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common.go
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common.go
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// Copyright 2014 The Serviced Authors.
// 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 domain
import (
"encoding/json"
"fmt"
"time"
)
type MinMax struct {
Min int
Max int
Default int
}
type HostIPAndPort struct {
HostIP string
HostPort string
}
//Validate ensure that the values in min max are valid. Max >= Min >=0 returns error otherwise
func (minmax *MinMax) Validate() error {
// Instances["min"] and Instances["max"] must be positive
if minmax.Min < 0 || minmax.Max < 0 {
return fmt.Errorf("Instances constraints must be positive: Min=%v; Max=%v", minmax.Min, minmax.Max)
}
// If "min" and "max" are both declared Instances["min"] < Instances["max"]
if minmax.Max != 0 && minmax.Min > minmax.Max {
return fmt.Errorf("Minimum instances larger than maximum instances: Min=%v; Max=%v", minmax.Min, minmax.Max)
}
// "Default" should be between min + max, inclusive if max is nonzero and default is set
if minmax.Default != 0 {
if minmax.Max != 0 {
if minmax.Default < minmax.Min || minmax.Default > minmax.Max {
return fmt.Errorf("Default instance spec must be between min and max, inclusive: Min=%v; Max=%v; Default=%v", minmax.Min, minmax.Max, minmax.Default)
}
} else {
if minmax.Default < minmax.Min {
return fmt.Errorf("Default instance spec cannot be less than the minimum: Min=%v; Max=%v; Default=%v", minmax.Min, minmax.Max, minmax.Default)
}
}
}
return nil
}
// HealthCheck is a health check object
type HealthCheck struct {
Script string // A script to execute to verify the health of a service.
Interval time.Duration // The interval at which to execute the script.
Timeout time.Duration // A timeout in which to complete the health check.
}
type jsonHealthCheck struct {
Script string
Interval float64 // the serialzed version will be in seconds
Timeout float64
}
func (hc HealthCheck) MarshalJSON() ([]byte, error) {
// in json, the interval is represented in seconds
interval := float64(hc.Interval) / 1000000000.0
timeout := float64(hc.Timeout) / 1000000000.0
return json.Marshal(jsonHealthCheck{
Script: hc.Script,
Interval: interval,
Timeout: timeout,
})
}
func (hc *HealthCheck) UnmarshalJSON(data []byte) error {
var tempHc jsonHealthCheck
if err := json.Unmarshal(data, &tempHc); err != nil {
return err
}
hc.Script = tempHc.Script
// interval in js is in seconds, convert to nanoseconds, then duration
hc.Interval = time.Duration(tempHc.Interval * 1000000000.0)
hc.Timeout = time.Duration(tempHc.Timeout * 1000000000.0)
return nil
}
type HealthCheckResult struct {
ServiceID string
InstanceID string
Name string
Timestamp string
Passed string
}
type Prereq struct {
Name string
Script string
}
func (h *HealthCheckResult) ValidEntity() error {
return nil
}