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chore(xo-server/vhd-merge): abstract FD handling (#2757)

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Due to our smart implementation, the Vhd class does not need to be aware of the fact that the file is already opened.
This commit is contained in:
Julien Fontanet 2018-03-13 15:09:21 +01:00 committed by GitHub
parent 782505b292
commit f45935aa44
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1 changed files with 12 additions and 14 deletions
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22
packages/xo-server/src/vhd-merge.js
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@ -194,7 +194,7 @@ export class Vhd {
// =================================================================
_readStream (start, n) {
return this._handler.createReadStream(this._fd ? this._fd : this._path, {
return this._handler.createReadStream(this._path, {
start,
end: start + n - 1, // end is inclusive
})
@ -394,13 +394,10 @@ export class Vhd {
}`
)
// TODO: could probably be merged in remote handlers.
const stream = await this._handler.createOutputStream(
this._fd ? this._fd : this._path,
{
const stream = await this._handler.createOutputStream(this._path, {
flags: 'r+',
start: offset,
}
)
})
return Buffer.isBuffer(data)
? new Promise((resolve, reject) => {
stream.on('error', reject)
@ -648,12 +645,13 @@ export default concurrency(2)(async function vhdMerge (
childHandler,
childPath
) {
const parentVhd = new Vhd(parentHandler, parentPath)
parentVhd._fd = await parentHandler.openFile(parentPath, 'r+')
const parentFd = await parentHandler.openFile(parentPath, 'r+')
try {
const childVhd = new Vhd(childHandler, childPath)
childVhd._fd = await childHandler.openFile(childPath, 'r')
const parentVhd = new Vhd(parentHandler, parentFd)
const childFd = await childHandler.openFile(childPath, 'r')
try {
const childVhd = new Vhd(childHandler, childFd)
// Reading footer and header.
await Promise.all([
parentVhd.readHeaderAndFooter(),
@ -706,10 +704,10 @@ export default concurrency(2)(async function vhdMerge (
return mergedDataSize
} finally {
await childHandler.closeFile(childVhd._fd)
await childHandler.closeFile(childFd)
}
} finally {
await parentHandler.closeFile(parentVhd._fd)
await parentHandler.closeFile(parentFd)
}
})