Merge pull request #78 from m-chrzan/qurnik

Run queries with Qurnik

7 files changed, 174 insertions, 16 deletions

diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/QurnikMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/QurnikMessage.java
new file mode 100644
index 0000000..0161a37
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/QurnikMessage.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 QurnikMessage extends AgentMessage {
+    public enum Type {
+        RUN_QUERIES
+    }
+
+    private Type type;
+
+    public QurnikMessage(String messageId, long timestamp, Type type) {
+        super(messageId, ModuleType.QUERY, 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/RunQueriesMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RunQueriesMessage.java
new file mode 100644
index 0000000..35f7819
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RunQueriesMessage.java
@@ -0,0 +1,9 @@
+package pl.edu.mimuw.cloudatlas.agent.messages;
+
+import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType;
+
+public class RunQueriesMessage extends QurnikMessage {
+    public RunQueriesMessage(String messageId, long timestamp) {
+        super(messageId, timestamp, Type.RUN_QUERIES);
+    }
+}
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 d0bf083..ba5e1d1 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
@@ -3,6 +3,7 @@ package pl.edu.mimuw.cloudatlas.agent.modules;
 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.ResponseMessage;
 import pl.edu.mimuw.cloudatlas.agent.messages.RMIMessage;
 import pl.edu.mimuw.cloudatlas.agent.messages.StanikMessage;
@@ -32,6 +33,10 @@ public abstract class Module {
         throw new InvalidMessageType("Got a TimerSchedulerMessage in module " + moduleType.toString());
     }
 
+    public void handleTyped(QurnikMessage message) throws InterruptedException, InvalidMessageType {
+        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());
     }
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Qurnik.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Qurnik.java
new file mode 100644
index 0000000..9b7268a
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Qurnik.java
@@ -0,0 +1,105 @@
+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);
+        }
+    }
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Stanik.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Stanik.java
index e8721b3..4694219 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Stanik.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Stanik.java
@@ -12,6 +12,7 @@ import pl.edu.mimuw.cloudatlas.agent.messages.UpdateAttributesMessage;
 import pl.edu.mimuw.cloudatlas.agent.messages.UpdateQueriesMessage;
 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.Type;
 import pl.edu.mimuw.cloudatlas.model.TypePrimitive;
@@ -67,7 +68,7 @@ public class Stanik extends Module {
             ZMI zone = hierarchy.findDescendant(message.getPathName());
             AttributesMap attributes = zone.getAttributes();
             if (valueLower(attributes.get("timestamp"), message.getAttributes().get("timestamp"))) {
-                transferAttributes(message.getAttributes(), attributes);
+                AttributesUtil.transferAttributes(message.getAttributes(), attributes);
             } else {
                 System.out.println("DEBUG: not applying update with older attributes");
             }
@@ -127,21 +128,6 @@ public class Stanik extends Module {
         return value != null && !value.isNull() && value.getType().isCompatible(type);
     }
 
-    private void transferAttributes(AttributesMap fromAttributes, AttributesMap toAttributes) {
-        Iterator<Entry<Attribute, Value>> iterator = toAttributes.iterator();
-        while (iterator.hasNext()) {
-            Entry<Attribute, Value> entry = iterator.next();
-            Attribute attribute = entry.getKey();
-            Value newValue = fromAttributes.getOrNull(attribute);
-            if (newValue == null) {
-                iterator.remove();
-            }
-        }
-        for (Entry<Attribute, Value> entry : fromAttributes) {
-            toAttributes.addOrChange(entry.getKey(), entry.getValue());
-        }
-    }
-
     private void addMissingZones(PathName path) {
         try {
             if (!hierarchy.descendantExists(path)) {
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/model/AttributesUtil.java b/src/main/java/pl/edu/mimuw/cloudatlas/model/AttributesUtil.java
new file mode 100644
index 0000000..cd2ae91
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/model/AttributesUtil.java
@@ -0,0 +1,21 @@
+package pl.edu.mimuw.cloudatlas.model;
+
+import java.util.Iterator;
+import java.util.Map.Entry;
+
+public class AttributesUtil {
+    public static void transferAttributes(AttributesMap fromAttributes, AttributesMap toAttributes) {
+        Iterator<Entry<Attribute, Value>> iterator = toAttributes.iterator();
+        while (iterator.hasNext()) {
+            Entry<Attribute, Value> entry = iterator.next();
+            Attribute attribute = entry.getKey();
+            Value newValue = fromAttributes.getOrNull(attribute);
+            if (newValue == null) {
+                iterator.remove();
+            }
+        }
+        for (Entry<Attribute, Value> entry : fromAttributes) {
+            toAttributes.addOrChange(entry.getKey(), entry.getValue());
+        }
+    }
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueUtils.java b/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueUtils.java
new file mode 100644
index 0000000..01a45b5
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueUtils.java
@@ -0,0 +1,7 @@
+package pl.edu.mimuw.cloudatlas.model;
+
+public class ValueUtils {
+    public static boolean valueNonNullOfType(Value value, Type type) {
+        return value != null && !value.isNull() && value.getType().isCompatible(type);
+    }
+}