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process.go
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process.go
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/*
* Copyright (c) 2018. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
// Package registry provides the main glue between services
//
// It wraps micro registry (running services declared to the discovery server) into a more generic registry where all
// actual plugins are self-declared.
package registry
import (
"strconv"
"strings"
"sync"
"github.com/micro/go-micro/registry"
)
var (
ProcessStartTags []string
)
type Process struct {
Id string
ParentId string
MetricsPort int
PeerId string
PeerAddress string
StartTag string
sLock *sync.RWMutex
Services map[string]string
}
func NewProcess(pid string) *Process {
process := &Process{
Id: pid,
Services: make(map[string]string),
sLock: &sync.RWMutex{},
}
return process
}
func (p *pydioregistry) registerProcessFromNode(n *registry.Node, serviceName string) {
pid, ok := n.Metadata[serviceMetaPID]
if !ok {
return
}
p.processeslock.Lock()
defer p.processeslock.Unlock()
if proc, e := p.processes[pid]; e {
proc.sLock.Lock()
defer proc.sLock.Unlock()
proc.Services[serviceName] = serviceName
return
}
process := NewProcess(pid)
process.PeerId = n.Id
process.PeerAddress = n.Address
process.Services[serviceName] = serviceName
if parent, ok := n.Metadata[serviceMetaParentPID]; ok {
process.ParentId = parent
}
if port, ok := n.Metadata[serviceMetaMetrics]; ok {
if met, e := strconv.ParseInt(port, 10, 32); e == nil {
process.MetricsPort = int(met)
}
}
if start, ok := n.Metadata[serviceMetaStartTag]; ok {
process.StartTag = start
}
p.processes[pid] = process
}
func (p *pydioregistry) deregisterProcessFromNode(n *registry.Node, serviceName string) {
p.processeslock.Lock()
defer p.processeslock.Unlock()
pid, hasP := n.Metadata[serviceMetaPID]
if !hasP {
// A full peer was deleted
for pid, proc := range p.processes {
if proc.PeerAddress == n.Address && strings.HasSuffix(proc.PeerId, n.Id) {
delete(p.processes, pid)
return
}
}
return
}
process, ok := p.processes[pid]
if !ok {
return
}
process.sLock.Lock()
defer process.sLock.Unlock()
delete(process.Services, serviceName)
if len(process.Services) == 0 {
delete(p.processes, pid)
}
}
// GetProcesses implements registry GetProcesses method, by creating a copy of the
// internal processes list
func (p *pydioregistry) GetProcesses() map[string]*Process {
p.processeslock.RLock()
defer p.processeslock.RUnlock()
pp := make(map[string]*Process, len(p.processes))
for k, v := range p.processes {
pp[k] = v
}
return pp
}
func GetProcesses() map[string]*Process {
return Default.GetProcesses()
}