From 2dc0b90341ba0adaa79f54a751f4e9fb8c1f2636 Mon Sep 17 00:00:00 2001
From: ermolovd <ermolovd@yandex-team.com>
Date: Fri, 7 Feb 2025 11:41:21 +0300
Subject: YT-21081: improve temp directory structure, create subdirectory with
 username commit_hash:004bb333221acac91378ce9fcc12ce091f38ee87

---
 yt/cpp/mapreduce/interface/temp.cpp | 157 ++++++++++++++++++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 yt/cpp/mapreduce/interface/temp.cpp

(limited to 'yt/cpp/mapreduce/interface/temp.cpp')

diff --git a/yt/cpp/mapreduce/interface/temp.cpp b/yt/cpp/mapreduce/interface/temp.cpp
new file mode 100644
index 00000000000..04250d12a64
--- /dev/null
+++ b/yt/cpp/mapreduce/interface/temp.cpp
@@ -0,0 +1,157 @@
+#include "temp.h"
+#include "errors.h"
+
+#include <yt/cpp/mapreduce/interface/config.h>
+
+#include <util/system/yassert.h>
+
+namespace NYT {
+
+////////////////////////////////////////////////////////////////////////////////
+
+TTempTable::TTempTable(
+    IClientBasePtr client,
+    const TString& prefix,
+    const TYPath& directory,
+    const TCreateOptions& options)
+    : Client_(std::move(client))
+{
+    Name_ = CreateTempTable(Client_, prefix, directory, options);
+}
+
+TTempTable::TTempTable(TTempTable::TPrivateConstuctorTag, IClientBasePtr client, TYPath path, const TCreateOptions& options)
+    : Client_(std::move(client))
+    , Name_(std::move(path))
+{
+    Client_->Create(Name_, NT_TABLE, options);
+}
+
+TTempTable::TTempTable(TTempTable&& sourceTable)
+    : Client_(sourceTable.Client_)
+    , Name_(sourceTable.Name_)
+    , Owns_(sourceTable.Owns_)
+{
+    sourceTable.Owns_ = false;
+}
+
+TTempTable& TTempTable::operator=(TTempTable&& sourceTable)
+{
+    if (&sourceTable == this) {
+        return *this;
+    }
+
+    if (Owns_) {
+        RemoveTable();
+    }
+
+    Client_ = sourceTable.Client_;
+    Name_ = sourceTable.Name_;
+    Owns_ = sourceTable.Owns_;
+
+    sourceTable.Owns_ = false;
+
+    return *this;
+}
+
+TTempTable TTempTable::CreateAutoremovingTable(IClientBasePtr client, TYPath path, const TCreateOptions& options)
+{
+    return TTempTable(TTempTable::TPrivateConstuctorTag(), std::move(client), std::move(path), options);
+}
+
+void TTempTable::RemoveTable()
+{
+    if (TConfig::Get()->KeepTempTables) {
+        return;
+    }
+    Client_->Remove(Name_, TRemoveOptions().Force(true));
+}
+
+TTempTable::~TTempTable()
+{
+    if (Owns_) {
+        try {
+            RemoveTable();
+        } catch (...) {
+        }
+    }
+}
+
+TString TTempTable::Name() const &
+{
+    return Name_;
+}
+
+TString TTempTable::Release()
+{
+    Y_ASSERT(Owns_);
+    Owns_ = false;
+    return Name_;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+TYPath CreateTempTable(
+    const IClientBasePtr& client,
+    const TString& prefix,
+    const TYPath& directory,
+    const TCreateOptions& options)
+{
+    TYPath result;
+    bool createDirectory = false;
+
+    if (directory) {
+        result = directory;
+    } else {
+        result = TConfig::Get()->RemoteTempTablesDirectory;
+
+        // User might override configuration above.
+        // Class used to create directory in such cases if it doesn't exist.
+        // We keep this behaviour.
+        createDirectory = true;
+    }
+
+    if (result == DefaultRemoteTempTablesDirectory) {
+        result += "/";
+        result += client->GetParentClient()->WhoAmI().Login;
+        createDirectory = true;
+    }
+
+    auto resultDirectory = result;
+
+    result += "/";
+    result += prefix;
+    result += CreateGuidAsString();
+
+    if (!createDirectory) {
+        client->Create(result, NT_TABLE, options);
+    } else {
+        // Directory we are going to create our table in can be missing.
+        // We create it explicitly outside of any transactions,
+        // because concurrent processes might want to create the same directory from other transactions.
+        //
+        // It's unlikely but directory might be removed between directory creation and table creation
+        // we retry attempt if it was failed with path resolution error.
+        const int maxAttempts = 3;
+        for (int i = 0; i < maxAttempts; ++i) {
+            client->GetParentClient()->Create(resultDirectory, NT_MAP, TCreateOptions().Recursive(true).IgnoreExisting(true));
+
+            try {
+                client->Create(result, NT_TABLE, options);
+                break;
+            } catch (const TErrorResponse& error) {
+                if (error.IsResolveError()) {
+                    if (i < maxAttempts - 1) {
+                        continue;
+                    }
+                }
+                throw;
+            }
+        }
+    }
+
+    return result;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NYT
-- 
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