docs: Tweak swing-store export example code to show process synchronization #8174
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mhofman
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Oct 5, 2023
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| if (value) { | ||
| iavl.set(iavlKey, value); | ||
| } else { | ||
| iavl.delete(iavlKey); // value===undefined means delete | ||
| } | ||
| } | ||
| const swingStore = openSwingStore(dirPath, { exportCallback }); | ||
| ... | ||
| await controller.run(); | ||
| hostStorage.commit(); | ||
|
|
||
| // now, if the validator is configured to publish state-sync snapshots, | ||
| // and if this block height is one of the publishing points, | ||
| // do the following: | ||
|
|
||
| // spawn a child process | ||
|
|
||
| // child process does: | ||
| const exporter = makeSwingStoreExporter(dirPath); | ||
| // note: no exporter.getExportData(), the first-stage data is already in IAVL | ||
| const artifacts = new Map(); | ||
| for (const name of exporter.getArtifactNames()) { | ||
| artifacts.set(name, exporter.getArtifact(name)); | ||
| const dirPath = '.../swing-store'; | ||
| const iavl = ...; | ||
| function exportCallback(key, value) { | ||
| const iavlKey = `ssed.${key}`; // 'ssed' is short for SwingStoreExportData | ||
| if (value === undefined) { |
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Sorry need to kick this off the queue |
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Elaborates on the somewhat handwavey "exporter now has a txn, parent process is free to proceed forward".