mirror of https://gitee.com/bigwinds/arangodb
664 lines
21 KiB
C
664 lines
21 KiB
C
////////////////////////////////////////////////////////////////////////////////
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/// @brief primary collection
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2010-2011 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 Dr. Frank Celler
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/// @author Copyright 2011, triagens GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "primary-collection.h"
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#include <BasicsC/conversions.h>
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#include <BasicsC/files.h>
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#include <BasicsC/hashes.h>
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#include <BasicsC/logging.h>
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#include <BasicsC/strings.h>
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#include "VocBase/key-generator.h"
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#include "VocBase/voc-shaper.h"
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// -----------------------------------------------------------------------------
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// --SECTION-- private functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup VocBase
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hashs the document id
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////////////////////////////////////////////////////////////////////////////////
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static uint64_t HashKeyHeader (TRI_associative_pointer_t* array, void const* key) {
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return TRI_FnvHashString((char const*) key);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hashs the document header
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////////////////////////////////////////////////////////////////////////////////
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static uint64_t HashElementDocument (TRI_associative_pointer_t* array, void const* element) {
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TRI_doc_mptr_t const* e = element;
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return TRI_FnvHashString((char const*) e->_key);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief compares a document id and a document
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////////////////////////////////////////////////////////////////////////////////
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static bool IsEqualKeyDocument (TRI_associative_pointer_t* array, void const* key, void const* element) {
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TRI_doc_mptr_t const* e = element;
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char const * k = key;
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return (strcmp(k, e->_key) == 0);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hashs a datafile identifier
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////////////////////////////////////////////////////////////////////////////////
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static uint64_t HashKeyDatafile (TRI_associative_pointer_t* array, void const* key) {
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TRI_voc_tick_t const* k = key;
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return *k;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hashs a datafile identifier
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////////////////////////////////////////////////////////////////////////////////
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static uint64_t HashElementDatafile (TRI_associative_pointer_t* array, void const* element) {
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TRI_doc_datafile_info_t const* e = element;
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return e->_fid;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief compares a datafile identifier and a datafile info
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////////////////////////////////////////////////////////////////////////////////
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static bool IsEqualKeyElementDatafile (TRI_associative_pointer_t* array, void const* key, void const* element) {
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TRI_voc_tick_t const* k = key;
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TRI_doc_datafile_info_t const* e = element;
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return *k == e->_fid;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates a journal or a compactor journal
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////////////////////////////////////////////////////////////////////////////////
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static TRI_datafile_t* CreateJournal (TRI_primary_collection_t* primary, bool compactor) {
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TRI_col_header_marker_t cm;
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TRI_collection_t* collection;
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TRI_datafile_t* journal;
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TRI_df_marker_t* position;
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int res;
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char* filename;
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collection = &primary->base;
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if (collection->_info._isVolatile) {
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// in-memory collection
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filename = NULL;
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}
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else {
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char* jname;
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char* number;
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// construct a suitable filename
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number = TRI_StringUInt32(TRI_NewTickVocBase());
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if (compactor) {
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jname = TRI_Concatenate3String("journal-", number, ".db");
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}
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else {
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jname = TRI_Concatenate3String("compactor-", number, ".db");
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}
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filename = TRI_Concatenate2File(collection->_directory, jname);
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TRI_FreeString(TRI_CORE_MEM_ZONE, number);
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TRI_FreeString(TRI_CORE_MEM_ZONE, jname);
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}
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// create journal file
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journal = TRI_CreateDatafile(filename, collection->_info._maximalSize);
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if (filename != NULL) {
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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}
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if (journal == NULL) {
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if (TRI_errno() == TRI_ERROR_OUT_OF_MEMORY_MMAP) {
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collection->_lastError = TRI_set_errno(TRI_ERROR_OUT_OF_MEMORY_MMAP);
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collection->_state = TRI_COL_STATE_READ;
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}
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else {
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collection->_lastError = TRI_set_errno(TRI_ERROR_ARANGO_NO_JOURNAL);
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collection->_state = TRI_COL_STATE_WRITE_ERROR;
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}
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return NULL;
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}
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LOG_TRACE("created a new primary journal '%s'", journal->getName(journal));
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if (journal->isPhysical(journal)) {
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char* jname;
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char* number;
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bool ok;
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// and use the correct name
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number = TRI_StringUInt32(journal->_fid);
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if (compactor) {
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jname = TRI_Concatenate3String("compactor-", number, ".db");
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}
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else {
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jname = TRI_Concatenate3String("journal-", number, ".db");
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}
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filename = TRI_Concatenate2File(collection->_directory, jname);
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TRI_FreeString(TRI_CORE_MEM_ZONE, number);
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TRI_FreeString(TRI_CORE_MEM_ZONE, jname);
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ok = TRI_RenameDatafile(journal, filename);
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if (! ok) {
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LOG_WARNING("failed to rename the journal to '%s': %s", filename, TRI_last_error());
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}
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else {
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LOG_TRACE("renamed journal to '%s'", filename);
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}
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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}
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// create a collection header
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res = TRI_ReserveElementDatafile(journal, sizeof(TRI_col_header_marker_t), &position);
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if (res != TRI_ERROR_NO_ERROR) {
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collection->_lastError = journal->_lastError;
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LOG_ERROR("cannot create document header in journal '%s': %s", journal->getName(journal), TRI_last_error());
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TRI_FreeDatafile(journal);
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return NULL;
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}
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memset(&cm, 0, sizeof(cm));
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cm.base._size = sizeof(TRI_col_header_marker_t);
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cm.base._type = TRI_COL_MARKER_HEADER;
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cm.base._tick = TRI_NewTickVocBase();
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cm._cid = collection->_info._cid;
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TRI_FillCrcMarkerDatafile(journal, &cm.base, sizeof(cm), 0, 0, 0, 0);
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res = TRI_WriteElementDatafile(journal, position, &cm.base, sizeof(cm), 0, 0, 0, 0, true);
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if (res != TRI_ERROR_NO_ERROR) {
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collection->_lastError = journal->_lastError;
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LOG_ERROR("cannot create document header in journal '%s': %s", journal->getName(journal), TRI_last_error());
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TRI_FreeDatafile(journal);
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return NULL;
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}
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// that's it
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if (compactor) {
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TRI_PushBackVectorPointer(&collection->_compactors, journal);
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}
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else {
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TRI_PushBackVectorPointer(&collection->_journals, journal);
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}
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return journal;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief closes a journal
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///
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/// Note that the caller must hold a lock protecting the _datafiles and
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/// _journals entry.
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////////////////////////////////////////////////////////////////////////////////
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static bool CloseJournalPrimaryCollection (TRI_primary_collection_t* primary,
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size_t position,
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bool compactor) {
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TRI_datafile_t* journal;
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TRI_collection_t* collection;
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TRI_vector_pointer_t* vector;
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int res;
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collection = &primary->base;
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// either use a journal or a compactor
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if (compactor) {
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vector = &collection->_compactors;
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}
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else {
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vector = &collection->_journals;
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}
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// no journal at this position
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if (vector->_length <= position) {
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TRI_set_errno(TRI_ERROR_ARANGO_NO_JOURNAL);
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return false;
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}
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// seal and rename datafile
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journal = vector->_buffer[position];
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res = TRI_SealDatafile(journal);
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if (res != TRI_ERROR_NO_ERROR) {
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LOG_ERROR("failed to seal datafile '%s': %s", journal->getName(journal), TRI_last_error());
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TRI_RemoveVectorPointer(vector, position);
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TRI_PushBackVectorPointer(&collection->_datafiles, journal);
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return false;
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}
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if (journal->isPhysical(journal)) {
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// rename the file
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char* dname;
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char* filename;
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char* number;
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bool ok;
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number = TRI_StringUInt32(journal->_fid);
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dname = TRI_Concatenate3String("datafile-", number, ".db");
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filename = TRI_Concatenate2File(collection->_directory, dname);
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TRI_FreeString(TRI_CORE_MEM_ZONE, dname);
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TRI_FreeString(TRI_CORE_MEM_ZONE, number);
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ok = TRI_RenameDatafile(journal, filename);
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if (! ok) {
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LOG_ERROR("failed to rename datafile '%s' to '%s': %s", journal->getName(journal), filename, TRI_last_error());
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TRI_RemoveVectorPointer(vector, position);
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TRI_PushBackVectorPointer(&collection->_datafiles, journal);
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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return false;
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}
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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LOG_TRACE("closed journal '%s'", journal->getName(journal));
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}
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TRI_RemoveVectorPointer(vector, position);
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TRI_PushBackVectorPointer(&collection->_datafiles, journal);
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief free an assoc array of datafile infos
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////////////////////////////////////////////////////////////////////////////////
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static void FreeDatafileInfo (TRI_associative_pointer_t* const files) {
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size_t i;
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size_t n;
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n = files->_nrAlloc;
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for (i = 0; i < n; ++i) {
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TRI_doc_datafile_info_t* file = files->_table[i];
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if (!file) {
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continue;
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}
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, file);
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}
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TRI_DestroyAssociativePointer(files);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns information about the collection
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////////////////////////////////////////////////////////////////////////////////
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static TRI_doc_collection_info_t* Figures (TRI_primary_collection_t* primary) {
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TRI_doc_collection_info_t* info;
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TRI_collection_t* base;
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size_t i;
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// prefill with 0's to init counters
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info = TRI_Allocate(TRI_UNKNOWN_MEM_ZONE, sizeof(TRI_doc_collection_info_t), true);
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if (info == NULL) {
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return NULL;
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}
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primary->beginRead(primary);
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for (i = 0; i < primary->_datafileInfo._nrAlloc; ++i) {
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TRI_doc_datafile_info_t* d = primary->_datafileInfo._table[i];
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if (d != NULL) {
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info->_numberAlive += d->_numberAlive;
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info->_numberDead += d->_numberDead;
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info->_sizeAlive += d->_sizeAlive;
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info->_sizeDead += d->_sizeDead;
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info->_numberDeletion += d->_numberDeletion;
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}
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}
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// add the file sizes for datafiles and journals
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base = &primary->base;
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for (i = 0; i < base->_datafiles._length; ++i) {
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TRI_datafile_t* df = (TRI_datafile_t*) base->_datafiles._buffer[i];
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info->_datafileSize += df->_maximalSize;
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++info->_numberDatafiles;
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}
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for (i = 0; i < base->_journals._length; ++i) {
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TRI_datafile_t* df = (TRI_datafile_t*) base->_journals._buffer[i];
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info->_journalfileSize += df->_maximalSize;
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++info->_numberJournalfiles;
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}
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primary->endRead(primary);
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return info;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief size of a primary collection
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////////////////////////////////////////////////////////////////////////////////
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static TRI_voc_size_t Count (TRI_primary_collection_t* primary) {
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TRI_doc_mptr_t const* mptr;
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TRI_voc_size_t result;
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void** end;
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void** ptr;
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TRI_READ_LOCK_DOCUMENTS_INDEXES_PRIMARY_COLLECTION(primary);
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ptr = primary->_primaryIndex._table;
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end = ptr + primary->_primaryIndex._nrAlloc;
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result = 0;
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for (; ptr < end; ++ptr) {
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if (*ptr != NULL) {
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mptr = *ptr;
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if (mptr->_validTo == 0) {
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++result;
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}
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}
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}
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TRI_READ_UNLOCK_DOCUMENTS_INDEXES_PRIMARY_COLLECTION(primary);
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return result;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors and destructors
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup VocBase
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initialises a primary collection
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////////////////////////////////////////////////////////////////////////////////
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int TRI_InitPrimaryCollection (TRI_primary_collection_t* primary,
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TRI_shaper_t* shaper) {
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int res;
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primary->_shaper = shaper;
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primary->_capConstraint = NULL;
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primary->_keyGenerator = NULL;
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primary->figures = Figures;
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primary->size = Count;
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TRI_InitBarrierList(&primary->_barrierList, primary);
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TRI_InitAssociativePointer(&primary->_datafileInfo,
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TRI_UNKNOWN_MEM_ZONE,
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HashKeyDatafile,
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HashElementDatafile,
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IsEqualKeyElementDatafile,
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NULL);
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TRI_InitAssociativePointer(&primary->_primaryIndex,
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TRI_UNKNOWN_MEM_ZONE,
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HashKeyHeader,
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HashElementDocument,
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IsEqualKeyDocument,
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0);
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TRI_InitReadWriteLock(&primary->_lock);
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// init key generator
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res = TRI_CreateKeyGenerator(primary->base._info._options, primary);
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return res;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destroys a primary collection
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////////////////////////////////////////////////////////////////////////////////
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void TRI_DestroyPrimaryCollection (TRI_primary_collection_t* primary) {
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if (primary->_keyGenerator != NULL) {
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TRI_FreeKeyGenerator(primary->_keyGenerator);
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}
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TRI_DestroyReadWriteLock(&primary->_lock);
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TRI_DestroyAssociativePointer(&primary->_primaryIndex);
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if (primary->_shaper != NULL) {
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TRI_FreeVocShaper(primary->_shaper);
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}
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FreeDatafileInfo(&primary->_datafileInfo);
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TRI_DestroyBarrierList(&primary->_barrierList);
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TRI_DestroyCollection(&primary->base);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- protected functions
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|
// -----------------------------------------------------------------------------
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|
|
|
////////////////////////////////////////////////////////////////////////////////
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|
/// @addtogroup VocBase
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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|
|
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////////////////////////////////////////////////////////////////////////////////
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/// @brief finds a datafile description
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////////////////////////////////////////////////////////////////////////////////
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TRI_doc_datafile_info_t* TRI_FindDatafileInfoPrimaryCollection (TRI_primary_collection_t* primary,
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TRI_voc_fid_t fid) {
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TRI_doc_datafile_info_t const* found;
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TRI_doc_datafile_info_t* dfi;
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found = TRI_LookupByKeyAssociativePointer(&primary->_datafileInfo, &fid);
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if (found != NULL) {
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union { TRI_doc_datafile_info_t const* c; TRI_doc_datafile_info_t* v; } cnv;
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cnv.c = found;
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return cnv.v;
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}
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dfi = TRI_Allocate(TRI_UNKNOWN_MEM_ZONE, sizeof(TRI_doc_datafile_info_t), true);
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if (dfi == NULL) {
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return NULL;
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}
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dfi->_fid = fid;
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TRI_InsertKeyAssociativePointer(&primary->_datafileInfo, &fid, dfi, true);
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return dfi;
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}
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|
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates a journal
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///
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/// Note that the caller must hold a lock protecting the _journals entry.
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////////////////////////////////////////////////////////////////////////////////
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TRI_datafile_t* TRI_CreateJournalPrimaryCollection (TRI_primary_collection_t* primary) {
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return CreateJournal(primary, false);
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}
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|
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////////////////////////////////////////////////////////////////////////////////
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/// @brief closes a journal
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///
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/// Note that the caller must hold a lock protecting the _datafiles and
|
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/// _journals entry.
|
|
////////////////////////////////////////////////////////////////////////////////
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|
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bool TRI_CloseJournalPrimaryCollection (TRI_primary_collection_t* primary,
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size_t position) {
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return CloseJournalPrimaryCollection(primary, position, false);
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}
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|
|
////////////////////////////////////////////////////////////////////////////////
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|
/// @brief creates a new compactor file
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///
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/// Note that the caller must hold a lock protecting the _journals entry.
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////////////////////////////////////////////////////////////////////////////////
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|
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TRI_datafile_t* TRI_CreateCompactorPrimaryCollection (TRI_primary_collection_t* primary) {
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return CreateJournal(primary, true);
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|
}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief closes an existing compactor file
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///
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|
/// Note that the caller must hold a lock protecting the _datafiles and
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|
/// _journals entry.
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////////////////////////////////////////////////////////////////////////////////
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bool TRI_CloseCompactorPrimaryCollection (TRI_primary_collection_t* primary,
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|
size_t position) {
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|
return CloseJournalPrimaryCollection(primary, position, true);
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|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
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|
/// @brief initialise a new operation context
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|
////////////////////////////////////////////////////////////////////////////////
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|
|
|
void TRI_InitContextPrimaryCollection (TRI_doc_operation_context_t* const context,
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|
TRI_primary_collection_t* const primary,
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|
TRI_doc_update_policy_e policy,
|
|
bool forceSync) {
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|
context->_collection = primary;
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|
context->_policy = policy;
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|
context->_expectedRid = 0;
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|
context->_previousRid = NULL;
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|
context->_sync = forceSync || primary->base._info._waitForSync;
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|
context->_allowRollback = true;
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|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief initialise a new operation context for reads
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_InitReadContextPrimaryCollection (TRI_doc_operation_context_t* const context,
|
|
TRI_primary_collection_t* const primary) {
|
|
context->_collection = primary;
|
|
context->_policy = TRI_DOC_UPDATE_LAST_WRITE;
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|
context->_expectedRid = 0;
|
|
context->_previousRid = NULL;
|
|
context->_sync = false;
|
|
context->_allowRollback = false;
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|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief compare revision of found document with revision specified in policy
|
|
/// this will also store the actual revision id found in the database in the
|
|
/// context variable _previousRid, but only if this is not NULL
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int TRI_RevisionCheck (const TRI_doc_operation_context_t* const context,
|
|
const TRI_voc_rid_t actualRid) {
|
|
|
|
// store previous revision
|
|
if (context->_previousRid != NULL) {
|
|
*(context->_previousRid) = actualRid;
|
|
}
|
|
|
|
// check policy
|
|
switch (context->_policy) {
|
|
case TRI_DOC_UPDATE_ERROR:
|
|
if (context->_expectedRid != 0 && context->_expectedRid != actualRid) {
|
|
return TRI_ERROR_ARANGO_CONFLICT;
|
|
}
|
|
break;
|
|
|
|
case TRI_DOC_UPDATE_CONFLICT:
|
|
return TRI_ERROR_NOT_IMPLEMENTED;
|
|
|
|
case TRI_DOC_UPDATE_ILLEGAL:
|
|
return TRI_ERROR_INTERNAL;
|
|
|
|
case TRI_DOC_UPDATE_LAST_WRITE:
|
|
return TRI_ERROR_NO_ERROR;
|
|
}
|
|
|
|
return TRI_ERROR_NO_ERROR;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
|
|
// End:
|