1 files changed, 109 insertions, 0 deletions
diff --git a/sql/rpl_reporting.h b/sql/rpl_reporting.h
new file mode 100644
index 00000000..62b934c1
--- /dev/null
+++ b/sql/rpl_reporting.h
@@ -0,0 +1,109 @@
+/* Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1335  USA */
+
+#ifndef RPL_REPORTING_H
+#define RPL_REPORTING_H
+
+#include <my_sys.h>                             /* loglevel */
+
+/**
+   Maximum size of an error message from a slave thread.
+ */
+#define MAX_SLAVE_ERRMSG      1024
+
+/**
+   Mix-in to handle the message logging and reporting for relay log
+   info and master log info structures.
+
+   By inheriting from this class, the class is imbued with
+   capabilities to do slave reporting.
+ */
+class Slave_reporting_capability
+{
+public:
+  /** lock used to synchronize m_last_error on 'SHOW SLAVE STATUS' **/
+  mutable mysql_mutex_t err_lock;
+  /**
+     Constructor.
+
+     @param thread_name Printable name of the slave thread that is reporting.
+   */
+  Slave_reporting_capability(char const *thread_name);
+
+  /**
+     Writes a message and, if it's an error message, to Last_Error
+     (which will be displayed by SHOW SLAVE STATUS).
+
+     @param level       The severity level
+     @param err_code    The error code
+     @param msg         The message (usually related to the error
+                        code, but can contain more information), in
+                        printf() format.
+  */
+  void report(loglevel level, int err_code, const char *extra_info,
+              const char *msg, ...) const
+    ATTRIBUTE_FORMAT(printf, 5, 6);
+
+  /**
+     Clear errors. They will not show up under <code>SHOW SLAVE
+     STATUS</code>.
+   */
+  void clear_error() {
+    mysql_mutex_lock(&err_lock);
+    m_last_error.clear();
+    mysql_mutex_unlock(&err_lock);
+  }
+
+  /**
+     Error information structure.
+   */
+  class Error {
+    friend class Slave_reporting_capability;
+  public:
+    Error()
+    {
+      clear();
+    }
+
+    void clear()
+    {
+      number= 0;
+      message[0]= '\0';
+    }
+
+    /** Error code */
+    uint32 number;
+    /** Error message */
+    char message[MAX_SLAVE_ERRMSG];
+  };
+
+  Error const& last_error() const { return m_last_error; }
+
+  virtual ~Slave_reporting_capability()= 0;
+private:
+  /**
+     Last error produced by the I/O or SQL thread respectively.
+   */
+  mutable Error m_last_error;
+
+  char const *const m_thread_name;
+
+  // not implemented
+  Slave_reporting_capability(const Slave_reporting_capability& rhs);
+  Slave_reporting_capability& operator=(const Slave_reporting_capability& rhs);
+};
+
+#endif // RPL_REPORTING_H
+