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DbStoreTest.javaAPI DocApache Lucene 2.2.011867Sat Jun 16 22:20:56 BST 2007org.apache.lucene.store.db

DbStoreTest

public class DbStoreTest extends TestCase
Tests {@link DbDirectory}. Adapted from org.apache.lucene.StoreTest with larger files and random bytes.
author
Andi Vajda

Fields Summary
protected File
dbHome
protected com.sleepycat.db.Environment
env
protected com.sleepycat.db.Database
index
protected com.sleepycat.db.Database
blocks
Constructors Summary
Methods Summary
public voidsetUp()

    
      
         
    
        if (!dbHome.exists())
            dbHome.mkdir();
        else
        {
            File[] files = dbHome.listFiles();

            for (int i = 0; i < files.length; i++) {
                String name = files[i].getName();
                if (name.startsWith("__") || name.startsWith("log."))
                    files[i].delete();
            }
        }

        EnvironmentConfig envConfig = new EnvironmentConfig();
        DatabaseConfig dbConfig = new DatabaseConfig();

        envConfig.setTransactional(true);
        envConfig.setInitializeCache(true);
        envConfig.setInitializeLocking(true);
        envConfig.setInitializeLogging(true);
        envConfig.setAllowCreate(true);
        envConfig.setThreaded(true);
        dbConfig.setAllowCreate(true);
        dbConfig.setType(DatabaseType.BTREE);

        env = new Environment(dbHome, envConfig);

        Transaction txn = null;

        try {
            txn = env.beginTransaction(null, null);
            index = env.openDatabase(txn, "__index__", null, dbConfig);
            blocks = env.openDatabase(txn, "__blocks__", null, dbConfig);
        } catch (DatabaseException e) {
            if (txn != null)
            {
                txn.abort();
                txn = null;
            }
            index = null;
            blocks = null;
            throw e;
        } finally {
            if (txn != null)
                txn.commit();
            txn = null;
        }
    
public voidtearDown()

        if (index != null)
            index.close();
        if (blocks != null)
            blocks.close();
        if (env != null)
            env.close();
    
public voidtestArrays()

        final int count = 250;
        final int LENGTH_MASK = 0xffff;

        Random gen = new Random(1251971);
        int totalLength = 0;
        int duration;
        Date end;
    
        Date veryStart = new Date();
        Date start = new Date();
        Transaction txn = null;
        Directory store = null;

        System.out.println("Writing files as one byte array");

        try {
            txn = env.beginTransaction(null, null);
            store = new DbDirectory(txn, index, blocks);

            for (int i = 0; i < count; i++) {
                String name = i + ".dat";
                int length = gen.nextInt() & LENGTH_MASK;
                IndexOutput file = store.createOutput(name);
                byte[] data = new byte[length];

                totalLength += length;
                gen.nextBytes(data);
                file.writeBytes(data, length);
      
                file.close();
            }
        } catch (IOException e) {
            txn.abort();
            txn = null;
            throw e;
        } catch (DatabaseException e) {
            if (txn != null)
            {
                txn.abort();
                txn = null;
            }
            throw e;
        } finally {
            if (txn != null)
                txn.commit();

            store.close();
        }

        end = new Date();

        duration = (int) (end.getTime() - start.getTime());
        System.out.print(duration);
        System.out.print(" total milliseconds to create, ");
        System.out.print(totalLength / duration);
        System.out.println(" kb/s");

        try {
            txn = env.beginTransaction(null, null);
            store = new DbDirectory(txn, index, blocks);

            gen = new Random(1251971);
            start = new Date();

            for (int i = 0; i < count; i++) {
                String name = i + ".dat";
                int length = gen.nextInt() & LENGTH_MASK;
                IndexInput file = store.openInput(name);
                
                if (file.length() != length)
                    throw new Exception("length incorrect");

                byte[] data = new byte[length];
                byte[] read = new byte[length];
                gen.nextBytes(data);
                file.readBytes(read, 0, length);

                if (!Arrays.equals(data, read))
                    throw new Exception("contents incorrect");

                file.close();
            }
        } catch (IOException e) {
            txn.abort();
            txn = null;
            throw e;
        } catch (DatabaseException e) {
            if (txn != null)
            {
                txn.abort();
                txn = null;
            }
            throw e;
        } finally {
            if (txn != null)
                txn.commit();

            store.close();
        }

        end = new Date();

        duration = (int) (end.getTime() - start.getTime());
        System.out.print(duration);
        System.out.print(" total milliseconds to read, ");
        System.out.print(totalLength / duration);
        System.out.println(" kb/s");

        try {
            txn = env.beginTransaction(null, null);
            store = new DbDirectory(txn, index, blocks);

            gen = new Random(1251971);
            start = new Date();

            for (int i = 0; i < count; i++) {
                String name = i + ".dat";
                store.deleteFile(name);
            }
        } catch (IOException e) {
            txn.abort();
            txn = null;
            throw e;
        } catch (DatabaseException e) {
            if (txn != null)
            {
                txn.abort();
                txn = null;
            }
            throw e;
        } finally {
            if (txn != null)
                txn.commit();

            store.close();
        }

        end = new Date();

        System.out.print(end.getTime() - start.getTime());
        System.out.println(" total milliseconds to delete");

        System.out.print(end.getTime() - veryStart.getTime());
        System.out.println(" total milliseconds");
    
public voidtestBytes()

        final int count = 250;
        final int LENGTH_MASK = 0xffff;

        Random gen = new Random(1251971);
        int totalLength = 0;
        int duration;
        Date end;
    
        Date veryStart = new Date();
        Date start = new Date();
        Transaction txn = null;
        Directory store = null;

        System.out.println("Writing files byte by byte");

        try {
            txn = env.beginTransaction(null, null);
            store = new DbDirectory(txn, index, blocks);

            for (int i = 0; i < count; i++) {
                String name = i + ".dat";
                int length = gen.nextInt() & LENGTH_MASK;
                IndexOutput file = store.createOutput(name);

                totalLength += length;

                for (int j = 0; j < length; j++) {
                    byte b = (byte)(gen.nextInt() & 0x7F);
                    file.writeByte(b);
                }
      
                file.close();
            }
        } catch (IOException e) {
            txn.abort();
            txn = null;
            throw e;
        } catch (DatabaseException e) {
            if (txn != null)
            {
                txn.abort();
                txn = null;
            }
            throw e;
        } finally {
            if (txn != null)
                txn.commit();

            store.close();
        }

        end = new Date();

        duration = (int) (end.getTime() - start.getTime());
        System.out.print(duration);
        System.out.print(" total milliseconds to create, ");
        System.out.print(totalLength / duration);
        System.out.println(" kb/s");

        try {
            txn = env.beginTransaction(null, null);
            store = new DbDirectory(txn, index, blocks);

            gen = new Random(1251971);
            start = new Date();

            for (int i = 0; i < count; i++) {
                String name = i + ".dat";
                int length = gen.nextInt() & LENGTH_MASK;
                IndexInput file = store.openInput(name);

                if (file.length() != length)
                    throw new Exception("length incorrect");

                for (int j = 0; j < length; j++) {
                    byte b = (byte)(gen.nextInt() & 0x7F);

                    if (file.readByte() != b)
                        throw new Exception("contents incorrect");
                }

                file.close();
            }
        } catch (IOException e) {
            txn.abort();
            txn = null;
            throw e;
        } catch (DatabaseException e) {
            if (txn != null)
            {
                txn.abort();
                txn = null;
            }
            throw e;
        } finally {
            if (txn != null)
                txn.commit();

            store.close();
        }

        end = new Date();

        duration = (int) (end.getTime() - start.getTime());
        System.out.print(duration);
        System.out.print(" total milliseconds to read, ");
        System.out.print(totalLength / duration);
        System.out.println(" kb/s");

        try {
            txn = env.beginTransaction(null, null);
            store = new DbDirectory(txn, index, blocks);

            gen = new Random(1251971);
            start = new Date();

            for (int i = 0; i < count; i++) {
                String name = i + ".dat";
                store.deleteFile(name);
            }
        } catch (IOException e) {
            txn.abort();
            txn = null;
            throw e;
        } catch (DatabaseException e) {
            if (txn != null)
            {
                txn.abort();
                txn = null;
            }
            throw e;
        } finally {
            if (txn != null)
                txn.commit();

            store.close();
        }

        end = new Date();

        System.out.print(end.getTime() - start.getTime());
        System.out.println(" total milliseconds to delete");

        System.out.print(end.getTime() - veryStart.getTime());
        System.out.println(" total milliseconds");