diff options
Diffstat (limited to 'src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java')
| -rw-r--r-- | src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java | 278 |
1 files changed, 8 insertions, 270 deletions
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java index 7f2ee1f..690198b 100644 --- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java +++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java @@ -1,281 +1,19 @@ package pl.edu.mimuw.cloudatlas.agent; -import java.net.Inet4Address; -import java.net.InetAddress; -import java.net.SocketException; -import java.net.UnknownHostException; -import java.rmi.registry.LocateRegistry; -import java.rmi.registry.Registry; -import java.rmi.server.UnicastRemoteObject; -import java.util.List; -import java.util.ArrayList; -import java.util.HashMap; -import java.util.HashSet; -import java.util.Iterator; -import java.util.Map; -import java.util.Random; -import java.util.Set; -import java.util.concurrent.CompletableFuture; -import java.util.function.Supplier; - -import pl.edu.mimuw.cloudatlas.agent.NewApiImplementation; -import pl.edu.mimuw.cloudatlas.agent.messages.*; -import pl.edu.mimuw.cloudatlas.agent.modules.*; -import pl.edu.mimuw.cloudatlas.agent.modules.Module; -import pl.edu.mimuw.cloudatlas.api.Api; -import pl.edu.mimuw.cloudatlas.interpreter.Main; -import pl.edu.mimuw.cloudatlas.model.PathName; -import pl.edu.mimuw.cloudatlas.model.Value; -import pl.edu.mimuw.cloudatlas.model.ValueContact; -import pl.edu.mimuw.cloudatlas.model.ValueSet; -import pl.edu.mimuw.cloudatlas.model.ZMI; - public class Agent { - private static EventBus eventBus; - private static GossipGirlStrategies.ZoneSelectionStrategy zoneSelectionStrategy; - private static GossipGirlStrategies gossipGirlStrategies; - private static Random random = new Random(); - - public static void runRegistry() { - try { - NewApiImplementation api = new NewApiImplementation(eventBus); - Api apiStub = - (Api) UnicastRemoteObject.exportObject(api, 0); - Registry registry = LocateRegistry.getRegistry(); - registry.rebind("Api", apiStub); - System.out.println("Agent: api bound"); - } catch (Exception e) { - System.err.println("Agent registry initialization exception:"); - e.printStackTrace(); - } - } - - public static HashMap<ModuleType, Module> initializeModules() throws UnknownHostException, SocketException, NullPointerException { - HashMap<ModuleType, Module> modules = new HashMap<ModuleType, Module>(); - modules.put(ModuleType.TIMER_SCHEDULER, new TimerScheduler(ModuleType.TIMER_SCHEDULER)); - modules.put(ModuleType.RMI, new Remik()); - Long freshnessPeriod = Long.getLong("freshness_period"); - modules.put(ModuleType.STATE, new Stanik(freshnessPeriod)); - modules.put(ModuleType.QUERY, new Qurnik()); - modules.put(ModuleType.GOSSIP, new GossipGirl()); - - Integer port = Integer.getInteger("UDUPServer.port"); - Integer timeout = Integer.getInteger("UDUPServer.timeout"); - Integer bufsize = Integer.getInteger("UDUPServer.bufsize"); - InetAddress serverAddr = InetAddress.getByName(System.getProperty("UDUPServer.hostname")); - UDUPServer server = new UDUPServer(serverAddr, port, bufsize); - modules.put(ModuleType.UDP, new UDUP(port, timeout, bufsize, server)); - return modules; - } - - public static HashMap<ModuleType, Executor> initializeExecutors( - HashMap<ModuleType, Module> modules) { - HashMap<ModuleType, Executor> executors = new HashMap<ModuleType, Executor>(); - - for (Map.Entry<ModuleType, Module> moduleEntry : modules.entrySet()) { - Module module = moduleEntry.getValue(); - Executor executor = new Executor(module); - executors.put(moduleEntry.getKey(), executor); - } - - return executors; - } - - public static ArrayList<Thread> initializeExecutorThreads(HashMap<ModuleType, Executor> executors) { - ArrayList<Thread> executorThreads = new ArrayList<Thread>(); - - for (Map.Entry<ModuleType, Executor> executorEntry : executors.entrySet()) { - Thread thread = new Thread(executorEntry.getValue()); - thread.setDaemon(true); - System.out.println("Initializing executor " + executorEntry.getKey()); - thread.start(); - executorThreads.add(thread); - } - - return executorThreads; - } - - public static void closeExecutors(ArrayList<Thread> executorThreads) { - for (Thread executorThread : executorThreads) { - executorThread.interrupt(); - } - } - - public static void runModulesAsThreads() { - HashMap<ModuleType, Module> modules = null; - - try { - modules = initializeModules(); - } catch (UnknownHostException | SocketException e) { - System.out.println("Module initialization failed"); - e.printStackTrace(); - return; - } - - HashMap<ModuleType, Executor> executors = initializeExecutors(modules); - ArrayList<Thread> executorThreads = initializeExecutorThreads(executors); - eventBus = new EventBus(executors); - Thread UDUPServerThread = new Thread(((UDUP) modules.get(ModuleType.UDP)).getServer()); - Thread eventBusThread = new Thread(eventBus); - System.out.println("Initializing event bus"); - eventBusThread.start(); - UDUPServerThread.start(); - } - - private static void initZones() { - try { - ZMI root = Main.createTestHierarchy2(); - addZoneAndChildren(root, new PathName("")); - System.out.println("Initialized with test hierarchy"); - } catch (Exception e) { - System.out.println("ERROR: failed to create test hierarchy"); - } - } - private static void startQueries(long queriesPeriod) { - Supplier<TimerScheduledTask> taskSupplier = () -> - new TimerScheduledTask() { - public void run() { - try { - sendMessage(new RunQueriesMessage("", 0)); - } catch (InterruptedException e) { - System.out.println("Interrupted while triggering queries"); - } - } - }; - - startRecursiveTask(taskSupplier, queriesPeriod); - } - - private static void startGossip(long gossipPeriod) { - Supplier<TimerScheduledTask> taskSupplier = () -> - new TimerScheduledTask() { - public void run() { - try { - System.out.println("INFO: initiating gossip"); - PathName gossipLevel = gossipGirlStrategies.selectStrategy(zoneSelectionStrategy); - ValueContact contact = selectContactFromLevel(gossipLevel); - if (contact != null) { - System.out.println("INFO: found a contact " + contact.toString()); - InitiateGossipMessage message = new InitiateGossipMessage("", 0, new PathName("/uw/violet07"), contact); - sendMessage(message); - } else { - System.out.println("DEBUG: couldn't find contact for gossip"); - } - } catch (InterruptedException e) { - System.out.println("Interrupted while initiating gossip"); - } catch (Exception e) { - System.out.println("ERROR: something happened " + e.toString()); - } - } - }; - - startRecursiveTask(taskSupplier, gossipPeriod); - } - - private static ValueContact selectContactFromLevel(PathName path) throws Exception { - CompletableFuture<ResponseMessage> responseFuture = new CompletableFuture(); - eventBus.addMessage(new RequestStateMessage("", 0, responseFuture)); - StateMessage response = (StateMessage) responseFuture.get(); - ZMI root = response.getZMI(); - List<ZMI> siblings = getSiblings(root, path); - filterEmptyContacts(siblings); - if (siblings.isEmpty()) { - return selectFallbackContact(); - } - ZMI zmi = selectZMI(siblings); - ValueSet contactsValue = (ValueSet) zmi.getAttributes().getOrNull("contacts"); - Set<Value> valueSet = contactsValue.getValue(); - return selectContactFromSet(valueSet); - } - - private static ValueContact selectFallbackContact() throws Exception { - return null; - } - - private static ZMI selectZMI(List<ZMI> zmis) throws Exception { - int i = random.nextInt(zmis.size()); - for (ZMI zmi : zmis) { - if (i == 0) { - return zmi; - } - i--; - } - System.out.println("ERROR: empty list passed to selectZMI"); - throw new Exception("empty list passed to selectZMI"); - } - - private static ValueContact selectContactFromSet(Set<Value> contacts) throws Exception { - int i = random.nextInt(contacts.size()); - for (Value contact : contacts) { - if (i == 0) { - return (ValueContact) contact; - } - i--; - } - System.out.println("ERROR: empty list passed to selectContactFromSet"); - throw new Exception("empty list passed to selectContactFromSet"); - } - - private static List<ZMI> getSiblings(ZMI root, PathName path) { - try { - List<ZMI> siblingsAndI = root.findDescendant(path).getFather().getSons(); - List<ZMI> siblings = new ArrayList(); - for (ZMI siblingOrI : siblingsAndI) { - if (!siblingOrI.getPathName().equals(path)) { - siblings.add(siblingOrI); - } - } - return siblings; - } catch (ZMI.NoSuchZoneException e) { - System.out.println("ERROR: didn't find path when looking for siblings"); - return new ArrayList(); - } - } - - private static void filterEmptyContacts(List<ZMI> zmis) { - Iterator<ZMI> iterator = zmis.iterator(); - while (iterator.hasNext()) { - ZMI zmi = iterator.next(); - ValueSet contacts = (ValueSet) zmi.getAttributes().getOrNull("contacts"); - if (contacts == null || contacts.isNull() || contacts.isEmpty()) { - iterator.remove(); - } - } - } - - private static void startRecursiveTask(Supplier<TimerScheduledTask> taskSupplier, long period) { - TimerScheduledTask timerTask = new RecursiveScheduledTask(period, taskSupplier); + public static void main(String[] args) { + AgentConfig agentConfig = new AgentConfig(); - try { - eventBus.addMessage(new TimerSchedulerMessage("", 0, "", period, 0, timerTask)); - } catch (InterruptedException e) { - System.out.println("Interrupted while starting queries"); - } - } + agentConfig.runModulesAsThreads(); + agentConfig.runRegistry(); - private static void addZoneAndChildren(ZMI zmi, PathName pathName) { - try { - UpdateAttributesMessage message = new UpdateAttributesMessage("", 0, pathName.toString(), zmi.getAttributes()); - eventBus.addMessage(message); - for (ZMI son : zmi.getSons()) { - addZoneAndChildren(son, pathName.levelDown(son.getAttributes().getOrNull("name").toString())); - } - } catch (Exception e) { - System.out.println("ERROR: failed to add zone"); - } - } - - public static void main(String[] args) { - zoneSelectionStrategy = GossipGirlStrategies.ZoneSelectionStrategy.ROUND_ROBIN_SAME_FREQ; - gossipGirlStrategies = new GossipGirlStrategies(new PathName("/uw/violet07")); - runModulesAsThreads(); - runRegistry(); - initZones(); + HierarchyConfig hierarchyConfig = new HierarchyConfig(agentConfig.getEventBus()); + hierarchyConfig.initZones(); // TODO: make query period confiurable with config file and from tests Long queryPeriod = Long.getLong("query_period"); - startQueries(queryPeriod); + hierarchyConfig.startQueries(queryPeriod); Long gossipPeriod = Long.getLong("gossip_period"); - startGossip(gossipPeriod); + hierarchyConfig.startGossip(gossipPeriod); } } |