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57 lines
1.9 KiB
57 lines
1.9 KiB
9 years ago
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/*
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* Minio Cloud Storage, (C) 2015 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package tasker
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import "github.com/minio/minio/pkg/probe"
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// Handle as the name suggests is a handle (self reference) to its
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// own task structure. Task has limited privileges over itself. Only the
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// task controller (TaskCtl) can manage the task by sending commands to
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// the task over channels.
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type Handle struct {
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this taskRef
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cmdCh <-chan Command // Channel to receive commands from TaskCtl.
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statusCh chan<- status // Channel to send completion status and error (if any) to TaskCtl.
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closeCh chan<- taskRef // Channel to notify the TaskCtl about ending this task.
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}
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// Listen returns a channel to receive commands.
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func (t Handle) Listen() <-chan Command {
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return t.cmdCh
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}
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// StatusDone acknowledges successful completion of a command.
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func (t Handle) StatusDone() {
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t.statusCh <- status{code: statusDone, err: nil}
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}
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// StatusBusy rejects a command with busy status.
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func (t Handle) StatusBusy() {
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t.statusCh <- status{code: statusBusy, err: nil}
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}
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// StatusFail returns failure status.
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func (t Handle) StatusFail(err *probe.Error) {
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t.statusCh <- status{code: statusFail, err: err}
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}
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// Close notifies the TaskCtl about the end of this Task. Owner of the
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// task must invoke Close() when it is done performing its job.
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func (t Handle) Close() {
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t.closeCh <- t.this
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}
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