/**
* serialize the 'properties' attribute (a dictionary) into the
* raw bytes making up a set of property flags and a property
* list, suitable for putting into a content frame header.
*/
public function serialize_properties()
{
$shift = 15;
$flag_bits = 0;
$flags = array();
$raw_bytes = new PhpAmqpLib_Wire_AMQPWriter();
foreach ($this->prop_types as $key => $proptype) {
if (isset($this->properties[$key])) {
$val = $this->properties[$key];
} else {
$val = null;
}
if ($val != null) {
if ($shift == 0) {
$flags[] = $flag_bits;
$flag_bits = 0;
$shift = 15;
}
$flag_bits |= 1 << $shift;
if ($proptype != "bit") {
$raw_bytes->{'write_' . $proptype}($val);
}
}
$shift -= 1;
}
$flags[] = $flag_bits;
$result = new PhpAmqpLib_Wire_AMQPWriter();
foreach ($flags as $flag_bits) {
$result->write_short($flag_bits);
}
$result->write($raw_bytes->getvalue());
return $result->getvalue();
}
/**
* Sends a heartbeat message
*/
protected function write_heartbeat()
{
$pkt = new PhpAmqpLib_Wire_AMQPWriter();
$pkt->write_octet(8);
$pkt->write_short(0);
$pkt->write_long(0);
$pkt->write_octet(0xce);
$this->write($pkt->getvalue());
}
/**
* Serializes the 'properties' attribute (a dictionary) into the
* raw bytes making up a set of property flags and a property
* list, suitable for putting into a content frame header.
*
* @return string
* @todo Inject the PhpAmqpLib_Wire_AMQPWriter to make the method easier to test
*/
public function serialize_properties()
{
if (!empty($this->serialized_properties)) {
return $this->serialized_properties;
}
$shift = 15;
$flag_bits = 0;
$flags = array();
$raw_bytes = new PhpAmqpLib_Wire_AMQPWriter();
foreach ($this->prop_types as $key => $prototype) {
$val = isset($this->properties[$key]) ? $this->properties[$key] : null;
// Very important: PHP type eval is weak, use the === to test the
// value content. Zero or false value should not be removed
if ($val === null) {
$shift -= 1;
continue;
}
if ($shift === 0) {
$flags[] = $flag_bits;
$flag_bits = 0;
$shift = 15;
}
$flag_bits |= 1 << $shift;
if ($prototype != 'bit') {
$raw_bytes->{'write_' . $prototype}($val);
}
$shift -= 1;
}
$flags[] = $flag_bits;
$result = new PhpAmqpLib_Wire_AMQPWriter();
foreach ($flags as $flag_bits) {
$result->write_short($flag_bits);
}
$result->write($raw_bytes->getvalue());
$this->serialized_properties = $result->getvalue();
return $this->serialized_properties;
}
/**
* Returns a new PhpAmqpLib_Wire_AMQPWriter or mutates the provided $pkt
*
* @param string $channel
* @param int $class_id
* @param int $weight
* @param int $body_size
* @param string $packed_properties
* @param string $body
* @param PhpAmqpLib_Wire_AMQPWriter $pkt
* @return PhpAmqpLib_Wire_AMQPWriter
*/
public function prepare_content($channel, $class_id, $weight, $body_size, $packed_properties, $body, $pkt = null)
{
if (empty($pkt)) {
$pkt = new PhpAmqpLib_Wire_AMQPWriter();
}
// Content already prepared ?
$key_cache = sprintf('%s|%s|%s|%s', $channel, $packed_properties, $class_id, $weight);
if (!isset($this->prepare_content_cache[$key_cache])) {
$w = new PhpAmqpLib_Wire_AMQPWriter();
$w->write_octet(2);
$w->write_short($channel);
$w->write_long(mb_strlen($packed_properties, 'ASCII') + 12);
$w->write_short($class_id);
$w->write_short($weight);
$this->prepare_content_cache[$key_cache] = $w->getvalue();
if (count($this->prepare_content_cache) > $this->prepare_content_cache_max_size) {
reset($this->prepare_content_cache);
$old_key = key($this->prepare_content_cache);
unset($this->prepare_content_cache[$old_key]);
}
}
$pkt->write($this->prepare_content_cache[$key_cache]);
$pkt->write_longlong($body_size);
$pkt->write($packed_properties);
$pkt->write_octet(0xce);
// memory efficiency: walk the string instead of biting it. good for very large packets (close in size to memory_limit setting)
$position = 0;
$bodyLength = mb_strlen($body, 'ASCII');
while ($position < $bodyLength) {
$payload = mb_substr($body, $position, $this->frame_max - 8, 'ASCII');
$position += $this->frame_max - 8;
$pkt->write_octet(3);
$pkt->write_short($channel);
$pkt->write_long(mb_strlen($payload, 'ASCII'));
$pkt->write($payload);
$pkt->write_octet(0xce);
}
return $pkt;
}
