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// SPDX-License-Identifier: GPL-3.0-or-later
package tomcat
import (
"encoding/xml"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"strings"
"github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/stm"
"github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/web"
)
var (
urlPathServerStatus = "/manager/status"
urlQueryServerStatus = url.Values{"XML": {"true"}}.Encode()
)
func (t *Tomcat) collect() (map[string]int64, error) {
mx, err := t.collectServerStatus()
if err != nil {
return nil, err
}
return mx, nil
}
func (t *Tomcat) collectServerStatus() (map[string]int64, error) {
resp, err := t.queryServerStatus()
if err != nil {
return nil, err
}
if len(resp.Connectors) == 0 {
return nil, errors.New("unexpected response: not tomcat server status data")
}
seenConns, seenPools := make(map[string]bool), make(map[string]bool)
for i, v := range resp.Connectors {
resp.Connectors[i].STMKey = cleanName(v.Name)
ti := &resp.Connectors[i].ThreadInfo
ti.CurrentThreadsIdle = ti.CurrentThreadCount - ti.CurrentThreadsBusy
seenConns[v.Name] = true
if !t.seenConnectors[v.Name] {
t.seenConnectors[v.Name] = true
t.addConnectorCharts(v.Name)
}
}
for i, v := range resp.JVM.MemoryPools {
resp.JVM.MemoryPools[i].STMKey = cleanName(v.Name)
seenPools[v.Name] = true
if !t.seenMemPools[v.Name] {
t.seenMemPools[v.Name] = true
t.addMemPoolCharts(v.Name, v.Type)
}
}
for name := range t.seenConnectors {
if !seenConns[name] {
delete(t.seenConnectors, name)
t.removeConnectorCharts(name)
}
}
for name := range t.seenMemPools {
if !seenPools[name] {
delete(t.seenMemPools, name)
t.removeMemoryPoolCharts(name)
}
}
resp.JVM.Memory.Used = resp.JVM.Memory.Total - resp.JVM.Memory.Free
return stm.ToMap(resp), nil
}
func cleanName(name string) string {
r := strings.NewReplacer(" ", "_", ".", "_", "\"", "", "'", "")
return strings.ToLower(r.Replace(name))
}
func (t *Tomcat) queryServerStatus() (*serverStatusResponse, error) {
req, err := web.NewHTTPRequestWithPath(t.Request, urlPathServerStatus)
if err != nil {
return nil, err
}
req.URL.RawQuery = urlQueryServerStatus
var status serverStatusResponse
if err := t.doOKDecode(req, &status); err != nil {
return nil, err
}
return &status, nil
}
func (t *Tomcat) doOKDecode(req *http.Request, in interface{}) error {
resp, err := t.httpClient.Do(req)
if err != nil {
return fmt.Errorf("error on HTTP request '%s': %v", req.URL, err)
}
defer closeBody(resp)
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("'%s' returned HTTP status code: %d", req.URL, resp.StatusCode)
}
if err := xml.NewDecoder(resp.Body).Decode(in); err != nil {
return fmt.Errorf("error decoding XML response from '%s': %v", req.URL, err)
}
return nil
}
func closeBody(resp *http.Response) {
if resp != nil && resp.Body != nil {
_, _ = io.Copy(io.Discard, resp.Body)
_ = resp.Body.Close()
}
}
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