Added command-line tool cta-catalogue-schema-lock

catalogue/CMakeLists.txt

@@ -22,6 +22,7 @@ set (CATALOGUE_LIB_SRC_FILES
   ArchiveFileItor.cpp
   Catalogue.cpp
   CatalogueFactory.cpp
+  CmdLineTool.cpp
   InMemoryCatalogue.cpp
   OracleCatalogue.cpp
   RdbmsCatalogueSchema.cpp
@@ -94,3 +95,13 @@ install(TARGETS ctacatalogueunittests DESTINATION usr/${CMAKE_INSTALL_LIBDIR})
 install (FILES cta_catalogue_db.conf.example
   DESTINATION ${CMAKE_INSTALL_SYSCONFDIR}/cta
   PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
+
+add_executable(cta-catalogue-schema-lock
+  LockSchemaCmd.cpp
+  LockSchemaCmdLineArgs.cpp
+  LockSchemaCmdMain.cpp)
+
+target_link_libraries (cta-catalogue-schema-lock
+  ctacatalogue)
+
+install(TARGETS cta-catalogue-schema-lock DESTINATION /usr/bin)

catalogue/Catalogue.hpp

@@ -500,7 +500,8 @@ public:
    * prevent a disk instance deleting an archive file that belongs to another
    * disk instance.
    *
-   * @param instanceName The name of the instance from where the deletion request originated
+   * @param instanceName The name of the instance from where the deletion request
+   * originated
    * @param archiveFileId The unique identifier of the archive file.
    * @return The metadata of the deleted archive file including the metadata of
    * the associated and also deleted tape copies.
@@ -518,6 +519,29 @@ public:
    */
   virtual bool isAdmin(const common::dataStructures::SecurityIdentity &admin) const = 0;
 
+  /**
+   * Returns true if SCHEMA_STATUS column of the CTA_TABLE contains the value
+   * LOCKED.
+   *
+   * @return True if SCHEMA_STATUS column of the CTA_TABLE contains the value
+   * LOCKED.
+   */
+  virtual bool schemaIsLocked() const = 0;
+
+  /**
+   * Sets the value of the SCHEMA_STATUS column of the CTA_TABLE to LOCKED.
+   *
+   * Please note that this method is idempotent.
+   */
+  virtual void lockSchema() = 0;
+
+  /**
+   * Sets the value of the SCHEMA_STATUS column of the CTA_TABLE to UNLOCKED.
+   *
+   * Please note that this method is idempotent.
+   */
+  virtual void unlockSchema() = 0;
+
 }; // class Catalogue
 
 } // namespace catalogue

catalogue/CatalogueTest.cpp

@@ -7128,4 +7128,15 @@ TEST_P(cta_catalogue_CatalogueTest, reclaimTape_full_lastFSeq_1_one_tape_file) {
   ASSERT_THROW(m_catalogue->reclaimTape(m_admin, vid1), exception::UserError);
 }
 
+TEST_P(cta_catalogue_CatalogueTest, lockSchema_unlockSchema_lockSchema) {
+  using namespace cta;
+
+  m_catalogue->lockSchema();
+  ASSERT_TRUE(m_catalogue->schemaIsLocked());
+  m_catalogue->unlockSchema();
+  ASSERT_FALSE(m_catalogue->schemaIsLocked());
+  m_catalogue->lockSchema();
+  ASSERT_TRUE(m_catalogue->schemaIsLocked());
+}
+
 } // namespace unitTests

catalogue/CmdLineTool.cpp

+/*
+ * The CERN Tape Archive (CTA) project
+ * Copyright (C) 2015  CERN
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "catalogue/CmdLineTool.hpp"
+
+namespace cta {
+namespace catalogue {
+
+//------------------------------------------------------------------------------
+// constructor
+//------------------------------------------------------------------------------
+CmdLineTool::CmdLineTool(
+  std::istream &inStream,
+  std::ostream &outStream,
+  std::ostream &errStream) noexcept:
+  m_in(inStream),
+  m_out(outStream),
+  m_err(errStream) {
+}
+
+//------------------------------------------------------------------------------
+// destructor
+//------------------------------------------------------------------------------
+CmdLineTool::~CmdLineTool() noexcept {
+}
+
+} // namespace catalogue
+} // namespace cta

catalogue/CmdLineTool.hpp

+/*
+ * The CERN Tape Archive (CTA) project
+ * Copyright (C) 2015  CERN
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <istream>
+#include <ostream>
+
+namespace cta {
+namespace catalogue {
+
+/**
+ * Abstract class implementing common code and data structures for a
+ * command-line tool.
+ */
+class CmdLineTool {
+public:
+  /**
+   * Constructor.
+   *
+   * @param inStream Standard input stream.
+   * @param outStream Standard output stream.
+   * @param errStream Standard error stream.
+   */
+  CmdLineTool(std::istream &inStream, std::ostream &outStream, std::ostream &errStream) noexcept;
+
+  /**
+   * Pure-virtual destructor to guarantee this class is abstract.
+   */
+  virtual ~CmdLineTool() noexcept = 0;
+
+protected:
+
+  /**
+   * Standard input stream.
+   */
+  std::istream &m_in;
+
+  /**
+   * Standard output stream.
+   */
+  std::ostream &m_out;
+
+  /**
+   * Standard error stream.
+   */
+  std::ostream &m_err;
+
+}; // class CmdLineTool
+
+} // namespace catalogue
+} // namespace cta

catalogue/LockSchemaCmd.cpp

+/*
+ * The CERN Tape Archive (CTA) project
+ * Copyright (C) 2015  CERN
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "catalogue/CatalogueFactory.hpp"
+#include "catalogue/LockSchemaCmd.hpp"
+#include "catalogue/LockSchemaCmdLineArgs.hpp"
+
+namespace cta {
+namespace catalogue {
+
+//------------------------------------------------------------------------------
+// constructor
+//------------------------------------------------------------------------------
+LockSchemaCmd::LockSchemaCmd(std::istream &inStream, std::ostream &outStream, std::ostream &errStream):
+CmdLineTool(inStream, outStream, errStream) {
+}
+
+//------------------------------------------------------------------------------
+// destructor
+//------------------------------------------------------------------------------
+LockSchemaCmd::~LockSchemaCmd() noexcept {
+}
+
+//------------------------------------------------------------------------------
+// exceptionThrowingMain
+//------------------------------------------------------------------------------
+int LockSchemaCmd::exceptionThrowingMain(const int argc, char *const *const argv) {
+  const LockSchemaCmdLineArgs cmdLineArgs(argc, argv);
+  const auto dbLogin = rdbms::Login::parseFile(cmdLineArgs.dbConfigPath);
+  const uint64_t nbDbConns = 1;
+  auto catalogue = CatalogueFactory::create(dbLogin, nbDbConns);
+  catalogue->lockSchema();
+
+  return 0;
+}
+
+} // namespace catalogue
+} // namespace cta

catalogue/LockSchemaCmd.hpp

+/*
+ * The CERN Tape Archive (CTA) project
+ * Copyright (C) 2015  CERN
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "catalogue/CmdLineTool.hpp"
+
+namespace cta {
+namespace catalogue {
+
+/**
+ * Command-line tool for locking the catalogue schema in order to help
+ * protect it from accidental deletion.
+ */
+class LockSchemaCmd: public CmdLineTool {
+public:
+
+  /**
+   * Constructor.
+   *
+   * @param inStream Standard input stream.
+   * @param outStream Standard output stream.
+   * @param errStream Standard error stream.
+   */
+  LockSchemaCmd(std::istream &inStream, std::ostream &outStream, std::ostream &errStream);
+
+  /**
+   * Destructor.
+   */
+  ~LockSchemaCmd() noexcept;
+
+  /**
+   * An exception throwing version of main().
+   *
+   * @param argc The number of command-line arguments including the program name.
+   * @param argv The command-line arguments.
+   * @return The exit value of the program.
+   */
+  int exceptionThrowingMain(const int argc, char *const *const argv);
+
+}; // class LockSchemaCmd
+
+} // namespace catalogue
+} // namespace cta

catalogue/LockSchemaCmdLineArgs.cpp

+/*
+ * The CERN Tape Archive (CTA) project
+ * Copyright (C) 2015  CERN
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "catalogue/LockSchemaCmdLineArgs.hpp"
+#include "common/exception/Exception.hpp"
+
+#include <ostream>
+
+namespace cta {
+namespace catalogue {
+
+//------------------------------------------------------------------------------
+// constructor
+//------------------------------------------------------------------------------
+LockSchemaCmdLineArgs::LockSchemaCmdLineArgs(const int argc, const char *const *const argv) {
+  if(argc != 2) {
+    exception::Exception ex;
+    ex.getMessage() << "Wrong number of command-line arguments: excepted=1 actual=" << (argc - 1) << std::endl <<
+      std::endl;
+    printUsage(ex.getMessage());
+    throw ex;
+  }
+  dbConfigPath = argv[1];
+}
+
+//------------------------------------------------------------------------------
+// printUsage
+//------------------------------------------------------------------------------
+void LockSchemaCmdLineArgs::printUsage(std::ostream &os) {
+  os <<
+    "Usage:" << std::endl <<
+    "    cta-catalogue-schema-lock databaseConnectionFile" << std::endl <<
+    "Where:" << std::endl <<
+    "    databaseConnectionFile" << std::endl <<
+    "        The path to the file containing the connection details of the CTA" << std::endl <<
+    "        catalogue database" << std::endl;
+}
+
+} // namespace catalogue
+} // namespace cta

catalogue/LockSchemaCmdLineArgs.hpp

+/*
+ * The CERN Tape Archive (CTA) project
+ * Copyright (C) 2015  CERN
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string>
+
+namespace cta {
+namespace catalogue {
+
+/**
+ * Structure to store the command-line arguments of the command-line tool
+ * named cta-catalogue-schema-lock.
+ */
+struct LockSchemaCmdLineArgs {
+  /**
+   * Path to the file containing the connection details of the catalogue
+   * database.
+   */
+  std::string dbConfigPath;
+
+  /**
+   * Constructor that parses the specified command-line arguments.
+   *
+   * @param argc The number of command-line arguments including the name of the
+   * executable.
+   * @param argv The vector of command-line arguments.
+   */
+  LockSchemaCmdLineArgs(const int argc, const char *const *const argv);
+
+  /**
+   * Prints the usage message of the command-line tool.
+   *
+   * @param os The output stream to which the usage message is to be printed.
+   */
+  static void printUsage(std::ostream &os);
+};
+
+} // namespace catalogue
+} // namespace cta

catalogue/LockSchemaCmdMain.cpp

+/*
+ * The CERN Tape Archive (CTA) project
+ * Copyright (C) 2015  CERN
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "catalogue/LockSchemaCmd.hpp"
+#include "common/exception/Exception.hpp"
+
+#include <iostream>
+
+/**
+ * An exception throwing version of main().
+ *
+ * @param argc The number of command-line arguments including the program name.
+ * @param argv The command-line arguments.
+ * @return The exit value of the program.
+ */
+static int exceptionThrowingMain(const int argc, char *const *const argv);
+
+//------------------------------------------------------------------------------
+// main
+//------------------------------------------------------------------------------
+int main(const int argc, char *const *const argv) {
+  using namespace cta;
+
+  std::string errorMessage;
+
+  try {
+    return exceptionThrowingMain(argc, argv);
+  } catch(exception::Exception &ex) {
+    errorMessage = ex.getMessage().str();
+  } catch(std::exception &se) {
+    errorMessage = se.what();
+  } catch(...) {
+    errorMessage = "An unknown exception was thrown";
+  }
+
+  // Reaching this point means the command has failed, an exception was throw
+  // and errorMessage has been set accordingly
+
+  std::cerr << "Aborting: " << errorMessage << std::endl;
+  return 1;
+}
+
+//------------------------------------------------------------------------------
+// exceptionThrowingMain
+//------------------------------------------------------------------------------
+static int exceptionThrowingMain(const int argc, char *const *const argv) {
+  using namespace cta;
+
+  catalogue::LockSchemaCmd cmd(std::cin, std::cout, std::cerr);
+
+  return cmd.exceptionThrowingMain(argc, argv);
+}

catalogue/RdbmsCatalogue.cpp

@@ -4425,5 +4425,95 @@ std::unique_ptr<common::dataStructures::ArchiveFile> RdbmsCatalogue::getArchiveF
   }
 }
 
+//------------------------------------------------------------------------------
+// schemaIsLocked
+//------------------------------------------------------------------------------
+bool RdbmsCatalogue::schemaIsLocked() const {
+  try {
+    const char *const sql = "SELECT SCHEMA_STATUS FROM CTA_CATALOGUE";
+    auto conn = m_connPool.getConn();
+    auto stmt = conn->createStmt(sql, rdbms::Stmt::AutocommitMode::OFF);
+    auto rset = stmt->executeQuery();
+    if(!rset->next()) {
+      throw exception::Exception("The CTA_CATALOGUE table does not contain any rows when it should contain exactly "
+        "one");
+    }
+    const bool locked = rset->columnString("SCHEMA_STATUS") == "LOCKED";
+    if(rset->next()) {
+      throw exception::Exception("The CTA_CATALOGUE table contains more than one rows when it should contain exactly "
+        "one");
+    }
+    return locked;
+  } catch(exception::Exception &ex) {
+    throw exception::Exception(std::string(__FUNCTION__) + " failed: " + ex.getMessage().str());
+  }
+}
+
+//------------------------------------------------------------------------------
+// lockSchema
+//------------------------------------------------------------------------------
+void RdbmsCatalogue::lockSchema() {
+  try {
+    const char *const sql = "UPDATE CTA_CATALOGUE SET SCHEMA_STATUS = 'LOCKED'";
+    auto conn = m_connPool.getConn();
+    rdbms::AutoRollback autoRollback(conn.get());
+    auto stmt = conn->createStmt(sql, rdbms::Stmt::AutocommitMode::OFF);
+    stmt->executeNonQuery();
+    const uint64_t nbAffectedRows = stmt->getNbAffectedRows();
+    switch(nbAffectedRows) {
+    case 0:
+      throw exception::Exception("Failed to lock CTA catalogue schema: "
+        "The CTA_CATALOGUE table does not contain any rows when it should contain exactly one");
+    case 1:
+      // Successfully locked the CTA catalogue schema
+      break;
+    default:
+      {
+        exception::Exception ex;
+        ex.getMessage() << "Failed to lock CTA catalogue schema: " << "The CTA_CATALOGUE tables contains " <<
+          nbAffectedRows << " rows when it should contain exactly one";
+        throw ex;
+      }
+    }
+    conn->commit();
+
+  } catch(exception::Exception &ex) {
+    throw exception::Exception(std::string(__FUNCTION__) + " failed: " + ex.getMessage().str());
+  }
+}
+
+//------------------------------------------------------------------------------
+// unlockSchema
+//------------------------------------------------------------------------------
+void RdbmsCatalogue::unlockSchema() {
+  try {
+    const char *const sql = "UPDATE CTA_CATALOGUE SET SCHEMA_STATUS = 'UNLOCKED'";
+    auto conn = m_connPool.getConn();
+    rdbms::AutoRollback autoRollback(conn.get());
+    auto stmt = conn->createStmt(sql, rdbms::Stmt::AutocommitMode::OFF);
+    stmt->executeNonQuery();
+    const uint64_t nbAffectedRows = stmt->getNbAffectedRows();
+    switch(nbAffectedRows) {
+    case 0:
+      throw exception::Exception("Failed to unlock CTA catalogue schema: "
+        "The CTA_CATALOGUE table does not contain any rows when it should contain exactly one");
+    case 1:
+      // Successfully locked the CTA catalogue schema
+      break;
+    default:
+      {
+        exception::Exception ex;
+        ex.getMessage() << "Failed to unlock CTA catalogue schema: " << "The CTA_CATALOGUE tables contains " <<
+          nbAffectedRows << " rows when it should contain exactly one";
+        throw ex;
+      }
+    }
+    conn->commit();
+
+  } catch(exception::Exception &ex) {
+    throw exception::Exception(std::string(__FUNCTION__) + " failed: " + ex.getMessage().str());
+  }
+}
+
 } // namespace catalogue
 } // namespace cta

catalogue/RdbmsCatalogue.hpp

@@ -490,6 +490,27 @@ public:
    */
   bool isAdmin(const common::dataStructures::SecurityIdentity &admin) const override;
 
+  /**
+   * Returns true if SCHEMA_STATUS column of the CTA_TABLE contains the value LOCKED.
+   *
+   * @return True if SCHEMA_STATUS column of the CTA_TABLE contains the value LOCKED.
+   */
+  bool schemaIsLocked() const override;
+
+  /**
+   * Sets the value of the SCHEMA_STATUS column of the CTA_TABLE to LOCKED.
+   *
+   * Please note that this method is idempotent.
+   */
+  void lockSchema() override;
+
+  /**
+   * Sets the value of the SCHEMA_STATUS column of the CTA_TABLE to UNLOCKED.
+   *
+   * Please note that this method is idempotent.
+   */
+  void unlockSchema() override;
+
 protected:
 
   /**

catalogue/cta-catalogue-schema-lock.man

+.\" The CERN Tape Archive (CTA) project
+.\" Copyright (C) 2015  CERN
+.\"
+.\" This program is free software: you can redistribute it and/or modify
+.\" it under the terms of the GNU General Public License as published by
+.\" the Free Software Foundation, either version 3 of the License, or
+.\" (at your option) any later version.
+.\"
+.\" This program is distributed in the hope that it will be useful,
+.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the