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208 lines
5.3 KiB
Go
Vendored
208 lines
5.3 KiB
Go
Vendored
package redis
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import (
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"context"
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"crypto/tls"
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"net"
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"time"
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)
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// UniversalOptions information is required by UniversalClient to establish
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// connections.
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type UniversalOptions struct {
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// Either a single address or a seed list of host:port addresses
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// of cluster/sentinel nodes.
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Addrs []string
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// Database to be selected after connecting to the server.
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// Only single-node and failover clients.
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DB int
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// Common options.
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Dialer func(ctx context.Context, network, addr string) (net.Conn, error)
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OnConnect func(ctx context.Context, cn *Conn) error
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Username string
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Password string
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SentinelPassword string
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MaxRetries int
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MinRetryBackoff time.Duration
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MaxRetryBackoff time.Duration
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DialTimeout time.Duration
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ReadTimeout time.Duration
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WriteTimeout time.Duration
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PoolSize int
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MinIdleConns int
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MaxConnAge time.Duration
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PoolTimeout time.Duration
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IdleTimeout time.Duration
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IdleCheckFrequency time.Duration
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TLSConfig *tls.Config
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// Only cluster clients.
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MaxRedirects int
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ReadOnly bool
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RouteByLatency bool
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RouteRandomly bool
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// The sentinel master name.
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// Only failover clients.
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MasterName string
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}
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// Cluster returns cluster options created from the universal options.
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func (o *UniversalOptions) Cluster() *ClusterOptions {
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if len(o.Addrs) == 0 {
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o.Addrs = []string{"127.0.0.1:6379"}
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}
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return &ClusterOptions{
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Addrs: o.Addrs,
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Dialer: o.Dialer,
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OnConnect: o.OnConnect,
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Username: o.Username,
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Password: o.Password,
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MaxRedirects: o.MaxRedirects,
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ReadOnly: o.ReadOnly,
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RouteByLatency: o.RouteByLatency,
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RouteRandomly: o.RouteRandomly,
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MaxRetries: o.MaxRetries,
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MinRetryBackoff: o.MinRetryBackoff,
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MaxRetryBackoff: o.MaxRetryBackoff,
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DialTimeout: o.DialTimeout,
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ReadTimeout: o.ReadTimeout,
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WriteTimeout: o.WriteTimeout,
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PoolSize: o.PoolSize,
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MinIdleConns: o.MinIdleConns,
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MaxConnAge: o.MaxConnAge,
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PoolTimeout: o.PoolTimeout,
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IdleTimeout: o.IdleTimeout,
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IdleCheckFrequency: o.IdleCheckFrequency,
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TLSConfig: o.TLSConfig,
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}
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}
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// Failover returns failover options created from the universal options.
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func (o *UniversalOptions) Failover() *FailoverOptions {
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if len(o.Addrs) == 0 {
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o.Addrs = []string{"127.0.0.1:26379"}
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}
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return &FailoverOptions{
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SentinelAddrs: o.Addrs,
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MasterName: o.MasterName,
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Dialer: o.Dialer,
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OnConnect: o.OnConnect,
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DB: o.DB,
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Username: o.Username,
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Password: o.Password,
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SentinelPassword: o.SentinelPassword,
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MaxRetries: o.MaxRetries,
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MinRetryBackoff: o.MinRetryBackoff,
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MaxRetryBackoff: o.MaxRetryBackoff,
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DialTimeout: o.DialTimeout,
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ReadTimeout: o.ReadTimeout,
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WriteTimeout: o.WriteTimeout,
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PoolSize: o.PoolSize,
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MinIdleConns: o.MinIdleConns,
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MaxConnAge: o.MaxConnAge,
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PoolTimeout: o.PoolTimeout,
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IdleTimeout: o.IdleTimeout,
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IdleCheckFrequency: o.IdleCheckFrequency,
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TLSConfig: o.TLSConfig,
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}
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}
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// Simple returns basic options created from the universal options.
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func (o *UniversalOptions) Simple() *Options {
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addr := "127.0.0.1:6379"
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if len(o.Addrs) > 0 {
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addr = o.Addrs[0]
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}
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return &Options{
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Addr: addr,
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Dialer: o.Dialer,
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OnConnect: o.OnConnect,
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DB: o.DB,
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Username: o.Username,
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Password: o.Password,
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MaxRetries: o.MaxRetries,
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MinRetryBackoff: o.MinRetryBackoff,
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MaxRetryBackoff: o.MaxRetryBackoff,
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DialTimeout: o.DialTimeout,
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ReadTimeout: o.ReadTimeout,
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WriteTimeout: o.WriteTimeout,
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PoolSize: o.PoolSize,
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MinIdleConns: o.MinIdleConns,
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MaxConnAge: o.MaxConnAge,
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PoolTimeout: o.PoolTimeout,
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IdleTimeout: o.IdleTimeout,
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IdleCheckFrequency: o.IdleCheckFrequency,
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TLSConfig: o.TLSConfig,
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}
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}
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// --------------------------------------------------------------------
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// UniversalClient is an abstract client which - based on the provided options -
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// represents either a ClusterClient, a FailoverClient, or a single-node Client.
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// This can be useful for testing cluster-specific applications locally or having different
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// clients in different environments.
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type UniversalClient interface {
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Cmdable
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Context() context.Context
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AddHook(Hook)
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Watch(ctx context.Context, fn func(*Tx) error, keys ...string) error
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Do(ctx context.Context, args ...interface{}) *Cmd
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Process(ctx context.Context, cmd Cmder) error
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Subscribe(ctx context.Context, channels ...string) *PubSub
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PSubscribe(ctx context.Context, channels ...string) *PubSub
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Close() error
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PoolStats() *PoolStats
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}
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var (
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_ UniversalClient = (*Client)(nil)
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_ UniversalClient = (*ClusterClient)(nil)
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_ UniversalClient = (*Ring)(nil)
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)
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// NewUniversalClient returns a new multi client. The type of the returned client depends
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// on the following conditions:
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//
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// 1. If the MasterName option is specified, a sentinel-backed FailoverClient is returned.
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// 2. if the number of Addrs is two or more, a ClusterClient is returned.
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// 3. Otherwise, a single-node Client is returned.
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func NewUniversalClient(opts *UniversalOptions) UniversalClient {
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if opts.MasterName != "" {
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return NewFailoverClient(opts.Failover())
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} else if len(opts.Addrs) > 1 {
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return NewClusterClient(opts.Cluster())
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}
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return NewClient(opts.Simple())
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}
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