8985480264

Committed 07 May 2024 12:38PM UTC coverage: 80.302%. Remained the same

Build # 8985480264

Build Type

push

github

Committed by

web-flow

Commit Message

Merge pull request #1217 from Permify/dependabot/go_modules/github.com/pressly/goose/v3-3.20.0

build(deps): bump github.com/pressly/goose/v3 from 3.19.2 to 3.20.0

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66.67

/internal/storage/postgres/utils/common.go

package utils

import (
        "context"
        "errors"
        "fmt"
        "log/slog"
        "math"
        "strings"
        "time"

        "go.opentelemetry.io/otel/codes"
        "golang.org/x/exp/rand"

        "go.opentelemetry.io/otel/trace"

        "github.com/Masterminds/squirrel"

        base "github.com/Permify/permify/pkg/pb/base/v1"
)

const (
        BulkEntityFilterTemplate = `
    WITH entities AS (
        (SELECT id, entity_id, entity_type, tenant_id, created_tx_id, expired_tx_id FROM relation_tuples)
        UNION ALL
        (SELECT id, entity_id, entity_type, tenant_id, created_tx_id, expired_tx_id FROM attributes)
    ), filtered_entities AS (
        SELECT DISTINCT ON (entity_id) id, entity_id
        FROM entities
        WHERE tenant_id = '%s'
        AND entity_type = '%s'
        AND %s
        AND %s
    )
    SELECT id, entity_id
    FROM filtered_entities`

        TransactionTemplate  = `INSERT INTO transactions (tenant_id) VALUES ($1) RETURNING id`
        InsertTenantTemplate = `INSERT INTO tenants (id, name) VALUES ($1, $2) RETURNING created_at`
        DeleteTenantTemplate = `DELETE FROM tenants WHERE id = $1 RETURNING name, created_at`
)

// SnapshotQuery adds conditions to a SELECT query for checking transaction visibility based on created and expired transaction IDs.
// The query checks if transactions are visible in a snapshot associated with the provided value.
func SnapshotQuery(sl squirrel.SelectBuilder, value uint64) squirrel.SelectBuilder {
        // Convert the value to a string once to reduce redundant calls to fmt.Sprintf.
        valStr := fmt.Sprintf("'%v'::xid8", value)

        // Create a subquery for the snapshot associated with the provided value.
        snapshotQuery := fmt.Sprintf("(select snapshot from transactions where id = %s)", valStr)

        // Create an expression to check if a transaction with a specific created_tx_id is visible in the snapshot.
        visibilityExpr := squirrel.Expr(fmt.Sprintf("pg_visible_in_snapshot(created_tx_id, %s) = true", snapshotQuery))
        // Create an expression to check if the created_tx_id is equal to the provided value.
        createdExpr := squirrel.Expr(fmt.Sprintf("created_tx_id = %s", valStr))
        // Use OR condition for the created expressions.
        createdWhere := squirrel.Or{visibilityExpr, createdExpr}

        // Create an expression to check if a transaction with a specific expired_tx_id is not visible in the snapshot.
        expiredVisibilityExpr := squirrel.Expr(fmt.Sprintf("pg_visible_in_snapshot(expired_tx_id, %s) = false", snapshotQuery))
        // Create an expression to check if the expired_tx_id is equal to zero.
        expiredZeroExpr := squirrel.Expr("expired_tx_id = '0'::xid8")
        // Create an expression to check if the expired_tx_id is not equal to the provided value.
        expiredNotExpr := squirrel.Expr(fmt.Sprintf("expired_tx_id <> %s", valStr))
        // Use AND condition for the expired expressions, checking both visibility and non-equality with value.
        expiredWhere := squirrel.And{squirrel.Or{expiredVisibilityExpr, expiredZeroExpr}, expiredNotExpr}

        // Add the created and expired conditions to the SELECT query.
        return sl.Where(createdWhere).Where(expiredWhere)
}

// snapshotQuery function generates two strings representing conditions to be applied in a SQL query to filter data based on visibility of transactions.
func snapshotQuery(value uint64) (string, string) {
        // Convert the provided value into a string format suitable for our SQL query, formatted as a transaction ID.
        valStr := fmt.Sprintf("'%v'::xid8", value)

        // Create a subquery that fetches the snapshot associated with the transaction ID.
        snapshotQ := fmt.Sprintf("(SELECT snapshot FROM transactions WHERE id = %s)", valStr)

        // Create an expression that checks whether a transaction (represented by 'created_tx_id') is visible in the snapshot.
        visibilityExpr := fmt.Sprintf("pg_visible_in_snapshot(created_tx_id, %s) = true", snapshotQ)
        // Create an expression that checks if the 'created_tx_id' is the same as our transaction ID.
        createdExpr := fmt.Sprintf("created_tx_id = %s", valStr)
        // Combine these expressions to form a condition. A row will satisfy this condition if either of the expressions are true.
        createdWhere := fmt.Sprintf("(%s OR %s)", visibilityExpr, createdExpr)

        // Create an expression that checks whether a transaction (represented by 'expired_tx_id') is not visible in the snapshot.
        expiredVisibilityExpr := fmt.Sprintf("pg_visible_in_snapshot(expired_tx_id, %s) = false", snapshotQ)
        // Create an expression that checks if the 'expired_tx_id' is zero. This handles cases where the transaction hasn't expired.
        expiredZeroExpr := "expired_tx_id = '0'::xid8"
        // Create an expression that checks if the 'expired_tx_id' is not the same as our transaction ID.
        expiredNotExpr := fmt.Sprintf("expired_tx_id <> %s", valStr)
        // Combine these expressions to form a condition. A row will satisfy this condition if the first set of expressions are true (either the transaction hasn't expired, or if it has, it's not visible in the snapshot) and the second expression is also true (the 'expired_tx_id' is not the same as our transaction ID).
        expiredWhere := fmt.Sprintf("(%s AND %s)", fmt.Sprintf("(%s OR %s)", expiredVisibilityExpr, expiredZeroExpr), expiredNotExpr)

        // Return the conditions for both 'created' and 'expired' transactions. These can be used in a WHERE clause of a SQL query to filter results.
        return createdWhere, expiredWhere
}

// BulkEntityFilterQuery -
func BulkEntityFilterQuery(tenantID, entityType string, snap uint64) string {
        createdWhere, expiredWhere := snapshotQuery(snap)
        return fmt.Sprintf(BulkEntityFilterTemplate, tenantID, entityType, createdWhere, expiredWhere)
}

// GenerateGCQuery generates a Squirrel DELETE query builder for garbage collection.
// It constructs a query to delete expired records from the specified table
// based on the provided value, which represents a transaction ID.
func GenerateGCQuery(table string, value uint64) squirrel.DeleteBuilder {
        // Convert the provided value into a string format suitable for our SQL query, formatted as a transaction ID.
        valStr := fmt.Sprintf("'%v'::xid8", value)

        // Create a Squirrel DELETE builder for the specified table.
        deleteBuilder := squirrel.Delete(table)

        // Create an expression to check if 'expired_tx_id' is not equal to '0' (not expired).
        expiredZeroExpr := squirrel.Expr("expired_tx_id <> '0'::xid8")

        // Create an expression to check if 'expired_tx_id' is less than the provided value (before the cutoff).
        beforeExpr := squirrel.Expr(fmt.Sprintf("expired_tx_id < %s", valStr))

        // Add the WHERE clauses to the DELETE query builder to filter and delete expired data.
        return deleteBuilder.Where(expiredZeroExpr).Where(beforeExpr)
}

// HandleError records an error in the given span, logs the error, and returns a standardized error.
// This function is used for consistent error handling across different parts of the application.
func HandleError(ctx context.Context, span trace.Span, err error, errorCode base.ErrorCode) error {
        // Check if the error is context-related
        if IsContextRelatedError(ctx, err) || IsSerializationRelatedError(err) {
                // Use debug level logging for context or serialization-related errors
                slog.Debug("an error related to context or serialization was encountered during the operation", slog.String("error", err.Error()))
        } else {
                span.RecordError(err)
                span.SetStatus(codes.Error, err.Error())
                // Use error level logging for all other errors
                slog.Error("error encountered", slog.Any("error", err))
        }

        // Return a new standardized error with the provided error code
        return errors.New(errorCode.String())
}

// IsContextRelatedError checks if the error is due to context cancellation, deadline exceedance, or closed connection
func IsContextRelatedError(ctx context.Context, err error) bool {
        if errors.Is(ctx.Err(), context.Canceled) || errors.Is(ctx.Err(), context.DeadlineExceeded) {
                return true
        }
        if errors.Is(err, context.Canceled) ||
                errors.Is(err, context.DeadlineExceeded) ||
                strings.Contains(err.Error(), "conn closed") {
                return true
        }
        return false
}

// IsSerializationRelatedError checks if the error is a serialization failure, typically in database transactions.
func IsSerializationRelatedError(err error) bool {
        if strings.Contains(err.Error(), "could not serialize") ||
                strings.Contains(err.Error(), "duplicate key value") {
                return true
        }
        return false
}

// WaitWithBackoff implements an exponential backoff strategy with jitter for retries.
// It waits for a calculated duration or until the context is cancelled, whichever comes first.
func WaitWithBackoff(ctx context.Context, tenantID string, retries int) {
        backoff := time.Duration(math.Min(float64(20*time.Millisecond)*math.Pow(2, float64(retries)), float64(1*time.Second)))
        jitter := time.Duration(rand.Float64() * float64(backoff) * 0.5)
        nextBackoff := backoff + jitter
        slog.Warn("waiting before retry", slog.String("tenant_id", tenantID), slog.Int64("backoff_duration", nextBackoff.Milliseconds()))
        select {
        case <-time.After(nextBackoff):
        case <-ctx.Done():
        }
}

1	package utils
2
3	import (
4	"context"
5	"errors"
6	"fmt"
7	"log/slog"
8	"math"
9	"strings"
10	"time"
11
12	"go.opentelemetry.io/otel/codes"
13	"golang.org/x/exp/rand"
14
15	"go.opentelemetry.io/otel/trace"
16
17	"github.com/Masterminds/squirrel"
18
19	base "github.com/Permify/permify/pkg/pb/base/v1"
20	)
21
22	const (
23	BulkEntityFilterTemplate = `
24	WITH entities AS (
25	(SELECT id, entity_id, entity_type, tenant_id, created_tx_id, expired_tx_id FROM relation_tuples)
26	UNION ALL
27	(SELECT id, entity_id, entity_type, tenant_id, created_tx_id, expired_tx_id FROM attributes)
28	), filtered_entities AS (
29	SELECT DISTINCT ON (entity_id) id, entity_id
30	FROM entities
31	WHERE tenant_id = '%s'
32	AND entity_type = '%s'
33	AND %s
34	AND %s
35	)
36	SELECT id, entity_id
37	FROM filtered_entities`
38
39	TransactionTemplate = `INSERT INTO transactions (tenant_id) VALUES ($1) RETURNING id`
40	InsertTenantTemplate = `INSERT INTO tenants (id, name) VALUES ($1, $2) RETURNING created_at`
41	DeleteTenantTemplate = `DELETE FROM tenants WHERE id = $1 RETURNING name, created_at`
42	)
43
44	// SnapshotQuery adds conditions to a SELECT query for checking transaction visibility based on created and expired transaction IDs.
45	// The query checks if transactions are visible in a snapshot associated with the provided value.
46	func SnapshotQuery(sl squirrel.SelectBuilder, value uint64) squirrel.SelectBuilder {	1✔
47	// Convert the value to a string once to reduce redundant calls to fmt.Sprintf.	1✔
48	valStr := fmt.Sprintf("'%v'::xid8", value)	1✔
49		1✔
50	// Create a subquery for the snapshot associated with the provided value.	1✔
51	snapshotQuery := fmt.Sprintf("(select snapshot from transactions where id = %s)", valStr)	1✔
52		1✔
53	// Create an expression to check if a transaction with a specific created_tx_id is visible in the snapshot.	1✔
54	visibilityExpr := squirrel.Expr(fmt.Sprintf("pg_visible_in_snapshot(created_tx_id, %s) = true", snapshotQuery))	1✔
55	// Create an expression to check if the created_tx_id is equal to the provided value.	1✔
56	createdExpr := squirrel.Expr(fmt.Sprintf("created_tx_id = %s", valStr))	1✔
57	// Use OR condition for the created expressions.	1✔
58	createdWhere := squirrel.Or{visibilityExpr, createdExpr}	1✔
59		1✔
60	// Create an expression to check if a transaction with a specific expired_tx_id is not visible in the snapshot.	1✔
61	expiredVisibilityExpr := squirrel.Expr(fmt.Sprintf("pg_visible_in_snapshot(expired_tx_id, %s) = false", snapshotQuery))	1✔
62	// Create an expression to check if the expired_tx_id is equal to zero.	1✔
63	expiredZeroExpr := squirrel.Expr("expired_tx_id = '0'::xid8")	1✔
64	// Create an expression to check if the expired_tx_id is not equal to the provided value.	1✔
65	expiredNotExpr := squirrel.Expr(fmt.Sprintf("expired_tx_id <> %s", valStr))	1✔
66	// Use AND condition for the expired expressions, checking both visibility and non-equality with value.	1✔
67	expiredWhere := squirrel.And{squirrel.Or{expiredVisibilityExpr, expiredZeroExpr}, expiredNotExpr}	1✔
68		1✔
69	// Add the created and expired conditions to the SELECT query.	1✔
70	return sl.Where(createdWhere).Where(expiredWhere)	1✔
71	}	1✔
72
73	// snapshotQuery function generates two strings representing conditions to be applied in a SQL query to filter data based on visibility of transactions.
74	func snapshotQuery(value uint64) (string, string) {	1✔
75	// Convert the provided value into a string format suitable for our SQL query, formatted as a transaction ID.	1✔
76	valStr := fmt.Sprintf("'%v'::xid8", value)	1✔
77		1✔
78	// Create a subquery that fetches the snapshot associated with the transaction ID.	1✔
79	snapshotQ := fmt.Sprintf("(SELECT snapshot FROM transactions WHERE id = %s)", valStr)	1✔
80		1✔
81	// Create an expression that checks whether a transaction (represented by 'created_tx_id') is visible in the snapshot.	1✔
82	visibilityExpr := fmt.Sprintf("pg_visible_in_snapshot(created_tx_id, %s) = true", snapshotQ)	1✔
83	// Create an expression that checks if the 'created_tx_id' is the same as our transaction ID.	1✔
84	createdExpr := fmt.Sprintf("created_tx_id = %s", valStr)	1✔
85	// Combine these expressions to form a condition. A row will satisfy this condition if either of the expressions are true.	1✔
86	createdWhere := fmt.Sprintf("(%s OR %s)", visibilityExpr, createdExpr)	1✔
87		1✔
88	// Create an expression that checks whether a transaction (represented by 'expired_tx_id') is not visible in the snapshot.	1✔
89	expiredVisibilityExpr := fmt.Sprintf("pg_visible_in_snapshot(expired_tx_id, %s) = false", snapshotQ)	1✔
90	// Create an expression that checks if the 'expired_tx_id' is zero. This handles cases where the transaction hasn't expired.	1✔
91	expiredZeroExpr := "expired_tx_id = '0'::xid8"	1✔
92	// Create an expression that checks if the 'expired_tx_id' is not the same as our transaction ID.	1✔
93	expiredNotExpr := fmt.Sprintf("expired_tx_id <> %s", valStr)	1✔
94	// Combine these expressions to form a condition. A row will satisfy this condition if the first set of expressions are true (either the transaction hasn't expired, or if it has, it's not visible in the snapshot) and the second expression is also true (the 'expired_tx_id' is not the same as our transaction ID).	1✔
95	expiredWhere := fmt.Sprintf("(%s AND %s)", fmt.Sprintf("(%s OR %s)", expiredVisibilityExpr, expiredZeroExpr), expiredNotExpr)	1✔
96		1✔
97	// Return the conditions for both 'created' and 'expired' transactions. These can be used in a WHERE clause of a SQL query to filter results.	1✔
98	return createdWhere, expiredWhere	1✔
99	}	1✔
100
101	// BulkEntityFilterQuery -
102	func BulkEntityFilterQuery(tenantID, entityType string, snap uint64) string {	1✔
103	createdWhere, expiredWhere := snapshotQuery(snap)	1✔
104	return fmt.Sprintf(BulkEntityFilterTemplate, tenantID, entityType, createdWhere, expiredWhere)	1✔
105	}	1✔
106
107	// GenerateGCQuery generates a Squirrel DELETE query builder for garbage collection.
108	// It constructs a query to delete expired records from the specified table
109	// based on the provided value, which represents a transaction ID.
110	func GenerateGCQuery(table string, value uint64) squirrel.DeleteBuilder {	1✔
111	// Convert the provided value into a string format suitable for our SQL query, formatted as a transaction ID.	1✔
112	valStr := fmt.Sprintf("'%v'::xid8", value)	1✔
113		1✔
114	// Create a Squirrel DELETE builder for the specified table.	1✔
115	deleteBuilder := squirrel.Delete(table)	1✔
116		1✔
117	// Create an expression to check if 'expired_tx_id' is not equal to '0' (not expired).	1✔
118	expiredZeroExpr := squirrel.Expr("expired_tx_id <> '0'::xid8")	1✔
119		1✔
120	// Create an expression to check if 'expired_tx_id' is less than the provided value (before the cutoff).	1✔
121	beforeExpr := squirrel.Expr(fmt.Sprintf("expired_tx_id < %s", valStr))	1✔
122		1✔
123	// Add the WHERE clauses to the DELETE query builder to filter and delete expired data.	1✔
124	return deleteBuilder.Where(expiredZeroExpr).Where(beforeExpr)	1✔
125	}	1✔
126
127	// HandleError records an error in the given span, logs the error, and returns a standardized error.
128	// This function is used for consistent error handling across different parts of the application.
129	func HandleError(ctx context.Context, span trace.Span, err error, errorCode base.ErrorCode) error {	×
130	// Check if the error is context-related	×
131	if IsContextRelatedError(ctx, err) \|\| IsSerializationRelatedError(err) {	×
132	// Use debug level logging for context or serialization-related errors	×
133	slog.Debug("an error related to context or serialization was encountered during the operation", slog.String("error", err.Error()))	×
134	} else {	×
135	span.RecordError(err)	×
136	span.SetStatus(codes.Error, err.Error())	×
137	// Use error level logging for all other errors	×
138	slog.Error("error encountered", slog.Any("error", err))	×
139	}	×
140
141	// Return a new standardized error with the provided error code
142	return errors.New(errorCode.String())	×
143	}
144
145	// IsContextRelatedError checks if the error is due to context cancellation, deadline exceedance, or closed connection
146	func IsContextRelatedError(ctx context.Context, err error) bool {	×
147	if errors.Is(ctx.Err(), context.Canceled) \|\| errors.Is(ctx.Err(), context.DeadlineExceeded) {	×
148	return true	×
149	}	×
150	if errors.Is(err, context.Canceled) \|\|	×
151	errors.Is(err, context.DeadlineExceeded) \|\|	×
152	strings.Contains(err.Error(), "conn closed") {	×
153	return true	×
154	}	×
155	return false	×
156	}
157
158	// IsSerializationRelatedError checks if the error is a serialization failure, typically in database transactions.
159	func IsSerializationRelatedError(err error) bool {	×
160	if strings.Contains(err.Error(), "could not serialize") \|\|	×
161	strings.Contains(err.Error(), "duplicate key value") {	×
162	return true	×
163	}	×
164	return false	×
165	}
166
167	// WaitWithBackoff implements an exponential backoff strategy with jitter for retries.
168	// It waits for a calculated duration or until the context is cancelled, whichever comes first.
169	func WaitWithBackoff(ctx context.Context, tenantID string, retries int) {	×
170	backoff := time.Duration(math.Min(float64(20time.Millisecond)math.Pow(2, float64(retries)), float64(1*time.Second)))	×
171	jitter := time.Duration(rand.Float64() * float64(backoff) * 0.5)	×
172	nextBackoff := backoff + jitter	×
173	slog.Warn("waiting before retry", slog.String("tenant_id", tenantID), slog.Int64("backoff_duration", nextBackoff.Milliseconds()))	×
174	select {	×
175	case <-time.After(nextBackoff):	×
176	case <-ctx.Done():	×
177	}
178	}

Permify / permify / 8985480264

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