/**
* This file is part of CloudML [ http://cloudml.org ]
*
* Copyright (C) 2012 - SINTEF ICT
* Contact: Franck Chauvel <franck.chauvel@sintef.no>
*
* Module: root
*
* CloudML is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* CloudML is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with CloudML. If not, see
* <http://www.gnu.org/licenses/>.
*/
package org.cloudml.mrt;
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.List;
import org.cloudml.codecs.JsonCodec;
import org.cloudml.core.Deployment;
import org.cloudml.core.Provider;
import org.cloudml.core.VM;
import org.cloudml.mrt.cmd.abstracts.Change;
import org.cloudml.mrt.cmd.abstracts.Instruction;
import org.cloudml.mrt.cmd.gen.Extended;
/**
* This is the one who finally execute the command, one by one. It is also the
* only one who knows what exactly each command means. But in the same, it only
* knows the behavioural meaning of a command, without any knowledge about where
* it is from, how it is scheduled, etc.
*
* @author Hui Song
*/
public class CommandExecutor {
ModelRepo repo = null;
public CommandExecutor(ModelRepo repo) {
this.repo = repo;
}
public synchronized String getSnapshotInJson() {
JsonCodec jsonCodec = new JsonCodec();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
jsonCodec.save(repo.getRoot(), baos);
return baos.toString();
}
public synchronized String getSnapshotInString() {
return repo.getRoot().toString();
}
public synchronized void commitModifications(List<String> modifications) {
for (String modi : modifications) {
String[] parsed = modi.split("\\s+");
if ("add".equals(parsed[0])) {
if ("in".equals(parsed[4]) && "root".equals(parsed[5]) && "nodeTypes".equals(parsed[6])) {
// FIXME: We should know which provider is responsible for the new VM we add!
final Provider provider = new Provider("Missing Provider");
repo.getRoot().getProviders().add(provider);
repo.getRoot().getComponents().add(new VM(parsed[3], provider));
}
}
}
}
/**
* The thing that really matters to this method is its "synchronized"
* keywork
*
* @param inst
* @return
*/
public synchronized Object execute(Instruction inst, List<Change> changes) {
int curr = changes.size();
if (inst instanceof Extended) {
if(inst.getAdditional()!=null && !inst.getAdditional().isEmpty()){
Extended extended = (Extended) inst;
if(extended.params == null)
extended.params = new ArrayList<String>();
extended.params.addAll(inst.getAdditional());
}
inst.execute(repo, changes);
return null;
}
Object obj = inst.execute(repo.getRoot(), changes);
for (; curr < changes.size(); curr++) {
changes.get(curr).fromPeer = inst.fromPeer;
}
return obj;
}
void setModelRepo(ModelRepo repo) {
this.repo = repo;
}
}