TMultiplexedProcessor is a Processor allowing
* a single TServer to provide multiple services.
*
* To do so, you instantiate the processor and then register additional
* processors with it, as shown in the following example:
*
*
* $processor = new TMultiplexedProcessor();
*
* processor->registerProcessor(
* "Calculator",
* new \tutorial\CalculatorProcessor(new CalculatorHandler()));
*
* processor->registerProcessor(
* "WeatherReport",
* new \tutorial\WeatherReportProcessor(new WeatherReportHandler()));
*
* $processor->process($protocol, $protocol);
*
*/
class TMultiplexedProcessor {
private $serviceProcessorMap_;
/**
* 'Register' a service with this TMultiplexedProcessor. This
* allows us to broker requests to individual services by using the service
* name to select them at request time.
*
* @param serviceName Name of a service, has to be identical to the name
* declared in the Thrift IDL, e.g. "WeatherReport".
* @param processor Implementation of a service, ususally referred to
* as "handlers", e.g. WeatherReportHandler implementing WeatherReport.Iface.
*/
public function registerProcessor($serviceName, $processor) {
$this->serviceProcessorMap_[$serviceName] = $processor;
}
/**
* This implementation of process performs the following steps:
*
*
* - Read the beginning of the message.
* - Extract the service name from the message.
* - Using the service name to locate the appropriate processor.
* - Dispatch to the processor, with a decorated instance of TProtocol
* that allows readMessageBegin() to return the original Message.
*
*
* @throws TException If the message type is not CALL or ONEWAY, if
* the service name was not found in the message, or if the service
* name was not found in the service map.
*/
public function process(TProtocol $input, TProtocol $output) {
/*
Use the actual underlying protocol (e.g. TBinaryProtocol) to read the
message header. This pulls the message "off the wire", which we'll
deal with at the end of this method.
*/
$input->readMessageBegin($fname, $mtype, $rseqid);
if ($mtype !== TMessageType::CALL && $mtype != TMessageType::ONEWAY) {
throw new TException("This should not have happened!?");
}
// Extract the service name and the new Message name.
if (strpos($fname, TMultiplexedProtocol::SEPARATOR) === false) {
throw new TException("Service name not found in message name: {$fname}. Did you " .
"forget to use a TMultiplexProtocol in your client?");
}
list($serviceName, $messageName) = explode(':', $fname, 2);
if (!array_key_exists($serviceName, $this->serviceProcessorMap_)) {
throw new TException("Service name not found: {$serviceName}. Did you forget " .
"to call registerProcessor()?");
}
// Dispatch processing to the stored processor
$processor = $this->serviceProcessorMap_[$serviceName];
return $processor->process(
new StoredMessageProtocol($input, $messageName, $mtype, $rseqid), $output
);
}
}
/**
* Our goal was to work with any protocol. In order to do that, we needed
* to allow them to call readMessageBegin() and get the Message in exactly
* the standard format, without the service name prepended to the Message name.
*/
class StoredMessageProtocol extends TProtocolDecorator {
private $fname_, $mtype_, $rseqid_;
public function __construct(TProtocol $protocol, $fname, $mtype, $rseqid) {
parent::__construct($protocol);
$this->fname_ = $fname;
$this->mtype_ = $mtype;
$this->rseqid_ = $rseqid;
}
public function readMessageBegin(&$name, &$type, &$seqid) {
$name = $this->fname_;
$type = $this->mtype_;
$seqid = $this->rseqid_;
}
}