mirror of https://gitee.com/bigwinds/arangodb
113 lines
3.2 KiB
C++
113 lines
3.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Class to get and cache information about the cluster state
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///
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/// @file ClusterState.cpp
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///
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/// DISCLAIMER
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///
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/// Copyright 2010-2013 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Max Neunhoeffer
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/// @author Copyright 2013, triagens GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "Cluster/ClusterState.h"
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#include "BasicsC/logging.h"
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#include "Basics/WriteLocker.h"
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using namespace triagens::arango;
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// -----------------------------------------------------------------------------
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// --SECTION-- ClusterState class
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// -----------------------------------------------------------------------------
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ClusterState* ClusterState::_theinstance = 0;
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ClusterState* ClusterState::instance () {
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// This does not have to be thread-safe, because we guarantee that
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// this is called very early in the startup phase when there is still
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// a single thread.
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if (0 == _theinstance) {
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_theinstance = new ClusterState( ); // this now happens exactly once
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}
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return _theinstance;
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}
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void ClusterState::initialise () {
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}
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ClusterState::ClusterState ()
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: _agency() {
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loadServerInformation();
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loadShardInformation();
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}
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ClusterState::~ClusterState () {
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}
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void ClusterState::loadServerInformation () {
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while (true) {
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// tue die schmutzige Arbeit, verlasse mit return, sobald OK
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return; // FIXME ...
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LOG_WARNING("ClusterState: Could not (re-)load agency data about servers");
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}
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}
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void ClusterState::loadShardInformation () {
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while (true) {
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// tue die schmutzige Arbeit, verlasse mit return, sobald OK
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return; // FIXME ...
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LOG_WARNING("ClusterState: Could not (re-)load agency data about shards");
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}
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}
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std::string ClusterState::getServerEndpoint (ServerID& serverID) {
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map<ServerID,string>::iterator i = serverAddresses.find(serverID);
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if (i != serverAddresses.end()) {
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return i->second;
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}
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loadServerInformation();
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i = serverAddresses.find(serverID);
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if (i != serverAddresses.end()) {
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return i->second;
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}
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return string("");
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}
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ServerID ClusterState::getResponsibleServer (ShardID& shardID)
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{
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map<ShardID,ServerID>::iterator i = shards.find(shardID);
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if (i != shards.end()) {
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return i->second;
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}
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loadServerInformation();
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i = shards.find(shardID);
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if (i != shards.end()) {
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return i->second;
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}
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return ServerID("");
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}
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
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// End:
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