Class QdbBatch

A collection of operation that can be executed with a single query.

Operation are executed by a call to \QdbCluster::runBatch()

Namespace: qdb
Example:

$batch = new QdbBatch();
$batch->put('key 0', 'value 0');
$batch->put('key 1', 'value 1');
$batch->get('key 2');

$result = $cluster->runBatch($batch);

$value2 = $result[2];

Methods summary
`public`	# `__construct( )` Creates an empty batch, i.e. an empty collection of operation. Creates an empty batch, i.e. an empty collection of operation.
`public`	# `compareAndSwap( string $alias, string $new_content, string $comparand, integer $expiry_time = 0 )` Adds a "compare and swap" operation to the batch. Adds a "compare and swap" operation to the batch. When executed, the "compare and swap" operation atomically compares a blob with `$comparand` and updates it to `$new_content` if, and only if, they match. Parameters `$alias` The blob's alias. `$new_content` The new content of the blob in case of match. `$comparand` The content to be compared to. `$expiry_time` The absolute expiration time, in seconds since epoch (`0` means "never expires"). See `qdb\QdbBlob::compareAndSwap()`
`public`	# `get( string $alias )` Adds a "get" operation to the batch. Adds a "get" operation to the batch. When executed, the "get" operation reads the content of a blob. Parameters `$alias` The blob's alias. See `qdb\QdbBlob::get()`
`public`	# `getAndRemove( string $alias )` Adds a "get and remove" operation to the batch. Adds a "get and remove" operation to the batch. When executed, the "get and remove" operation atomically reads a blob and removes it. Parameters `$alias` The blob's alias. See `qdb\QdbBlob::getAndRemove()`
`public`	# `getAndUpdate( string $alias, string $content, integer $expiry_time = 0 )` Adds a "get and remove" operation to the batch. Adds a "get and remove" operation to the batch. When executed, the "get and remove" operation atomically reads a blob's content and replaces it. Parameters `$alias` The blob's alias. `$content` The new content of the blob. `$expiry_time` The absolute expiration time, in seconds since epoch (`0` means "never expires"). See `qdb\QdbBlob::getAndUpdate()`
`public`	# `put( string $alias, string $content, integer $expiry_time = 0 )` Adds a "put" operation to the batch. Adds a "put" operation to the batch. When executed, the "put" operation creates a blob. Parameters `$alias` The blob's alias. `$content` The initial content of the blob. `$expiry_time` The absolute expiration time, in seconds since epoch (`0` means "never expires"). See `qdb\QdbBlob::put()`
`public`	# `remove( string $alias )` Adds a "remove" operation to the batch. When executed, the "remove" operation removes an entry. Adds a "remove" operation to the batch. When executed, the "remove" operation removes an entry. Parameters `$alias` The entry's alias. See `qdb\QdbEntry::remove()`
`public`	# `removeIf( string $alias, string $comparand )` Adds a "remove if" operation to the batch. Adds a "remove if" operation to the batch. When executed, the "remove if" operation removes a blob if it matches `$comparand`. The operation is atomic. Parameters `$alias` The blob's alias. `$comparand` The content to be compared to. See `qdb\QdbBlob::removeIf()`
`public`	# `update( string $alias, string $content, integer $expiry_time = 0 )` Adds an "update" operation to the batch. Adds an "update" operation to the batch. When executed, the "update" operation sets the content of a blob. It will create the blob if needed. Parameters `$alias` The blob's alias. `$content` The new content of the blob. `$expiry_time` The absolute expiration time, in seconds since epoch (`0` means "never expires"). See `qdb\QdbBlob::update()`

Namespaces

Classes

Class QdbBatch

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