initial code repo

[stor4nfv.git] / src / ceph / src / msg / SimplePolicyMessenger.h

diff --git a/src/ceph/src/msg/SimplePolicyMessenger.h b/src/ceph/src/msg/SimplePolicyMessenger.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ * Portions Copyright (C) 2013 CohortFS, LLC
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef SIMPLE_POLICY_MESSENGER_H
+#define SIMPLE_POLICY_MESSENGER_H
+
+#include "Messenger.h"
+
+class SimplePolicyMessenger : public Messenger
+{
+private:
+  /// lock protecting policy
+  Mutex policy_lock;
+  /// the default Policy we use for Pipes
+  Policy default_policy;
+  /// map specifying different Policies for specific peer types
+  map<int, Policy> policy_map; // entity_name_t::type -> Policy
+
+public:
+
+  SimplePolicyMessenger(CephContext *cct, entity_name_t name,
+                       string mname, uint64_t _nonce)
+    : Messenger(cct, name),
+      policy_lock("SimplePolicyMessenger::policy_lock")
+    {
+    }
+
+    /**
+   * Get the Policy associated with a type of peer.
+   * @param t The peer type to get the default policy for.
+   *
+   * @return A const Policy reference.
+   */
+  Policy get_policy(int t) override {
+    Mutex::Locker l(policy_lock);
+    map<int, Policy>::iterator iter =
+      policy_map.find(t);
+    if (iter != policy_map.end())
+      return iter->second;
+    else
+      return default_policy;
+  }
+
+  Policy get_default_policy() override {
+    Mutex::Locker l(policy_lock);
+    return default_policy;
+  }
+
+  /**
+   * Set a policy which is applied to all peers who do not have a type-specific
+   * Policy.
+   * This is an init-time function and cannot be called after calling
+   * start() or bind().
+   *
+   * @param p The Policy to apply.
+   */
+  void set_default_policy(Policy p) override {
+    Mutex::Locker l(policy_lock);
+    default_policy = p;
+  }
+  /**
+   * Set a policy which is applied to all peers of the given type.
+   * This is an init-time function and cannot be called after calling
+   * start() or bind().
+   *
+   * @param type The peer type this policy applies to.
+   * @param p The policy to apply.
+   */
+  void set_policy(int type, Policy p) override {
+    Mutex::Locker l(policy_lock);
+    policy_map[type] = p;
+  }
+
+  /**
+   * Set a Throttler which is applied to all Messages from the given
+   * type of peer.
+   * This is an init-time function and cannot be called after calling
+   * start() or bind().
+   *
+   * @param type The peer type this Throttler will apply to.
+   * @param t The Throttler to apply. SimpleMessenger does not take
+   * ownership of this pointer, but you must not destroy it before
+   * you destroy SimpleMessenger.
+   */
+  void set_policy_throttlers(int type,
+                            Throttle *byte_throttle,
+                            Throttle *msg_throttle) override {
+    Mutex::Locker l(policy_lock);
+    map<int, Policy>::iterator iter =
+      policy_map.find(type);
+    if (iter != policy_map.end()) {
+      iter->second.throttler_bytes = byte_throttle;
+      iter->second.throttler_messages = msg_throttle;
+    } else {
+      default_policy.throttler_bytes = byte_throttle;
+      default_policy.throttler_messages = msg_throttle;
+    }
+  }
+
+}; /* SimplePolicyMessenger */
+
+#endif /* SIMPLE_POLICY_MESSENGER_H */