269 lines
6.9 KiB
C++
269 lines
6.9 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//paragraph [1] Title: [{\Large \bf \begin {center}] [\end {center}}]
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//[TOC] [\tableofcontents]
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[1] Header File of the class ~PregelAlgebra~
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November 2018, J. Mende
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[TOC]
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1 Overview
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This file defines the members of class MessageWrapper
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*/
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#include <cstring>
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#include <StandardTypes.h>
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#include "MessageWrapper.h"
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#include "../PregelContext.h"
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namespace pregel {
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constexpr size_t MessageWrapper::HEADER_SIZE;
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MessageWrapper::MessageWrapper() : body(nullptr),header() {}
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MessageWrapper::~MessageWrapper() {
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if(body != nullptr){
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body->DeleteIfAllowed();
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}
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}
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MessageWrapper::MessageWrapper(MessageWrapper::Header header, Tuple *body)
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: body(body), header(header) {
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if(body != nullptr){
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body->bringToMemory(); // to overcome end of query and
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//messages having native flobs
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}
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}
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template<typename T>
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char* readBin(char* buffer, T& v){
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memcpy(&v, buffer,sizeof(T));
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return buffer + sizeof(T);
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}
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MessageWrapper::Header MessageWrapper::Header::read(char *buffer) {
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Header header;
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char* nb = buffer;
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nb = readBin(nb, header.recipient);
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nb = readBin(nb, header.type);
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nb = readBin(nb, header.length);
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nb = readBin(nb, header.superstep);
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return header;
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}
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MessageWrapper::Header::Header() {}
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MessageWrapper::Header::Header(int destination,
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MessageType messageType,
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unsigned long messageLength,
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int round)
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: recipient(destination),
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type(messageType),
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length(messageLength),
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superstep(round) {
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}
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MessageWrapper::Header
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MessageWrapper::Header::fromTuple(Tuple *body, const int round) {
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int index = PregelContext::get().getAddressIndex();
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auto attribute = (CcInt *) body->GetAttribute(index);
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const int destination = attribute->GetValue();
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return {destination, DATA, 0, round};
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}
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template<typename T>
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char* writeBin(char* buffer, T v){
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memcpy(buffer, &v, sizeof(T));
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return buffer + sizeof(T);
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}
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char *MessageWrapper::Header::write(char *buffer) const {
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char* nb = buffer;
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nb = writeBin(nb, recipient);
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nb = writeBin(nb, type);
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nb = writeBin(nb, length);
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nb = writeBin(nb, superstep);
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return nb;
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}
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char *MessageWrapper::Header::write() const {
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char *buffer = new char[HEADER_SIZE];
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write(buffer);
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return buffer;
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}
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bool MessageWrapper::Header::operator==(
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const MessageWrapper::Header& rhs) const{
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return (recipient == rhs.recipient)
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&& type == rhs.type
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&& superstep == rhs.superstep;
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// && length = rhs.length // only equal affer serialization
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}
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bool equalTuples(Tuple* t1, Tuple* t2){
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if(t1==nullptr && t2==nullptr){
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return true;
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}
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if(t1==nullptr || t2==nullptr){
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return false;
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}
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if(t1->GetNoAttributes() != t2->GetNoAttributes()){
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return false;
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}
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for(int i=0;i<t1->GetNoAttributes(); i++){
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if(t1->GetAttribute(i)->Compare(t2->GetAttribute(i)) != 0){
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return false;
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}
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}
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return true;
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}
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bool MessageWrapper::operator==(const MessageWrapper& rhs) const{
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return header==rhs.header
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&& equalTuples(body, rhs.body);
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}
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Tuple *MessageWrapper::getBody1() const {
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if(body){
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body->IncReference();
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}
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return body;
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}
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void MessageWrapper::setBody1(Tuple *body) {
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if(this->body){
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this->body->DeleteIfAllowed();
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}
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body->IncReference();
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this->body = body;
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this->body->bringToMemory();
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}
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char* tuple2Bin(Tuple* tuple, size_t& buffersize){
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size_t coreSize;
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size_t extensionSize;
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size_t flobSize;
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size_t blocksize = tuple->GetBlockSize(coreSize, extensionSize,
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flobSize);
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// allocate buffer and write flob into it
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char* buffer = new char[blocksize];
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tuple->WriteToBin(buffer, coreSize, extensionSize, flobSize);
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uint32_t tsize = blocksize;
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buffersize = tsize;
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return buffer;
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}
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unsigned long MessageWrapper::serialize(char *&buffer) {
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unsigned long size = HEADER_SIZE;
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size_t bodySize = 0;
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char* bodyBuffer = 0;
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if (header.type == DATA) {
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bodyBuffer = tuple2Bin(body,bodySize);
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header.length = bodySize;
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size += bodySize;
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}
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buffer = new char[size];
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char *offset = header.write(buffer);
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if (header.type == DATA) {
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memcpy(offset,bodyBuffer, bodySize);
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delete[] bodyBuffer;
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}
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return size;
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}
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std::shared_ptr<MessageWrapper>
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MessageWrapper::deserialize(char *buffer, Header header) {
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char *offset = buffer;
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TupleType* tupleType = PregelContext::get().getTupleType();
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Tuple *tuple = new Tuple(tupleType);
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tuple->ReadFromBin(0, offset );
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return std::make_shared<MessageWrapper>(header, tuple);
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}
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int MessageWrapper::getDestination() const {
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return header.recipient;
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}
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void MessageWrapper::setDestination(int destination) {
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header.recipient = destination;
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}
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std::ostream &operator<<(std::ostream &os, const MessageWrapper &wrapper) {
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if (wrapper.getType() != MessageWrapper::MessageType::DATA) {
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os << "non data message:" << " header: " << wrapper.header;
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return os;
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}
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ListExpr messageType;
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nl->ReadFromString(PregelContext::get().getMessageType(), messageType);
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Tuple* tuple = wrapper.getBody1();
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ListExpr toList = tuple->SaveToList(messageType);
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tuple->DeleteIfAllowed();
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os << "data message:" << " body: " << nl->ToString(toList) << " header: "
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<< wrapper.header;
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return os;
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}
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inline std::ostream &
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operator<<(std::ostream &os, MessageWrapper::MessageType value) {
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switch (value) {
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case MessageWrapper::MessageType::DATA :
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return os << "DATA";
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case MessageWrapper::MessageType::EMPTY :
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return os << "EMPTY";
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case MessageWrapper::MessageType::FINISH :
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return os << "FINISH";
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default:
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return os << (int) value;
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}
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}
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std::ostream &
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operator<<(std::ostream &os, const MessageWrapper::Header &header) {
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os << "recipient: " << header.recipient << " type: " << header.type
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<< " length: "
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<< header.length << " superstep: " << header.superstep;
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return os;
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}
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std::shared_ptr<MessageWrapper>
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MessageWrapper::fromTuple(Tuple *tuple, int round) {
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Header header = Header::fromTuple(tuple, round);
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return std::make_shared<MessageWrapper>(header, tuple);
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}
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}
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