initial http support

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
This commit is contained in:
Василий Толстов 2024-11-16 23:57:58 +03:00
parent f7127198d6
commit 1bba83e6fc
7 changed files with 229 additions and 78 deletions

1
.gitignore vendored
View File

@ -24,3 +24,4 @@ go.work
config.yaml
servicechecker
*.protoset
authn.yaml

View File

@ -7,21 +7,27 @@ import (
"os/signal"
"time"
openapi_v3 "github.com/google/gnostic/openapiv3"
grpccli "go.unistack.org/micro-client-grpc/v3"
httpcli "go.unistack.org/micro-client-http/v3"
jsoncodec "go.unistack.org/micro-codec-json/v3"
jsonpbcodec "go.unistack.org/micro-codec-jsonpb/v3"
protocodec "go.unistack.org/micro-codec-proto/v3"
victoriametrics "go.unistack.org/micro-meter-victoriametrics/v3"
codecpb "go.unistack.org/micro-proto/v3/codec"
httpsrv "go.unistack.org/micro-server-http/v3"
healthhandler "go.unistack.org/micro-server-http/v3/handler/health"
meterhandler "go.unistack.org/micro-server-http/v3/handler/meter"
"go.unistack.org/micro/v3/client"
"go.unistack.org/micro/v3/codec"
"go.unistack.org/micro/v3/logger"
"go.unistack.org/micro/v3/logger/slog"
"go.unistack.org/micro/v3/meter"
"go.unistack.org/micro/v3/semconv"
"go.unistack.org/micro/v3/server"
"go.unistack.org/servicechecker/pkg/config"
"go.unistack.org/servicechecker/pkg/grpcconn"
"go.unistack.org/servicechecker/pkg/httpconn"
"go.unistack.org/servicechecker/pkg/scheduler"
"google.golang.org/protobuf/reflect/protodesc"
"google.golang.org/protobuf/reflect/protoreflect"
@ -29,6 +35,8 @@ import (
"google.golang.org/protobuf/types/dynamicpb"
)
var clients = make(map[string]client.Client)
func main() {
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, os.Kill)
defer stop()
@ -88,7 +96,6 @@ func main() {
l.Fatal(ctx, "failed to start http server", err)
}
clients := make(map[string]client.Client)
gcli := grpccli.NewClient(
client.Codec("application/json", jsonpbcodec.NewCodec()),
client.Codec("application/grpc", protocodec.NewCodec()),
@ -98,49 +105,163 @@ func main() {
client.Retries(0),
// client.TLSConfig(&tls.Config{InsecureSkipVerify: true}),
)
protosetBuf, _ := os.ReadFile("card.protoset")
if err = gcli.Init(); err != nil {
l.Fatal(ctx, "failed to init grpc client", err)
}
clients["grpc"] = gcli
hcli := httpcli.NewClient(
client.Codec("text/html", codec.NewCodec()),
client.Codec("text/plain", codec.NewCodec()),
client.Codec("application/json", jsonpbcodec.NewCodec()),
client.ContentType("application/json"),
client.Retries(0),
// client.TLSConfig(&tls.Config{InsecureSkipVerify: true}),
)
if err = hcli.Init(); err != nil {
l.Fatal(ctx, "failed to init http client", err)
}
clients["http"] = hcli
for _, check := range cfg.Checks {
l.Info(ctx, fmt.Sprintf("check %#+v", check))
if !check.Active {
continue
}
for _, task := range check.Tasks {
l.Info(ctx, fmt.Sprintf("task %#+v", task))
if !task.Active {
continue
}
var fn any
var args []any
switch {
case task.GRPC != nil:
fn, args, err = newGRPCTask(ctx, l, m, check.Name, task)
case task.HTTP != nil:
fn, args, err = newHTTPTask(ctx, l, m, check.Name, task)
}
if err != nil {
l.Error(ctx, "failed to create task", err)
continue
}
l.Info(ctx, fmt.Sprintf("add new task %v", fn))
sch.NewJob(time.Duration(check.Interval), fn, args...)
}
}
<-ctx.Done()
l.Info(ctx, "exiting")
}
func newHTTPTask(ctx context.Context, l logger.Logger, m meter.Meter, check string, task *config.Task) (any, []any, error) {
var err error
openapiBuf, err := os.ReadFile(task.HTTP.OpenAPI)
if err != nil {
l.Error(ctx, "failed to unmarshal openapi file", err)
return nil, nil, err
}
doc, err := openapi_v3.ParseDocument(openapiBuf)
if err != nil {
l.Error(ctx, "failed to unmarshal openapi file", err)
return nil, nil, err
}
_ = doc
c, ok := clients["http"]
if !ok {
err = fmt.Errorf("unknown client http")
l.Error(ctx, "failed to get client", err)
return nil, nil, err
}
errmap := make(map[string]interface{}, 1)
errmap["default"] = &codecpb.Frame{}
opts := []client.CallOption{
httpcli.ErrorMap(errmap),
httpcli.Method(task.HTTP.Method),
httpcli.Path(task.HTTP.Endpoint),
// client.WithContentType("application/json"),
}
rsp := &codecpb.Frame{}
treq := c.NewRequest(task.Name, task.Name, &codecpb.Frame{Data: []byte(task.HTTP.Data)})
fn := func() {
labels := []string{"check", check, "task", task.Name, "service", task.Name, "endpoint", task.Name}
m.Counter(semconv.ClientRequestInflight, labels...).Inc()
ts := time.Now()
l.Info(ctx, fmt.Sprintf("try to call %s.%s via %s", task.Name, task.Name, task.HTTP.Addr))
err = httpconn.Call(ctx, l, c, task.HTTP.Addr, time.Duration(task.Timeout),
treq,
rsp,
opts...)
te := time.Since(ts)
m.Summary(semconv.ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
m.Histogram(semconv.ClientRequestDurationSeconds, labels...).Update(te.Seconds())
m.Counter(semconv.ClientRequestInflight, labels...).Dec()
if err != nil {
m.Counter(semconv.ClientRequestTotal, append(labels, "status", "failure")...).Inc()
} else {
m.Counter(semconv.ClientRequestTotal, append(labels, "status", "success")...).Inc()
}
}
return fn, nil, nil
}
func newGRPCTask(ctx context.Context, l logger.Logger, m meter.Meter, check string, task *config.Task) (any, []any, error) {
var err error
protosetBuf, err := os.ReadFile(task.GRPC.Protoset)
if err != nil {
l.Error(ctx, "failed to unmarshal protoset file", err)
return nil, nil, err
}
fdset := &descriptorpb.FileDescriptorSet{}
if err = protocodec.NewCodec().Unmarshal(protosetBuf, fdset); err != nil {
l.Fatal(ctx, "failed to unmarshal protoset file", err)
l.Error(ctx, "failed to unmarshal protoset file", err)
return nil, nil, err
}
pfileoptions := protodesc.FileOptions{AllowUnresolvable: true}
pfiles, err := pfileoptions.NewFiles(fdset)
if err != nil {
l.Fatal(ctx, "failed to use protoset file", err)
l.Error(ctx, "failed to use protoset file", err)
return nil, nil, err
}
gcli.Init()
clients["grpc"] = gcli
for _, check := range cfg.Checks {
l.Info(ctx, fmt.Sprintf("check %#+v", check))
for _, task := range check.Tasks {
l.Info(ctx, fmt.Sprintf("task %#+v", task))
if task.GRPC != nil {
c, ok := clients["grpc"]
if !ok {
l.Error(ctx, fmt.Sprintf("unknown client %s", "grpc"))
continue
err = fmt.Errorf("unknown client grpc")
l.Error(ctx, "failed to get client", err)
return nil, nil, err
}
pkg, svc, mth := grpcconn.ServiceMethod(task.GRPC.Endpoint)
pdesc, err := pfiles.FindDescriptorByName(protoreflect.FullName(pkg + "." + svc))
if err != nil {
l.Error(ctx, "failed to find service "+pkg+"."+svc)
continue
return nil, nil, err
}
sdesc, ok := pdesc.(protoreflect.ServiceDescriptor)
if !ok {
l.Error(ctx, "failed to find service "+pkg+"."+svc)
continue
err = fmt.Errorf("failed to find service " + pkg + "." + svc)
l.Error(ctx, "unable to find service in protoset", err)
return nil, nil, err
}
mdesc := sdesc.Methods().ByName(protoreflect.Name(mth))
if mdesc == nil {
l.Error(ctx, "failed to find method "+mth)
continue
err = fmt.Errorf("unknown method " + mth)
l.Error(ctx, "failed to find method", err)
return nil, nil, err
}
req := dynamicpb.NewMessageType(mdesc.Input()).New()
@ -148,13 +269,13 @@ func main() {
if err = jsonpbcodec.NewCodec().Unmarshal([]byte(task.GRPC.Data), req); err != nil {
l.Error(ctx, "failed to unmarshal", err)
continue
return nil, nil, err
}
treq := c.NewRequest(pkg, svc+"."+mth, req)
sch.NewJob(time.Duration(check.Interval), func() {
labels := []string{"check", check.Name, "task", task.Name, "service", svc, "endpoint", mth}
fn := func() {
labels := []string{"check", check, "task", task.Name, "service", svc, "endpoint", mth}
m.Counter(semconv.ClientRequestInflight, labels...).Inc()
ts := time.Now()
l.Info(ctx, fmt.Sprintf("try to call %s.%s via %s", svc, mth, task.GRPC.Addr))
@ -170,11 +291,7 @@ func main() {
} else {
m.Counter(semconv.ClientRequestTotal, append(labels, "status", "success")...).Inc()
}
})
}
}
}
<-ctx.Done()
l.Info(ctx, "exiting")
return fn, nil, nil
}

6
go.mod
View File

@ -4,26 +4,28 @@ go 1.23.3
require (
github.com/go-co-op/gocron/v2 v2.12.3
github.com/google/gnostic v0.7.0
github.com/google/uuid v1.6.0
go.unistack.org/micro-client-grpc/v3 v3.11.10
go.unistack.org/micro-client-http/v3 v3.9.14
go.unistack.org/micro-codec-json/v3 v3.10.1
go.unistack.org/micro-codec-jsonpb/v3 v3.10.3
go.unistack.org/micro-codec-proto/v3 v3.10.2
go.unistack.org/micro-codec-yaml/v3 v3.10.2
go.unistack.org/micro-meter-victoriametrics/v3 v3.8.9
go.unistack.org/micro-proto/v3 v3.4.1
go.unistack.org/micro-server-http/v3 v3.11.33
go.unistack.org/micro/v3 v3.10.100
google.golang.org/protobuf v1.35.2
)
require (
github.com/google/gnostic-models v0.6.9-0.20230804172637-c7be7c783f49 // indirect
github.com/jonboulle/clockwork v0.4.0 // indirect
github.com/robfig/cron/v3 v3.0.1 // indirect
github.com/valyala/fastrand v1.1.0 // indirect
github.com/valyala/histogram v1.2.0 // indirect
go.unistack.org/metrics v0.0.1 // indirect
go.unistack.org/micro-client-http/v3 v3.9.14 // indirect
go.unistack.org/micro-proto/v3 v3.4.1 // indirect
golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 // indirect
golang.org/x/net v0.30.0 // indirect
golang.org/x/sys v0.27.0 // indirect

15
go.sum
View File

@ -710,12 +710,18 @@ github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaS
github.com/golang/protobuf v1.5.1/go.mod h1:DopwsBzvsk0Fs44TXzsVbJyPhcCPeIwnvohx4u74HPM=
github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/golang/snappy v0.0.3/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
github.com/google/flatbuffers v2.0.8+incompatible/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8=
github.com/google/gnostic v0.6.9/go.mod h1:Nm8234We1lq6iB9OmlgNv3nH91XLLVZHCDayfA3xq+E=
github.com/google/gnostic v0.7.0 h1:d7EpuFp8vVdML+y0JJJYiKeOLjKTdH/GvVkLOBWqJpw=
github.com/google/gnostic v0.7.0/go.mod h1:IAcUyMl6vtC95f60EZ8oXyqTsOersP6HbwjeG7EyDPM=
github.com/google/gnostic-models v0.6.9-0.20230804172637-c7be7c783f49 h1:0VpGH+cDhbDtdcweoyCVsF3fhN8kejK6rFe/2FFX2nU=
github.com/google/gnostic-models v0.6.9-0.20230804172637-c7be7c783f49/go.mod h1:BkkQ4L1KS1xMt2aWSPStnn55ChGC0DPOn2FQYj+f25M=
github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
@ -892,8 +898,6 @@ go.unistack.org/metrics v0.0.1 h1:sCnGO059ZccGC/D34iRH121eSk+7ci5+OY9cl5K7GKY=
go.unistack.org/metrics v0.0.1/go.mod h1:1FY4R7EKJa9Oz2D6wlGScNerpl6igRs9Cx/3et4Rgs4=
go.unistack.org/micro-client-grpc/v3 v3.11.10 h1:hbqCL4JLbTtPN1ee16EK6LqTbeIr6HynJJjCRWAu2kk=
go.unistack.org/micro-client-grpc/v3 v3.11.10/go.mod h1:S1AIA2n3GZVxKdjpMcLJSXwBpC/OzAX91D6KxFzqjbc=
go.unistack.org/micro-client-http/v3 v3.9.13 h1:KUWkDfA7p+dZEIgSsWuPjfj6yeX8rrnHYwrEjdAZvmU=
go.unistack.org/micro-client-http/v3 v3.9.13/go.mod h1:WmrmeWWKohGn5ODrCr53wUp4pe/ZE6UYdXh7ECgpOH4=
go.unistack.org/micro-client-http/v3 v3.9.14 h1:26BiMcUlGpxpN+S84tpAeMetbd9rbBd+IILq1CkFP2U=
go.unistack.org/micro-client-http/v3 v3.9.14/go.mod h1:KS6qxpxGDQmcszBaJpidc1KOr528QflEKoGopl0qYJ8=
go.unistack.org/micro-codec-json/v3 v3.10.1 h1:FzmWTfoE2JlzU4EyNqQcsE2bbSOgUKEyNc+GE3aFl9E=
@ -1486,8 +1490,6 @@ google.golang.org/genproto/googleapis/api v0.0.0-20230525234035-dd9d682886f9/go.
google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234015-3fc162c6f38a/go.mod h1:xURIpW9ES5+/GZhnV6beoEtxQrnkRGIfP5VQG2tCBLc=
google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234030-28d5490b6b19/go.mod h1:66JfowdXAEgad5O9NnYcsNPLCPZJD++2L9X0PCMODrA=
google.golang.org/genproto/googleapis/rpc v0.0.0-20230526203410-71b5a4ffd15e/go.mod h1:66JfowdXAEgad5O9NnYcsNPLCPZJD++2L9X0PCMODrA=
google.golang.org/genproto/googleapis/rpc v0.0.0-20241007155032-5fefd90f89a9 h1:QCqS/PdaHTSWGvupk2F/ehwHtGc0/GYkT+3GAcR1CCc=
google.golang.org/genproto/googleapis/rpc v0.0.0-20241007155032-5fefd90f89a9/go.mod h1:GX3210XPVPUjJbTUbvwI8f2IpZDMZuPJWDzDuebbviI=
google.golang.org/genproto/googleapis/rpc v0.0.0-20241113202542-65e8d215514f h1:C1QccEa9kUwvMgEUORqQD9S17QesQijxjZ84sO82mfo=
google.golang.org/genproto/googleapis/rpc v0.0.0-20241113202542-65e8d215514f/go.mod h1:GX3210XPVPUjJbTUbvwI8f2IpZDMZuPJWDzDuebbviI=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
@ -1531,8 +1533,6 @@ google.golang.org/grpc v1.52.3/go.mod h1:pu6fVzoFb+NBYNAvQL08ic+lvB2IojljRYuun5v
google.golang.org/grpc v1.53.0/go.mod h1:OnIrk0ipVdj4N5d9IUoFUx72/VlD7+jUsHwZgwSMQpw=
google.golang.org/grpc v1.54.0/go.mod h1:PUSEXI6iWghWaB6lXM4knEgpJNu2qUcKfDtNci3EC2g=
google.golang.org/grpc v1.57.0/go.mod h1:Sd+9RMTACXwmub0zcNY2c4arhtrbBYD1AUHI/dt16Mo=
google.golang.org/grpc v1.67.1 h1:zWnc1Vrcno+lHZCOofnIMvycFcc0QRGIzm9dhnDX68E=
google.golang.org/grpc v1.67.1/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFNg2AA=
google.golang.org/grpc v1.68.0 h1:aHQeeJbo8zAkAa3pRzrVjZlbz6uSfeOXlJNQM0RAbz0=
google.golang.org/grpc v1.68.0/go.mod h1:fmSPC5AsjSBCK54MyHRx48kpOti1/jRfOlwEWywNjWA=
google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.1.0/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=
@ -1555,8 +1555,6 @@ google.golang.org/protobuf v1.29.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqw
google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
google.golang.org/protobuf v1.35.1 h1:m3LfL6/Ca+fqnjnlqQXNpFPABW1UD7mjh8KO2mKFytA=
google.golang.org/protobuf v1.35.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@ -1569,6 +1567,7 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

View File

@ -22,6 +22,7 @@ type Check struct {
Tasks []*Task `json:"tasks,omitempty" yaml:"tasks,omitempty"`
Timeout mtime.Duration `json:"timeout,omitempty" yaml:"timeout,omitempty"`
Interval mtime.Duration `json:"interval,omitempty" yaml:"interval,omitempty"`
Active bool `json:"active,omitempty" yaml:"active,omitempty"`
}
type HTTPConfig struct {
@ -52,6 +53,7 @@ type Task struct {
TLSVerify *bool `json:"tls_verify,omitempty" yaml:"tls_verify,omitempty"`
Name string `json:"name,omitempty" yaml:"name,omitempty"`
Timeout mtime.Duration `json:"timeout,omitempty" yaml:"timeout,omitempty"`
Active bool `json:"active,omitempty" yaml:"active,omitempty"`
}
func (cfg *Config) Parse(r io.Reader) error {

View File

@ -10,7 +10,7 @@ import (
"go.unistack.org/micro/v3/logger"
)
func Call(ctx context.Context, l logger.Logger, c client.Client, addr string, td time.Duration, req client.Request, rsp interface{}) error {
func Call(ctx context.Context, l logger.Logger, c client.Client, addr string, td time.Duration, req client.Request, rsp interface{}, opts ...client.CallOption) error {
var err error
uid, err := uuid.NewRandom()
if err != nil {

30
pkg/httpconn/httpconn.go Normal file
View File

@ -0,0 +1,30 @@
package httpconn
import (
"context"
"time"
"github.com/google/uuid"
"go.unistack.org/micro/v3/client"
"go.unistack.org/micro/v3/logger"
)
func Call(ctx context.Context, l logger.Logger, c client.Client, addr string, td time.Duration, req client.Request, rsp interface{}, opts ...client.CallOption) error {
var err error
uid, err := uuid.NewRandom()
if err != nil {
l.Error(ctx, "failed to generate x-request-id", err)
return err
}
err = c.Call(ctx, req, rsp,
client.WithAddress(addr),
client.WithRequestTimeout(td),
// client.WithContentType("application/json"),
)
if err != nil {
l.Error(ctx, "call failed", "x-request-id", uid.String(), err)
return err
}
return nil
}