131 lines
3.5 KiB
Go
131 lines
3.5 KiB
Go
package pgxpool
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import (
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"context"
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"sync/atomic"
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"github.com/jackc/pgx/v5"
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"github.com/jackc/pgx/v5/pgconn"
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"github.com/jackc/puddle/v2"
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)
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// Conn is an acquired *pgx.Conn from a Pool.
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type Conn struct {
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res *puddle.Resource[*connResource]
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p *Pool
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}
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// Release returns c to the pool it was acquired from. Once Release has been called, other methods must not be called.
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// However, it is safe to call Release multiple times. Subsequent calls after the first will be ignored.
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func (c *Conn) Release() {
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if c.res == nil {
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return
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}
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conn := c.Conn()
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res := c.res
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c.res = nil
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if conn.IsClosed() || conn.PgConn().IsBusy() || conn.PgConn().TxStatus() != 'I' {
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res.Destroy()
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// Signal to the health check to run since we just destroyed a connections
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// and we might be below minConns now
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c.p.triggerHealthCheck()
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return
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}
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// If the pool is consistently being used, we might never get to check the
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// lifetime of a connection since we only check idle connections in checkConnsHealth
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// so we also check the lifetime here and force a health check
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if c.p.isExpired(res) {
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atomic.AddInt64(&c.p.lifetimeDestroyCount, 1)
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res.Destroy()
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// Signal to the health check to run since we just destroyed a connections
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// and we might be below minConns now
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c.p.triggerHealthCheck()
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return
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}
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if c.p.afterRelease == nil {
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res.Release()
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return
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}
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go func() {
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if c.p.afterRelease(conn) {
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res.Release()
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} else {
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res.Destroy()
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// Signal to the health check to run since we just destroyed a connections
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// and we might be below minConns now
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c.p.triggerHealthCheck()
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}
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}()
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}
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// Hijack assumes ownership of the connection from the pool. Caller is responsible for closing the connection. Hijack
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// will panic if called on an already released or hijacked connection.
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func (c *Conn) Hijack() *pgx.Conn {
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if c.res == nil {
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panic("cannot hijack already released or hijacked connection")
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}
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conn := c.Conn()
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res := c.res
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c.res = nil
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res.Hijack()
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return conn
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}
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func (c *Conn) Exec(ctx context.Context, sql string, arguments ...any) (pgconn.CommandTag, error) {
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return c.Conn().Exec(ctx, sql, arguments...)
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}
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func (c *Conn) Query(ctx context.Context, sql string, args ...any) (pgx.Rows, error) {
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return c.Conn().Query(ctx, sql, args...)
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}
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func (c *Conn) QueryRow(ctx context.Context, sql string, args ...any) pgx.Row {
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return c.Conn().QueryRow(ctx, sql, args...)
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}
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func (c *Conn) SendBatch(ctx context.Context, b *pgx.Batch) pgx.BatchResults {
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return c.Conn().SendBatch(ctx, b)
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}
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func (c *Conn) CopyFrom(ctx context.Context, tableName pgx.Identifier, columnNames []string, rowSrc pgx.CopyFromSource) (int64, error) {
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return c.Conn().CopyFrom(ctx, tableName, columnNames, rowSrc)
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}
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// Begin starts a transaction block from the *Conn without explicitly setting a transaction mode (see BeginTx with TxOptions if transaction mode is required).
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func (c *Conn) Begin(ctx context.Context) (pgx.Tx, error) {
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return c.Conn().Begin(ctx)
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}
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// BeginTx starts a transaction block from the *Conn with txOptions determining the transaction mode.
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func (c *Conn) BeginTx(ctx context.Context, txOptions pgx.TxOptions) (pgx.Tx, error) {
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return c.Conn().BeginTx(ctx, txOptions)
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}
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func (c *Conn) Ping(ctx context.Context) error {
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return c.Conn().Ping(ctx)
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}
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func (c *Conn) Conn() *pgx.Conn {
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return c.connResource().conn
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}
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func (c *Conn) connResource() *connResource {
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return c.res.Value()
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}
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func (c *Conn) getPoolRow(r pgx.Row) *poolRow {
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return c.connResource().getPoolRow(c, r)
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}
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func (c *Conn) getPoolRows(r pgx.Rows) *poolRows {
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return c.connResource().getPoolRows(c, r)
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}
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