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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| // (c) 2019-2020, Ava Labs, Inc. All rights reserved. | ||
| // See the file LICENSE for licensing terms. | ||
|
|
||
| package ipcs | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "path" | ||
|
|
||
| "github.com/ava-labs/gecko/ids" | ||
| "github.com/ava-labs/gecko/snow/triggers" | ||
| "github.com/ava-labs/gecko/utils/logging" | ||
| ) | ||
|
|
||
| const ( | ||
| // DefaultBaseURL can be used as a reasonable default value for the base URL | ||
| DefaultBaseURL = "/tmp" | ||
|
|
||
| ipcIdentifierPrefix = "ipc" | ||
| ipcConsensusIdentifier = "consensus" | ||
| ipcDecisionsIdentifier = "decisions" | ||
| ) | ||
|
|
||
| type context struct { | ||
| log logging.Logger | ||
| networkID uint32 | ||
| path string | ||
| } | ||
|
|
||
| // ChainIPCs maintains IPCs for a set of chains | ||
| type ChainIPCs struct { | ||
| context | ||
| chains map[[32]byte]*EventSockets | ||
| consensusEvents *triggers.EventDispatcher | ||
| decisionEvents *triggers.EventDispatcher | ||
| } | ||
|
|
||
| // NewChainIPCs creates a new *ChainIPCs that writes consensus and decision | ||
| // events to IPC sockets | ||
| func NewChainIPCs(log logging.Logger, path string, networkID uint32, consensusEvents *triggers.EventDispatcher, decisionEvents *triggers.EventDispatcher, defaultChainIDs []ids.ID) (*ChainIPCs, error) { | ||
| cipcs := &ChainIPCs{ | ||
| context: context{ | ||
| log: log, | ||
| networkID: networkID, | ||
| path: path, | ||
| }, | ||
| chains: make(map[[32]byte]*EventSockets), | ||
| consensusEvents: consensusEvents, | ||
| decisionEvents: decisionEvents, | ||
| } | ||
| for _, chainID := range defaultChainIDs { | ||
| if _, err := cipcs.Publish(chainID); err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
| return cipcs, nil | ||
| } | ||
|
|
||
| // Publish creates a set of eventSockets for the given chainID | ||
| func (cipcs *ChainIPCs) Publish(chainID ids.ID) (*EventSockets, error) { | ||
| chainIDKey := chainID.Key() | ||
|
|
||
| if es, ok := cipcs.chains[chainIDKey]; ok { | ||
| cipcs.log.Info("returning existing blockchainID %s", chainID.String()) | ||
| return es, nil | ||
| } | ||
|
|
||
| es, err := newEventSockets(cipcs.context, chainID, cipcs.consensusEvents, cipcs.decisionEvents) | ||
| if err != nil { | ||
| cipcs.log.Error("can't create ipcs: %s", err) | ||
| return nil, err | ||
| } | ||
|
|
||
| cipcs.chains[chainIDKey] = es | ||
| cipcs.log.Info("created IPC sockets for blockchain %s at %s and %s", chainID.String(), es.ConsensusURL(), es.DecisionsURL()) | ||
| return es, nil | ||
| } | ||
|
|
||
| // Unpublish stops the eventSocket for the given chain if it exists. It returns | ||
| // whether or not the socket existed and errors when trying to close it | ||
| func (cipcs *ChainIPCs) Unpublish(chainID ids.ID) (bool, error) { | ||
| chainIPCs, ok := cipcs.chains[chainID.Key()] | ||
| if !ok { | ||
| return false, nil | ||
| } | ||
| return true, chainIPCs.stop() | ||
| } | ||
|
|
||
| func ipcURL(ctx context, chainID ids.ID, eventType string) string { | ||
| return path.Join(ctx.path, fmt.Sprintf("%d-%s-%s", ctx.networkID, chainID.String(), eventType)) | ||
| } |
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