C# BerkeleyDB.QueueDatabaseConfig类代码示例

        public void OpenSecQueueDB(string className, 
		    string funName, string dbFileName, string dbSecFileName)
        {
            XmlElement xmlElem = Configuration.TestSetUp(
                className, funName);

            // Open a primary queue database.
            QueueDatabaseConfig primaryDBConfig =
                new QueueDatabaseConfig();
            primaryDBConfig.Creation = CreatePolicy.IF_NEEDED;
            QueueDatabase primaryDB;

            /*
             * If secondary database name is given, the primary
             * database is also opened with database name.
             */
            primaryDB = QueueDatabase.Open(dbFileName,
                primaryDBConfig);

            try
            {
                // Open a new secondary database.
                SecondaryQueueDatabaseConfig secQueueDBConfig =
                    new SecondaryQueueDatabaseConfig(
                    primaryDB, null);
                SecondaryQueueDatabaseConfigTest.Config(
                    xmlElem, ref secQueueDBConfig, false);
                secQueueDBConfig.Creation =
                    CreatePolicy.IF_NEEDED;

                SecondaryQueueDatabase secQueueDB;
                secQueueDB = SecondaryQueueDatabase.Open(
                    dbSecFileName, secQueueDBConfig);

                // Close the secondary database.
                secQueueDB.Close();

                // Open the existing secondary database.
                SecondaryDatabaseConfig secDBConfig =
                    new SecondaryQueueDatabaseConfig(
                    primaryDB, null);

                SecondaryDatabase secDB;
                secDB = SecondaryQueueDatabase.Open(
                    dbSecFileName, secDBConfig);

                // Close secondary database.
                secDB.Close();
            }
            catch (DatabaseException)
            {
                throw new TestException();
            }
            finally
            {
                // Close primary database.
                primaryDB.Close();
            }
        }

 public void ConfigCase1(QueueDatabaseConfig dbConfig)
 {
     dbConfig.Creation = CreatePolicy.IF_NEEDED;
     dbConfig.PageSize = 4096;
     dbConfig.ExtentSize = 1024;
     dbConfig.Length = 4000;
     dbConfig.PadByte = 32;
 }

        private void Config(QueueDatabaseConfig cfg) {
            base.Config(cfg);
            /* 
             * Database.Config calls set_flags, but that doesn't get the Queue
             * specific flags.  No harm in calling it again.
             */
            db.set_flags(cfg.flags);
            
            db.set_re_len(cfg.Length);

            if (cfg.padIsSet)
                db.set_re_pad(cfg.PadByte);
            if (cfg.extentIsSet)
                db.set_q_extentsize(cfg.ExtentSize);
        }

        public static void Confirm(XmlElement xmlElement,
		    QueueDatabaseConfig queueDBConfig, bool compulsory)
        {
            DatabaseConfig dbConfig = queueDBConfig;
            Confirm(xmlElement, dbConfig, compulsory);

            // Confirm Queue database specific configuration
            Configuration.ConfirmBool(xmlElement, "ConsumeInOrder",
                queueDBConfig.ConsumeInOrder, compulsory);
            Configuration.ConfirmCreatePolicy(xmlElement, "Creation",
                queueDBConfig.Creation, compulsory);
            Configuration.ConfirmUint(xmlElement, "Length",
                queueDBConfig.Length, compulsory);
            Configuration.ConfirmInt(xmlElement, "PadByte",
                queueDBConfig.PadByte, compulsory);
            Configuration.ConfirmUint(xmlElement, "ExtentSize",
                queueDBConfig.ExtentSize, compulsory);
        }

 public void GetCursur(string dbFileName, bool ifConfig)
 {
     QueueDatabaseConfig dbConfig = new QueueDatabaseConfig();
     dbConfig.Creation = CreatePolicy.IF_NEEDED;
     dbConfig.Length = 100;
     QueueDatabase db = QueueDatabase.Open(dbFileName, dbConfig);
     Cursor cursor;
     CursorConfig cursorConfig = new CursorConfig();
     cursorConfig.Priority = CachePriority.HIGH;
     if (ifConfig == false)
         cursor = db.Cursor();
     else
         cursor = db.Cursor(cursorConfig);
     cursor.Add(new KeyValuePair<DatabaseEntry,DatabaseEntry>(
         new DatabaseEntry(BitConverter.GetBytes((int)1)),
         new DatabaseEntry(BitConverter.GetBytes((int)1))));
     Cursor dupCursor = cursor.Duplicate(false);
     Assert.IsNull(dupCursor.Current.Key);
     Assert.AreEqual(CachePriority.HIGH, dupCursor.Priority);
     dupCursor.Close();
     cursor.Close();
     db.Close();
 }

        public static void Config(XmlElement xmlElement,
		    ref QueueDatabaseConfig queueDBConfig, bool compulsory)
        {
            uint uintValue = new uint();
            int intValue = new int();
            DatabaseConfig dbConfig = queueDBConfig;
            Config(xmlElement, ref dbConfig, compulsory);

            // Configure specific fields/properties of Queue database
            Configuration.ConfigBool(xmlElement, "ConsumeInOrder",
                ref queueDBConfig.ConsumeInOrder, compulsory);
            Configuration.ConfigCreatePolicy(xmlElement, "Creation",
                ref queueDBConfig.Creation, compulsory);
            if (Configuration.ConfigUint(xmlElement, "Length",
                ref uintValue, compulsory))
                queueDBConfig.Length = uintValue;
            if (Configuration.ConfigInt(xmlElement, "PadByte",
                ref intValue, compulsory))
                queueDBConfig.PadByte = intValue;
            if (Configuration.ConfigUint(xmlElement, "ExtentSize",
                ref uintValue, compulsory))
                queueDBConfig.ExtentSize = uintValue;
        }

        public void TestMessageFile()
        {
            testName = "TestMessageFile";
            SetUpTest(true);

            // Configure and open an environment.
            DatabaseEnvironmentConfig envConfig =
                new DatabaseEnvironmentConfig();
            envConfig.Create = true;
            envConfig.UseMPool = true;
            DatabaseEnvironment env = DatabaseEnvironment.Open(
                testHome, envConfig);

            // Configure and open a database.
            QueueDatabaseConfig DBConfig =
                new QueueDatabaseConfig();
            DBConfig.Env = env;
            DBConfig.Creation = CreatePolicy.IF_NEEDED;

            string DBFileName = testName + ".db";
            QueueDatabase db = QueueDatabase.Open(
                DBFileName, DBConfig);

            // Confirm message file does not exist.
            string messageFile = testHome + "/" + "msgfile";
            Assert.AreEqual(false, File.Exists(messageFile));

            // Call set_msgfile() of db.
            db.Msgfile = messageFile;

            // Print db statistic to message file.
            db.PrintStats(true);

            // Confirm message file exists now.
            Assert.AreEqual(true, File.Exists(messageFile));

            db.Msgfile = "";
            string line = null;

            // Read the third line of message file.
            System.IO.StreamReader file = new System.IO.StreamReader(@"" + messageFile);
            line = file.ReadLine();
            line = file.ReadLine();
            line = file.ReadLine();

            // Confirm the message file is not empty.
            Assert.AreEqual(line, "DB handle information:");
            file.Close();

            // Close database and environment.
            db.Close();
            env.Close();
        }

        public void TestKeyEmptyException()
        {
            testName = "TestKeyEmptyException";
            SetUpTest(true);

            DatabaseEnvironmentConfig envConfig =
                new DatabaseEnvironmentConfig();
            envConfig.Create = true;
            envConfig.UseLocking = true;
            envConfig.UseLogging = true;
            envConfig.UseMPool = true;
            envConfig.UseTxns = true;
            DatabaseEnvironment env = DatabaseEnvironment.Open(
                testHome, envConfig);

            QueueDatabase db;
            try
            {
                Transaction openTxn = env.BeginTransaction();
                try
                {
                    QueueDatabaseConfig queueConfig =
                        new QueueDatabaseConfig();
                    queueConfig.Creation = CreatePolicy.IF_NEEDED;
                    queueConfig.Length = 10;
                    queueConfig.Env = env;
                    db = QueueDatabase.Open(testName + ".db",
                        queueConfig, openTxn);
                    openTxn.Commit();
                }
                catch (DatabaseException e)
                {
                    openTxn.Abort();
                    throw e;
                }

                Transaction cursorTxn = env.BeginTransaction();
                Cursor cursor;
                try
                {
                    /*
                     * Put a record into queue database with
                     * cursor and abort the operation.
                     */
                    cursor = db.Cursor(cursorTxn);
                    KeyValuePair<DatabaseEntry, DatabaseEntry> pair;
                    pair = new KeyValuePair<DatabaseEntry, DatabaseEntry>(
                        new DatabaseEntry(BitConverter.GetBytes((int)10)),
                        new DatabaseEntry(ASCIIEncoding.ASCII.GetBytes("data")));
                    cursor.Add(pair);
                    cursor.Close();
                    cursorTxn.Abort();
                }
                catch (DatabaseException e)
                {
                    cursorTxn.Abort();
                    db.Close();
                    throw e;
                }

                Transaction delTxn = env.BeginTransaction();
                try
                {
                    /*
                     * The put operation is aborted in the queue
                     * database so querying if the record still exists
                     * throws KeyEmptyException.
                     */
                    db.Exists(new DatabaseEntry(
                        BitConverter.GetBytes((int)10)), delTxn);
                    delTxn.Commit();
                }
                catch (DatabaseException e)
                {
                    delTxn.Abort();
                    throw e;
                }
                finally
                {
                    db.Close();
                }
            }
            catch (KeyEmptyException)
            {
                throw new ExpectedTestException();
            }
            finally
            {
                env.Close();
            }
        }

 public void GetCursur(string dbFileName, bool ifConfig)
 {
     QueueDatabaseConfig dbConfig = new QueueDatabaseConfig();
     dbConfig.Creation = CreatePolicy.IF_NEEDED;
     dbConfig.Length = 100;
     QueueDatabase db = QueueDatabase.Open(dbFileName, dbConfig);
     Cursor cursor;
     if (ifConfig == false)
         cursor = db.Cursor();
     else
         cursor = db.Cursor(new CursorConfig());
     cursor.Close();
     db.Close();
 }

        public void TestDeleteMultipleKey()
        {
            testName = "TestDeleteMultipleKey";
            SetUpTest(true);

            QueueDatabaseConfig dbConfig = new QueueDatabaseConfig();
            dbConfig.Creation = CreatePolicy.IF_NEEDED;
            dbConfig.ExtentSize = 1024;
            dbConfig.Length = 520;
            QueueDatabase db = QueueDatabase.Open(testHome + "/" +
                testName + ".db", dbConfig);

            List<KeyValuePair<DatabaseEntry, DatabaseEntry>> pList =
                new List<KeyValuePair<DatabaseEntry, DatabaseEntry>>();
            DatabaseEntry key, data;

            for (uint i = 1; i <= 100; i++)
            {
                key = new DatabaseEntry(
                    BitConverter.GetBytes(i));
                data = new DatabaseEntry(
                    ASCIIEncoding.ASCII.GetBytes(
                    "data" + i.ToString() +
                    Configuration.RandomString(512)));
                pList.Add(new KeyValuePair<
                    DatabaseEntry, DatabaseEntry>(key, data));
                db.Put(key, data);
            }

            // Create key/value pair bulk buffer and delete all.
            db.Delete(new MultipleKeyDatabaseEntry(pList, true));
            // Verify that the database is empty.
            Assert.AreEqual(0, db.Truncate());
            db.Close();
        }

 /// <summary>
 /// Instantiate a new QueueDatabase object and open the database
 /// represented by <paramref name="Filename"/>.
 /// </summary>
 /// <remarks>
 /// <para>
 /// If <paramref name="Filename"/> is null, the database is strictly
 /// temporary and cannot be opened by any other thread of control, thus
 /// the database can only be accessed by sharing the single database
 /// object that created it, in circumstances where doing so is safe.
 /// </para>
 /// <para>
 /// If <paramref name="txn"/> is null, but
 /// <see cref="DatabaseConfig.AutoCommit"/> is set, the operation will
 /// be implicitly transaction protected. Note that transactionally
 /// protected operations on a datbase object requires the object itself
 /// be transactionally protected during its open. Also note that the
 /// transaction must be committed before the object is closed.
 /// </para>
 /// </remarks>
 /// <param name="Filename">
 /// The name of an underlying file that will be used to back the
 /// database. In-memory databases never intended to be preserved on disk
 /// may be created by setting this parameter to null.
 /// </param>
 /// <param name="cfg">The database's configuration</param>
 /// <param name="txn">
 /// If the operation is part of an application-specified transaction,
 /// <paramref name="txn"/> is a Transaction object returned from
 /// <see cref="DatabaseEnvironment.BeginTransaction"/>; if
 /// the operation is part of a Berkeley DB Concurrent Data Store group,
 /// <paramref name="txn"/> is a handle returned from
 /// <see cref="DatabaseEnvironment.BeginCDSGroup"/>; otherwise null.
 /// </param>
 /// <returns>A new, open database object</returns>
 public static QueueDatabase Open(
     string Filename, QueueDatabaseConfig cfg, Transaction txn)
 {
     QueueDatabase ret = new QueueDatabase(cfg.Env, 0);
     ret.Config(cfg);
     ret.db.open(Transaction.getDB_TXN(txn),
         Filename, null, DBTYPE.DB_QUEUE, cfg.openFlags, 0);
     ret.isOpen = true;
     return ret;
 }

        public void TestStats()
        {
            testName = "TestStats";
            SetUpTest(true);
            string dbFileName = testHome + "/" +
                testName + ".db";

            QueueDatabaseConfig dbConfig =
                new QueueDatabaseConfig();
            ConfigCase1(dbConfig);
            QueueDatabase db = QueueDatabase.Open(dbFileName, dbConfig);

            QueueStats stats = db.Stats();
            ConfirmStatsPart1Case1(stats);
            db.Msgfile = testHome + "/" + testName+ ".log";
            db.PrintFastStats(true);

            // Put 500 records into the database.
            PutRecordCase1(db, null);

            stats = db.Stats();
            ConfirmStatsPart2Case1(stats);
            db.PrintFastStats();

            db.Close();
        }

        public void TestPutMultiple()
        {
            testName = "TestPutMultiple";
            SetUpTest(true);

            QueueDatabaseConfig dbConfig = new QueueDatabaseConfig();
            dbConfig.Creation = CreatePolicy.IF_NEEDED;
            dbConfig.ExtentSize = 1024;
            dbConfig.Length = 520;
            dbConfig.PadByte = 0;
            QueueDatabase db = QueueDatabase.Open(testHome + "/" +
                testName + ".db", dbConfig);

            List<uint> kList = new List<uint>();
            List<DatabaseEntry> vList = new List<DatabaseEntry>();
            DatabaseEntry key, data;
            for (uint i = 1; i <= 9;i++) {
                key = new DatabaseEntry(BitConverter.GetBytes(i));
                data = new DatabaseEntry(
                    ASCIIEncoding.ASCII.GetBytes("data" + i +
                    Configuration.RandomString(512)));
                kList.Add(i);
                vList.Add(data);
            }

            // Create bulk buffer for recno based keys.
            MultipleDatabaseEntry kBuff =
                new MultipleDatabaseEntry(kList);
            Assert.IsTrue(kBuff.Recno);
            int val = 0;
            foreach (DatabaseEntry dbt in kBuff) {
                Assert.AreEqual(
                    BitConverter.GetBytes(kList[val]),
                    dbt.Data);
                val++;
            }
            Assert.AreEqual(9, val);

            // Create bulk buffer for data.
            MultipleDatabaseEntry vBuff =
                new MultipleDatabaseEntry(vList, false);

            /*
             * Create recno bulk buffer from another recno bulk
             * buffer.
             */
            MultipleDatabaseEntry kBuff1 =
                new MultipleDatabaseEntry(kBuff.Data, kBuff.Recno);
            val = 0;
            foreach (DatabaseEntry dbt in kBuff1) {
                Assert.AreEqual(
                    BitConverter.GetBytes(kList[val]),
                    dbt.Data);
                val++;
            }
            Assert.AreEqual(9, val);

            // Bulk insert to database with key and value buffers.
            db.Put(kBuff, vBuff);
            Cursor cursor = db.Cursor();
            KeyValuePair<DatabaseEntry, DatabaseEntry> pair;
            val = 0;
            while (cursor.MoveNext()) {
                pair = cursor.Current;
                Assert.AreEqual(
                    BitConverter.GetBytes(kList[val]),
                    pair.Key.Data);
                for (int i = 0; i < 520; i++) {
                    if (i < vList[val].Data.Length)
                        Assert.AreEqual(vList[val].Data[i],
                            pair.Value.Data[i]);
                    else
                        // The pad byte is 0.
                        Assert.AreEqual(0, pair.Value.Data[i]);
                }
                Assert.IsFalse(cursor.MoveNextDuplicate());
                val++;
            }
            Assert.AreEqual(9, val);

            cursor.Close();
            db.Close();
        }

        public void TestAppendWithTxn()
        {
            testName = "TestAppendWithTxn";
            SetUpTest(true);
            string queueDBFileName = testHome + "/" + testName + ".db";
            string queueDBName =
                Path.GetFileNameWithoutExtension(queueDBFileName);

            DatabaseEnvironmentConfig envConfig =
                new DatabaseEnvironmentConfig();
            envConfig.Create = true;
            envConfig.UseTxns = true;
            envConfig.UseMPool = true;

            DatabaseEnvironment env = DatabaseEnvironment.Open(
                testHome, envConfig);
            Transaction txn = env.BeginTransaction();

            QueueDatabaseConfig queueConfig = new QueueDatabaseConfig();
            queueConfig.Creation = CreatePolicy.ALWAYS;
            queueConfig.Env = env;
            queueConfig.Length = 1000;

            /* If environmnet home is set, the file name in
             * Open() is the relative path.
             */
            QueueDatabase queueDB = QueueDatabase.Open(
                queueDBName, queueConfig, txn);
            DatabaseEntry data;
            int i = 1000;
            try
            {
                while (i > 0)
                {
                    data = new DatabaseEntry(
                        BitConverter.GetBytes(i));
                    queueDB.Append(data, txn);
                    i--;
                }
                txn.Commit();
            }
            catch
            {
                txn.Abort();
            }
            finally
            {
                queueDB.Close();
                env.Close();
            }
        }

        public void TestAppendWithoutTxn()
        {
            testName = "TestAppendWithoutTxn";
            SetUpTest(true);
            string queueDBFileName = testHome + "/" + testName + ".db";

            QueueDatabaseConfig queueConfig = new QueueDatabaseConfig();
            queueConfig.Creation = CreatePolicy.ALWAYS;
            queueConfig.Length = 1000;
            QueueDatabase queueDB = QueueDatabase.Open(
                queueDBFileName, queueConfig);

            byte[] byteArr = new byte[4];
            byteArr = BitConverter.GetBytes((int)1);
            DatabaseEntry data = new DatabaseEntry(byteArr);
            uint recno = queueDB.Append(data);

            // Confirm that the recno is larger than 0.
            Assert.AreNotEqual(0, recno);

            // Confirm that the record exists in the database.
            byteArr = BitConverter.GetBytes(recno);
            DatabaseEntry key = new DatabaseEntry();
            key.Data = byteArr;
            Assert.IsTrue(queueDB.Exists(key));
            queueDB.Close();
        }