79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
// Package numpin implements an ipfs-cluster informer which determines how many
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// items this peer is pinning and returns it as api.Metric
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package numpin
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import (
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"fmt"
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rpc "github.com/hsanjuan/go-libp2p-gorpc"
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"github.com/ipfs/ipfs-cluster/api"
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)
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// MetricTTL specifies how long our reported metric is valid in seconds.
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var MetricTTL = 10
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// MetricName specifies the name of our metric
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var MetricName = "numpin"
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// Informer is a simple object to implement the ipfscluster.Informer
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// and Component interfaces
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type Informer struct {
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rpcClient *rpc.Client
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}
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// NewInformer returns an initialized Informer.
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func NewInformer() *Informer {
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return &Informer{}
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}
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// SetClient provides us with an rpc.Client which allows
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// contacting other components in the cluster.
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func (npi *Informer) SetClient(c *rpc.Client) {
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npi.rpcClient = c
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}
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// Shutdown is called on cluster shutdown. We just invalidate
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// any metrics from this point.
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func (npi *Informer) Shutdown() error {
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npi.rpcClient = nil
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return nil
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}
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// Name returns the name of this informer
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func (npi *Informer) Name() string {
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return MetricName
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}
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// GetMetric contacts the IPFSConnector component and
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// requests the `pin ls` command. We return the number
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// of pins in IPFS.
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func (npi *Informer) GetMetric() api.Metric {
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if npi.rpcClient == nil {
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return api.Metric{
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Valid: false,
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}
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}
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pinMap := make(map[string]api.IPFSPinStatus)
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// make use of the RPC API to obtain information
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// about the number of pins in IPFS. See RPCAPI docs.
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err := npi.rpcClient.Call("", // Local call
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"Cluster", // Service name
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"IPFSPinLs", // Method name
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"recursive", // in arg
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&pinMap) // out arg
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valid := err == nil
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m := api.Metric{
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Name: MetricName,
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Value: fmt.Sprintf("%d", len(pinMap)),
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Valid: valid,
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}
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m.SetTTL(MetricTTL)
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return m
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}
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