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query.go
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query.go
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/*
http://www.apache.org/licenses/LICENSE-2.0.txt
Copyright 2015 Intel Corporation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package tribe
import (
"sync"
"time"
"github.com/intelsdi-x/snap/core"
)
const (
TaskStateQueryResponseSizeLimit int = 1024
)
type taskStateResponses []taskStateResponse
type taskStateResponse struct {
From string
State core.TaskState
}
func (t taskStateResponses) State() core.TaskState {
states := map[core.TaskState]int{}
for _, r := range t {
if _, ok := states[r.State]; !ok {
states[r.State] = 1
}
states[r.State]++
}
state := struct {
count int
state core.TaskState
}{
count: 0,
state: core.TaskStopped,
}
for k, v := range states {
if v > state.count {
state.count = v
state.state = k
}
}
return state.state
}
type taskStateQueryResponse struct {
uuid string
ltime LTime
deadline time.Time
isClosed bool
from map[string]core.TaskState
resp chan taskStateResponse
lock sync.Mutex
}
func newStateQueryResponse(n int, q *taskStateQueryMsg) *taskStateQueryResponse {
return &taskStateQueryResponse{
uuid: q.UUID,
ltime: q.LTime,
from: map[string]core.TaskState{},
resp: make(chan taskStateResponse, n),
}
}
func (s *taskStateQueryResponse) Close() {
s.lock.Lock()
defer s.lock.Unlock()
if s.isClosed {
return
}
if s.resp != nil {
close(s.resp)
}
}