From ca2f1ab4a37f0d590d5c116cd1fa7c341c77fad3 Mon Sep 17 00:00:00 2001 From: Marcin Chrzanowski Date: Mon, 30 Dec 2019 22:16:46 +0100 Subject: Implement modular getZoneSet --- .../java/pl/edu/mimuw/cloudatlas/agent/Agent.java | 31 +++- .../pl/edu/mimuw/cloudatlas/agent/EventBus.java | 4 + .../cloudatlas/agent/NewApiImplementation.java | 178 +++++++++++++++++++++ .../cloudatlas/agent/messages/RMIMessage.java | 14 -- .../cloudatlas/agent/messages/RemikMessage.java | 25 +++ .../agent/messages/RequestStateMessage.java | 16 ++ .../edu/mimuw/cloudatlas/agent/modules/Module.java | 6 +- .../pl/edu/mimuw/cloudatlas/agent/modules/RMI.java | 37 ----- .../edu/mimuw/cloudatlas/agent/modules/Remik.java | 54 +++++++ 9 files changed, 308 insertions(+), 57 deletions(-) create mode 100644 src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java delete mode 100644 src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RMIMessage.java create mode 100644 src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RemikMessage.java create mode 100644 src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RequestStateMessage.java delete mode 100644 src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/RMI.java create mode 100644 src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Remik.java (limited to 'src/main/java/pl/edu/mimuw/cloudatlas/agent') 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 392e0a1..52bd395 100644 --- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java +++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java @@ -1,22 +1,45 @@ package pl.edu.mimuw.cloudatlas.agent; +import java.rmi.registry.LocateRegistry; +import java.rmi.registry.Registry; +import java.rmi.server.UnicastRemoteObject; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; +import pl.edu.mimuw.cloudatlas.agent.ApiImplementation; import pl.edu.mimuw.cloudatlas.agent.modules.Module; import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType; import pl.edu.mimuw.cloudatlas.agent.modules.Qurnik; -import pl.edu.mimuw.cloudatlas.agent.modules.RMI; +import pl.edu.mimuw.cloudatlas.agent.modules.Remik; import pl.edu.mimuw.cloudatlas.agent.modules.Stanik; import pl.edu.mimuw.cloudatlas.agent.modules.TimerScheduler; +import pl.edu.mimuw.cloudatlas.api.Api; +import pl.edu.mimuw.cloudatlas.interpreter.Main; +import pl.edu.mimuw.cloudatlas.model.ZMI; public class Agent { + private static EventBus eventBus; + + public static void runRegistry() { + try { + ZMI root = Main.createTestHierarchy2(); + ApiImplementation api = new ApiImplementation(root); + 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 initializeModules() { HashMap modules = new HashMap(); modules.put(ModuleType.TIMER_SCHEDULER, new TimerScheduler(ModuleType.TIMER_SCHEDULER)); - modules.put(ModuleType.RMI, new RMI(ModuleType.RMI)); + modules.put(ModuleType.RMI, new Remik()); modules.put(ModuleType.STATE, new Stanik()); modules.put(ModuleType.QUERY, new Qurnik()); // TODO add modules as we implement them @@ -61,7 +84,8 @@ public class Agent { HashMap executors = initializeExecutors(modules); ArrayList executorThreads = initializeExecutorThreads(executors); - Thread eventBusThread = new Thread(new EventBus(executors)); + eventBus = new EventBus(executors); + Thread eventBusThread = new Thread(eventBus); System.out.println("Initializing event bus"); eventBusThread.start(); @@ -71,5 +95,6 @@ public class Agent { public static void main(String[] args) { runModulesAsThreads(); + runRegistry(); } } diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java index 5b09253..a6d3b2d 100644 --- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java +++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java @@ -20,6 +20,10 @@ public class EventBus implements Runnable { } } + // Allows for testing with a mock EventBus + protected EventBus() { + } + EventBus(HashMap executors) { this.executors = executors; setEventBusReference(); diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java new file mode 100644 index 0000000..4aa5148 --- /dev/null +++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java @@ -0,0 +1,178 @@ +package pl.edu.mimuw.cloudatlas.agent; + +import java.io.PrintStream; + +import java.rmi.RemoteException; + +import java.util.concurrent.CompletableFuture; +import java.util.List; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; +import java.util.regex.Pattern; +import java.util.regex.Matcher; + + +import pl.edu.mimuw.cloudatlas.agent.messages.RequestStateMessage; +import pl.edu.mimuw.cloudatlas.agent.messages.ResponseMessage; +import pl.edu.mimuw.cloudatlas.agent.messages.StateMessage; +import pl.edu.mimuw.cloudatlas.interpreter.Interpreter; +import pl.edu.mimuw.cloudatlas.interpreter.InterpreterException; +import pl.edu.mimuw.cloudatlas.interpreter.Main; +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.PathName; +import pl.edu.mimuw.cloudatlas.model.ValueContact; +import pl.edu.mimuw.cloudatlas.model.Value; +import pl.edu.mimuw.cloudatlas.model.ValueQuery; +import pl.edu.mimuw.cloudatlas.model.ValueSet; +import pl.edu.mimuw.cloudatlas.model.ValueNull; +import pl.edu.mimuw.cloudatlas.model.Type; +import pl.edu.mimuw.cloudatlas.model.TypePrimitive; +import pl.edu.mimuw.cloudatlas.model.ZMI; +import pl.edu.mimuw.cloudatlas.api.Api; + +public class NewApiImplementation implements Api { + private EventBus eventBus; + + public NewApiImplementation(EventBus eventBus) { + this.eventBus = eventBus; + } + + public Set getZoneSet() throws RemoteException { + CompletableFuture responseFuture = new CompletableFuture(); + RequestStateMessage message = new RequestStateMessage("", 0, responseFuture); + try { + eventBus.addMessage(message); + ResponseMessage response = responseFuture.get(); + + if (response.getType() == ResponseMessage.Type.STATE) { + StateMessage stateMessage = (StateMessage) response; + Set zones = new HashSet(); + collectZoneNames(stateMessage.getZMI(), zones); + return zones; + } else { + System.out.println("ERROR: getZoneSet didn't receive a StateMessage"); + throw new Exception("Failed to retrieve zone set"); + } + } catch (Exception e) { + System.out.println("ERROR: exception caught in getZoneSet"); + throw new RemoteException(e.getMessage()); + } + } + + private void collectZoneNames(ZMI zone, Set names) { + names.add(zone.getPathName().toString()); + for (ZMI son : zone.getSons()) { + collectZoneNames(son, names); + } + } + + public AttributesMap getZoneAttributeValues(String zoneName) throws RemoteException { + /* + try { + ZMI zmi = root.findDescendant(new PathName(zoneName)); + return zmi.getAttributes(); + } catch (ZMI.NoSuchZoneException e) { + throw new RemoteException("Zone not found", e); + } + */ + + // placeholder + return new AttributesMap(); + } + + public void installQuery(String name, String queryCode) throws RemoteException { + /* + Pattern queryNamePattern = Pattern.compile("&[a-zA-Z][\\w_]*"); + Matcher matcher = queryNamePattern.matcher(name); + if (!matcher.matches()) { + throw new RemoteException("Invalid query identifier"); + } + try { + ValueQuery query = new ValueQuery(queryCode); + Attribute attributeName = new Attribute(name); + installQueryInHierarchy(root, attributeName, query); + executeAllQueries(root); + } catch (Exception e) { + throw new RemoteException("Failed to install query", e); + } + */ + } + + private void installQueryInHierarchy(ZMI zmi, Attribute queryName, ValueQuery query) { + /* + if (!zmi.getSons().isEmpty()) { + zmi.getAttributes().addOrChange(queryName, query); + for (ZMI son : zmi.getSons()) { + installQueryInHierarchy(son, queryName, query); + } + } + */ + } + + public void uninstallQuery(String queryName) throws RemoteException { + // uninstallQueryInHierarchy(root, new Attribute(queryName)); + } + + private void uninstallQueryInHierarchy(ZMI zmi, Attribute queryName) { + /* + if (!zmi.getSons().isEmpty()) { + zmi.getAttributes().remove(queryName); + for (ZMI son : zmi.getSons()) { + uninstallQueryInHierarchy(son, queryName); + } + } + */ + } + + public void setAttributeValue(String zoneName, String attributeName, Value value) throws RemoteException { + /* + try { + ZMI zmi = root.findDescendant(new PathName(zoneName)); + zmi.getAttributes().addOrChange(new Attribute(attributeName), value); + executeAllQueries(root); + } catch (ZMI.NoSuchZoneException e) { + throw new RemoteException("Zone not found", e); + } + */ + } + + private void executeAllQueries(ZMI zmi) { + /* + if(!zmi.getSons().isEmpty()) { + for(ZMI son : zmi.getSons()) { + executeAllQueries(son); + } + + Interpreter interpreter = new Interpreter(zmi); + for (ValueQuery query : getQueries(zmi)) { + try { + List result = interpreter.interpretProgram(query.getQuery()); + for(QueryResult r : result) { + zmi.getAttributes().addOrChange(r.getName(), r.getValue()); + } + } catch(InterpreterException exception) {} + } + } + */ + } + + private Set getQueries(ZMI zmi) { + Set querySet = new HashSet(); + /* + for (Map.Entry attribute : zmi.getAttributes()) { + if (attribute.getValue().getType().getPrimaryType() == Type.PrimaryType.QUERY) { + querySet.add((ValueQuery) attribute.getValue()); + } + } + */ + + return querySet; + } + + public void setFallbackContacts(Set contacts) throws RemoteException { + // this.contacts = contacts; + } +} diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RMIMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RMIMessage.java deleted file mode 100644 index a8e3afb..0000000 --- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RMIMessage.java +++ /dev/null @@ -1,14 +0,0 @@ -package pl.edu.mimuw.cloudatlas.agent.messages; - -import pl.edu.mimuw.cloudatlas.agent.modules.Module; -import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType; - -public class RMIMessage extends AgentMessage { - public RMIMessage(String messageId, long timestamp) { - super(messageId, ModuleType.RMI, timestamp); - } - - public void callMe(Module module) throws InterruptedException, Module.InvalidMessageType { - module.handleTyped(this); - } -} diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RemikMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RemikMessage.java new file mode 100644 index 0000000..b0300cb --- /dev/null +++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RemikMessage.java @@ -0,0 +1,25 @@ +package pl.edu.mimuw.cloudatlas.agent.messages; + +import pl.edu.mimuw.cloudatlas.agent.modules.Module; +import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType; + +public abstract class RemikMessage extends AgentMessage { + public enum Type { + REQUEST_STATE + } + + private Type type; + + public RemikMessage(String messageId, long timestamp, Type type) { + super(messageId, ModuleType.RMI, timestamp); + this.type = type; + } + + public Type getType() { + return type; + } + + public void callMe(Module module) throws InterruptedException, Module.InvalidMessageType { + module.handleTyped(this); + } +} diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RequestStateMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RequestStateMessage.java new file mode 100644 index 0000000..698aac7 --- /dev/null +++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RequestStateMessage.java @@ -0,0 +1,16 @@ +package pl.edu.mimuw.cloudatlas.agent.messages; + +import java.util.concurrent.CompletableFuture; + +public class RequestStateMessage extends RemikMessage { + CompletableFuture responseFuture; + + public RequestStateMessage(String messageId, long timestamp, CompletableFuture responseFuture) { + super(messageId, timestamp, Type.REQUEST_STATE); + this.responseFuture = responseFuture; + } + + public CompletableFuture getFuture() { + return responseFuture; + } +} diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Module.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Module.java index ba5e1d1..0a934cb 100644 --- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Module.java +++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Module.java @@ -4,8 +4,8 @@ import pl.edu.mimuw.cloudatlas.agent.Executor; import pl.edu.mimuw.cloudatlas.agent.messages.AgentMessage; import pl.edu.mimuw.cloudatlas.agent.messages.TimerSchedulerMessage; import pl.edu.mimuw.cloudatlas.agent.messages.QurnikMessage; +import pl.edu.mimuw.cloudatlas.agent.messages.RemikMessage; import pl.edu.mimuw.cloudatlas.agent.messages.ResponseMessage; -import pl.edu.mimuw.cloudatlas.agent.messages.RMIMessage; import pl.edu.mimuw.cloudatlas.agent.messages.StanikMessage; /* @@ -37,8 +37,8 @@ public abstract class Module { throw new InvalidMessageType("Got a QurnikMessage in module " + moduleType.toString()); } - public void handleTyped(RMIMessage message) throws InterruptedException, InvalidMessageType { - throw new InvalidMessageType("Got an RMIMessage in module " + moduleType.toString()); + public void handleTyped(RemikMessage message) throws InterruptedException, InvalidMessageType { + throw new InvalidMessageType("Got a RemikMessage in module " + moduleType.toString()); } public void handleTyped(StanikMessage message) throws InterruptedException, InvalidMessageType { diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/RMI.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/RMI.java deleted file mode 100644 index 1a86fc7..0000000 --- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/RMI.java +++ /dev/null @@ -1,37 +0,0 @@ -package pl.edu.mimuw.cloudatlas.agent.modules; - -import pl.edu.mimuw.cloudatlas.agent.ApiImplementation; -import pl.edu.mimuw.cloudatlas.agent.messages.AgentMessage; -import pl.edu.mimuw.cloudatlas.agent.messages.RMIMessage; -import pl.edu.mimuw.cloudatlas.api.Api; -import pl.edu.mimuw.cloudatlas.interpreter.Main; -import pl.edu.mimuw.cloudatlas.model.ZMI; - -import java.rmi.registry.LocateRegistry; -import java.rmi.registry.Registry; -import java.rmi.server.UnicastRemoteObject; - -public class RMI extends Module { - public RMI(ModuleType moduleType) { - super(moduleType); - runRegistry(); - } - - public void runRegistry() { - try { - ZMI root = Main.createTestHierarchy2(); - ApiImplementation api = new ApiImplementation(root); - 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 void handleTyped(RMIMessage event) throws InterruptedException { - } -} diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Remik.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Remik.java new file mode 100644 index 0000000..9645d71 --- /dev/null +++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Remik.java @@ -0,0 +1,54 @@ +package pl.edu.mimuw.cloudatlas.agent.modules; + +import java.util.concurrent.CompletableFuture; +import java.util.HashMap; +import java.util.Map; + + +import pl.edu.mimuw.cloudatlas.agent.messages.GetStateMessage; +import pl.edu.mimuw.cloudatlas.agent.messages.RemikMessage; +import pl.edu.mimuw.cloudatlas.agent.messages.RequestStateMessage; +import pl.edu.mimuw.cloudatlas.agent.messages.ResponseMessage; + +/* + * Remik is a cute little module that allows RMI functions to interface with + * agent's asynchronous modules. + */ +public class Remik extends Module { + private Map> awaitingRequests; + private long nextRequestId = 0; + + public Remik() { + super(ModuleType.RMI); + awaitingRequests = new HashMap(); + } + + public void handleTyped(RemikMessage message) throws InvalidMessageType, InterruptedException { + switch (message.getType()) { + case REQUEST_STATE: + handleRequestState((RequestStateMessage) message); + break; + default: + throw new InvalidMessageType("This type of message cannot be handled by Remik"); + } + } + + public void handleTyped(ResponseMessage message) { + CompletableFuture responseFuture = awaitingRequests.get(message.getRequestId()); + + if (responseFuture == null) { + System.out.println("ERROR: Remik got response for nonexistent/finished request"); + } else { + responseFuture.complete(message); + } + } + + private void handleRequestState(RequestStateMessage message) throws InterruptedException { + awaitingRequests.put(nextRequestId, message.getFuture()); + + GetStateMessage getStateMessage = new GetStateMessage("", 0, ModuleType.RMI, nextRequestId); + nextRequestId++; + + sendMessage(getStateMessage); + } +} -- cgit v1.2.3