1 files changed, 26 insertions, 0 deletions
diff --git a/container-search/src/main/java/com/yahoo/fs4/PingPacket.java b/container-search/src/main/java/com/yahoo/fs4/PingPacket.java
new file mode 100644
index 00000000000..7c1f8df1101
--- /dev/null
+++ b/container-search/src/main/java/com/yahoo/fs4/PingPacket.java
@@ -0,0 +1,26 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.fs4;
+
+import java.nio.ByteBuffer;
+
+/**
+ * A ping packet for FS4. This packet has no data. It maps to
+ * PCODE_MONITORQUERY the C++ implementation of the protocol.
+ *
+ * @author Steinar Knutsen
+ */
+public class PingPacket extends BasicPacket {
+
+    public int getCode() { return 220; }
+
+    public void encodeBody(ByteBuffer buffer) {
+        buffer.putInt(MQF_QFLAGS);
+        buffer.putInt(MQFLAG_REPORT_ACTIVEDOCS);
+    }
+
+    /** feature bits, taken from searchlib/common/transport.h */
+    static final int MQF_QFLAGS = 0x00000002;
+
+    /** flag bits, taken from searchlib/common/transport.h */
+    static final int MQFLAG_REPORT_ACTIVEDOCS = 0x00000020;
+}