Protocols tells if they require sequencing of messages. If not messages might be reordered for efficiency.

3 files changed, 5 insertions, 0 deletions

diff --git a/messagebus/src/tests/protocolrepository/protocolrepository.cpp b/messagebus/src/tests/protocolrepository/protocolrepository.cpp
index b2454eb272a..b6178449918 100644
--- a/messagebus/src/tests/protocolrepository/protocolrepository.cpp
+++ b/messagebus/src/tests/protocolrepository/protocolrepository.cpp
@@ -48,6 +48,7 @@ public:
         (void)data;
         throw std::exception();
     }
+    bool requireSequencing() const override { return false; }
 };
 
 int
diff --git a/messagebus/src/vespa/messagebus/iprotocol.h b/messagebus/src/vespa/messagebus/iprotocol.h
index 40cfc779c36..514c5ea676f 100644
--- a/messagebus/src/vespa/messagebus/iprotocol.h
+++ b/messagebus/src/vespa/messagebus/iprotocol.h
@@ -80,6 +80,9 @@ public:
      * @return The decoded routable.
      */
     virtual Routable::UP decode(const vespalib::Version &version, BlobRef data) const = 0; // throw()
+
+
+    virtual bool requireSequencing() const = 0;
 };
 
 } // namespace mbus
diff --git a/messagebus/src/vespa/messagebus/testlib/simpleprotocol.h b/messagebus/src/vespa/messagebus/testlib/simpleprotocol.h
index 8931e1b46f9..09e1ee9febe 100644
--- a/messagebus/src/vespa/messagebus/testlib/simpleprotocol.h
+++ b/messagebus/src/vespa/messagebus/testlib/simpleprotocol.h
@@ -72,6 +72,7 @@ public:
     IRoutingPolicy::UP createPolicy(const string &name, const string &param) const override;
     Blob encode(const vespalib::Version &version, const Routable &routable) const override;
     Routable::UP decode(const vespalib::Version &version, BlobRef data) const override;
+    virtual bool requireSequencing() const override { return false; }
 };
 
 } // namespace mbus