public function __construct(AvroProtocol $local_protocol)
{
$this->local_protocol = $local_protocol;
$this->local_hash = $local_protocol->md5();
$this->protocol_cache[$this->local_hash] = $this->local_protocol;
$this->handshake_responder_writer = new AvroIODatumWriter(AvroSchema::parse(HANDSHAKE_RESPONSE_SCHEMA_JSON));
$this->handshake_responder_reader = new AvroIODatumReader(AvroSchema::parse(HANDSHAKE_REQUEST_SCHEMA_JSON));
$this->meta_writer = new AvroIODatumWriter(AvroSchema::parse('{"type": "map", "values": "bytes"}'));
$this->meta_reader = new AvroIODatumReader(AvroSchema::parse('{"type": "map", "values": "bytes"}'));
$this->system_error_schema = AvroSchema::parse('["string"]');
}
