Cassandra client library for PHP
, (*1)
Cassandra client library for PHP, which support Protocol v3 (Cassandra 2.1) and asynchronous request, (*2)
Features
- Using Protocol v3 (Cassandra 2.1)
- Support ssl/tls with stream transport layer
- Support asynchronous and synchronous request
- Support for logged, unlogged and counter batches
- The ability to specify the consistency, "serial consistency" and all flags defined in the protocol
- Support Query preparation and execute
- Support all data types conversion and binding, including collection types, tuple and UDT
- Support conditional update/insert
- 5 fetch methods (fetchAll, fetchRow, fetchPairs, fetchCol, fetchOne)
- Two transport layers - socket and stream.
- Using exceptions to report errors
- 800% performance improvement(async mode) than other php cassandra client libraries
Installation
PHP 5.4+ is required. There is no need for additional libraries., (*3)
If you want to use Bigint or Timestamp type, 64-bit system is required., (*4)
Append dependency into composer.json, (*5)
...
"require": {
...
"duoshuo/php-cassandra": "dev-master"
}
...
Also you can just fetch project from Github and include in your code:, (*6)
require 'php-cassandra-folder-on-your-computer/php-cassandra.php';
Basic Using
<?php
$nodes = [
'127.0.0.1', // simple way, hostname only
'192.168.0.2:9042', // simple way, hostname with port
[ // advanced way, array including username, password and socket options
'host' => '10.205.48.70',
'port' => 9042, //default 9042
'username' => 'admin',
'password' => 'pass',
'socket' => [SO_RCVTIMEO => ["sec" => 10, "usec" => 0], //socket transport only
],
],
[ // advanced way, using Connection\Stream, persistent connection
'host' => '10.205.48.70',
'port' => 9042,
'username' => 'admin',
'password' => 'pass',
'class' => 'Cassandra\Connection\Stream',//use stream instead of socket, default socket. Stream may not work in some environment
'connectTimeout' => 10, // connection timeout, default 5, stream transport only
'timeout' => 30, // write/recv timeout, default 30, stream transport only
'persistent' => true, // use persistent PHP connection, default false, stream transport only
],
[ // advanced way, using SSL
'class' => 'Cassandra\Connection\Stream', // "class" must be defined as "Cassandra\Connection\Stream" for ssl or tls
'host' => 'ssl://10.205.48.70',// or 'tls://10.205.48.70'
'port' => 9042,
'username' => 'admin',
'password' => 'pass',
],
];
// Create a connection.
$connection = new Cassandra\Connection($nodes, 'my_keyspace');
//Connect
try
{
$connection->connect();
}
catch (Cassandra\Exception $e)
{
echo 'Caught exception: ', $e->getMessage(), "\n";
exit;//if connect failed it may be good idea not to continue
}
// Set consistency level for farther requests (default is CONSISTENCY_ONE)
$connection->setConsistency(Request::CONSISTENCY_QUORUM);
// Run query synchronously.
try
{
$response = $connection->querySync('SELECT * FROM "users" WHERE "id" = ?', [new Cassandra\Type\Uuid('c5420d81-499e-4c9c-ac0c-fa6ba3ebc2bc')]);
}
catch (Cassandra\Exception $e)
{
}
Fetch Data
// Return a SplFixedArray containing all of the result set.
$rows = $response->fetchAll(); // SplFixedArray
// Return a SplFixedArray containing a specified index column from the result set.
$col = $response->fetchCol(); // SplFixedArray
// Return a assoc array with key-value pairs, the key is the first column, the value is the second column.
$col = $response->fetchPairs(); // assoc array
// Return the first row of the result set.
$row = $response->fetchRow(); // ArrayObject
// Return the first column of the first row of the result set.
$value = $response->fetchOne(); // mixed
Query Asynchronously
// Return a statement immediately
try
{
$statement1 = $connection->queryAsync($cql1);
$statement2 = $connection->queryAsync($cql2);
// Wait until received the response, can be reversed order
$response2 = $statement2->getResponse();
$response1 = $statement1->getResponse();
$rows1 = $response1->fetchAll();
$rows2 = $response2->fetchAll();
}
catch (Cassandra\Exception $e)
{
}
Using preparation and data binding
$preparedData = $connection->prepare('SELECT * FROM "users" WHERE "id" = :id');
$strictValues = Cassandra\Request\Request::strictTypeValues(
[
'id' => 'c5420d81-499e-4c9c-ac0c-fa6ba3ebc2bc',
],
$preparedData['metadata']['columns']
);
$response = $connection->executeSync(
$preparedData['id'],
$strictValues,
Cassandra\Request\Request::CONSISTENCY_QUORUM,
[
'page_size' => 100,
'names_for_values' => true,
'skip_metadata' => true,
]
);
$response->setMetadata($preparedData['result_metadata']);
$rows = $response->fetchAll();
Using Batch
$batchRequest = new Cassandra\Request\Batch();
// Append a prepared query
$preparedData = $connection->prepare('UPDATE "students" SET "age" = :age WHERE "id" = :id');
$values = [
'age' => 21,
'id' => 'c5419d81-499e-4c9c-ac0c-fa6ba3ebc2bc',
];
$batchRequest->appendQueryId($preparedData['id'], Cassandra\Request\Request::strictTypeValues($values, $preparedData['metadata']['columns']));
// Append a query string
$batchRequest->appendQuery(
'INSERT INTO "students" ("id", "name", "age") VALUES (:id, :name, :age)',
[
'id' => new Cassandra\Type\Uuid('c5420d81-499e-4c9c-ac0c-fa6ba3ebc2bc'),
'name' => new Cassandra\Type\Varchar('Mark'),
'age' => 20,
]
);
$response = $connection->syncRequest($batchRequest);
$rows = $response->fetchAll();
Supported datatypes
All types are supported., (*7)
// Ascii
new Cassandra\Type\Ascii('string');
// Bigint
new Cassandra\Type\Bigint(10000000000);
// Blob
new Cassandra\Type\Blob('string');
// Boolean
new Cassandra\Type\Boolean(true);
// Counter
new Cassandra\Type\Counter(1000);
// Decimal
new Cassandra\Type\Decimal('0.0123');
// Double
new Cassandra\Type\Double(2.718281828459);
// Float
new Cassandra\Type\PhpFloat(2.718);
// Inet
new Cassandra\Type\Inet('127.0.0.1');
// Int
new Cassandra\Type\PhpInt(1);
// CollectionList
new Cassandra\Type\CollectionList([1, 1, 1], [Cassandra\Type\Base::INT]);
// CollectionMap
new Cassandra\Type\CollectionMap(['a' => 1, 'b' => 2], [Cassandra\Type\Base::ASCII, Cassandra\Type\Base::INT]);
// CollectionSet
new Cassandra\Type\CollectionSet([1, 2, 3], [Cassandra\Type\Base::INT]);
// Timestamp (unit: millisecond)
new Cassandra\Type\Timestamp((int) (microtime(true) * 1000));
new Cassandra\Type\Timestamp(1409830696263);
// Uuid
new Cassandra\Type\Uuid('62c36092-82a1-3a00-93d1-46196ee77204');
// Timeuuid
new Cassandra\Type\Timeuuid('2dc65ebe-300b-11e4-a23b-ab416c39d509');
// Varchar
new Cassandra\Type\Varchar('string');
// Varint
new Cassandra\Type\Varint(10000000000);
// Custom
new Cassandra\Type\Custom('string', 'var_name');
// Tuple
new Cassandra\Type\Tuple([1, '2'], [Cassandra\Type\Base::INT, Cassandra\Type\Base::VARCHAR]);
// UDT
new Cassandra\Type\UDT(['intField' => 1, 'textField' => '2'], ['intField' => Cassandra\Type\Base::INT, 'textField' => Cassandra\Type\Base::VARCHAR]); // in the order defined by the type
Using nested datatypes
// CollectionSet<UDT>, where UDT contains: Int, Text, Boolean, CollectionList<Text>, CollectionList<UDT>
new Cassandra\Type\CollectionSet([
[
'id' => 1,
'name' => 'string',
'active' => true,
'friends' => ['string1', 'string2', 'string3'],
'drinks' => [['qty' => 5, 'brand' => 'Pepsi'], ['qty' => 3, 'brand' => 'Coke']]
],[
'id' => 2,
'name' => 'string',
'active' => false,
'friends' => ['string4', 'string5', 'string6'],
'drinks' => []
]
], [
[
'type' => Cassandra\Type\Base::UDT,
'definition' => [
'id' => Cassandra\Type\Base::INT,
'name' => Cassandra\Type\Base::VARCHAR,
'active' => Cassandra\Type\Base::BOOLEAN,
'friends' => [
'type' => Cassandra\Type\Base::COLLECTION_LIST,
'value' => Cassandra\Type\Base::VARCHAR
],
'drinks' => [
'type' => Cassandra\Type\Base::COLLECTION_LIST,
'value' => [
'type' => Cassandra\Type\Base::UDT,
'typeMap' => [
'qty' => Cassandra\Type\Base::INT,
'brand' => Cassandra\Type\Base::VARCHAR
]
]
]
]
]
]);
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