1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "modules/webdatabase/DatabaseSync.h" 33 34 #include "bindings/v8/ExceptionState.h" 35 #include "core/dom/ExceptionCode.h" 36 #include "core/dom/ExecutionContext.h" 37 #include "platform/Logging.h" 38 #include "modules/webdatabase/DatabaseCallback.h" 39 #include "modules/webdatabase/DatabaseContext.h" 40 #include "modules/webdatabase/DatabaseManager.h" 41 #include "modules/webdatabase/DatabaseTracker.h" 42 #include "modules/webdatabase/SQLError.h" 43 #include "modules/webdatabase/SQLTransactionSync.h" 44 #include "modules/webdatabase/SQLTransactionSyncCallback.h" 45 #include "wtf/PassRefPtr.h" 46 #include "wtf/RefPtr.h" 47 #include "wtf/text/CString.h" 48 49 namespace WebCore { 50 51 PassRefPtrWillBeRawPtr<DatabaseSync> DatabaseSync::create(ExecutionContext*, PassRefPtrWillBeRawPtr<DatabaseBackendBase> backend) 52 { 53 return static_cast<DatabaseSync*>(backend.get()); 54 } 55 56 DatabaseSync::DatabaseSync(DatabaseContext* databaseContext, 57 const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize) 58 : DatabaseBackendSync(databaseContext, name, expectedVersion, displayName, estimatedSize) 59 , DatabaseBase(databaseContext->executionContext()) 60 { 61 ScriptWrappable::init(this); 62 setFrontend(this); 63 } 64 65 DatabaseSync::~DatabaseSync() 66 { 67 if (executionContext()) 68 ASSERT(executionContext()->isContextThread()); 69 } 70 71 void DatabaseSync::trace(Visitor* visitor) 72 { 73 DatabaseBackendSync::trace(visitor); 74 } 75 76 void DatabaseSync::changeVersion(const String& oldVersion, const String& newVersion, PassOwnPtr<SQLTransactionSyncCallback> changeVersionCallback, ExceptionState& exceptionState) 77 { 78 ASSERT(executionContext()->isContextThread()); 79 80 if (sqliteDatabase().transactionInProgress()) { 81 reportChangeVersionResult(1, SQLError::DATABASE_ERR, 0); 82 setLastErrorMessage("unable to changeVersion from within a transaction"); 83 exceptionState.throwDOMException(SQLDatabaseError, "Unable to change version from within a transaction."); 84 return; 85 } 86 87 RefPtrWillBeRawPtr<SQLTransactionSync> transaction = SQLTransactionSync::create(this, changeVersionCallback, false); 88 transaction->begin(exceptionState); 89 if (exceptionState.hadException()) { 90 ASSERT(!lastErrorMessage().isEmpty()); 91 return; 92 } 93 94 String actualVersion; 95 if (!getVersionFromDatabase(actualVersion)) { 96 reportChangeVersionResult(2, SQLError::UNKNOWN_ERR, sqliteDatabase().lastError()); 97 setLastErrorMessage("unable to read the current version", sqliteDatabase().lastError(), sqliteDatabase().lastErrorMsg()); 98 exceptionState.throwDOMException(UnknownError, SQLError::unknownErrorMessage); 99 return; 100 } 101 102 if (actualVersion != oldVersion) { 103 reportChangeVersionResult(3, SQLError::VERSION_ERR, 0); 104 setLastErrorMessage("current version of the database and `oldVersion` argument do not match"); 105 exceptionState.throwDOMException(VersionError, SQLError::versionErrorMessage); 106 return; 107 } 108 109 110 transaction->execute(exceptionState); 111 if (exceptionState.hadException()) { 112 ASSERT(!lastErrorMessage().isEmpty()); 113 return; 114 } 115 116 if (!setVersionInDatabase(newVersion)) { 117 reportChangeVersionResult(4, SQLError::UNKNOWN_ERR, sqliteDatabase().lastError()); 118 setLastErrorMessage("unable to set the new version", sqliteDatabase().lastError(), sqliteDatabase().lastErrorMsg()); 119 exceptionState.throwDOMException(UnknownError, SQLError::unknownErrorMessage); 120 return; 121 } 122 123 transaction->commit(exceptionState); 124 if (exceptionState.hadException()) { 125 ASSERT(!lastErrorMessage().isEmpty()); 126 setCachedVersion(oldVersion); 127 return; 128 } 129 130 reportChangeVersionResult(0, -1, 0); // OK 131 132 setExpectedVersion(newVersion); 133 setLastErrorMessage(""); 134 } 135 136 void DatabaseSync::transaction(PassOwnPtr<SQLTransactionSyncCallback> callback, ExceptionState& exceptionState) 137 { 138 runTransaction(callback, false, exceptionState); 139 } 140 141 void DatabaseSync::readTransaction(PassOwnPtr<SQLTransactionSyncCallback> callback, ExceptionState& exceptionState) 142 { 143 runTransaction(callback, true, exceptionState); 144 } 145 146 void DatabaseSync::rollbackTransaction(SQLTransactionSync& transaction) 147 { 148 ASSERT(!lastErrorMessage().isEmpty()); 149 transaction.rollback(); 150 setLastErrorMessage(""); 151 return; 152 } 153 154 void DatabaseSync::runTransaction(PassOwnPtr<SQLTransactionSyncCallback> callback, bool readOnly, ExceptionState& exceptionState) 155 { 156 ASSERT(executionContext()->isContextThread()); 157 158 if (sqliteDatabase().transactionInProgress()) { 159 setLastErrorMessage("unable to start a transaction from within a transaction"); 160 exceptionState.throwDOMException(SQLDatabaseError, "Unable to start a transaction from within a transaction."); 161 return; 162 } 163 164 RefPtrWillBeRawPtr<SQLTransactionSync> transaction = SQLTransactionSync::create(this, callback, readOnly); 165 transaction->begin(exceptionState); 166 if (exceptionState.hadException()) { 167 rollbackTransaction(*transaction); 168 return; 169 } 170 171 transaction->execute(exceptionState); 172 if (exceptionState.hadException()) { 173 rollbackTransaction(*transaction); 174 return; 175 } 176 177 transaction->commit(exceptionState); 178 if (exceptionState.hadException()) { 179 rollbackTransaction(*transaction); 180 return; 181 } 182 183 setLastErrorMessage(""); 184 } 185 186 void DatabaseSync::closeImmediately() 187 { 188 ASSERT(executionContext()->isContextThread()); 189 190 if (!opened()) 191 return; 192 193 logErrorMessage("forcibly closing database"); 194 closeDatabase(); 195 } 196 197 void DatabaseSync::observeTransaction(SQLTransactionSync& transaction) 198 { 199 #if ENABLE(OILPAN) 200 m_observers.add(&transaction, adoptPtr(new TransactionObserver(transaction))); 201 #endif 202 } 203 204 #if ENABLE(OILPAN) 205 DatabaseSync::TransactionObserver::~TransactionObserver() 206 { 207 m_transaction.rollbackIfInProgress(); 208 } 209 #endif 210 211 } // namespace WebCore 212
