forked from tmc/pqstream
/
main.go
77 lines (67 loc) · 1.64 KB
/
main.go
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// pqs is the client for psqd which allows subscription to change events in a postgres database cluster.
package main
import (
"context"
"flag"
"fmt"
"log"
"net/http"
"os"
_ "net/http/pprof"
"github.com/google/gops/agent"
_ "golang.org/x/net/trace"
"google.golang.org/grpc"
"github.com/golang/protobuf/jsonpb"
_ "github.com/kardianos/minwinsvc" // import minwinsvc for windows service support
"github.com/pkg/errors"
"github.com/tmc/pqstream/ctxutil"
"github.com/tmc/pqstream/pqs"
)
var (
pqsdAddr = flag.String("connect", ":7000", "pqsd address")
tableRegexp = flag.String("tables", ".*", "regexp of tables to match")
debugAddr = flag.String("debugaddr", ":7001", "listen debug addr")
)
func main() {
flag.Parse()
if err := run(ctxutil.BackgroundWithSignals()); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func run(ctx context.Context) error {
// starts the gops diagnostics agent
if err := agent.Listen(agent.Options{
ShutdownCleanup: true,
}); err != nil {
return err
}
conn, err := grpc.DialContext(ctx, *pqsdAddr, grpc.WithInsecure())
if err != nil {
return errors.Wrap(err, "dial")
}
defer conn.Close()
c, err := pqs.NewPQStreamClient(conn).Listen(ctx, &pqs.ListenRequest{
TableRegexp: *tableRegexp,
})
if err != nil {
return err
}
go func() {
<-ctx.Done()
log.Println("context done.")
}()
go http.ListenAndServe(*debugAddr, nil)
// TODO(tmc): add format flag to control output (probably offer text/template)
m := &jsonpb.Marshaler{}
for {
ev, err := c.Recv()
if err != nil {
return err
}
if err := m.Marshal(os.Stdout, ev); err != nil {
return err
}
fmt.Println()
}
}