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Merge pull request #445 from mempool/simon/disk-cache-save-error

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Only allow one disk cache saving simultaneously, and allow for partia…
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wiz 2021-04-12 18:40:32 +09:00 committed by GitHub
commit f61e3d8cec
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1 changed files with 20 additions and 8 deletions
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28
backend/src/api/disk-cache.ts
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@ -12,6 +12,7 @@ class DiskCache {
private static FILE_NAME = config.MEMPOOL.CACHE_DIR + '/cache.json';
private static FILE_NAMES = config.MEMPOOL.CACHE_DIR + '/cache{number}.json';
private static CHUNK_FILES = 25;
private isWritingCache = false;
constructor() { }
@ -19,8 +20,13 @@ class DiskCache {
if (!cluster.isMaster) {
return;
}
if (this.isWritingCache) {
logger.debug('Saving cache already in progress. Skipping.')
return;
}
try {
logger.debug('Writing mempool and blocks data to disk cache (async)...');
this.isWritingCache = true;
const mempool = memPool.getMempool();
const mempoolArray: TransactionExtended[] = [];
@ -44,8 +50,10 @@ class DiskCache {
}), {flag: 'w'});
}
logger.debug('Mempool and blocks data saved to disk cache');
this.isWritingCache = false;
} catch (e) {
logger.warn('Error writing to cache file: ' + e.message || e);
this.isWritingCache = false;
}
}
@ -68,22 +76,26 @@ class DiskCache {
for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
const fileName = DiskCache.FILE_NAMES.replace('{number}', i.toString());
if (fs.existsSync(fileName)) {
const cacheData2 = JSON.parse(fs.readFileSync(fileName, 'utf8'));
if (cacheData2.mempoolArray) {
for (const tx of cacheData2.mempoolArray) {
data.mempool[tx.txid] = tx;
try {
if (fs.existsSync(fileName)) {
const cacheData2 = JSON.parse(fs.readFileSync(fileName, 'utf8'));
if (cacheData2.mempoolArray) {
for (const tx of cacheData2.mempoolArray) {
data.mempool[tx.txid] = tx;
}
} else {
Object.assign(data.mempool, cacheData2.mempool);
}
} else {
Object.assign(data.mempool, cacheData2.mempool);
}
} catch (e) {
logger.debug('Error parsing ' + fileName + '. Skipping.');
}
}
memPool.setMempool(data.mempool);
blocks.setBlocks(data.blocks);
} catch (e) {
logger.warn('Failed to parse mempoool and blocks cache. Skipping...');
logger.warn('Failed to parse mempoool and blocks cache. Skipping.');
}
}
}