From 7645618fd3914cb8a20561625913c20d49504a49 Mon Sep 17 00:00:00 2001
From: Antonin Kral <a.kral@bobek.cz>
Date: Wed, 11 Aug 2010 12:38:57 +0200
Subject: Imported Upstream version 1.6.0

---
 s/d_logic.h | 139 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 137 insertions(+), 2 deletions(-)

(limited to 's/d_logic.h')

diff --git a/s/d_logic.h b/s/d_logic.h
index e426cb2..0f7ba35 100644
--- a/s/d_logic.h
+++ b/s/d_logic.h
@@ -18,10 +18,135 @@
 
 #pragma once
 
-#include "../stdafx.h"
+#include "../pch.h"
+#include "../db/jsobj.h"
+#include "util.h"
 
 namespace mongo {
+    
+    class ShardingState;
+    
+    typedef ShardChunkVersion ConfigVersion;
+    typedef map<string,ConfigVersion> NSVersionMap;
+
+    // -----------
+
+    class ChunkMatcher {
+        typedef map<BSONObj,pair<BSONObj,BSONObj>,BSONObjCmp> MyMap;
+    public:
+        
+        bool belongsToMe( const BSONObj& key , const DiskLoc& loc ) const;
+
+    private:
+        ChunkMatcher( ConfigVersion version );
+        
+        void gotRange( const BSONObj& min , const BSONObj& max );
+        
+        ConfigVersion _version;
+        BSONObj _key;
+        MyMap _map;
+        
+        friend class ShardingState;
+    };
+
+    typedef shared_ptr<ChunkMatcher> ChunkMatcherPtr;
+    
+    // --------------
+    // --- global state ---
+    // --------------
+
+    class ShardingState {
+    public:
+        ShardingState();
+        
+        bool enabled() const { return _enabled; }
+        const string& getConfigServer() const { return _configServer; }
+        void enable( const string& server );
+
+        void gotShardName( const string& name );
+        void gotShardHost( const string& host );
+        
+        bool hasVersion( const string& ns );
+        bool hasVersion( const string& ns , ConfigVersion& version );
+        ConfigVersion& getVersion( const string& ns ); // TODO: this is dangeroues
+        void setVersion( const string& ns , const ConfigVersion& version );
+        
+        void appendInfo( BSONObjBuilder& b );
+        
+        ChunkMatcherPtr getChunkMatcher( const string& ns );
+        
+        bool inCriticalMigrateSection();
+    private:
+        
+        bool _enabled;
+        
+        string _configServer;
+        
+        string _shardName;
+        string _shardHost;
+
+        mongo::mutex _mutex;
+        NSVersionMap _versions;
+        map<string,ChunkMatcherPtr> _chunks;
+    };
+    
+    extern ShardingState shardingState;
+
+    // --------------
+    // --- per connection ---
+    // --------------
+    
+    class ShardedConnectionInfo {
+    public:
+        ShardedConnectionInfo();
+        
+        const OID& getID() const { return _id; }
+        bool hasID() const { return _id.isSet(); }
+        void setID( const OID& id );
+        
+        ConfigVersion& getVersion( const string& ns ); // TODO: this is dangeroues
+        void setVersion( const string& ns , const ConfigVersion& version );
+        
+        static ShardedConnectionInfo* get( bool create );
+        static void reset();
+        
+        bool inForceMode() const { 
+            return _forceMode;
+        }
+        
+        void enterForceMode(){ _forceMode = true; }
+        void leaveForceMode(){ _forceMode = false; }
+
+    private:
+        
+        OID _id;
+        NSVersionMap _versions;
+        bool _forceMode;
+
+        static boost::thread_specific_ptr<ShardedConnectionInfo> _tl;
+    };
+
+    struct ShardForceModeBlock {
+        ShardForceModeBlock(){
+            info = ShardedConnectionInfo::get( false );
+            if ( info )
+                info->enterForceMode();
+        }
+        ~ShardForceModeBlock(){
+            if ( info )
+                info->leaveForceMode();
+        }
+
+        ShardedConnectionInfo * info;
+    };
+    
+    // -----------------
+    // --- core ---
+    // -----------------
 
+    unsigned long long extractVersion( BSONElement e , string& errmsg );
+
+    
     /**
      * @return true if we have any shard info for the ns
      */
@@ -35,5 +160,15 @@ namespace mongo {
     /**
      * @return true if we took care of the message and nothing else should be done
      */
-    bool handlePossibleShardedMessage( Message &m, DbResponse &dbresponse );
+    bool handlePossibleShardedMessage( Message &m, DbResponse * dbresponse );
+
+    void logOpForSharding( const char * opstr , const char * ns , const BSONObj& obj , BSONObj * patt );
+
+    // -----------------
+    // --- writeback ---
+    // -----------------
+
+    /* queue a write back on a remote server for a failed write */
+    void queueWriteBack( const string& remote , const BSONObj& o );
+
 }
-- 
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