github.com/kaydxh/golang@v0.0.131/pkg/resolver/config.go (about)

     1  /*
     2   *Copyright (c) 2022, kaydxh
     3   *
     4   *Permission is hereby granted, free of charge, to any person obtaining a copy
     5   *of this software and associated documentation files (the "Software"), to deal
     6   *in the Software without restriction, including without limitation the rights
     7   *to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     8   *copies of the Software, and to permit persons to whom the Software is
     9   *furnished to do so, subject to the following conditions:
    10   *
    11   *The above copyright notice and this permission notice shall be included in all
    12   *copies or substantial portions of the Software.
    13   *
    14   *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    15   *IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    16   *FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    17   *AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    18   *LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    19   *OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    20   *SOFTWARE.
    21   */
    22  package resolver
    23  
    24  import (
    25  	"context"
    26  
    27  	viper_ "github.com/kaydxh/golang/pkg/viper"
    28  	"github.com/sirupsen/logrus"
    29  	"github.com/spf13/viper"
    30  )
    31  
    32  type Config struct {
    33  	Proto Resolver
    34  	opts  struct {
    35  		// If set, overrides params below
    36  		viper *viper.Viper
    37  	}
    38  }
    39  
    40  type completedConfig struct {
    41  	*Config
    42  	completeError error
    43  }
    44  
    45  type CompletedConfig struct {
    46  	// Embed a private pointer that cannot be instantiated outside of this package.
    47  	*completedConfig
    48  }
    49  
    50  func (c *completedConfig) New(ctx context.Context, opts ...ResolverQueryOption) (*ResolverService, error) {
    51  
    52  	logrus.Infof("Installing Resolver")
    53  
    54  	if c.completeError != nil {
    55  		return nil, c.completeError
    56  	}
    57  
    58  	if !c.Proto.GetEnabled() {
    59  		return nil, nil
    60  	}
    61  
    62  	rs, err := c.install(ctx, opts...)
    63  	if err != nil {
    64  		return nil, err
    65  	}
    66  	logrus.Infof("Installed Resolver")
    67  
    68  	return rs, nil
    69  }
    70  
    71  func (c *completedConfig) install(ctx context.Context, opts ...ResolverQueryOption) (*ResolverService, error) {
    72  	resolverInterval := c.Proto.GetResolveInterval().AsDuration()
    73  	rs := NewResolverService(resolverInterval)
    74  
    75  	var (
    76  		rOpts       []ResolverQueryOption
    77  		serverNames []string
    78  	)
    79  
    80  	rOpts = append(rOpts,
    81  		WithResolverType(c.Proto.GetResolverType()),
    82  		WithLoadBalanceMode(c.Proto.GetLoadBalanceMode()),
    83  	)
    84  
    85  	if c.Proto.ResolverType == Resolver_resolver_type_k8s {
    86  		rOpts = append(rOpts,
    87  			WithNodeGroup(c.Proto.GetK8S().GetNodeGroup()),
    88  			WithNodeUnit(c.Proto.GetK8S().GetNodeUnit()),
    89  		)
    90  		rOpts = append(rOpts, opts...)
    91  
    92  		serverNames = c.Proto.GetK8S().GetServiceNames()
    93  
    94  	} else {
    95  
    96  		rOpts = append(rOpts, opts...)
    97  		serverNames = c.Proto.GetDomains()
    98  
    99  	}
   100  
   101  	for _, domain := range serverNames {
   102  		rq, err := NewResolverQuery(
   103  			domain,
   104  			rOpts...,
   105  		)
   106  		if err != nil {
   107  			return nil, err
   108  		}
   109  		rs.AddService(rq)
   110  	}
   111  
   112  	return rs, nil
   113  }
   114  
   115  // Complete set default ServerRunOptions.
   116  func (c *Config) Complete() CompletedConfig {
   117  	err := c.loadViper()
   118  	if err != nil {
   119  		return CompletedConfig{&completedConfig{
   120  			Config:        c,
   121  			completeError: err,
   122  		}}
   123  	}
   124  
   125  	return CompletedConfig{&completedConfig{Config: c}}
   126  }
   127  
   128  func (c *Config) loadViper() error {
   129  	if c.opts.viper != nil {
   130  		return viper_.UnmarshalProtoMessageWithJsonPb(c.opts.viper, &c.Proto)
   131  	}
   132  
   133  	return nil
   134  }
   135  
   136  func NewConfig(options ...ConfigOption) *Config {
   137  	c := &Config{}
   138  	c.ApplyOptions(options...)
   139  
   140  	return c
   141  }