Examples of com.sleepycat.je.Transaction

com.sleepycat.je.Transaction
The Transaction object is the handle for a transaction. Methods off the transaction handle are used to configure, abort and commit the transaction. Transaction handles are provided to other Berkeley DB methods in order to transactionally protect those operations.
A single Transaction may be used to protect operations for any number of Databases in a given environment. However, a single Transaction may not be used for operations in more than one distinct environment.

Transaction handles are free-threaded; transactions handles may be used concurrently by multiple threads. Once the {@link Transaction#abort Transaction.abort} or {@link Transaction#commit Transaction.commit} methodis called, the handle may not be accessed again, regardless of the success or failure of the method, with one exception: the {@code abort} method maybe called any number of times to simplify error handling.

To obtain a transaction with default attributes:
```
 Transaction txn = myEnvironment.beginTransaction(null, null); 
```
To customize the attributes of a transaction:
```
 TransactionConfig config = new TransactionConfig(); config.setReadUncommitted(true); Transaction txn = myEnvironment.beginTransaction(null, config); 
```


      Cursor cursor = null;
      OperationStatus result = null;
      DatabaseEntry key = new DatabaseEntry();
      DatabaseEntry value = new DatabaseEntry();
      Transaction txn;
      if (resumable) {
        txn = env.beginTransaction(null, null);
      } else {
        txn = null;
      }
      try {
        cursor = urlsDB.openCursor(txn, null);
        result = cursor.getFirst(key, value, null);


        while (matches < max && result == OperationStatus.SUCCESS) {
          if (value.getData().length > 0) {
            WebURL curi = (WebURL) webURLBinding.entryToObject(value);
            results.add(curi);
            matches++;
          }
          result = cursor.getNext(key, value, null);
        }
      } catch (DatabaseException e) {
        if (txn != null) {
          txn.abort();
          txn = null;
        }
        throw e;
      } finally {
        if (cursor != null) {
          cursor.close();
        }
        if (txn != null) {
          txn.commit();
        }
      }
      return results;
    }
  }

View Full Code Here


      Cursor cursor = null;
      OperationStatus result = null;
      DatabaseEntry key = new DatabaseEntry();
      DatabaseEntry value = new DatabaseEntry();
      Transaction txn;
      if (resumable) {
        txn = env.beginTransaction(null, null);
      } else {
        txn = null;
      }
      try {
        cursor = urlsDB.openCursor(txn, null);
        result = cursor.getFirst(key, value, null);


        while (matches < count && result == OperationStatus.SUCCESS) {
          cursor.delete();
          matches++;
          result = cursor.getNext(key, value, null);
        }
      } catch (DatabaseException e) {
        if (txn != null) {
          txn.abort();
          txn = null;
        }
        throw e;
      } finally {
        if (cursor != null) {
          cursor.close();
        }
        if (txn != null) {
          txn.commit();
        }
      }
    }
  }

View Full Code Here


  public void put(WebURL curi) throws DatabaseException {
    byte[] keyData = Util.int2ByteArray(curi.getDocid());
    DatabaseEntry value = new DatabaseEntry();
    webURLBinding.objectToEntry(curi, value);
    Transaction txn;
    if (resumable) {
      txn = env.beginTransaction(null, null);
    } else {
      txn = null;
    }
    urlsDB.put(txn, new DatabaseEntry(keyData), value);
    if (resumable) {
      txn.commit();
    }
  }

View Full Code Here

      try {
        DatabaseEntry key = new DatabaseEntry(Util.int2ByteArray(webUrl.getDocid()));        
        Cursor cursor = null;
        OperationStatus result = null;
        DatabaseEntry value = new DatabaseEntry();
        Transaction txn = env.beginTransaction(null, null);
        try {
          cursor = urlsDB.openCursor(txn, null);
          result = cursor.getSearchKey(key, value, null);
          
          if (result == OperationStatus.SUCCESS) {
            result = cursor.delete();
            if (result == OperationStatus.SUCCESS) {
              return true;
            }
          }
        } catch (DatabaseException e) {
          if (txn != null) {
            txn.abort();
            txn = null;
          }
          throw e;
        } finally {
          if (cursor != null) {
            cursor.close();
          }
          if (txn != null) {
            txn.commit();
          }
        }
      } catch (Exception e) {
        e.printStackTrace();
      }

View Full Code Here

        dbConfig.setAllowCreate(true);
        dbConfig.setTransactional(true);


        env = new Environment(dbHome, envConfig);


        Transaction txn = null;


        try {
            txn = env.beginTransaction(null, null);
            index = env.openDatabase(txn, "__index__", dbConfig);
            blocks = env.openDatabase(txn, "__blocks__", 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;
        }
    }

View Full Code Here

        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 JEDirectory(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 JEDirectory(txn, index, blocks);


            gen = new Random(seed);
            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 JEDirectory(txn, index, blocks);


            gen = new Random(seed);
            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();

View Full Code Here

        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 JEDirectory(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 read, ");
        System.out.print(totalLength / duration);
        System.out.println(" kb/s");


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


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


            for (int i = 0; i < count; i++) {
                if (i % 2 == 0) {
                    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 even files");


        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 JEDirectory(txn, index, blocks);


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


            for (int i = 0; i < count; i++) {
                int length = gen.nextInt() & LENGTH_MASK;


                if (i % 2 != 0) {
                    String name = i + ".dat";
                    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();
                } else {
                    for (int j = 0; j < length; j++) {
                        gen.nextInt();
                    }
                }
            }
        } 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 JEDirectory(txn, index, blocks);


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


            for (int i = 0; i < count; i++) {
                if (i % 2 != 0) {
                    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();

View Full Code Here

        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 JEDirectory(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 JEDirectory(txn, index, blocks);


            gen = new Random(seed);
            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 JEDirectory(txn, index, blocks);


            gen = new Random(seed);
            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();

View Full Code Here


    private static final Logger _logger = Logger.getLogger(UpgradeFrom4To5.class);


    public void performUpgrade(final Environment environment, final UpgradeInteractionHandler handler, String virtualHostName) throws DatabaseException, AMQStoreException
    {
        Transaction transaction = null;
        try
        {
            reportStarting(environment, 4);


            transaction = environment.beginTransaction(null, null);


            // find all queues which are bound to a topic exchange and which have a colon in their name
            final List<AMQShortString> potentialDurableSubs = findPotentialDurableSubscriptions(environment, transaction);


            Set<String> existingQueues = upgradeQueues(environment, handler, potentialDurableSubs, transaction);
            upgradeQueueBindings(environment, handler, potentialDurableSubs, transaction);
            Set<Long> messagesToDiscard = upgradeDelivery(environment, existingQueues, handler, transaction);
            upgradeContent(environment, handler, messagesToDiscard, transaction);
            upgradeMetaData(environment, handler, messagesToDiscard, transaction);
            renameRemainingDatabases(environment, handler, transaction);
            transaction.commit();


            reportFinished(environment, 5);


        }
        catch (Exception e)
        {
            transaction.abort();
            if (e instanceof DatabaseException)
            {
                throw (DatabaseException) e;
            }
            else if (e instanceof AMQStoreException)

View Full Code Here

    }


    private void upgradeConfiguredObjectsAndDependencies(Environment environment, UpgradeInteractionHandler handler, String virtualHostName)
            throws AMQStoreException
    {
        Transaction transaction = null;
        try
        {
            transaction = environment.beginTransaction(null, null);
            upgradeConfiguredObjects(environment, handler, transaction, virtualHostName);
            upgradeQueueEntries(environment, transaction, virtualHostName);
            upgradeXidEntries(environment, transaction, virtualHostName);
            transaction.commit();
        }
        catch (Exception e)
        {
            transaction.abort();
            if (e instanceof DatabaseException)
            {
                throw (DatabaseException) e;
            }
            else if (e instanceof AMQStoreException)

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of com.sleepycat.je.Transaction

co.paralleluniverse.galaxy.berkeleydb.BerkeleyDB

com.barchart.feed.inst.provider.LocalInstDefDB

com.google.nigori.server.JEDatabase

com.google.refine.broker.RefineBrokerImpl

com.sleepycat.bind.serial.StoredClassCatalog

com.sleepycat.collections.CurrentTransaction

com.sleepycat.collections.test.TransactionTest

com.sleepycat.collections.TransactionRunner

com.sleepycat.je.cleaner.CleanerTest

com.sleepycat.je.cleaner.FileSelectionTest

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.