MINOR: Add topic config to PartitionsSpec (#5523)

Reviewers: Bob Barrett <bob.barrett@outlook.com>, Ismael Juma <ismael@juma.me.uk>

tools/src/main/java/org/apache/kafka/trogdor/workload/PartitionsSpec.java

@@ -39,11 +39,13 @@ public class PartitionsSpec extends Message {
     private final int numPartitions;
     private final short replicationFactor;
     private final Map<Integer, List<Integer>> partitionAssignments;
+    private final Map<String, String> configs;
 
     @JsonCreator
     public PartitionsSpec(@JsonProperty("numPartitions") int numPartitions,
             @JsonProperty("replicationFactor") short replicationFactor,
-            @JsonProperty("partitionAssignments") Map<Integer, List<Integer>> partitionAssignments) {
+            @JsonProperty("partitionAssignments") Map<Integer, List<Integer>> partitionAssignments,
+            @JsonProperty("configs")  Map<String, String> configs) {
         this.numPartitions = numPartitions;
         this.replicationFactor = replicationFactor;
         HashMap<Integer, List<Integer>> partMap = new HashMap<>();
@@ -60,6 +62,11 @@ public class PartitionsSpec extends Message {
             }
         }
         this.partitionAssignments = Collections.unmodifiableMap(partMap);
+        if (configs == null) {
+            this.configs = Collections.emptyMap();
+        } else {
+            this.configs = Collections.unmodifiableMap(new HashMap<>(configs));
+        }
     }
 
     @JsonProperty
@@ -90,15 +97,25 @@ public class PartitionsSpec extends Message {
         return partitionAssignments;
     }
 
+    @JsonProperty
+    public Map<String, String> configs() {
+        return configs;
+    }
+
     public NewTopic newTopic(String topicName) {
+        NewTopic newTopic;
         if (partitionAssignments.isEmpty()) {
             int effectiveNumPartitions = numPartitions <= 0 ?
                 DEFAULT_NUM_PARTITIONS : numPartitions;
             short effectiveReplicationFactor = replicationFactor <= 0 ?
                 DEFAULT_REPLICATION_FACTOR : replicationFactor;
-            return new NewTopic(topicName, effectiveNumPartitions, effectiveReplicationFactor);
+            newTopic = new NewTopic(topicName, effectiveNumPartitions, effectiveReplicationFactor);
         } else {
-            return new NewTopic(topicName, partitionAssignments);
+            newTopic = new NewTopic(topicName, partitionAssignments);
+        }
+        if (!configs.isEmpty()) {
+            newTopic.configs(configs);
         }
+        return newTopic;
     }
 }

tools/src/test/java/org/apache/kafka/trogdor/common/JsonSerializationTest.java

@@ -58,12 +58,12 @@ public class JsonSerializationTest {
         verify(new RoundTripWorkloadSpec(0, 0, null, null, null, null, null, null,
             0, null, null, 0));
         verify(new TopicsSpec());
-        verify(new PartitionsSpec(0, (short) 0, null));
+        verify(new PartitionsSpec(0, (short) 0, null, null));
         Map<Integer, List<Integer>> partitionAssignments = new HashMap<Integer, List<Integer>>();
         partitionAssignments.put(0, Arrays.asList(1, 2, 3));
         partitionAssignments.put(1, Arrays.asList(1, 2, 3));
-        verify(new PartitionsSpec(0, (short) 0, partitionAssignments));
+        verify(new PartitionsSpec(0, (short) 0, partitionAssignments, null));
-        verify(new PartitionsSpec(0, (short) 0, null));
+        verify(new PartitionsSpec(0, (short) 0, null, null));
     }
 
     private <T> void verify(T val1) throws Exception {

tools/src/test/java/org/apache/kafka/trogdor/workload/TopicsSpecTest.java

@@ -26,6 +26,8 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.kafka.trogdor.common.JsonUtil;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
@@ -40,13 +42,13 @@ public class TopicsSpecTest {
     static {
         FOO = new TopicsSpec();
 
-        PARTSA = new PartitionsSpec(3, (short) 3, null);
+        PARTSA = new PartitionsSpec(3, (short) 3, null, null);
         FOO.set("topicA[0-2]", PARTSA);
 
         Map<Integer, List<Integer>> assignmentsB = new HashMap<>();
         assignmentsB.put(0, Arrays.asList(0, 1, 2));
         assignmentsB.put(1, Arrays.asList(2, 3, 4));
-        PARTSB = new PartitionsSpec(0, (short) 0, assignmentsB);
+        PARTSB = new PartitionsSpec(0, (short) 0, assignmentsB, null);
         FOO.set("topicB", PARTSB);
     }
 
@@ -77,4 +79,13 @@ public class TopicsSpecTest {
         assertEquals(Integer.valueOf(1), partsBNumbers.get(1));
         assertEquals(2, partsBNumbers.size());
     }
+
+    @Test
+    public void testPartitionsSpec() throws Exception {
+        String text = "{\"numPartitions\": 5, \"configs\": {\"foo\": \"bar\"}}";
+        PartitionsSpec spec = JsonUtil.JSON_SERDE.readValue(text, PartitionsSpec.class);
+        assertEquals(5, spec.numPartitions());
+        assertEquals("bar", spec.configs().get("foo"));
+        assertEquals(1, spec.configs().size());
+    }
 }