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ajouter RunFile et LockFile

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This commit is contained in:
Jephté Clain 2024-05-17 09:51:31 +04:00
parent 502331664e
commit 096bfe91f8
6 changed files with 260 additions and 19 deletions
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6
src/file/IReader.php
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@ -37,7 +37,7 @@ interface IReader extends _IFile {
* verrouiller en mode partagé puis retourner un objet permettant de lire le
* fichier.
*/
function getReader(bool $lockedByCanRead=false): IReader;
function getReader(bool $alreadyLocked=false): IReader;
/**
* lire tout le contenu du fichier en une seule fois, puis, si $close==true,
@ -45,8 +45,8 @@ interface IReader extends _IFile {
*
* @throws IOException si une erreur se produit
*/
function getContents(bool $close=true, bool $lockedByCanRead=false): string;
function getContents(bool $close=true, bool $alreadyLocked=false): string;
/** désérialiser le contenu du fichier, puis, si $close===true, le fermer */
function unserialize(?array $options=null, bool $close=true, bool $lockedByCanRead=false);
function unserialize(?array $options=null, bool $close=true, bool $alreadyLocked=false);
}

6
src/file/IWriter.php
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@ -30,11 +30,11 @@ interface IWriter extends _IFile {
* verrouiller en mode exclusif puis retourner un objet permettant d'écrire
* dans le fichier
*/
function getWriter(bool $lockedByCanWrite=false): IWriter;
function getWriter(bool $alreadyLocked=false): IWriter;
/** écrire le contenu spécifié dans le fichier */
function putContents(string $contents, bool $close=true, bool $lockedByCanWrite=false): void;
function putContents(string $contents, bool $close=true, bool $alreadyLocked=false): void;
/** sérialiser l'objet dans la destination */
function serialize($object, bool $close=true, bool $lockedByCanWrite=false): void;
function serialize($object, bool $close=true, bool $alreadyLocked=false): void;
}

87
src/file/app/LockFile.php Normal file
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@ -0,0 +1,87 @@
<?php
namespace nur\sery\file\app;
use nur\sery\cl;
use nur\sery\file\base\SharedFile;
use nur\sery\output\msg;
use nur\sery\php\time\DateTime;
/**
* Class LockFile: une classe qui permet à une application de verrouiller
* certaines actions
*/
class LockFile {
const NAME = null;
const TITLE = null;
function __construct($file, ?string $name=null, ?string $title=null) {
$this->file = new SharedFile($file);
$this->name = $name ?? static::NAME;
$this->title = $title ?? static::TITLE;
}
/** @var SharedFile */
protected $file;
/** @var ?string */
protected $name;
/** @var ?string */
protected $title;
protected function initData(): array {
return [
"name" => $this->name,
"title" => $this->title,
"locked" => false,
"date_lock" => null,
"date_release" => null,
];
}
function read(bool $close=true): array {
$data = $this->file->unserialize(null, $close);
if (!is_array($data)) $data = $this->initData();
return $data;
}
function isLocked(?array &$data=null): bool {
$data = $this->read();
return $data["locked"];
}
function warnIfLocked(?array $data=null): void {
if ($data === null) $data = $this->read();
if ($data["locked"]) {
msg::warning("$data[name]: possède le verrou depuis $data[date_lock] -- $data[title]");
}
}
function lock(?array &$data=null): bool {
$file = $this->file;
$data = $this->read(false);
if ($data["locked"]) {
$file->close();
return false;
} else {
$file->ftruncate();
$file->serialize(cl::merge($data, [
"locked" => true,
"date_lock" => new DateTime(),
"date_release" => null,
]));
return true;
}
}
function release(?array &$data=null): void {
$file = $this->file;
$data = $this->read(false);
$file->ftruncate();
$file->serialize(cl::merge($data, [
"locked" => false,
"date_release" => new DateTime(),
]));
}
}

129
src/file/app/RunFile.php Normal file
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@ -0,0 +1,129 @@
<?php
namespace nur\sery\file\app;
use nur\sery\cl;
use nur\sery\file\base\SharedFile;
use nur\sery\os\path;
use nur\sery\php\time\DateTime;
use nur\sery\str;
/**
* Class RunFile: une classe permettant de suivre le fonctionnement d'une
* application qui tourne en tâche de fond
*/
class RunFile {
const RUN_EXT = ".run";
const LOCK_EXT = ".lock";
const NAME = null;
function __construct(string $file, ?string $name=null) {
$file = path::ensure_ext($file, self::RUN_EXT);
$this->file = new SharedFile($file);
$this->name = $name ?? static::NAME;
}
/** @var SharedFile */
protected $file;
/** @var ?string */
protected $name;
protected static function merge(array $data, array $merge): array {
return cl::merge($data, [
"serial" => $data["serial"] + 1,
], $merge);
}
protected function initData(bool $withDateStart=true): array {
$dateStart = $withDateStart? new DateTime(): null;
return [
"name" => $this->name,
"serial" => 0,
"date_start" => $dateStart,
"date_stop" => null,
"action" => null,
"action_date_start" => null,
"action_max_step" => null,
"action_current_step" => null,
"action_date_step" => null,
];
}
function read(): array {
$data = $this->file->unserialize();
if (!is_array($data)) $data = $this->initData(false);
return $data;
}
/** tester si l'application est démarrée */
function isStarted(): bool {
$data = $this->read();
return $data["date_start"] !== null;
}
/** tester si l'application est arrêtée */
function isStopped(): bool {
$data = $this->read();
return $data["date_stop"] !== null;
}
function haveWorked(int $serial, ?int &$currentSerial=null): bool {
$data = $this->read();
return $serial !== $data["serial"];
}
protected function willWrite(): array {
$file = $this->file;
$file->lockWrite();
$data = $file->unserialize(null, false, true);
if (!is_array($data)) {
$data = $this->initData();
$file->ftruncate();
$file->serialize($data, false, true);
}
$file->ftruncate();
return [$file, $data];
}
/** indiquer que l'application démarre */
function start(): void {
$this->file->serialize($this->initData());
}
/** indiquer le début d'une action */
function action(?string $title, ?int $maxSteps=null): void {
[$file, $data] = $this->willWrite();
$file->serialize(self::merge($data, [
"action" => $title,
"action_date_start" => new DateTime(),
"action_max_step" => $maxSteps,
"action_current_step" => 0,
]));
}
/** indiquer qu'une étape est franchie dans l'action en cours */
function step(int $nbSteps=1): void {
[$file, $data] = $this->willWrite();
$file->serialize(self::merge($data, [
"action_date_step" => new DateTime(),
"action_current_step" => $data["action_current_step"] + $nbSteps,
]));
}
/** indiquer que l'application s'arrête */
function stop(): void {
[$file, $data] = $this->willWrite();
$file->serialize(self::merge($data, [
"date_stop" => new DateTime(),
]));
}
function getLockFile(?string $name=null, ?string $title=null): LockFile {
$ext = self::LOCK_EXT;
if ($name !== null) $ext = ".$name$ext";
$file = path::ensure_ext($this->file->getFile(), $ext, self::RUN_EXT);
$name = str::join("/", [$this->name, $name]);
return new LockFile($file, $name, $title);
}
}

43
src/file/base/Stream.php
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@ -234,6 +234,14 @@ class Stream extends AbstractIterator implements IReader, IWriter {
return iterator_to_array($this);
}
/**
* verrouiller le fichier en lecture de façon inconditionelle (ignorer la
* valeur de $useLocking). bloquer jusqu'à ce que le verrou soit disponible
*/
function lockRead(): void {
$this->lock(LOCK_SH);
}
/**
* essayer de verrouiller le fichier en lecture. retourner true si l'opération
* réussit. dans ce cas, il faut appeler {@link getReader()} avec l'argument
@ -248,8 +256,8 @@ class Stream extends AbstractIterator implements IReader, IWriter {
* verrouiller en mode partagé puis retourner un objet permettant de lire le
* fichier.
*/
function getReader(bool $lockedByCanRead=false): IReader {
if ($this->useLocking && !$lockedByCanRead) $this->lock(LOCK_SH);
function getReader(bool $alreadyLocked=false): IReader {
if ($this->useLocking && !$alreadyLocked) $this->lock(LOCK_SH);
return new class($this->fd, ++$this->serial, $this) extends Stream {
function __construct($fd, int $serial, Stream $parent) {
$this->parent = $parent;
@ -270,9 +278,9 @@ class Stream extends AbstractIterator implements IReader, IWriter {
}
/** retourner le contenu du fichier sous forme de chaine */
function getContents(bool $close=true, bool $lockedByCanRead=false): string {
function getContents(bool $close=true, bool $alreadyLocked=false): string {
$useLocking = $this->useLocking;
if ($useLocking && !$lockedByCanRead) $this->lock(LOCK_SH);
if ($useLocking && !$alreadyLocked) $this->lock(LOCK_SH);
try {
return IOException::ensure_valid(stream_get_contents($this->fd), $this->throwOnError);
} finally {
@ -281,8 +289,8 @@ class Stream extends AbstractIterator implements IReader, IWriter {
}
}
function unserialize(?array $options=null, bool $close=true, bool $lockedByCanRead=false) {
$args = [$this->getContents($lockedByCanRead)];
function unserialize(?array $options=null, bool $close=true, bool $alreadyLocked=false) {
$args = [$this->getContents($alreadyLocked)];
if ($options !== null) $args[] = $options;
return unserialize(...$args);
}
@ -331,9 +339,10 @@ class Stream extends AbstractIterator implements IReader, IWriter {
}
/** @throws IOException */
function ftruncate(int $size): self {
function ftruncate(int $size=0, bool $rewind=true): self {
$fd = $this->getResource();
IOException::ensure_valid(ftruncate($fd, $size), $this->throwOnError);
if ($rewind) rewind($fd);
return $this;
}
@ -347,6 +356,14 @@ class Stream extends AbstractIterator implements IReader, IWriter {
return $this;
}
/**
* verrouiller le fichier en écriture de façon inconditionelle (ignorer la
* valeur de $useLocking). bloquer jusqu'à ce que le verrou soit disponible
*/
function lockWrite(): void {
$this->lock(LOCK_EX);
}
/**
* essayer de verrouiller le fichier en écriture. retourner true si l'opération
* réussit. dans ce cas, il faut appeler {@link getWriter()} avec l'argument
@ -361,8 +378,8 @@ class Stream extends AbstractIterator implements IReader, IWriter {
* verrouiller en mode exclusif puis retourner un objet permettant d'écrire
* dans le fichier
*/
function getWriter(bool $lockedByCanWrite=false): IWriter {
if ($this->useLocking && !$lockedByCanWrite) $this->lock(LOCK_EX);
function getWriter(bool $alreadyLocked=false): IWriter {
if ($this->useLocking && !$alreadyLocked) $this->lock(LOCK_EX);
return new class($this->fd, ++$this->serial, $this) extends Stream {
function __construct($fd, int $serial, Stream $parent) {
$this->parent = $parent;
@ -383,9 +400,9 @@ class Stream extends AbstractIterator implements IReader, IWriter {
};
}
function putContents(string $contents, bool $close=true, bool $lockedByCanWrite=false): void {
function putContents(string $contents, bool $close=true, bool $alreadyLocked=false): void {
$useLocking = $this->useLocking;
if ($useLocking && !$lockedByCanWrite) $this->lock(LOCK_EX);
if ($useLocking && !$alreadyLocked) $this->lock(LOCK_EX);
try {
$this->fwrite($contents);
} finally {
@ -394,7 +411,7 @@ class Stream extends AbstractIterator implements IReader, IWriter {
}
}
function serialize($object, bool $close=true, bool $lockedByCanWrite=false): void {
$this->putContents(serialize($object), $lockedByCanWrite);
function serialize($object, bool $close=true, bool $alreadyLocked=false): void {
$this->putContents(serialize($object), $alreadyLocked);
}
}

8
src/file/base/_File.php
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@ -12,9 +12,17 @@ abstract class _File extends Stream {
/** @var string */
protected $file;
function getFile(): ?string {
return $this->file;
}
/** @var string */
protected $mode;
function getMode(): string {
return $this->mode;
}
/** @return resource */
protected function open() {
return IOException::ensure_valid(@fopen($this->file, $this->mode));