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// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 collector
import (
"time"
"github.com/google/cadvisor/info/v1"
)
// TODO(vmarmol): Export to a custom metrics type when that is available.
// Metric collector.
type Collector interface {
// Collect metrics from this collector.
// Returns the next time this collector should be collected from.
// Next collection time is always returned, even when an error occurs.
// A collection time of zero means no more collection.
Collect(map[string][]v1.MetricVal) (time.Time, map[string][]v1.MetricVal, error)
// Return spec for all metrics associated with this collector
GetSpec() []v1.MetricSpec
// Name of this collector.
Name() string
}
// Manages and runs collectors.
type CollectorManager interface {
// Register a collector.
RegisterCollector(collector Collector) error
// Collect from collectors that are ready and return the next time
// at which a collector will be ready to collect from.
// Next collection time is always returned, even when an error occurs.
// A collection time of zero means no more collection.
Collect() (time.Time, map[string][]v1.MetricVal, error)
// Get metric spec from all registered collectors.
GetSpec() ([]v1.MetricSpec, error)
}
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