1 files changed, 116 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/cluster/Event.h b/qpid/cpp/src/qpid/cluster/Event.h
new file mode 100644
index 0000000000..13283edff7
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+++ b/qpid/cpp/src/qpid/cluster/Event.h
@@ -0,0 +1,116 @@
+#ifndef QPID_CLUSTER_EVENT_H
+#define QPID_CLUSTER_EVENT_H
+
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+#include "qpid/cluster/types.h"
+#include "qpid/BufferRef.h"
+#include "qpid/framing/AMQFrame.h"
+#include <sys/uio.h>            // For iovec
+#include <iosfwd>
+
+#include "qpid/cluster/types.h"
+
+namespace qpid {
+
+namespace framing {
+class AMQBody;
+class AMQFrame;
+class Buffer;
+}
+
+namespace cluster {
+
+/** Header data for a multicast event */
+class EventHeader {
+  public:
+    EventHeader(EventType t=DATA, const ConnectionId& c=ConnectionId(), size_t size=0);
+    void decode(const MemberId& m, framing::Buffer&);
+    void encode(framing::Buffer&) const;
+
+    EventType getType() const { return type; }
+    ConnectionId getConnectionId() const { return connectionId; }
+    MemberId getMemberId() const { return connectionId.getMember(); }
+
+    /** Size of payload data, excluding header. */
+    size_t getSize() const { return size; }
+    /** Size of header + payload. */
+    size_t getStoreSize() const { return size + HEADER_SIZE; }
+
+    bool isCluster() const { return connectionId.getNumber() == 0; }
+    bool isConnection() const { return connectionId.getNumber() != 0; }
+    bool isControl() const { return type == CONTROL; }
+
+  protected:
+    static const size_t HEADER_SIZE;
+
+    EventType type;
+    ConnectionId connectionId;
+    size_t size;
+};
+
+/**
+ * Events are sent to/received from the cluster.
+ * Refcounted so they can be stored on queues.
+ */
+class Event : public EventHeader {
+  public:
+    Event();
+    /** Create an event with a buffer that can hold size bytes plus an event header. */
+    Event(EventType t, const ConnectionId& c, size_t);
+
+    /** Create an event copied from delivered data. */
+    static Event decodeCopy(const MemberId& m, framing::Buffer&);
+
+    /** Create a control event. */
+    static Event control(const framing::AMQBody&, const ConnectionId&);
+
+    /** Create a control event. */
+    static Event control(const framing::AMQFrame&, const ConnectionId&);
+
+    // Data excluding header.
+    char* getData() { return store.begin() + HEADER_SIZE; }
+    const char* getData() const { return store.begin() + HEADER_SIZE; }
+
+    // Store including header
+    char* getStore() { return store.begin(); }
+    const char* getStore() const { return store.begin(); }
+
+    const framing::AMQFrame& getFrame() const;
+
+    operator framing::Buffer() const;
+
+    iovec toIovec() const;
+
+  private:
+    void encodeHeader() const;
+
+    BufferRef store;
+    mutable framing::AMQFrame frame;
+};
+
+std::ostream& operator << (std::ostream&, const Event&);
+std::ostream& operator << (std::ostream&, const EventHeader&);
+
+}} // namespace qpid::cluster
+
+#endif  /*!QPID_CLUSTER_EVENT_H*/