From cd247e8d64b2ef0aed7f0afdccd711008cd60fcd Mon Sep 17 00:00:00 2001
From: Marcin Chrzanowski <marcin.j.chrzanowski@gmail.com>
Date: Sun, 12 Jan 2020 22:25:09 +0100
Subject: Add default queries for contacts and cardinality

---
 .../edu/mimuw/cloudatlas/agent/modules/Stanik.java | 22 ++++++++++++++++++++++
 .../mimuw/cloudatlas/agent/modules/StanikTest.java |  9 +++++----
 2 files changed, 27 insertions(+), 4 deletions(-)

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 a428232..6e7d4dc 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
@@ -2,6 +2,7 @@ package pl.edu.mimuw.cloudatlas.agent.modules;
 
 import java.nio.file.Path;
 import java.util.*;
+import java.util.AbstractMap.SimpleImmutableEntry;
 import java.util.Map.Entry;
 
 import pl.edu.mimuw.cloudatlas.agent.messages.*;
@@ -30,6 +31,24 @@ public class Stanik extends Module {
         this.freshnessPeriod = freshnessPeriod;
         this.contactsTimestamp = ValueUtils.currentTime();
         this.contacts = new HashSet<>();
+        setDefaultQueries();
+    }
+
+    private void setDefaultQueries() {
+        String cardinalityQuery = "SELECT sum(cardinality) AS cardinality";
+        String contactsQuery = "SELECT random(5, unfold(contacts)) AS contacts";
+
+        setDefaultQuery("&cardinality", cardinalityQuery);
+        setDefaultQuery("&contacts", contactsQuery);
+    }
+
+    private void setDefaultQuery(String name, String query) {
+        try {
+            ValueQuery queryValue = new ValueQuery(query);
+            queries.put(new Attribute(name), new SimpleImmutableEntry(queryValue, new ValueTime(0l)));
+        } catch (Exception e) {
+            System.out.println("ERROR: failed to compile default query");
+        }
     }
 
     public Stanik(PathName ourPath) {
@@ -90,6 +109,9 @@ public class Stanik extends Module {
         if (ValueUtils.isPrefix(zmi.getPathName(), ourPath)) {
             zmi.getAttributes().addOrChange("owner", new ValueString(ourPath.toString()));
         }
+        if (zmi.getPathName().equals(ourPath)) {
+            zmi.getAttributes().addOrChange("cardinality", new ValueInt(1l));
+        }
         for (ZMI son : zmi.getSons()) {
             addValuesRecursive(son, level + 1);
         }
diff --git a/src/test/java/pl/edu/mimuw/cloudatlas/agent/modules/StanikTest.java b/src/test/java/pl/edu/mimuw/cloudatlas/agent/modules/StanikTest.java
index d16d917..92ba051 100644
--- a/src/test/java/pl/edu/mimuw/cloudatlas/agent/modules/StanikTest.java
+++ b/src/test/java/pl/edu/mimuw/cloudatlas/agent/modules/StanikTest.java
@@ -61,7 +61,7 @@ public class StanikTest {
         assertEquals(new ValueInt(0l), zmi.getAttributes().getOrNull("level"));
         assertEquals(new ValueString("/new"), zmi.getAttributes().getOrNull("owner"));
         Map<Attribute, Entry<ValueQuery, ValueTime>> queries = stateMessage.getQueries();
-        assertEquals(0, TestUtil.iterableSize(queries.keySet()));
+        assertEquals(2, TestUtil.iterableSize(queries.keySet()));
     }
 
     @Test
@@ -127,11 +127,12 @@ public class StanikTest {
 
         StateMessage newReceivedMessage = (StateMessage) executor.messagesToPass.poll();
         AttributesMap actualAttributes = newReceivedMessage.getZMI().findDescendant("/new").getAttributes();
-        assertEquals(6, TestUtil.iterableSize(actualAttributes));
+        assertEquals(7, TestUtil.iterableSize(actualAttributes));
         assertEquals(new ValueInt(1337l), actualAttributes.getOrNull("foo"));
         assertEquals(new ValueString("baz"), actualAttributes.getOrNull("bar"));
         assertEquals(new ValueString("new"), actualAttributes.getOrNull("name"));
         assertEquals(new ValueString("/new"), actualAttributes.getOrNull("owner"));
+        assertEquals(new ValueInt(1l), actualAttributes.getOrNull("cardinality"));
         assertEquals(testTime, actualAttributes.getOrNull("timestamp"));
         assertEquals(new ValueInt(1l), actualAttributes.getOrNull("level"));
     }
@@ -223,7 +224,7 @@ public class StanikTest {
         stanik.handleTyped(message);
 
         HashMap<Attribute, Entry<ValueQuery, ValueTime>> actualQueries = stanik.getQueries();
-        assertEquals(1, TestUtil.iterableSize(actualQueries.keySet()));
+        assertEquals(3, TestUtil.iterableSize(actualQueries.keySet()));
         assertTrue(actualQueries.containsKey(new Attribute("&query")));
         Entry<ValueQuery, ValueTime> timestampedQuery = actualQueries.get(new Attribute("&query"));
         assertEquals(new ValueTime(42l), timestampedQuery.getValue());
@@ -247,7 +248,7 @@ public class StanikTest {
         stanik.handleTyped(otherMessage);
 
         HashMap<Attribute, Entry<ValueQuery, ValueTime>> actualQueries = stanik.getQueries();
-        assertEquals(4, TestUtil.iterableSize(actualQueries.keySet()));
+        assertEquals(6, TestUtil.iterableSize(actualQueries.keySet()));
         assertTrue(actualQueries.containsKey(new Attribute("&query1")));
         assertTrue(actualQueries.containsKey(new Attribute("&query2")));
         assertTrue(actualQueries.containsKey(new Attribute("&query3")));
-- 
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