micro-client-grpc/options.go

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// Package grpc provides a gRPC options
package grpc
import (
"context"
"go.unistack.org/micro/v3/client"
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"google.golang.org/grpc"
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"google.golang.org/grpc/encoding"
)
var (
// DefaultPoolMaxStreams maximum streams on a connectioin
// (20)
DefaultPoolMaxStreams = 20
// DefaultPoolMaxIdle maximum idle conns of a pool
// (50)
DefaultPoolMaxIdle = 50
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// DefaultMaxRecvMsgSize maximum message that client can receive
// (4 MB).
DefaultMaxRecvMsgSize = 1024 * 1024 * 4
// DefaultMaxSendMsgSize maximum message that client can send
// (4 MB).
DefaultMaxSendMsgSize = 1024 * 1024 * 4
)
type poolMaxStreams struct{}
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// maximum streams on a connectioin
func PoolMaxStreams(n int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, poolMaxStreams{}, n)
}
}
type poolMaxIdle struct{}
// maximum idle conns of a pool
func PoolMaxIdle(d int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, poolMaxIdle{}, d)
}
}
type codecsKey struct{}
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// gRPC Codec to be used to encode/decode requests for a given content type
func Codec(contentType string, c encoding.Codec) client.Option {
return func(o *client.Options) {
codecs := make(map[string]encoding.Codec)
if o.Context == nil {
o.Context = context.Background()
}
if v := o.Context.Value(codecsKey{}); v != nil {
codecs = v.(map[string]encoding.Codec)
}
codecs[contentType] = c
o.Context = context.WithValue(o.Context, codecsKey{}, codecs)
}
}
type maxRecvMsgSizeKey struct{}
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// MaxRecvMsgSize set the maximum size of message that client can receive.
func MaxRecvMsgSize(s int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, maxRecvMsgSizeKey{}, s)
}
}
type maxSendMsgSizeKey struct{}
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// MaxSendMsgSize set the maximum size of message that client can send.
func MaxSendMsgSize(s int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, maxSendMsgSizeKey{}, s)
}
}
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type grpcDialOptions struct{}
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// DialOptions to be used to configure gRPC dial options
func DialOptions(opts ...grpc.DialOption) client.Option {
return func(o *client.Options) {
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if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, grpcDialOptions{}, opts)
}
}
type grpcCallOptions struct{}
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// CallOptions to be used to configure gRPC call options
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func CallOptions(opts ...grpc.CallOption) client.CallOption {
return func(o *client.CallOptions) {
if o.Context == nil {
o.Context = context.Background()
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}
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o.Context = context.WithValue(o.Context, grpcCallOptions{}, opts)
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}
}