Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/src/rgw/rgw_kafka.h b/src/rgw/rgw_kafka.h
new file mode 100644
index 000000000..569fb631d
--- /dev/null
+++ b/src/rgw/rgw_kafka.h
@@ -0,0 +1,81 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab ft=cpp
+
+#pragma once
+
+#include <string>
+#include <functional>
+#include <boost/smart_ptr/intrusive_ptr.hpp>
+#include <boost/optional.hpp>
+
+#include "include/common_fwd.h"
+
+namespace rgw::kafka {
+// forward declaration of connection object
+struct connection_t;
+
+typedef boost::intrusive_ptr<connection_t> connection_ptr_t;
+
+// required interfaces needed so that connection_t could be used inside boost::intrusive_ptr
+void intrusive_ptr_add_ref(const connection_t* p);
+void intrusive_ptr_release(const connection_t* p);
+
+// the reply callback is expected to get an integer parameter
+// indicating the result, and not to return anything
+typedef std::function<void(int)> reply_callback_t;
+
+// initialize the kafka manager
+bool init(CephContext* cct);
+
+// shutdown the kafka manager
+void shutdown();
+
+// connect to a kafka endpoint
+connection_ptr_t connect(const std::string& url, bool use_ssl, bool verify_ssl, boost::optional<const std::string&> ca_location);
+
+// publish a message over a connection that was already created
+int publish(connection_ptr_t& conn,
+    const std::string& topic,
+    const std::string& message);
+
+// publish a message over a connection that was already created
+// and pass a callback that will be invoked (async) when broker confirms
+// receiving the message
+int publish_with_confirm(connection_ptr_t& conn, 
+    const std::string& topic,
+    const std::string& message,
+    reply_callback_t cb);
+
+// convert the integer status returned from the "publish" function to a string
+std::string status_to_string(int s);
+
+// number of connections
+size_t get_connection_count();
+  
+// return the number of messages that were sent
+// to broker, but were not yet acked/nacked/timedout
+size_t get_inflight();
+
+// running counter of successfully queued messages
+size_t get_queued();
+
+// running counter of dequeued messages
+size_t get_dequeued();
+
+// number of maximum allowed connections
+size_t get_max_connections();
+
+// number of maximum allowed inflight messages
+size_t get_max_inflight();
+
+// maximum number of messages in the queue
+size_t get_max_queue();
+
+// disconnect from a kafka broker
+bool disconnect(connection_ptr_t& conn);
+
+// display connection as string
+std::string to_string(const connection_ptr_t& conn);
+
+}
+