public static function get_client($write_mode = false)
{
// * Try to connect to every cassandra node in order
// * Failed connections will be retried
// * Once a connection is opened, it stays open
// * TODO: add random and round robin order
// * TODO: add write-preferred and read-preferred nodes
if (self::$last_get instanceof CassandraClient) {
return self::$last_get;
}
shuffle(self::$connections);
foreach (self::$connections as $connection) {
try {
$transport = $connection['transport'];
$client = $connection['client'];
if (!$transport->isOpen()) {
$transport->open();
}
self::$last_get = $client;
return $client;
} catch (TException $tx) {
self::$last_error = 'TException: ' . $tx->getMessage() . "\n";
continue;
}
}
throw new Exception("Could not connect to a cassandra server");
}
/**
* Constructs a new CDM model
*
* @param key record key to load
*/
public function __construct($key = NULL)
{
if (!CDM::$_connected) {
foreach (Kohana::config('cdm')->connection['hosts'] as $host) {
// Connect to cassandra nodes
CassandraConn::add_node($host['hostname'], $host['port']);
}
CDM::$_connected = TRUE;
}
if (!isset($this->_keyspace)) {
// Find the application keyspace if not already set
$this->_keyspace = Kohana::config('cdm')->keyspace;
}
if (!isset($this->_column_family)) {
// Use singular version of model name for the column family
$this->_column_family = Inflector::singular(strtolower(substr(get_class($this), 10)));
}
if (!isset(CDM::$_managers[$this->_keyspace][$this->_column_family])) {
// Create column manager
CDM::$_managers[$this->_keyspace][$this->_column_family] = new CassandraCF($this->_keyspace, $this->_column_family, $this->_is_super);
}
$this->_manager = CDM::$_managers[$this->_keyspace][$this->_column_family];
if ($key !== NULL) {
// Load initial record
$this->find($key);
}
}
public static function connect()
{
foreach (self::$nodes as $node) {
CassandraConn::add_node($node['host'], $node['port']);
}
self::loadColumnFamilies();
}
public function remove($key, $column_name = null)
{
$timestamp = time();
$column_path = new cassandra_ColumnPath();
$column_path->column_family = $this->column_family;
if ($this->is_super) {
$column_path->super_column = $this->unparse_column_name($column_name, true);
} else {
$column_path->column = $this->unparse_column_name($column_name, false);
}
$client = CassandraConn::get_client();
$resp = $client->remove($this->keyspace, $key, $column_path, $timestamp, $this->write_consistency_level);
return $resp;
}
<?php
function record_time(&$start, $usage = "")
{
$end = microtime(true);
$cost = $end - $start;
$cost = ceil(1000000 * $cost);
if ($usage) {
echo "{$usage} use time {$cost} us\n";
}
$start = $end;
}
echo "<pre>\n";
record_time($start, "");
require_once 'config.php';
CassandraConn::add_node('localhost', 9160);
class Test
{
static function testUUID()
{
$id = UUID::generate(UUID::UUID_TIME, UUID::FMT_STRING, 'node', 'ns');
echo "{$id}\n";
$id = UUID::generate(UUID::UUID_TIME, UUID::FMT_STRING, 'node', 'ns');
echo "{$id}\n";
$id = UUID::generate(UUID::UUID_TIME, UUID::FMT_STRING, 'node', 'ns');
echo "{$id}\n";
$packid = UUID::convert($id, UUID::FMT_STRING, UUID::FMT_BINARY);
echo strlen($packid) . "\n";
echo UUID::convert($packid, UUID::FMT_BINARY, UUID::FMT_STRING) . "\n";
}
public static function testSuper()
/**
* 清除指定colnames
* @param $key
* @param $super
* @param $colnames
* @return
*/
public function erase($key, $colnames, $sc_name = null)
{
$mu = new cassandra_Mutation();
$del = new cassandra_Deletion();
$slice = new cassandra_SlicePredicate();
$slice->column_names = array('name', 'time');
$del->predicate = $slice;
$del->super_column = $this->unparse_column_name($sc_name, $this->column_type);
$del->timestamp = CassandraUtil::get_time();
$mu->deletion = $del;
$mus[] = $mu;
$client = CassandraConn::get_client();
$mmap = array();
$mmap[$key][$this->column_family] = $mus;
$client->batch_mutate($this->keyspace, $mmap, $this->write_consistency_level);
}
