prepare code changes to support UDP async

src/main/java/org/influxdb/impl/BatchProcessor.java

@@ -29,7 +29,7 @@
 public class BatchProcessor {
 
   private static final Logger LOG = Logger.getLogger(BatchProcessor.class.getName());
-  protected final BlockingQueue<BatchEntry> queue = new LinkedBlockingQueue<>();
+  protected final BlockingQueue<AbstractBatchEntry> queue = new LinkedBlockingQueue<>();
   private final ScheduledExecutorService scheduler;
   final InfluxDBImpl influxDB;
   final int actions;
@@ -107,22 +107,28 @@ public BatchProcessor build() {
     }
   }
 
-  static class BatchEntry {
-    private final Point point;
+  abstract static class AbstractBatchEntry {
+      private final Point point;
+
+      public AbstractBatchEntry(final Point point) {
+        this.point = point;
+      }
+
+      public Point getPoint() {
+        return this.point;
+      }
+  }
+
+  static class HttpBatchEntry extends AbstractBatchEntry {
     private final String db;
     private final String rp;
 
-    public BatchEntry(final Point point, final String db, final String rp) {
-      super();
-      this.point = point;
+    public HttpBatchEntry(final Point point, final String db, final String rp) {
+      super(point);
       this.db = db;
       this.rp = rp;
     }
 
-    public Point getPoint() {
-      return this.point;
-    }
-
     public String getDb() {
       return this.db;
     }
@@ -132,6 +138,19 @@ public String getRp() {
     }
   }
 
+  static class UdpBatchEntry extends AbstractBatchEntry {
+      private final int udpPort;
+
+      public UdpBatchEntry(final Point point, final int udpPort) {
+        super(point);
+        this.udpPort = udpPort;
+      }
+
+      public int getUdpPort() {
+        return this.udpPort;
+      }
+  }
+
   /**
    * Static method to create the Builder for this BatchProcessor.
    *
@@ -168,18 +187,22 @@ void write() {
       }
 
       Map<String, BatchPoints> databaseToBatchPoints = Maps.newHashMap();
-      List<BatchEntry> batchEntries = new ArrayList<>(this.queue.size());
+      List<AbstractBatchEntry> batchEntries = new ArrayList<>(this.queue.size());
       this.queue.drainTo(batchEntries);
 
-      for (BatchEntry batchEntry : batchEntries) {
-        String dbName = batchEntry.getDb();
-        if (!databaseToBatchPoints.containsKey(dbName)) {
-          BatchPoints batchPoints = BatchPoints.database(dbName)
-                                               .retentionPolicy(batchEntry.getRp()).build();
-          databaseToBatchPoints.put(dbName, batchPoints);
+      for (AbstractBatchEntry batchEntry : batchEntries) {
+        if (batchEntry instanceof HttpBatchEntry) {
+            HttpBatchEntry httpBatchEntry = HttpBatchEntry.class.cast(batchEntry);
+            String dbName = httpBatchEntry.getDb();
+            if (!databaseToBatchPoints.containsKey(dbName)) {
+              BatchPoints batchPoints = BatchPoints.database(dbName)
+                                                   .retentionPolicy(httpBatchEntry.getRp()).build();
+              databaseToBatchPoints.put(dbName, batchPoints);
+            }
+            Point point = batchEntry.getPoint();
+            databaseToBatchPoints.get(dbName).point(point);
         }
-        Point point = batchEntry.getPoint();
-        databaseToBatchPoints.get(dbName).point(point);
+
       }
 
       for (BatchPoints batchPoints : databaseToBatchPoints.values()) {
@@ -197,7 +220,7 @@ void write() {
    * @param batchEntry
    *            the batchEntry to write to the cache.
    */
-  void put(final BatchEntry batchEntry) {
+  void put(final AbstractBatchEntry batchEntry) {
     this.queue.add(batchEntry);
     if (this.queue.size() >= this.actions) {
       this.scheduler.submit(new Runnable() {

src/main/java/org/influxdb/impl/InfluxDBImpl.java

@@ -12,7 +12,7 @@
 import org.influxdb.dto.Pong;
 import org.influxdb.dto.Query;
 import org.influxdb.dto.QueryResult;
-import org.influxdb.impl.BatchProcessor.BatchEntry;
+import org.influxdb.impl.BatchProcessor.HttpBatchEntry;
 import okhttp3.Headers;
 import okhttp3.HttpUrl;
 import okhttp3.MediaType;
@@ -180,7 +180,7 @@ public String version() {
   @Override
   public void write(final String database, final String retentionPolicy, final Point point) {
     if (this.batchEnabled.get()) {
-      BatchEntry batchEntry = new BatchEntry(point, database, retentionPolicy);
+      HttpBatchEntry batchEntry = new HttpBatchEntry(point, database, retentionPolicy);
       this.batchProcessor.put(batchEntry);
     } else {
       BatchPoints batchPoints = BatchPoints.database(database)

src/test/java/org/influxdb/InfluxDBTest.java

@@ -170,8 +170,8 @@ public void testWriteStringData() {
     public void testWriteStringDataThroughUDP() {
         String measurement = TestUtils.getRandomMeasurement();
         this.influxDB.write(UDP_PORT, measurement + ",atag=test idle=90,usertime=9,system=1");
-        //write with UDP may be executed on server after query with HTTP. so sleep 1s to handle this case
-        Uninterruptibles.sleepUninterruptibly(1, TimeUnit.SECONDS);
+        //write with UDP may be executed on server after query with HTTP. so sleep 2s to handle this case
+        Uninterruptibles.sleepUninterruptibly(2, TimeUnit.SECONDS);
         Query query = new Query("SELECT * FROM " + measurement + " GROUP BY *", UDP_DATABASE);
         QueryResult result = this.influxDB.query(query);
         Assert.assertFalse(result.getResults().get(0).getSeries().get(0).getTags().isEmpty());

src/test/java/org/influxdb/impl/BatchProcessorTest.java

@@ -25,8 +25,8 @@ public void testSchedulerExceptionHandling() throws InterruptedException, IOExce
         doThrow(new RuntimeException()).when(mockInfluxDB).write(any(BatchPoints.class));
 
         Point point = Point.measurement("cpu").field("6", "").build();
-        BatchProcessor.BatchEntry batchEntry1 = new BatchProcessor.BatchEntry(point, "db1", "");
-        BatchProcessor.BatchEntry batchEntry2 = new BatchProcessor.BatchEntry(point, "db2", "");
+        BatchProcessor.HttpBatchEntry batchEntry1 = new BatchProcessor.HttpBatchEntry(point, "db1", "");
+        BatchProcessor.HttpBatchEntry batchEntry2 = new BatchProcessor.HttpBatchEntry(point, "db2", "");
 
         batchProcessor.put(batchEntry1);
         Thread.sleep(200); // wait for scheduler