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package derms.replica2;
import derms.Replica;
import derms.ReplicaManager;
import derms.Request;
import derms.Response;
import derms.util.ThreadPool;
import sun.reflect.generics.reflectiveObjects.NotImplementedException;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.logging.Logger;
public class Replica2 implements Replica {
static final InetSocketAddress announceGroup = new InetSocketAddress("225.5.5.5", 5555);
final City city;
final InetAddress localAddr;
final Resources resources;
final Servers servers;
private final Logger log;
private final ResponderServer responderServer;
private final CoordinatorServer coordinatorServer;
private final ReplicaManager replicaManager;
private final ExecutorService pool;
private boolean alive = false;
public Replica2(City city, ReplicaManager replicaManager) throws IOException {
this.city = city;
this.localAddr = InetAddress.getLocalHost();
this.resources = new Resources();
this.servers = new Servers();
this.log = DermsLogger.getLogger(getClass());
this.replicaManager = replicaManager;
this.pool = Executors.newCachedThreadPool();
try {
this.responderServer = new ResponderServer(city, resources, servers);
} catch (IOException e) {
throw new IOException("Failed to create ResponderServer: "+e.getMessage());
}
log.info("Created ResponderServer");
try {
this.coordinatorServer = new CoordinatorServer(city, resources, servers);
} catch (IOException e) {
throw new IOException("Failed to create CoordinatorServer: "+e.getMessage());
}
log.info("Created CoordinatorServer");
}
@Override
public boolean isAlive() { return alive; }
@Override
public void startProcess() {
try {
pool.execute(new ResourceAvailability.Server(localAddr, resources));
} catch (IOException e) {
String msg = "Failed to start ResourceAvailability Server: "+e.getMessage();
log.severe(msg);
return;
}
try {
pool.execute(new RequestResource.Server(localAddr, resources));
} catch (IOException e) {
log.severe("Failed to start RequestResource Server: "+e.getMessage());
return;
}
try {
pool.execute(new FindResource.Server(localAddr, resources));
} catch (IOException e) {
log.severe("Failed to start FindResource Server: "+e.getMessage());
return;
}
try {
pool.execute(new ReturnResource.Server(localAddr, resources));
} catch (IOException e) {
log.severe("Failed to start ReturnResource Server: "+e.getMessage());
return;
}
try {
pool.execute(new SwapResource.Server(localAddr, resources, servers));
} catch (IOException e) {
log.severe("Failed to start SwapResource Server: "+e.getMessage());
return;
}
try {
pool.execute(new Announcer(announceGroup, localAddr, city));
} catch (IOException e) {
log.severe("Failed to start Announcer: "+e.getMessage());
return;
}
try {
pool.execute(new AnnounceListener(announceGroup, localAddr, servers));
} catch (IOException e) {
log.severe("Failed to start AnnounceListener: "+e.getMessage());
return;
}
log.info("Running");
log.config("Local address is "+localAddr.toString());
alive = true;
log.info(getClass().getSimpleName() + " started.");
}
@Override
public void processRequest(Request request) {
log.info(request.toString());
String status = "";
try {
switch (request.getFunction()) {
case "addResource":
status = addResource(request);
break;
case "removeResource":
status = removeResource(request);
break;
case "listResourceAvailability":
status = listResourceAvailability(request);
break;
case "requestResource":
status = requestResource(request);
break;
case "findResource":
status = findResource(request);
break;
case "returnResource":
status = returnResource(request);
break;
case "swapResource":
status = swapResource(request);
break;
default:
status = "Failure: unknown function '" + request.getFunction() + "'";
}
} catch (Exception e) {
log.warning(e.getMessage());
status = "Failure: " + request.getFunction() + ": " + e.getMessage();
}
Response response = new Response(request, replicaManager.getReplicaId(), status, false); // TODO: isSuccess flag
log.info("Processed request " + request + "; response: " + response);
replicaManager.sendResponseToFE(response);
}
@Override
public void restart() {
shutdown();
startProcess();
}
@Override
public int getId() { return 2; }
public void shutdown() {
log.info("Shutting down...");
ThreadPool.shutdown(pool, log);
alive = false;
log.info("Finished shutting down.");
}
private String addResource(Request request) {
Resource resource = new Resource(
ResourceID.parse(request.getResourceID()),
ResourceType.parse(request.getResourceType()),
request.getDuration());
responderServer.addResource(resource);
return "Successfully added resource " + resource;
}
private String removeResource(Request request) {
try {
responderServer.removeResource(
ResourceID.parse(request.getResourceID()),
request.getDuration());
return "Successfully removed resource " + request.getResourceID();
} catch (NoSuchResourceException e) {
String msg = "Error removing " + request.getResourceID() + ": " + e.getMessage();
log.warning(msg);
return msg;
}
}
private String listResourceAvailability(Request request) {
// TODO
throw new NotImplementedException();
}
private String requestResource(Request request) {
try {
coordinatorServer.requestResource(
CoordinatorID.parse(request.getClientID()),
ResourceID.parse(request.getResourceID()),
request.getDuration());
return "Successfully borrowed " + request.getResourceID();
} catch (NoSuchResourceException | AlreadyBorrowedException | InvalidDurationException |ServerCommunicationError e) {
String msg = "Failed to borrow resource " + request.getResourceID() + ": " + e.getMessage();
log.warning(msg);
return msg;
}
}
private String findResource(Request request) {
// TODO
throw new NotImplementedException();
}
private String returnResource(Request request) {
try {
coordinatorServer.returnResource(
CoordinatorID.parse(request.getClientID()),
ResourceID.parse(request.getResourceID()));
return "Successfully returned resource " + request.getResourceID();
} catch (NoSuchResourceException | NotBorrowedException | ServerCommunicationError e) {
String msg = "Failed to borrow resource " + request.getResourceID() + ": " + e.getMessage();
log.warning(msg);
return msg;
}
}
private String swapResource(Request request) {
try {
coordinatorServer.swapResource(
CoordinatorID.parse(request.getClientID()),
ResourceID.parse(request.getOldResourceID()),
ResourceID.parse(request.getResourceID()));
return "Successfully swapped " + request.getOldResourceID() + " for " + request.getResourceID();
} catch (NoSuchResourceException | ServerCommunicationError e) {
String msg = "Failed to swap " + request.getOldResourceID() + " for " + request.getResourceID() + ": " + e.getMessage();
log.warning(msg);
return msg;
}
}
}
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