mirror of
https://github.com/cgrates/cgrates.git
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132 lines
3.2 KiB
Go
132 lines
3.2 KiB
Go
/*
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Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
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Copyright (C) ITsysCOM GmbH
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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package services
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import (
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"fmt"
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"sync"
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"github.com/cgrates/cgrates/agents"
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"github.com/cgrates/cgrates/config"
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"github.com/cgrates/cgrates/engine"
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"github.com/cgrates/cgrates/servmanager"
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"github.com/cgrates/cgrates/utils"
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)
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// NewDNSAgent returns the DNS Agent
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func NewDNSAgent(cfg *config.CGRConfig, filterSChan chan *engine.FilterS,
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exitChan chan bool, connMgr *engine.ConnManager) servmanager.Service {
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return &DNSAgent{
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cfg: cfg,
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filterSChan: filterSChan,
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exitChan: exitChan,
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connMgr: connMgr,
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}
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}
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// DNSAgent implements Agent interface
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type DNSAgent struct {
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sync.RWMutex
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cfg *config.CGRConfig
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filterSChan chan *engine.FilterS
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exitChan chan bool
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dns *agents.DNSAgent
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connMgr *engine.ConnManager
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oldListen string
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}
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// Start should handle the sercive start
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func (dns *DNSAgent) Start() (err error) {
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if dns.IsRunning() {
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return utils.ErrServiceAlreadyRunning
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}
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filterS := <-dns.filterSChan
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dns.filterSChan <- filterS
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dns.Lock()
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defer dns.Unlock()
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dns.oldListen = dns.cfg.DNSAgentCfg().Listen
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dns.dns, err = agents.NewDNSAgent(dns.cfg, filterS, dns.connMgr)
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if err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> error: <%s>", utils.DNSAgent, err.Error()))
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return
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}
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go func() {
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if err = dns.dns.ListenAndServe(); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> error: <%s>", utils.DNSAgent, err.Error()))
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dns.exitChan <- true // stop the engine here
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}
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}()
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return
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}
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// Reload handles the change of config
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func (dns *DNSAgent) Reload() (err error) {
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if dns.oldListen == dns.cfg.DNSAgentCfg().Listen {
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return
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}
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if err = dns.Shutdown(); err != nil {
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return
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}
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dns.Lock()
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dns.oldListen = dns.cfg.DNSAgentCfg().Listen
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defer dns.Unlock()
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if err = dns.dns.Reload(); err != nil {
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return
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}
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go func() {
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if err := dns.dns.ListenAndServe(); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> error: <%s>", utils.DNSAgent, err.Error()))
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dns.exitChan <- true // stop the engine here
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}
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}()
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return
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}
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// Shutdown stops the service
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func (dns *DNSAgent) Shutdown() (err error) {
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dns.Lock()
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defer dns.Unlock()
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if err = dns.dns.Shutdown(); err != nil {
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return
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}
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dns.dns = nil
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return
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}
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// IsRunning returns if the service is running
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func (dns *DNSAgent) IsRunning() bool {
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dns.RLock()
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defer dns.RUnlock()
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return dns != nil && dns.dns != nil
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}
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// ServiceName returns the service name
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func (dns *DNSAgent) ServiceName() string {
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return utils.DNSAgent
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}
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// ShouldRun returns if the service should be running
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func (dns *DNSAgent) ShouldRun() bool {
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return dns.cfg.DNSAgentCfg().Enabled
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}
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