/**
* Retrieve a sibling by sibling number.
*
* @param integer $i - Sibling number.
* @param integer $r - R-Value. Wait until this many partitions
* have responded before returning to client.
* @return Object.
*/
public function getSibling($i, $r = null)
{
# Use defaults if not specified.
$r = $this->bucket->getR($r);
# Run the request...
$vtag = $this->siblings[$i];
$params = array('r' => $r, 'vtag' => $vtag);
$url = Utils::buildRestPath($this->client, $this->bucket, $this->key, null, $params);
$response = Utils::httpRequest('GET', $url);
# Respond with a new object...
$obj = new Object($this->client, $this->bucket, $this->key);
$obj->jsonize = $this->jsonize;
$obj->populate($response, array(200));
return $obj;
}
/**
* Check if a given key exists in a bucket
*
* @author Edgar Veiga <*****@*****.**>
* @param string $key - The key to check
* @return bool
*/
public function hasKey($key)
{
$url = Utils::buildRestPath($this->client, $this, $key);
$response = Utils::httpRequest('HEAD', $url);
if ($response == null) {
throw new Exception("Error checking if key exists.");
}
$status = $response[0]['http_code'];
if ($status === 200) {
return true;
}
return false;
}
/**
* Check if the Riak server for this Client is alive
*
* @return boolean
*/
public function isAlive()
{
$url = 'http://' . $this->host . ':' . $this->port . '/ping';
$response = Utils::httpRequest('GET', $url);
return $response != null && $response[1] == 'OK';
}
/**
* Run the map/reduce operation
*
* Returns an array of results, or an
* array of Link objects if the last phase is a link phase.
*
* @param integer $timeout - Timeout in seconds.
* @return array()
*/
public function run($timeout = null)
{
$num_phases = count($this->phases);
$linkResultsFlag = false;
# If there are no phases, then just echo the inputs back to the user.
if ($num_phases == 0) {
$this->reduce(array("riak_kv_mapreduce", "reduce_identity"));
$num_phases = 1;
$linkResultsFlag = true;
}
# Convert all phases to associative arrays. Also,
# if none of the phases are accumulating, then set the last one to
# accumulate.
$keep_flag = false;
$query = array();
for ($i = 0; $i < $num_phases; $i++) {
$phase = $this->phases[$i];
if ($i == $num_phases - 1 && !$keep_flag) {
$phase->keep = true;
}
if ($phase->keep) {
$keep_flag = true;
}
$query[] = $phase->to_array();
}
# Add key filters if applicable
if ($this->input_mode == 'bucket' && count($this->key_filters) > 0) {
$this->inputs = array('bucket' => $this->inputs, 'key_filters' => $this->key_filters);
}
# Add index search if applicable
if ($this->input_mode == 'bucket' && count($this->index) > 0) {
$this->inputs = array_merge(array('bucket' => $this->inputs), $this->index);
}
# Construct the job, optionally set the timeout...
$job = array("inputs" => $this->inputs, "query" => $query);
if ($timeout != null) {
$job["timeout"] = $timeout;
}
$content = json_encode($job);
# Do the request...
$url = "http://" . $this->client->host . ":" . $this->client->port . "/" . $this->client->mapred_prefix;
$response = Utils::httpRequest('POST', $url, array('Content-type: application/json'), $content);
$result = json_decode($response[1]);
# If the last phase is NOT a link phase, then return the result.
$linkResultsFlag |= end($this->phases) instanceof LinkPhase;
# If we don't need to link results, then just return.
if (!$linkResultsFlag) {
return $result;
}
# Otherwise, if the last phase IS a link phase, then convert the
# results to Link objects.
$a = array();
foreach ($result as $r) {
$tag = isset($r[2]) ? $r[2] : null;
$link = new Link($r[0], $r[1], $tag);
$link->client = $this->client;
$a[] = $link;
}
return $a;
}
