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channel.go
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channel.go
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/*
* === This file is part of ALICE O² ===
*
* Copyright 2018 CERN and copyright holders of ALICE O².
* Author: Teo Mrnjavac <teo.mrnjavac@cern.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In applying this license CERN does not waive the privileges and
* immunities granted to it by virtue of its status as an
* Intergovernmental Organization or submit itself to any jurisdiction.
*/
package channel
import (
"errors"
"strconv"
"strings"
"github.com/AliceO2Group/Control/common/logger"
"github.com/sirupsen/logrus"
)
var log = logger.New(logrus.StandardLogger(), "channel")
type Channel struct {
Name string `yaml:"name"`
Type ChannelType `yaml:"type"`
SndBufSize int `yaml:"sndBufSize"`
RcvBufSize int `yaml:"rcvBufSize"`
RateLogging string `yaml:"rateLogging"` //actually an int but we allow templating
Transport TransportType `yaml:"transport"` //default: default
Target string `yaml:"target"` //default: empty
// allowed values for `target` field:
// outbound channel (mandatory!): ->outbound.go
// tcp://host:port
// ipc://named-pipe-name
// path.to.role:channel_name
// global_channel_name
// inbound channel (optional!): ->inbound.go
// tcp://host:port
// ipc://named-pipe-name
// <empty> -> automatic port assignment (pre-v0.24 behaviour)
}
func (c *Channel) UnmarshalYAML(unmarshal func(interface{}) error) (err error) {
type _channel struct {
Name string `yaml:"name"`
Type ChannelType `yaml:"type"`
SndBufSize string `yaml:"sndBufSize"`
RcvBufSize string `yaml:"rcvBufSize"`
RateLogging string `yaml:"rateLogging"`
Transport TransportType `yaml:"transport"`
Target string `yaml:"target"`
}
aux := _channel{}
err = unmarshal(&aux)
if err != nil {
return
}
c.Name = aux.Name
c.Type = aux.Type
if aux.SndBufSize == "" {
aux.SndBufSize = "1000"
}
if aux.RcvBufSize == "" {
aux.RcvBufSize = "1000"
}
if aux.RateLogging == "" {
aux.RateLogging = "0"
}
if len(aux.Transport) == 0 {
aux.Transport = DEFAULT
}
c.SndBufSize, err = strconv.Atoi(aux.SndBufSize)
if err != nil {
return
}
c.RcvBufSize, err = strconv.Atoi(aux.RcvBufSize)
if err != nil {
return
}
c.RateLogging = aux.RateLogging
c.Transport = aux.Transport
c.Target = strings.TrimSpace(aux.Target)
return
}
// TODO: FairMQ has the following channel types:
// push/pull/pub/sub/spub/xsub/pair/req/rep/dealer/router
// Do we need to support them all?
type ChannelType string
const (
PUSH = ChannelType("push")
PULL = ChannelType("pull")
PUB = ChannelType("pub")
SUB = ChannelType("sub")
)
func (ct ChannelType) String() string {
return string(ct)
}
func (ct *ChannelType) UnmarshalText(b []byte) error {
str := strings.ToLower(strings.Trim(string(b), `"`))
switch str {
case PUSH.String(), PULL.String(), PUB.String(), SUB.String():
*ct = ChannelType(str)
default:
return errors.New("invalid channel type: " + str)
}
return nil
}