2 files changed, 105 insertions, 0 deletions
diff --git a/tools/process.go b/tools/process.go
new file mode 100644
index 00000000..d92755d1
--- /dev/null
+++ b/tools/process.go
@@ -0,0 +1,44 @@
+package tools
+
+import (
+	"github.com/shirou/gopsutil/process"
+	"github.com/spiral/errors"
+	"github.com/spiral/roadrunner/v2/interfaces/worker"
+)
+
+// ProcessState provides information about specific worker.
+type ProcessState struct {
+	// Pid contains process id.
+	Pid int `json:"pid"`
+
+	// Status of the worker.
+	Status string `json:"status"`
+
+	// Number of worker executions.
+	NumJobs int64 `json:"numExecs"`
+
+	// Created is unix nano timestamp of worker creation time.
+	Created int64 `json:"created"`
+
+	// MemoryUsage holds the information about worker memory usage in bytes.
+	// Values might vary for different operating systems and based on RSS.
+	MemoryUsage uint64 `json:"memoryUsage"`
+}
+
+// WorkerProcessState creates new worker state definition.
+func WorkerProcessState(w worker.BaseProcess) (ProcessState, error) {
+	const op = errors.Op("worker_process state")
+	p, _ := process.NewProcess(int32(w.Pid()))
+	i, err := p.MemoryInfo()
+	if err != nil {
+		return ProcessState{}, errors.E(op, err)
+	}
+
+	return ProcessState{
+		Pid:         int(w.Pid()),
+		Status:      w.State().String(),
+		NumJobs:     w.State().NumExecs(),
+		Created:     w.Created().UnixNano(),
+		MemoryUsage: i.RSS,
+	}, nil
+}
diff --git a/tools/worker_table.go b/tools/worker_table.go
new file mode 100644
index 00000000..4aeb6ae7
--- /dev/null
+++ b/tools/worker_table.go
@@ -0,0 +1,61 @@
+package tools
+
+import (
+	"io"
+	"strconv"
+	"time"
+
+	"github.com/dustin/go-humanize"
+	"github.com/fatih/color"
+	"github.com/olekukonko/tablewriter"
+)
+
+// WorkerTable renders table with information about rr server workers.
+func WorkerTable(writer io.Writer, workers []ProcessState) *tablewriter.Table {
+	tw := tablewriter.NewWriter(writer)
+	tw.SetHeader([]string{"PID", "Status", "Execs", "Memory", "Created"})
+	tw.SetColMinWidth(0, 7)
+	tw.SetColMinWidth(1, 9)
+	tw.SetColMinWidth(2, 7)
+	tw.SetColMinWidth(3, 7)
+	tw.SetColMinWidth(4, 18)
+
+	for key := range workers {
+		tw.Append([]string{
+			strconv.Itoa(workers[key].Pid),
+			renderStatus(workers[key].Status),
+			renderJobs(workers[key].NumJobs),
+			humanize.Bytes(workers[key].MemoryUsage),
+			renderAlive(time.Unix(0, workers[key].Created)),
+		})
+	}
+
+	return tw
+}
+
+func renderStatus(status string) string {
+	switch status {
+	case "inactive":
+		return color.YellowString("inactive")
+	case "ready":
+		return color.CyanString("ready")
+	case "working":
+		return color.GreenString("working")
+	case "invalid":
+		return color.YellowString("invalid")
+	case "stopped":
+		return color.RedString("stopped")
+	case "errored":
+		return color.RedString("errored")
+	}
+
+	return status
+}
+
+func renderJobs(number int64) string {
+	return humanize.Comma(number)
+}
+
+func renderAlive(t time.Time) string {
+	return humanize.RelTime(t, time.Now(), "ago", "")
+}