{"target": target}),
	wrapped: wrapped,
	},
	}
	}

	// Log logs the error at the default level for log and return
	func (e *ErrNotFound) Log() error {
	_ = e.ErrAdapter.Log()
	return e
	}

	// LogAt logs the error at the specified level and then returns the error
	func (e *ErrNotFound) LogAt(level log.LogLevel) error {
	_ = e.ErrAdapter.LogAt(level)
	return e
	}

	// ErrPersistence representation an error condition when a persistence operation
	// did not succeed
	type ErrPersistence struct {
	ErrAdapter
	}

	// NewErrPersistence constructs a new error based on the given values
	func NewErrPersistence(operation, entityType string, ID uint64, fields log.Fields, wrapped error) LoggableError {
	return &ErrPersistence{
	ErrAdapter{
	name: "unable-to-persist",
	fields: merge(fields, log.Fields{
	"operation": operation,
	"entity-type": entityType,
	"id": fmt.Sprintf("0x%x", ID)}),
	wrapped: wrapped,
	},
	}
	}

	// Log logs the error at the default level for log and return
	func (e *ErrPersistence) Log() error {
	_ = e.ErrAdapter.Log()
	return e
	}

	// LogAt logs the error at the specified level and then returns the error
	func (e *ErrPersistence) LogAt(level log.LogLevel) error {
	_ = e.ErrAdapter.LogAt(level)
	return e
	}

	// ErrCommunication representation an error condition when an interprocess
	// message communication fails
	type ErrCommunication struct {
	ErrAdapter
	}

	// NewErrCommunication constructs a new error based on the given values
	func NewErrCommunication(operation string, fields log.Fields, wrapped error) LoggableError {
	return &ErrCommunication{
	ErrAdapter{
	name: "failed-communication",
	fields: merge(fields, log.Fields{
	"operation": operation}),
	wrapped: wrapped,
	},
	}
	}

	// Log logs the error at the default level for log and return
	func (e *ErrCommunication) Log() error {
	_ = e.ErrAdapter.Log()
	return e
	}

	// LogAt logs the error at the specified level and then returns the error
	func (e *ErrCommunication) LogAt(level log.LogLevel) error {
	_ = e.ErrAdapter.LogAt(level)
	return e
	}

	// ErrFlowOp represents an error condition when a flow operation to a device did
	// not succeed
	type ErrFlowOp struct {
	ErrAdapter
	}

	// NewErrFlowOp constructs a new error based on the given values
	func NewErrFlowOp(operation string, ID uint64, fields log.Fields, wrapped error) LoggableError {
	return &ErrPersistence{
	ErrAdapter{
	name: "unable-to-perform-flow-operation",
	fields: merge(fields, log.Fields{
	"operation": operation,
	"id": fmt.Sprintf("0x%x", ID)}),
	wrapped: wrapped,
	},
	}
	}

	// Log logs the error at the default level for log and return
	func (e *ErrFlowOp) Log() error {
	_ = e.ErrAdapter.Log()
	return e
	}

	// LogAt logs the error at the specified level and then returns the error
	func (e *ErrFlowOp) LogAt(level log.LogLevel) error {
	_ = e.ErrAdapter.LogAt(level)
	return e
	}

	// ErrGroupOp represents an error condition when a group operation to a device did
	// not succeed
	type ErrGroupOp struct {
	ErrAdapter
	}

	// NewErrGroupOp constructs a new error based on the given values
	func NewErrGroupOp(operation string, ID uint32, fields log.Fields, wrapped error) LoggableError {
	return &ErrPersistence{
	ErrAdapter{
	name: "unable-to-perform-group-operation",
	fields: merge(fields, log.Fields{
	"operation": operation,
	"id": fmt.Sprintf("0x%x", ID)}),
	wrapped: wrapped,
	},
	}
	}

	// Log logs the error at the default level for log and return
	func (e *ErrGroupOp) Log() error {
	_ = e.ErrAdapter.Log()
	return e
	}

	// LogAt logs the error at the specified level and then returns the error
	func (e *ErrGroupOp) LogAt(level log.LogLevel) error {
	_ = e.ErrAdapter.LogAt(level)
	return e
	}

	// ErrTimeout represents an error condition when the deadline for performing an
	// operation has been exceeded
	type ErrTimeout struct {
	ErrAdapter
	}

	// NewErrTimeout constructs a new error based on the given values
	func NewErrTimeout(operation string, fields log.Fields, wrapped error) LoggableError {
	return &ErrTimeout{
	ErrAdapter{
	name: "operation-timed-out",
	fields: merge(fields, log.Fields{"operation": operation}),
	wrapped: wrapped,
	},
	}
	}

	// Log logs the error at the default level for log and return
	func (e *ErrTimeout) Log() error {
	_ = e.ErrAdapter.Log()
	return e
	}

	// LogAt logs the error at the specified level and then returns the error
	func (e *ErrTimeout) LogAt(level log.LogLevel) error {
	_ = e.ErrAdapter.LogAt(level)
	return e
	}

	var (
	// ErrNotImplemented error returned when an unimplemented method is
	// invoked
	ErrNotImplemented = NewErrAdapter("not-implemented", nil, nil)

	// ErrInvalidPortRange error returned when a given port is not in the
	// valid range
	ErrInvalidPortRange = NewErrAdapter("invalid-port-range", nil, nil)

	// ErrStateTransition error returned when a state transition is fails
	ErrStateTransition = NewErrAdapter("state-transition", nil, nil)

	// ErrResourceManagerInstantiating error returned when an unexpected
	// condition occcurs while instantiating the resource manager
	ErrResourceManagerInstantiating = NewErrAdapter("resoure-manager-instantiating", nil, nil)

	// ErrFlowManagerInstantiating error returned when an unexpected
	// condition occcurs while instantiating the flow manager
	ErrFlowManagerInstantiating = NewErrAdapter("flow-manager-instantiating", nil, nil)

	// ErrGroupManagerInstantiating error returned when an unexpected
	// condition occcurs while instantiating the group manager
	ErrGroupManagerInstantiating = NewErrAdapter("group-manager-instantiating", nil, nil)
	)