update Esper time on OANDA heartbeat

src/main/java/DebugProcessor.java

@@ -1,3 +1,4 @@
+import com.espertech.esper.client.time.CurrentTimeEvent;
 
 
 public class DebugProcessor implements TickProcessor {
@@ -5,4 +6,7 @@ public class DebugProcessor implements TickProcessor {
 	public void process(TickEvent tick) {
 		System.out.println(tick);
 	}
+
+	public void process(CurrentTimeEvent time) {
+	}
 }

src/main/java/EsperProcessor.java

@@ -181,9 +181,14 @@ public class EsperProcessor implements TickProcessor {
 	 * Send a single TickEvent to Esper.
 	 */
 	public void process(TickEvent tick) {
-		DateTime time = tick.getTime();
-		CurrentTimeEvent timeEvent = new CurrentTimeEvent(time.getMillis());
-		engine.getEPRuntime().sendEvent(timeEvent);
+		process(new CurrentTimeEvent(tick.getTime().getMillis()));
 		engine.getEPRuntime().sendEvent(tick);
 	}
+
+	/**
+	 * Update Esper's internal clock.
+	 */
+	public void process(CurrentTimeEvent timeEvent) {
+		engine.getEPRuntime().sendEvent(timeEvent);
+	}
 }

src/main/java/OANDAHeartbeatEvent.java

@@ -0,0 +1,33 @@
+import org.joda.time.DateTime;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+/**
+ * OANDAHeartbeatEvent is a heartbeat message delivered on the OANDA
+ * stream.
+ *
+ * {"type":"HEARTBEAT","time":"2018-05-27T06:42:33.820251354Z"}
+ */
+public class OANDAHeartbeatEvent {
+    public String type;
+    private DateTime time;
+
+
+    /**
+     * @return the time
+     */
+    public DateTime getTime() {
+        return time;
+    }
+
+    /**
+     * @param time the time to set
+     */
+    public void setTime(DateTime time) {
+        this.time = time;
+    }
+
+    public String toString() {
+        return String.format("OANDAHeartbeatEvent[%s]", getTime());
+    }
+}

src/main/java/OANDAReader.java

@@ -10,6 +10,7 @@ import java.net.URLEncoder;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import com.fasterxml.jackson.datatype.joda.JodaModule;
+import com.espertech.esper.client.time.CurrentTimeEvent;
 
 import javax.net.ssl.HttpsURLConnection;
 
@@ -84,16 +85,19 @@ public class OANDAReader implements TickStreamReader {
 			OANDATickEvent tick;
 			try {
 				tick = mapper.readValue(line, OANDATickEvent.class);
-                // log.info(line);
 				processor.process(tick);
 			} catch (JsonParseException | JsonMappingException e) {
-				log.error("Parsing OANDA data", e);
+				log.error("Parsing OANDA tick", e);
 			} catch (IOException e) {
-				log.error("Parsing OANDA data", e);
+				log.error("Parsing OANDA tick", e);
 			}
 		} else if (line.indexOf ("HEARTBEAT") > -1) {
-			// ignore
-            log.debug(line);
+            try {
+                OANDAHeartbeatEvent beat = mapper.readValue(line, OANDAHeartbeatEvent.class);
+                processor.process(new CurrentTimeEvent(beat.getTime().getMillis()));
+			} catch (IOException e) {
+                log.error("Parsing OANDA heartbeat", e);
+			}
 		} else {
 			log.warn("Unknown type: {}", line);
 		}

src/main/java/OANDATickEvent.java

@@ -1,5 +1,4 @@
 import java.math.BigDecimal;
-import java.util.Date;
 import org.joda.time.DateTime;
 
 import com.fasterxml.jackson.annotation.JsonFormat;

src/main/java/TickProcessor.java

@@ -1,3 +1,6 @@
+import com.espertech.esper.client.time.CurrentTimeEvent;
+
 public interface TickProcessor {
 	public void process(TickEvent tick);
+	public void process(CurrentTimeEvent time);
 }