micro/client/options.go

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package client
import (
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"context"
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"time"
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"github.com/micro/go-micro/broker"
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"github.com/micro/go-micro/client/selector"
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"github.com/micro/go-micro/codec"
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"github.com/micro/go-micro/registry"
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"github.com/micro/go-micro/transport"
)
type Options struct {
// Used to select codec
ContentType string
// Plugged interfaces
Broker broker.Broker
Codecs map[string]codec.NewCodec
Registry registry.Registry
Selector selector.Selector
Transport transport.Transport
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// Router sets the router
Router Router
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// Connection Pool
PoolSize int
PoolTTL time.Duration
// Middleware for client
Wrappers []Wrapper
// Default Call Options
CallOptions CallOptions
// Other options for implementations of the interface
// can be stored in a context
Context context.Context
}
type CallOptions struct {
SelectOptions []selector.SelectOption
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// Address of remote hosts
Address []string
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// Backoff func
Backoff BackoffFunc
// Check if retriable func
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Retry RetryFunc
// Transport Dial Timeout
DialTimeout time.Duration
// Number of Call attempts
Retries int
// Request/Response timeout
RequestTimeout time.Duration
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// Middleware for low level call func
CallWrappers []CallWrapper
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// Other options for implementations of the interface
// can be stored in a context
Context context.Context
}
type PublishOptions struct {
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// Exchange is the routing exchange for the message
Exchange string
// Other options for implementations of the interface
// can be stored in a context
Context context.Context
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}
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type MessageOptions struct {
ContentType string
}
type RequestOptions struct {
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ContentType string
Stream bool
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// Other options for implementations of the interface
// can be stored in a context
Context context.Context
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}
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func newOptions(options ...Option) Options {
opts := Options{
Codecs: make(map[string]codec.NewCodec),
CallOptions: CallOptions{
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Backoff: DefaultBackoff,
Retry: DefaultRetry,
Retries: DefaultRetries,
RequestTimeout: DefaultRequestTimeout,
DialTimeout: transport.DefaultDialTimeout,
},
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PoolSize: DefaultPoolSize,
PoolTTL: DefaultPoolTTL,
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}
for _, o := range options {
o(&opts)
}
if len(opts.ContentType) == 0 {
opts.ContentType = DefaultContentType
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}
if opts.Broker == nil {
opts.Broker = broker.DefaultBroker
}
if opts.Registry == nil {
opts.Registry = registry.DefaultRegistry
}
if opts.Selector == nil {
opts.Selector = selector.NewSelector(
selector.Registry(opts.Registry),
)
}
if opts.Transport == nil {
opts.Transport = transport.DefaultTransport
}
if opts.Context == nil {
opts.Context = context.Background()
}
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return opts
}
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// Broker to be used for pub/sub
func Broker(b broker.Broker) Option {
return func(o *Options) {
o.Broker = b
}
}
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// Codec to be used to encode/decode requests for a given content type
func Codec(contentType string, c codec.NewCodec) Option {
return func(o *Options) {
o.Codecs[contentType] = c
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}
}
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// Default content type of the client
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func ContentType(ct string) Option {
return func(o *Options) {
o.ContentType = ct
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}
}
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// PoolSize sets the connection pool size
func PoolSize(d int) Option {
return func(o *Options) {
o.PoolSize = d
}
}
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// PoolTTL sets the connection pool ttl
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func PoolTTL(d time.Duration) Option {
return func(o *Options) {
o.PoolTTL = d
}
}
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// Registry to find nodes for a given service
func Registry(r registry.Registry) Option {
return func(o *Options) {
o.Registry = r
}
}
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// Transport to use for communication e.g http, rabbitmq, etc
func Transport(t transport.Transport) Option {
return func(o *Options) {
o.Transport = t
}
}
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// Select is used to select a node to route a request to
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func Selector(s selector.Selector) Option {
return func(o *Options) {
o.Selector = s
}
}
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// Adds a Wrapper to a list of options passed into the client
func Wrap(w Wrapper) Option {
return func(o *Options) {
o.Wrappers = append(o.Wrappers, w)
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}
}
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// Adds a Wrapper to the list of CallFunc wrappers
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func WrapCall(cw ...CallWrapper) Option {
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return func(o *Options) {
o.CallOptions.CallWrappers = append(o.CallOptions.CallWrappers, cw...)
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}
}
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// Backoff is used to set the backoff function used
// when retrying Calls
func Backoff(fn BackoffFunc) Option {
return func(o *Options) {
o.CallOptions.Backoff = fn
}
}
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// Number of retries when making the request.
// Should this be a Call Option?
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func Retries(i int) Option {
return func(o *Options) {
o.CallOptions.Retries = i
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}
}
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// Retry sets the retry function to be used when re-trying.
func Retry(fn RetryFunc) Option {
return func(o *Options) {
o.CallOptions.Retry = fn
}
}
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// The request timeout.
// Should this be a Call Option?
func RequestTimeout(d time.Duration) Option {
return func(o *Options) {
o.CallOptions.RequestTimeout = d
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}
}
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// Transport dial timeout
func DialTimeout(d time.Duration) Option {
return func(o *Options) {
o.CallOptions.DialTimeout = d
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}
}
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// Call Options
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// WithExchange sets the exchange to route a message through
func WithExchange(e string) PublishOption {
return func(o *PublishOptions) {
o.Exchange = e
}
}
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// WithAddress sets the remote addresses to use rather than using service discovery
func WithAddress(a ...string) CallOption {
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return func(o *CallOptions) {
o.Address = a
}
}
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func WithSelectOption(so ...selector.SelectOption) CallOption {
return func(o *CallOptions) {
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o.SelectOptions = append(o.SelectOptions, so...)
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}
}
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// WithCallWrapper is a CallOption which adds to the existing CallFunc wrappers
func WithCallWrapper(cw ...CallWrapper) CallOption {
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return func(o *CallOptions) {
o.CallWrappers = append(o.CallWrappers, cw...)
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}
}
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// WithBackoff is a CallOption which overrides that which
// set in Options.CallOptions
func WithBackoff(fn BackoffFunc) CallOption {
return func(o *CallOptions) {
o.Backoff = fn
}
}
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// WithRetry is a CallOption which overrides that which
// set in Options.CallOptions
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func WithRetry(fn RetryFunc) CallOption {
return func(o *CallOptions) {
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o.Retry = fn
}
}
// WithRetries is a CallOption which overrides that which
// set in Options.CallOptions
func WithRetries(i int) CallOption {
return func(o *CallOptions) {
o.Retries = i
}
}
// WithRequestTimeout is a CallOption which overrides that which
// set in Options.CallOptions
func WithRequestTimeout(d time.Duration) CallOption {
return func(o *CallOptions) {
o.RequestTimeout = d
}
}
// WithDialTimeout is a CallOption which overrides that which
// set in Options.CallOptions
func WithDialTimeout(d time.Duration) CallOption {
return func(o *CallOptions) {
o.DialTimeout = d
}
}
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// Request Options
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func WithContentType(ct string) RequestOption {
return func(o *RequestOptions) {
o.ContentType = ct
}
}
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func StreamingRequest() RequestOption {
return func(o *RequestOptions) {
o.Stream = true
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}
}
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// WithRouter sets the client router
func WithRouter(r Router) Option {
return func(o *Options) {
o.Router = r
}
}