Merge pull request #83 from m-chrzan/remik

Use new modular architecture when implementing the RMI API

1 files changed, 143 insertions, 0 deletions

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..def1d72
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java
@@ -0,0 +1,143 @@
+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.AbstractMap.SimpleImmutableEntry;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Map.Entry;
+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.SetAttributeMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.StateMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.UpdateQueriesMessage;
+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.ValueNull;
+import pl.edu.mimuw.cloudatlas.model.ValueQuery;
+import pl.edu.mimuw.cloudatlas.model.ValueSet;
+import pl.edu.mimuw.cloudatlas.model.ValueTime;
+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<String> getZoneSet() throws RemoteException {
+        CompletableFuture<ResponseMessage> 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<String> zones = new HashSet<String>();
+                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<String> names) {
+        names.add(zone.getPathName().toString());
+        for (ZMI son : zone.getSons()) {
+            collectZoneNames(son, names);
+        }
+    }
+
+    public AttributesMap getZoneAttributeValues(String zoneName) throws RemoteException {
+        CompletableFuture<ResponseMessage> 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;
+                return stateMessage.getZMI().findDescendant(zoneName).getAttributes();
+            } 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());
+        }
+    }
+
+    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);
+            ValueTime timestamp = new ValueTime(System.currentTimeMillis());
+            Map<Attribute, Entry<ValueQuery, ValueTime>> queries = new HashMap();
+            queries.put(attributeName, new SimpleImmutableEntry(query, timestamp));
+            UpdateQueriesMessage message = new UpdateQueriesMessage("", 0, queries);
+            eventBus.addMessage(message);
+        } catch (Exception e) {
+            throw new RemoteException("Failed to install query", e);
+        }
+    }
+
+    public void uninstallQuery(String queryName) throws RemoteException {
+        try {
+            Attribute attributeName = new Attribute(queryName);
+            ValueTime timestamp = new ValueTime(System.currentTimeMillis());
+            Map<Attribute, Entry<ValueQuery, ValueTime>> queries = new HashMap();
+            queries.put(attributeName, new SimpleImmutableEntry(null, timestamp));
+            UpdateQueriesMessage message = new UpdateQueriesMessage("", 0, queries);
+            eventBus.addMessage(message);
+        } catch (Exception e) {
+            System.out.println("ERROR: failed to remove query");
+            throw new RemoteException("Failed to uninstall query", e);
+        }
+    }
+
+    public void setAttributeValue(String zoneName, String attributeName, Value value) throws RemoteException {
+        try {
+            SetAttributeMessage message = new SetAttributeMessage("", 0, zoneName, new Attribute(attributeName), value, new ValueTime(System.currentTimeMillis()));
+            eventBus.addMessage(message);
+        } catch (Exception e) {
+            System.out.println("ERROR: failed to set attribute");
+            throw new RemoteException("Failed to set attribute", e);
+        }
+    }
+
+    public void setFallbackContacts(Set<ValueContact> contacts) throws RemoteException {
+        // this.contacts = contacts;
+    }
+}