dialoptions.go

/*
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package brpc

import "time"

// dialOptions configure a Dial call. dailOptions are set by the DialOption
// values passed to Dial.
type dialOptions struct {
	timeout     time.Duration
	callOptions []CallOption
}

func defaultDialOptions() dialOptions {
	return dialOptions{
		timeout: 200 * time.Millisecond,
	}
}

// DialOption configure how we set up the connection.
type DialOption interface {
	apply(*dialOptions)
}

// funcDialOption wraps a function that modifies dialOptions into an
// implementation of the DialOption interface.
type funcDialOption struct {
	f func(*dialOptions)
}

func (fdo *funcDialOption) apply(do *dialOptions) {
	fdo.f(do)
}

func newFuncDialOption(f func(*dialOptions)) *funcDialOption {
	return &funcDialOption{
		f: f,
	}
}

// WithDefaultCallOptions returns a DialOption which sets the default
// CallOptions for calls over the connection.
func WithDefaultCallOptions(cos ...CallOption) DialOption {
	return newFuncDialOption(func(o *dialOptions) {
		o.callOptions = append(o.callOptions, cos...)
	})
}