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requester.go
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/
requester.go
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// generated code; DO NOT EDIT
package scoutclient
import (
"context"
"fmt"
"time"
"github.com/choria-io/go-choria/protocol"
rpcclient "github.com/choria-io/go-choria/providers/agent/mcorpc/client"
"github.com/gosuri/uiprogress"
)
// requester is a generic request handler
type requester struct {
client *ScoutClient
action string
args map[string]interface{}
progress *uiprogress.Bar
}
// do performs the request
func (r *requester) do(ctx context.Context, handler func(pr protocol.Reply, r *rpcclient.RPCReply)) (*rpcclient.Stats, error) {
targets := make([]string, len(r.client.targets))
var err error
r.client.Lock()
copy(targets, r.client.targets)
discoverer := r.client.ns
filters := r.client.filters
fw := r.client.fw
var discoveryStart time.Time
var discoveryEnd time.Time
if len(targets) == 0 {
if r.client.clientOpts.progress {
fmt.Print("Discovering nodes .... ")
} else {
r.client.infof("Starting discovery")
}
discoveryStart = time.Now()
targets, err = discoverer.Discover(ctx, fw, filters)
if err != nil {
return nil, err
}
discoveryEnd = time.Now()
if len(targets) == 0 {
return nil, fmt.Errorf("no nodes were discovered")
}
if r.client.clientOpts.progress {
fmt.Printf("%d\n", len(targets))
} else {
r.client.infof("Discovered %d nodes", len(targets))
}
}
opts := []rpcclient.RequestOption{rpcclient.Targets(targets)}
opts = append(opts, r.client.clientRPCOpts...)
if r.client.workers > 0 {
opts = append(opts, rpcclient.Workers(r.client.workers))
}
if r.client.exprFilter != "" {
opts = append(opts, rpcclient.ReplyExprFilter(r.client.exprFilter))
}
r.client.Unlock()
if r.client.clientOpts.progress {
fmt.Println()
r.configureProgress(len(targets))
}
agent, err := rpcclient.New(r.client.fw, r.client.ddl.Metadata.Name, rpcclient.DDL(r.client.ddl))
if err != nil {
return nil, fmt.Errorf("could not create client: %s", err)
}
if r.client.clientOpts.progress {
opts = append(opts, rpcclient.ReplyHandler(func(pr protocol.Reply, rpcr *rpcclient.RPCReply) {
r.progress.Incr()
handler(pr, rpcr)
}))
} else {
opts = append(opts, rpcclient.ReplyHandler(handler))
}
if !r.client.clientOpts.progress {
r.client.infof("Invoking %s#%s action with %#v", r.client.ddl.Metadata.Name, r.action, r.args)
}
res, err := agent.Do(ctx, r.action, r.args, opts...)
if err != nil {
return nil, fmt.Errorf("could not perform disable request: %s", err)
}
if r.client.clientOpts.progress {
uiprogress.Stop()
fmt.Println()
}
if !discoveryStart.IsZero() && !discoveryEnd.IsZero() {
res.Stats().OverrideDiscoveryTime(discoveryStart, discoveryEnd)
}
return res.Stats(), nil
}
func (r *requester) configureProgress(count int) {
if !r.client.clientOpts.progress {
return
}
r.progress = uiprogress.AddBar(count).AppendCompleted().PrependElapsed()
width := r.client.fw.ProgressWidth()
if width == -1 {
r.client.clientOpts.progress = false
return
}
r.progress.Width = width
r.progress.PrependFunc(func(b *uiprogress.Bar) string {
if b.Current() < count {
return r.client.fw.Colorize("red", "%d / %d", b.Current(), count)
}
return r.client.fw.Colorize("green", "%d / %d", b.Current(), count)
})
uiprogress.Start()
}