baseserver

package
v0.0.0-...-f33e45f Latest Latest
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 Go to latest Published: Nov 20, 2020 License: Apache-2.0 Imports: 40 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	FAILURE_CODE   = -10
	ENV_CH_NUM_CPU = "CH_NUM_CPU"
)
View Source 
const (
	MS_LOG_PREFIX = "baseserver.metaserver "
)

Variables

View Source 
var BaseServerConfigurationDefaults = BaseServerConfiguration{
	LogToStdout:             true,
	LogLevel:                "debug",
	MetricsDestination:      "syslog",
	MetaListen:              "localhost:0",
	LegacyHealthCheckListen: "",
	ShutdownSettleTime:      1 * time.Second,
	HealthCheckStartupDelay: 5 * time.Second,
	HealthCheckPeriod:       30 * time.Second,
	HealthCheckTimeout:      5 * time.Second,
	PropsRefreshPeriod:      5 * time.Minute,
	OllyDataset:             "",
	OllyWriteKey:            "",
}
View Source 
var ENV_BLACKLIST = []string{
	"connection_string",
	"secret",
	"password",
	"token",
	"credential",
	"pg_connection",
	"pg_write_connection",
	"mailer",
	"alert_connection",
}

All lowercase here please

Functions

func GetGlobalFeatureService 

func GetGlobalFeatureService() features.FeatureService

GetGlobalFeatureService looks up the feature service on globalBaseServer. If it doesn't exist (i.e. during tests), that's ok, give us an empty one.

func GetGlobalPropertyService 

func GetGlobalPropertyService() properties.PropertyService

GetGlobalPropertyService looks up the property service on globalBaseServer. If it doesn't exist (i.e. during tests), that's ok, give us an empty one.

func InitGlobalBaseServerTestingOnly 

func InitGlobalBaseServerTestingOnly(propertyMap map[string]string, defaultPropertyBacking properties.PropertyBacking)

InitGlobalBaseServerTestingOnly is for tests to create a BaseServer and play with its PropertyService and FeatureService.

func ResetGlobalBaseServerTestingOnly 

func ResetGlobalBaseServerTestingOnly()

ResetGlobalBaseServerTestingOnly should be defered after a call to InitGlobalBaseServerTestingOnly.

Types

type BaseServer 

type BaseServer struct {
	*BaseServerConfiguration

	Logger *logger.Logger
	// contains filtered or unexported fields
}

func Boilerplate 

func Boilerplate(serviceName string, versionInfo version.VersionInfo, defaultPropertyBacking properties.PropertyBacking) *BaseServer

Perform baseserver initialization steps -- hopefully 9 out of 10 services can just call this and Run()

func BoilerplateWithPrefix 

func BoilerplateWithPrefix(serviceName string, versionInfo version.VersionInfo, metricsPrefix string, defaultPropertyBacking properties.PropertyBacking) *BaseServer

For when you need to set metrics prefix.

func GetGlobalBaseServer 

func GetGlobalBaseServer() *BaseServer

func NewBaseServer 

func NewBaseServer(serviceName string, version version.VersionInfo, metricsPrefix string, defaultPropertyBacking properties.PropertyBacking) *BaseServer

func (*BaseServer) Fail 

func (bs *BaseServer) Fail(msg string)

func (*BaseServer) FinishLogger 

func (bs *BaseServer) FinishLogger()

func (*BaseServer) FinishOlly 

func (bs *BaseServer) FinishOlly()

func (*BaseServer) GetFeatureService 

func (bs *BaseServer) GetFeatureService() features.FeatureService

func (*BaseServer) GetHealthCheckHandler 

func (bs *BaseServer) GetHealthCheckHandler() func(w http.ResponseWriter, r *http.Request)

func (*BaseServer) GetPropertyService 

func (bs *BaseServer) GetPropertyService() properties.PropertyService

func (*BaseServer) Init 

func (bs *BaseServer) Init()

Perform some early initialization steps -- things it makes sense to do before callers start building/initializing anything from the actual service. Most things should probably be started from Run(). Called by Boilerplate().

func (*BaseServer) InitLogger 

func (bs *BaseServer) InitLogger(stdout bool, loglevel string)

Initialize logging.

func (*BaseServer) InitMaxProcs 

func (bs *BaseServer) InitMaxProcs()

Set the number of cpus this process can use.

func (*BaseServer) InitMetrics 

func (bs *BaseServer) InitMetrics()

Initialize metrics.

func (*BaseServer) InitOlly 

func (bs *BaseServer) InitOlly()

Initialize olly observability.

func (*BaseServer) OllyBuilder 

func (bs *BaseServer) OllyBuilder() *olly.Builder

func (*BaseServer) ParseFlags 

func (bs *BaseServer) ParseFlags()

Parse standard golang command line flags (both those defined by the service and baseserver). Exits if the resulting configuration is broken or eg. if -v is specified

func (*BaseServer) Run 

func (bs *BaseServer) Run(service Service)

Finish initializing and run until signaled otherwise. Spawns sub routines.

func (*BaseServer) Shutdown 

func (bs *BaseServer) Shutdown(reason string)

func (*BaseServer) WaitUntilReady 

func (bs *BaseServer) WaitUntilReady(timeout time.Duration)

type BaseServerConfiguration 

type BaseServerConfiguration struct {
	// base service properties
	ServiceName string
	VersionInfo version.VersionInfo

	// operational
	ShutdownSettleTime time.Duration

	// logging
	LogToStdout bool
	LogLevel    string
	LogPrefix   string

	// metrics
	MetricsPrefix      string
	MetricsDestination string

	// olly
	OllyWriteKey string
	OllyDataset  string

	// meta server properties
	MetaListen string

	// healthchecks
	HealthCheckStartupDelay time.Duration
	HealthCheckPeriod       time.Duration
	HealthCheckTimeout      time.Duration

	// legacy healthcheck
	LegacyHealthCheckListen string

	// for tests
	SkipParseFlags bool

	// props
	PropsRefreshPeriod time.Duration

	// Skip env dump
	SkipEnvDump bool
}

type HealthCheckExecutor 

type HealthCheckExecutor struct {
	// contains filtered or unexported fields
}

func NewHealthCheckExecutor 

func NewHealthCheckExecutor(service Service, startupDelay time.Duration, period time.Duration, timeout time.Duration) *HealthCheckExecutor

func (*HealthCheckExecutor) GetResult 

func (hce *HealthCheckExecutor) GetResult() *HealthCheckResult

func (*HealthCheckExecutor) Run 

func (hce *HealthCheckExecutor) Run(ctx context.Context)

type HealthCheckResult 

type HealthCheckResult struct {
	Stamp   time.Time `json:"stamp"`
	Success bool      `json:"success"`
	Error   string    `json:"error"`
}

func (*HealthCheckResult) Fail 

func (hcr *HealthCheckResult) Fail(message string)

Fail this healthcheck execution with the given message and panics.

func (*HealthCheckResult) FailOnError 

func (hcr *HealthCheckResult) FailOnError(description string, err error)

Fail this healthcheck execution and panics if err is not nil.

func (*HealthCheckResult) FailOnSqlDbError 

func (hcr *HealthCheckResult) FailOnSqlDbError(ctx context.Context, description string, db *sql.DB)

Fail this healthcheck execution and panics if the given sql.DB is dead

type MetaServer 

type MetaServer struct {
	// contains filtered or unexported fields
}

func NewMetaServer 

func NewMetaServer(listen string, serviceName string, version version.VersionInfo, service Service, log *logger.Logger, initialLogLevel logger.Level, hce *HealthCheckExecutor) *MetaServer

func (*MetaServer) Run 

func (ms *MetaServer) Run(ctx context.Context) error

type Service 

type Service interface {
	// Run this service until the given context is closed, after which the service cannot be re-started. Blocks.
	Run(ctx context.Context) error

	GetStatus() []byte                                             // for legacy healthcheck
	RunHealthCheck(ctx context.Context, result *HealthCheckResult) // new style healthcheck

	Close() // deprecated; select fron ctx.Done() in Run() instead

	HttpInfo(w http.ResponseWriter, req *http.Request) // Hook to provide http info via metaserver
}

Service interface - baseserver/metaserver use these methods to interact with actual services

Source Files

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