/
common.go
132 lines (112 loc) · 4.75 KB
/
common.go
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// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package placement
import (
"net/http"
"strings"
"github.com/m3db/m3/src/cmd/services/m3query/config"
"github.com/m3db/m3/src/query/util/logging"
clusterclient "github.com/m3db/m3cluster/client"
"github.com/m3db/m3cluster/generated/proto/placementpb"
"github.com/m3db/m3cluster/placement"
"github.com/m3db/m3cluster/services"
"github.com/m3db/m3cluster/shard"
"github.com/gorilla/mux"
)
const (
// DefaultServiceName is the default service ID name
DefaultServiceName = "m3db"
// DefaultServiceEnvironment is the default service ID environment
DefaultServiceEnvironment = "default_env"
// DefaultServiceZone is the default service ID zone
DefaultServiceZone = "embedded"
// HeaderClusterServiceName is the header used to specify the service name.
HeaderClusterServiceName = "Cluster-Service-Name"
// HeaderClusterEnvironmentName is the header used to specify the environment name.
HeaderClusterEnvironmentName = "Cluster-Environment-Name"
// HeaderClusterZoneName is the header used to specify the zone name.
HeaderClusterZoneName = "Cluster-Zone-Name"
)
// Handler represents a generic handler for placement endpoints.
type Handler struct {
// This is used by other placement Handlers
// nolint: structcheck
client clusterclient.Client
cfg config.Configuration
}
// Service gets a placement service from m3cluster client
func Service(clusterClient clusterclient.Client, headers http.Header) (placement.Service, error) {
cs, err := clusterClient.Services(services.NewOverrideOptions())
if err != nil {
return nil, err
}
serviceName := DefaultServiceName
if v := strings.TrimSpace(headers.Get(HeaderClusterServiceName)); v != "" {
serviceName = v
}
serviceEnvironment := DefaultServiceEnvironment
if v := strings.TrimSpace(headers.Get(HeaderClusterEnvironmentName)); v != "" {
serviceEnvironment = v
}
serviceZone := DefaultServiceZone
if v := strings.TrimSpace(headers.Get(HeaderClusterZoneName)); v != "" {
serviceZone = v
}
sid := services.NewServiceID().
SetName(serviceName).
SetEnvironment(serviceEnvironment).
SetZone(serviceZone)
ps, err := cs.PlacementService(sid, placement.NewOptions().SetValidZone(serviceZone))
if err != nil {
return nil, err
}
return ps, nil
}
// ConvertInstancesProto converts a slice of protobuf `Instance`s to `placement.Instance`s
func ConvertInstancesProto(instancesProto []*placementpb.Instance) ([]placement.Instance, error) {
res := make([]placement.Instance, 0, len(instancesProto))
for _, instanceProto := range instancesProto {
shards, err := shard.NewShardsFromProto(instanceProto.Shards)
if err != nil {
return nil, err
}
instance := placement.NewInstance().
SetEndpoint(instanceProto.Endpoint).
SetHostname(instanceProto.Hostname).
SetID(instanceProto.Id).
SetPort(instanceProto.Port).
SetIsolationGroup(instanceProto.IsolationGroup).
SetShards(shards).
SetShardSetID(instanceProto.ShardSetId).
SetWeight(instanceProto.Weight).
SetZone(instanceProto.Zone)
res = append(res, instance)
}
return res, nil
}
// RegisterRoutes registers the placement routes
func RegisterRoutes(r *mux.Router, client clusterclient.Client, cfg config.Configuration) {
logged := logging.WithResponseTimeLogging
r.HandleFunc(InitURL, logged(NewInitHandler(client, cfg)).ServeHTTP).Methods(InitHTTPMethod)
r.HandleFunc(GetURL, logged(NewGetHandler(client, cfg)).ServeHTTP).Methods(GetHTTPMethod)
r.HandleFunc(DeleteAllURL, logged(NewDeleteAllHandler(client, cfg)).ServeHTTP).Methods(DeleteAllHTTPMethod)
r.HandleFunc(AddURL, logged(NewAddHandler(client, cfg)).ServeHTTP).Methods(AddHTTPMethod)
r.HandleFunc(DeleteURL, logged(NewDeleteHandler(client, cfg)).ServeHTTP).Methods(DeleteHTTPMethod)
}