Lazy string interpolation in ENSURE

LiteDB/Engine/Disk/DiskService.cs

@@ -1,10 +1,7 @@
 using System;
-using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.IO;
-using System.Text;
 using System.Threading;
-using System.Threading.Tasks;
 using static LiteDB.Constants;
 
 namespace LiteDB.Engine
@@ -29,7 +26,7 @@ internal class DiskService : IDisposable
         private long _logLength;
 
         public DiskService(
-            EngineSettings settings, 
+            EngineSettings settings,
             EngineState state,
             int[] memorySegmentSizes)
         {
@@ -261,7 +258,7 @@ public IEnumerable<PageBuffer> ReadFull(FileOrigin origin)
 
                     var bytesRead = stream.Read(buffer, 0, PAGE_SIZE);
 
-                    ENSURE(bytesRead == PAGE_SIZE, $"ReadFull must read PAGE_SIZE bytes [{bytesRead}]");
+                    ENSURE(bytesRead == PAGE_SIZE, "ReadFull must read PAGE_SIZE bytes [{0}]", bytesRead);
 
                     yield return new PageBuffer(buffer, 0, 0)
                     {

LiteDB/Engine/Disk/Streams/AesStream.cs

@@ -22,7 +22,7 @@ public class AesStream : Stream
 
         private readonly byte[] _decryptedZeroes = new byte[16];
 
-        private static readonly byte[] _emptyContent = new byte[PAGE_SIZE - 1 - 16]; // 1 for aes indicator + 16 for salt 
+        private static readonly byte[] _emptyContent = new byte[PAGE_SIZE - 1 - 16]; // 1 for aes indicator + 16 for salt
 
         public byte[] Salt { get; }
 
@@ -111,7 +111,7 @@ public AesStream(string password, Stream stream)
                     // check whether bytes 32 to 64 is empty. This indicates LiteDb was unable to write encrypted 1s during last attempt.
                     _stream.Read(checkBuffer, 0, checkBuffer.Length);
                     isNew = checkBuffer.All(x => x == 0);
-                    
+
                     // reset checkBuffer and stream position
                     Array.Clear(checkBuffer, 0, checkBuffer.Length);
                     _stream.Position = 32;
@@ -160,7 +160,7 @@ public AesStream(string password, Stream stream)
         /// </summary>
         public override int Read(byte[] array, int offset, int count)
         {
-            ENSURE(this.Position % PAGE_SIZE == 0, $"AesRead: position must be in PAGE_SIZE module. Position={this.Position}, File={_name}");
+            ENSURE(this.Position % PAGE_SIZE == 0, "AesRead: position must be in PAGE_SIZE module. Position={0}, File={1}", this.Position, _name);
 
             var r = _reader.Read(array, offset, count);
 
@@ -181,7 +181,7 @@ public override int Read(byte[] array, int offset, int count)
         public override void Write(byte[] array, int offset, int count)
         {
             ENSURE(count == PAGE_SIZE || count == 1, "buffer size must be PAGE_SIZE");
-            ENSURE(this.Position == HeaderPage.P_INVALID_DATAFILE_STATE || this.Position % PAGE_SIZE == 0, $"AesWrite: position must be in PAGE_SIZE module. Position={this.Position}, File={_name}");
+            ENSURE(this.Position == HeaderPage.P_INVALID_DATAFILE_STATE || this.Position % PAGE_SIZE == 0, "AesWrite: position must be in PAGE_SIZE module. Position={0}, File={1}", this.Position, _name);
 
             _writer.Write(array, offset, count);
         }

LiteDB/Engine/FileReader/FileReaderV8.cs

@@ -117,7 +117,7 @@ public IEnumerable<BsonDocument> GetDocuments(string collection)
             var colID = _collections[collection];
 
             if (!_collectionsDataPages.ContainsKey(colID)) yield break;
-            
+
             var dataPages = _collectionsDataPages[colID];
             var uniqueIDs = new HashSet<BsonValue>();
 
@@ -156,8 +156,8 @@ public IEnumerable<BsonDocument> GetDocuments(string collection)
                         // empty slot
                         if (position == 0) continue;
 
-                        ENSURE(position > 0 && length > 0, $"Invalid footer ref position {position} with length {length}");
-                        ENSURE(position + length < PAGE_SIZE, $"Invalid footer ref position {position} with length {length}");
+                        ENSURE(position > 0 && length > 0, "Invalid footer ref position {0} with length {1}", position, length);
+                        ENSURE(position + length < PAGE_SIZE, "Invalid footer ref position {0} with length {1}", position, length);
 
                         // get segment slice
                         var segment = buffer.Slice(position, length);
@@ -183,8 +183,8 @@ public IEnumerable<BsonDocument> GetDocuments(string collection)
                                 var nextBuffer = nextPage.Value.Buffer;
 
                                 // make page validations
-                                ENSURE(nextPage.Value.PageType == PageType.Data, $"Invalid PageType (excepted Data, get {nextPage.Value.PageType})");
-                                ENSURE(nextPage.Value.ColID == colID, $"Invalid ColID in this page (expected {colID}, get {nextPage.Value.ColID})");
+                                ENSURE(nextPage.Value.PageType == PageType.Data, "Invalid PageType (excepted Data, get {0})", nextPage.Value.PageType);
+                                ENSURE(nextPage.Value.ColID == colID, "Invalid ColID in this page (expected {0}, get {1})", colID, nextPage.Value.ColID);
                                 ENSURE(nextPage.Value.ItemsCount > 0, "Page with no items count");
 
                                 // read slot address
@@ -196,15 +196,15 @@ public IEnumerable<BsonDocument> GetDocuments(string collection)
                                 length = nextBuffer.ReadUInt16(lengthAddr);
 
                                 // empty slot
-                                ENSURE(length > 0, $"Last DataBlock request a next extend to {nextBlock}, but this block are empty footer");
+                                ENSURE(length > 0, "Last DataBlock request a next extend to {0}, but this block are empty footer", nextBlock);
 
                                 // get segment slice
                                 segment = nextBuffer.Slice(position, length);
                                 extend = segment.ReadBool(DataBlock.P_EXTEND);
                                 nextBlock = segment.ReadPageAddress(DataBlock.P_NEXT_BLOCK);
                                 data = segment.Slice(DataBlock.P_BUFFER, segment.Count - DataBlock.P_BUFFER);
 
-                                ENSURE(extend == true, $"Next datablock always be an extend. Invalid data block {nextBlock}");
+                                ENSURE(extend == true, "Next datablock always be an extend. Invalid data block {0}", nextBlock);
 
                                 // write data on memorystream
 
@@ -219,8 +219,8 @@ public IEnumerable<BsonDocument> GetDocuments(string collection)
                                 var docResult = r.ReadDocument();
                                 var id = docResult.Value["_id"];
 
-                                ENSURE(!(id == BsonValue.Null || id == BsonValue.MinValue || id == BsonValue.MaxValue), $"Invalid _id value: {id}");
-                                ENSURE(uniqueIDs.Contains(id) == false, $"Duplicated _id value: {id}");
+                                ENSURE(!(id == BsonValue.Null || id == BsonValue.MinValue || id == BsonValue.MaxValue), "Invalid _id value: {0}", id);
+                                ENSURE(uniqueIDs.Contains(id) == false, "Duplicated _id value: {0}", id);
 
                                 uniqueIDs.Add(id);
 
@@ -279,7 +279,7 @@ private void LoadDataPages()
             var header = this.ReadPage(0, out var pageInfo).GetValue();
             var lastPageID = header.Buffer.ReadUInt32(HeaderPage.P_LAST_PAGE_ID); //TOFO: tentar não usar esse valor como referencia (varrer tudo)
 
-            ENSURE(lastPageID <= _maxPageID, $"LastPageID {lastPageID} should be less or equals to maxPageID {_maxPageID}");
+            ENSURE(lastPageID <= _maxPageID, "LastPageID {0} should be less or equals to maxPageID {1}", lastPageID, _maxPageID);
 
             for (uint i = 0; i <= lastPageID; i++)
             {
@@ -398,8 +398,8 @@ private void LoadIndexes()
 
                         position += 15; // head 5 bytes, tail 5 bytes, reserved 1 byte, freeIndexPageList 4 bytes
 
-                        ENSURE(!string.IsNullOrEmpty(name), $"Index name can't be empty (collection {collection.Key} - index: {i})");
-                        ENSURE(!string.IsNullOrEmpty(expr), $"Index expression can't be empty (collection {collection.Key} - index: {i})");
+                        ENSURE(!string.IsNullOrEmpty(name), "Index name can't be empty (collection {0} - index: {1})", collection.Key, i);
+                        ENSURE(!string.IsNullOrEmpty(expr), "Index expression can't be empty (collection {0} - index: {1})", collection.Key, i);
 
                         var indexInfo = new IndexInfo
                         {
@@ -481,7 +481,7 @@ private void LoadIndexMap()
                     pageInfo.PageID = pageID;
                     pageInfo.ColID = buffer.ReadUInt32(BasePage.P_COL_ID);
 
-                    ENSURE(read == PAGE_SIZE, $"Page position {_logStream} read only than {read} bytes (instead {PAGE_SIZE})");
+                    ENSURE(read == PAGE_SIZE, "Page position {0} read only than {1} bytes (instead {2})", _logStream, read, PAGE_SIZE);
 
                     var position = new PagePosition(pageID, currentPosition);
 
@@ -515,7 +515,7 @@ private void LoadIndexMap()
             {
                 var mapIndexPages = transactions[transactionID];
 
-                // update 
+                // update
                 foreach (var page in mapIndexPages)
                 {
                     _logIndexMap[page.PageID] = page.Position;
@@ -532,7 +532,7 @@ private Result<BasePage> ReadPage(uint pageID, out PageInfo pageInfo)
 
             try
             {
-                ENSURE(pageID <= _maxPageID, $"PageID: {pageID} should be less then or equals to maxPageID: {_maxPageID}");
+                ENSURE(pageID <= _maxPageID, "PageID: {0} should be less then or equals to maxPageID: {1}", pageID, _maxPageID);
 
                 var pageBuffer = new PageBuffer(new byte[PAGE_SIZE], 0, PAGE_SIZE);
                 Stream stream;
@@ -556,13 +556,13 @@ private Result<BasePage> ReadPage(uint pageID, out PageInfo pageInfo)
 
                 read = stream.Read(pageBuffer.Array, pageBuffer.Offset, pageBuffer.Count);
 
-                ENSURE(read == PAGE_SIZE, $"Page position {stream.Position} read only than {read} bytes (instead {PAGE_SIZE})");
+                ENSURE(read == PAGE_SIZE, "Page position {0} read only than {1} bytes (instead {2})", stream.Position, read, PAGE_SIZE);
 
                 var page = new BasePage(pageBuffer);
 
                 pageInfo.ColID = page.ColID;
 
-                ENSURE(page.PageID == pageID, $"Expect read pageID: {pageID} but header contains pageID: {page.PageID}");
+                ENSURE(page.PageID == pageID, "Expect read pageID: {0} but header contains pageID: {1}", pageID, page.PageID);
 
                 return page;
             }

LiteDB/Engine/Pages/BasePage.cs

@@ -102,8 +102,8 @@ internal class BasePage
         /// Get how many bytes are used in footer page at this moment
         /// ((HighestIndex + 1) * 4 bytes per slot: [2 for position, 2 for length])
         /// </summary>
-        public int FooterSize => 
-            (this.HighestIndex == byte.MaxValue ? 
+        public int FooterSize =>
+            (this.HighestIndex == byte.MaxValue ?
             0 :  // no items in page
             ((this.HighestIndex + 1) * SLOT_SIZE)); // 4 bytes PER item (2 to position + 2 to length) - need consider HighestIndex used
 
@@ -282,8 +282,8 @@ public BufferSlice Get(byte index)
             var position = _buffer.ReadUInt16(positionAddr);
             var length = _buffer.ReadUInt16(lengthAddr);
 
-            ENSURE(this.IsValidPos(position), $"invalid segment position in index footer: {ToString()}/{index}");
-            ENSURE(this.IsValidLen(length), $"invalid segment length in index footer: {ToString()}/{index}");
+            ENSURE(this.IsValidPos(position), "invalid segment position in index footer: {0}/{1}", this, index);
+            ENSURE(this.IsValidLen(length), "invalid segment length in index footer: {0}/{1}", this, index);
 
             // return buffer slice with content only data
             return _buffer.Slice(position, length);
@@ -408,7 +408,7 @@ public void Delete(byte index)
                 this.NextFreePosition = position;
             }
             else
-            { 
+            {
                 // if segment is in middle of the page, add this blocks as fragment block
                 this.FragmentedBytes += length;
             }
@@ -475,7 +475,7 @@ public BufferSlice Update(byte index, ushort bytesLength)
 
                 if (isLastSegment)
                 {
-                    // if is at end of page, must get back unused blocks 
+                    // if is at end of page, must get back unused blocks
                     this.NextFreePosition -= diff;
                 }
                 else

LiteDB/Engine/Pages/DataPage.cs

@@ -1,6 +1,4 @@
 using System.Collections.Generic;
-using System.IO;
-using System.Linq;
 using static LiteDB.Constants;
 
 namespace LiteDB.Engine
@@ -16,7 +14,7 @@ internal class DataPage : BasePage
         public DataPage(PageBuffer buffer)
             : base(buffer)
         {
-            ENSURE(this.PageType == PageType.Data, $"Page type must be data page: {PageType}");
+            ENSURE(this.PageType == PageType.Data, "Page type must be data page: {0}", PageType);
 
             if (this.PageType != PageType.Data) throw LiteException.InvalidPageType(PageType.Data, this);
         }
@@ -108,7 +106,7 @@ public IEnumerable<PageAddress> GetBlocks()
         /// <returns>A slot number between 0 and 4</returns>
         public static byte FreeIndexSlot(int freeBytes)
         {
-            ENSURE(freeBytes >= 0, $"FreeBytes must be positive: {freeBytes}");
+            ENSURE(freeBytes >= 0, "FreeBytes must be positive: {0}", freeBytes);
 
             for (var i = 0; i < _freePageSlots.Length; i++)
             {

LiteDB/Engine/Services/DataService.cs

@@ -165,7 +165,7 @@ public IEnumerable<BufferSlice> Read(PageAddress address)
 
             while (address != PageAddress.Empty)
             {
-                ENSURE(counter++ < _maxItemsCount, $"Detected loop in data Read({address})");
+                ENSURE(counter++ < _maxItemsCount, "Detected loop in data Read({0})", address);
 
                 var dataPage = _snapshot.GetPage<DataPage>(address.PageID);
 

LiteDB/Engine/Services/IndexService.cs

@@ -79,10 +79,10 @@ public IndexNode AddNode(CollectionIndex index, BsonValue key, PageAddress dataB
         /// Insert a new node index inside an collection index.
         /// </summary>
         private IndexNode AddNode(
-            CollectionIndex index, 
-            BsonValue key, 
-            PageAddress dataBlock, 
-            byte insertLevels, 
+            CollectionIndex index,
+            BsonValue key,
+            PageAddress dataBlock,
+            byte insertLevels,
             IndexNode last)
         {
             // get a free index page for head note
@@ -108,7 +108,7 @@ private IndexNode AddNode(
                 // while: scan from left to right
                 while (right.IsEmpty == false && right != index.Tail)
                 {
-                    ENSURE(counter++ < _maxItemsCount, $"Detected loop in AddNode({node.Position})");
+                    ENSURE(counter++ < _maxItemsCount, "Detected loop in AddNode({0})", node.Position);
 
                     var rightNode = this.GetNode(right);
 
@@ -206,7 +206,7 @@ public IEnumerable<IndexNode> GetNodeList(PageAddress nodeAddress)
 
             while (node != null)
             {
-                ENSURE(counter++ < _maxItemsCount, $"Detected loop in GetNodeList({nodeAddress})");
+                ENSURE(counter++ < _maxItemsCount, "Detected loop in GetNodeList({0})", nodeAddress);
 
                 yield return node;
 
@@ -225,7 +225,7 @@ public void DeleteAll(PageAddress pkAddress)
 
             while (node != null)
             {
-                ENSURE(counter++ < _maxItemsCount, $"Detected loop in DeleteAll({pkAddress})");
+                ENSURE(counter++ < _maxItemsCount, "Detected loop in DeleteAll({0})", pkAddress);
 
                 this.DeleteSingleNode(node, indexes[node.Slot]);
 
@@ -246,7 +246,7 @@ public IndexNode DeleteList(PageAddress pkAddress, HashSet<PageAddress> toDelete
 
             while (node != null)
             {
-                ENSURE(counter++ < _maxItemsCount, $"Detected loop in DeleteList({pkAddress})");
+                ENSURE(counter++ < _maxItemsCount, "Detected loop in DeleteList({0})", pkAddress);
 
                 if (toDelete.Contains(node.Position))
                 {
@@ -333,7 +333,7 @@ public void DropIndex(CollectionIndex index)
         }
 
         #region Find
-        
+
         /// <summary>
         /// Return all index nodes from an index
         /// </summary>
@@ -344,7 +344,7 @@ public IEnumerable<IndexNode> FindAll(CollectionIndex index, int order)
 
             while (!cur.GetNextPrev(0, order).IsEmpty)
             {
-                ENSURE(counter++ < _maxItemsCount, $"Detected loop in FindAll({index.Name})");
+                ENSURE(counter++ < _maxItemsCount, "Detected loop in FindAll({0})", index.Name);
 
                 cur = this.GetNode(cur.GetNextPrev(0, order));
 
@@ -356,7 +356,7 @@ public IEnumerable<IndexNode> FindAll(CollectionIndex index, int order)
         }
 
         /// <summary>
-        /// Find first node that index match with value . 
+        /// Find first node that index match with value .
         /// If index are unique, return unique value - if index are not unique, return first found (can start, middle or end)
         /// If not found but sibling = true and key are not found, returns next value index node (if order = Asc) or prev node (if order = Desc)
         /// </summary>
@@ -371,7 +371,7 @@ public IndexNode Find(CollectionIndex index, BsonValue value, bool sibling, int
 
                 while (right.IsEmpty == false)
                 {
-                    ENSURE(counter++ < _maxItemsCount, $"Detected loop in Find({index.Name}, {value})");
+                    ENSURE(counter++ < _maxItemsCount, "Detected loop in Find({0}, {1})", index.Name, value);
 
                     var rightNode = this.GetNode(right);
 

LiteDB/Engine/Services/TransactionService.cs

@@ -113,7 +113,7 @@ public Snapshot CreateSnapshot(LockMode mode, string collection, bool addIfNotEx
                 _snapshots[collection] = snapshot = create();
             }
 
-            // update transaction mode to write in first write snaphost request 
+            // update transaction mode to write in first write snaphost request
             if (mode == LockMode.Write) _mode = LockMode.Write;
 
             return snapshot;
@@ -250,7 +250,7 @@ IEnumerable<PageBuffer> source()
         /// </summary>
         public void Commit()
         {
-            ENSURE(_state == TransactionState.Active, $"transaction must be active to commit (current state: {_state})");
+            ENSURE(_state == TransactionState.Active, "transaction must be active to commit (current state: {0})", _state);
 
             LOG($"commit transaction ({_transPages.TransactionSize} pages)", "TRANSACTION");
 
@@ -281,7 +281,7 @@ public void Commit()
         /// </summary>
         public void Rollback()
         {
-            ENSURE(_state == TransactionState.Active, $"transaction must be active to rollback (current state: {_state})");
+            ENSURE(_state == TransactionState.Active, "transaction must be active to rollback (current state: {0})", _state);
 
             LOG($"rollback transaction ({_transPages.TransactionSize} pages with {_transPages.NewPages.Count} returns)", "TRANSACTION");