/
torque.go
252 lines (208 loc) · 5.04 KB
/
torque.go
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// gorque package is a gateway for Torque(OpenPBS) server.
package gorque
/*
#cgo LDFLAGS: -ltorque
#include <stdlib.h>
#include <pbs_ifl.h>
#include <pbs_error.h>
*/
import "C"
import (
"errors"
"strings"
"unsafe"
)
// torque connection.
type Torque struct {
serverName string // conneted server nama.e
serverID int // connection descriptor
}
// Attribute is wrapper of pbs_ifl attibute.
type Attribute struct {
name string
resource string
value string
op string
}
// Server data.
type Server struct {
name string
attr map[string]Attribute
}
// Queue data.
type Queue struct {
name string
attr map[string]Attribute
}
// Node data.
type Node struct {
name string
attr map[string]Attribute
status map[string]string
}
// Job data.
type Job struct {
name string
attr map[string]Attribute
variableList map[string]string
}
// batchOp is mapping enum to string.
var batchOp = map[C.enum_batch_op]string{
C.SET: "SET",
C.UNSET: "UNSET",
C.INCR: "INCR",
C.DECR: "DECR",
C.EQ: "EQ",
C.NE: "NE",
C.GE: "GE",
C.GT: "GT",
C.LE: "LE",
C.LT: "ET",
C.DFLT: "DFLT",
C.MERGE: "MERGE",
}
// GetLastError return last error.
func GetLastError() error {
en := C.pbs_errno
estr := C.pbs_strerror(en) // static string
return errors.New(C.GoString(estr))
}
// DefaultServername return pbs_server.
func DefaultServerName() string {
return C.GoString(C.pbs_server)
}
// ConnectServer open connection to serverName.
func ConnectServer(serverName string) (*Torque, error) {
srv := C.CString(serverName)
con := int(C.pbs_connect(srv))
C.free(unsafe.Pointer(srv))
if con < 0 {
return nil, GetLastError()
}
return &Torque{serverName: serverName, serverID: con}, nil
}
// Connect open connection to default server.
func Connect() (*Torque, error) {
srv := DefaultServerName()
return ConnectServer(srv)
}
// Disconnect close connection.
func (t *Torque) Disconnect() {
C.pbs_disconnect(C.int(t.serverID))
t.serverID = -1
}
// ServerName return connected server name.
func (t *Torque) ServerName() string {
return t.serverName
}
// StatServer return statserver.
func (t *Torque) StatServer() (Server, error) {
bs := C.pbs_statserver(C.int(t.serverID), nil, nil)
if bs == nil {
return Server{}, GetLastError()
}
defer C.pbs_statfree(bs)
srv := Server{name: C.GoString(bs.name)}
srv.attr = make(map[string]Attribute)
for name, attr := range attrlToAttributeMap(bs.attribs) {
srv.attr[name] = attr
}
return srv, nil
}
// StatQeueu return stat all queue.
func (t *Torque) StatQue() ([]Queue, error) {
bs := C.pbs_statque(C.int(t.serverID), nil, nil, nil)
if bs == nil {
return nil, GetLastError()
}
defer C.pbs_statfree(bs)
queues := make([]Queue, 0, 1)
for cur := bs; cur != nil; cur = cur.next {
q := Queue{}
q.name = C.GoString(cur.name)
q.attr = make(map[string]Attribute)
for name, attr := range attrlToAttributeMap(cur.attribs) {
q.attr[name] = attr
}
queues = append(queues, q)
}
return queues, nil
}
// StatNode return stat all nodes.
func (t *Torque) StatNode() ([]Node, error) {
bs := C.pbs_statnode(C.int(t.serverID), nil, nil, nil)
if bs == nil {
return nil, GetLastError()
}
defer C.pbs_statfree(bs)
nodes := make([]Node, 0, 1)
for cur := bs; cur != nil; cur = cur.next {
n := Node{}
n.name = C.GoString(cur.name)
n.attr = make(map[string]Attribute)
for name, attr := range attrlToAttributeMap(cur.attribs) {
n.attr[name] = attr
}
status := n.attr["status"]
delete(n.attr, "status")
n.status = kvlistToMap(status.value)
nodes = append(nodes, n)
}
return nodes, nil
}
// StatJob return stat all jobs.
// if id is not empty, return specified job
func (t *Torque) StatJob(jobid string) ([]Job, error) {
var cid *C.char
if len(jobid) != 0 {
cid = C.CString(jobid)
defer C.free(unsafe.Pointer(cid))
}
bs := C.pbs_statjob(C.int(t.serverID), cid, nil, nil)
if bs == nil {
return nil, GetLastError()
}
defer C.pbs_statfree(bs)
jobs := make([]Job, 0, 1)
for cur := bs; cur != nil; cur = cur.next {
j := Job{}
j.name = C.GoString(cur.name)
j.attr = make(map[string]Attribute)
for name, attr := range attrlToAttributeMap(cur.attribs) {
j.attr[name] = attr
}
vl := j.attr["Variable_List"]
delete(j.attr, "Variable_List")
j.variableList = kvlistToMap(vl.value)
jobs = append(jobs, j)
}
return jobs, nil
}
func attrlToAttributeMap(attrl *C.struct_attrl) map[string]Attribute {
attrmap := make(map[string]Attribute)
for attr := attrl; attr != nil; attr = attr.next {
op := C.enum_batch_op(attr.op)
sop := batchOp[op]
name := C.GoString(attr.name)
key := name
if attr.resource != nil {
key += "." + C.GoString(attr.resource)
}
attrmap[key] = Attribute{
name: name,
value: C.GoString(attr.value),
resource: C.GoString(attr.resource),
op: sop}
}
return attrmap
}
func kvlistToMap(kvlist string) map[string]string {
strmap := make(map[string]string)
for _, s := range strings.Split(kvlist, ",") {
kv := strings.Split(s, "=")
if len(kv) == 2 {
strmap[kv[0]] = kv[1]
}
}
return strmap
}