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package pl.edu.mimuw.cloudatlas.agent.modules;
import java.util.List;
import java.util.LinkedList;
import java.util.Map.Entry;
import pl.edu.mimuw.cloudatlas.agent.messages.GetStateMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.QurnikMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.ResponseMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.RunQueriesMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.StateMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.UpdateAttributesMessage;
import pl.edu.mimuw.cloudatlas.interpreter.Interpreter;
import pl.edu.mimuw.cloudatlas.interpreter.InterpreterException;
import pl.edu.mimuw.cloudatlas.interpreter.QueryResult;
import pl.edu.mimuw.cloudatlas.model.Attribute;
import pl.edu.mimuw.cloudatlas.model.AttributesMap;
import pl.edu.mimuw.cloudatlas.model.AttributesUtil;
import pl.edu.mimuw.cloudatlas.model.PathName;
import pl.edu.mimuw.cloudatlas.model.TypePrimitive;
import pl.edu.mimuw.cloudatlas.model.Value;
import pl.edu.mimuw.cloudatlas.model.ValueQuery;
import pl.edu.mimuw.cloudatlas.model.ValueString;
import pl.edu.mimuw.cloudatlas.model.ValueTime;
import pl.edu.mimuw.cloudatlas.model.ValueUtils;
import pl.edu.mimuw.cloudatlas.model.ZMI;
public class Qurnik extends Module {
public Qurnik() {
super(ModuleType.QUERY);
}
@Override
public void handleTyped(QurnikMessage message) throws InterruptedException, InvalidMessageType {
switch (message.getType()) {
case RUN_QUERIES:
handleRunQueries((RunQueriesMessage) message);
break;
default:
throw new InvalidMessageType("This type of message cannot be handled by Qurnik");
}
}
@Override
public void handleTyped(ResponseMessage message) throws InterruptedException, InvalidMessageType {
switch (message.getType()) {
case STATE:
runQueriesOnState((StateMessage) message);
break;
default:
throw new InvalidMessageType("This type of message cannot be handled by Qurnik");
}
}
private void handleRunQueries(RunQueriesMessage message) throws InterruptedException {
GetStateMessage getStateMessage = new GetStateMessage("", 0, ModuleType.QUERY, 0);
sendMessage(getStateMessage);
}
private void runQueriesOnState(StateMessage message) throws InterruptedException {
List<ValueQuery> queries = new LinkedList();
for (Entry<ValueQuery, ValueTime> timestampedQuery : message.getQueries().values()) {
queries.add(timestampedQuery.getKey());
}
executeAllQueries(message.getZMI(), queries, PathName.ROOT);
}
private void executeAllQueries(ZMI zmi, List<ValueQuery> queries, PathName currentPath) throws InterruptedException {
if(!zmi.getSons().isEmpty()) {
for(ZMI son : zmi.getSons()) {
Value sonName = son.getAttributes().getOrNull("name");
if (ValueUtils.valueNonNullOfType(sonName, TypePrimitive.STRING)) {
String sonNameString = ((ValueString) sonName).getValue();
executeAllQueries(son, queries, currentPath.levelDown(sonNameString));
} else {
System.out.println("ERROR: zone without a name attribute found while executing queries");
}
}
Interpreter interpreter = new Interpreter(zmi);
AttributesMap newAttributes = new AttributesMap();
for (ValueQuery query : queries) {
try {
List<QueryResult> result = interpreter.interpretProgram(query.getQuery());
for(QueryResult r : result) {
newAttributes.addOrChange(r.getName(), r.getValue());
}
} catch(InterpreterException exception) {
System.out.println("ERROR: thrown while running interpreter: " + exception.getMessage());
}
}
if (!currentPath.toString().equals("/")) {
newAttributes.add("name", new ValueString(currentPath.getSingletonName()));
}
long currentTime = System.currentTimeMillis();
newAttributes.add("timestamp", new ValueTime(currentTime));
AttributesUtil.transferAttributes(newAttributes, zmi.getAttributes());
UpdateAttributesMessage message = new UpdateAttributesMessage("", currentTime, currentPath.toString(), newAttributes);
sendMessage(message);
}
}
}
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