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alter_config_request.go
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/
alter_config_request.go
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package healer
import (
"encoding/binary"
"fmt"
)
// AlterConfigsRequest struct holds params in AlterConfigsRequest
type AlterConfigsRequest struct {
*RequestHeader
Resources []AlterConfigsRequestResource
validateOnly bool
}
// AlterConfigsRequestResource is sub struct in AlterConfigsRequest
type AlterConfigsRequestResource struct {
ResourceType uint8
ResourceName string
ConfigEntries []AlterConfigsRequestConfigEntry
}
func (r AlterConfigsRequestResource) encode(payload []byte) (offset int) {
payload[0] = r.ResourceType
offset++
binary.BigEndian.PutUint16(payload[offset:], uint16(len(r.ResourceName)))
offset += 2
offset += copy(payload[offset:], r.ResourceName)
binary.BigEndian.PutUint32(payload[offset:], uint32(len(r.ConfigEntries)))
offset += 4
for _, c := range r.ConfigEntries {
offset += c.encode(payload[offset:])
}
return
}
// AlterConfigsRequestConfigEntry is sub struct in AlterConfigsRequestResource
type AlterConfigsRequestConfigEntry struct {
ConfigName string
ConfigValue string
}
func (c AlterConfigsRequestConfigEntry) encode(payload []byte) (offset int) {
binary.BigEndian.PutUint16(payload[offset:], uint16(len(c.ConfigName)))
offset += 2
offset += copy(payload[offset:], c.ConfigName)
binary.BigEndian.PutUint16(payload[offset:], uint16(len(c.ConfigValue)))
offset += 2
offset += copy(payload[offset:], c.ConfigValue)
return
}
// NewAlterConfigsRequest create a new AlterConfigsRequest
func NewAlterConfigsRequest(clientID string) AlterConfigsRequest {
requestHeader := &RequestHeader{
APIKey: API_AlterConfigs,
ClientID: clientID,
}
return AlterConfigsRequest{requestHeader, nil, false}
}
// SetValidateOnly set validateOnly in request
func (r *AlterConfigsRequest) SetValidateOnly(validateOnly bool) *AlterConfigsRequest {
r.validateOnly = validateOnly
return r
}
// AddConfig add new config entry to request
func (r *AlterConfigsRequest) AddConfig(resourceType uint8, resourceName, configName, configValue string) error {
for i, res := range r.Resources {
if res.ResourceType == resourceType && res.ResourceName == resourceName {
for _, c := range res.ConfigEntries {
if c.ConfigName == configName {
if c.ConfigValue != configValue {
return fmt.Errorf("config %s already exist with different value", configName)
}
return nil
}
}
e := AlterConfigsRequestConfigEntry{
ConfigName: configName,
ConfigValue: configValue,
}
res.ConfigEntries = append(res.ConfigEntries, e)
r.Resources[i] = res
return nil
}
}
r.Resources = append(r.Resources, AlterConfigsRequestResource{
ResourceType: resourceType,
ResourceName: resourceName,
ConfigEntries: []AlterConfigsRequestConfigEntry{
{
ConfigName: configName,
ConfigValue: configValue,
},
},
})
return nil
}
func (r *AlterConfigsRequest) length() int {
l := r.RequestHeader.length()
l += 4
for _, resource := range r.Resources {
l++
l += 2 + len(resource.ResourceName)
l += 4
for _, configEntry := range resource.ConfigEntries {
l += 2 + len(configEntry.ConfigName)
l += 2 + len(configEntry.ConfigValue)
}
}
l++
return l
}
// Encode encodes AlterConfigsRequest object to []byte. it implement Request Interface
func (r AlterConfigsRequest) Encode(version uint16) []byte {
requestLength := r.length()
payload := make([]byte, requestLength+4)
offset := 0
binary.BigEndian.PutUint32(payload[offset:], uint32(requestLength))
offset += 4
offset += r.RequestHeader.Encode(payload[offset:])
binary.BigEndian.PutUint32(payload[offset:], uint32(len(r.Resources)))
offset += 4
for _, r := range r.Resources {
offset += r.encode(payload[offset:])
}
if r.validateOnly {
payload[offset] = 1
} else {
payload[offset] = 0
}
return payload
}