Package journal.io.api.Journal

Examples of journal.io.api.Journal.WriteBatch

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            }
        }
    }

    private Location enqueueBatch(WriteCommand writeRecord) throws IOException {
        WriteBatch currentBatch = null;
        int spinnings = 0;
        int limit = SPIN_RETRIES;
        while (true) {
            if (shutdown) {
                throw new IOException("Writer Thread Shutdown!");
            }
            if (asyncException.get() != null) {
                throw new IOException(asyncException.get());
            }
            try {
                if (!shutdown && batching.compareAndSet(false, true)) {
                    try {
                        if (nextWriteBatch == null) {
                            DataFile file = journal.getCurrentWriteFile();
                            boolean canBatch = false;
                            currentBatch = new WriteBatch(file, journal.getLastAppendLocation().getPointer() + 1);
                            canBatch = currentBatch.canBatch(writeRecord, journal.getMaxWriteBatchSize(), journal.getMaxFileLength());
                            if (!canBatch) {
                                file = journal.rotateWriteFile();
                                currentBatch = new WriteBatch(file, 0);
                            }
                            WriteCommand controlRecord = currentBatch.prepareBatch();
                            writeRecord.getLocation().setDataFileId(file.getDataFileId());
                            writeRecord.getLocation().setPointer(currentBatch.incrementAndGetPointer());
                            writeRecord.getLocation().setLatch(currentBatch.getLatch());
                            currentBatch.appendBatch(writeRecord);
                            if (!writeRecord.isSync()) {
                                journal.getInflightWrites().put(controlRecord.getLocation(), controlRecord);
                                journal.getInflightWrites().put(writeRecord.getLocation(), writeRecord);
                                nextWriteBatch = currentBatch;
                            } else {
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    /**
     * The async processing loop that does the batch writes.
     */
    private void processBatches() {
        WriteBatch wb = null;
        try {
            while (!shutdown || !batchQueue.isEmpty()) {
                wb = batchQueue.take();

                if (!wb.isEmpty()) {
                    boolean newOrRotated = lastAppendDataFile != wb.getDataFile();
                    if (newOrRotated) {
                        if (lastAppendRaf != null) {
                            lastAppendRaf.close();
                        }
                        lastAppendDataFile = wb.getDataFile();
                        lastAppendRaf = lastAppendDataFile.openRandomAccessFile();
                    }

                    // Perform batch:
                    wb.perform(lastAppendRaf, journal.isChecksum(), journal.isPhysicalSync(), journal.getReplicationTarget());

                    // Adjust journal length:
                    journal.addToTotalLength(wb.getSize());

                    // Now that the data is on disk, notify callbacks and remove the writes from the in-flight cache:
                    for (WriteCommand current : wb.getWrites()) {
                        try {
                            current.getLocation().getWriteCallback().onSync(current.getLocation());
                        } catch (Throwable ex) {
                            warn(ex, ex.getMessage());
                        }
                        journal.getInflightWrites().remove(current.getLocation());
                    }

                    // Finally signal any waiting threads that the write is on disk.
                    wb.getLatch().countDown();
                }
            }
        } catch (Exception ex) {
            // Put back latest batch:
            batchQueue.offer(wb);
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            }
        }
    }

    private Location enqueueBatch(WriteCommand writeRecord) throws IOException {
        WriteBatch currentBatch = null;
        int spinnings = 0;
        int limit = SPIN_RETRIES;
        while (true) {
            if (asyncException.get() != null) {
                throw new IOException(asyncException.get());
            }
            try {
                if (batching.compareAndSet(false, true)) {
                    boolean hasNewBatch = false;
                    try {
                        if (nextWriteBatch == null) {
                            DataFile file = journal.getCurrentWriteFile();
                            boolean canBatch = false;
                            currentBatch = new WriteBatch(file, journal.getLastAppendLocation().getPointer() + 1);
                            canBatch = currentBatch.canBatch(writeRecord, journal.getMaxWriteBatchSize(), journal.getMaxFileLength());
                            if (!canBatch) {
                                file = journal.rotateWriteFile();
                                currentBatch = new WriteBatch(file, 0);
                            }
                            WriteCommand controlRecord = currentBatch.prepareBatch();
                            writeRecord.getLocation().setDataFileId(file.getDataFileId());
                            writeRecord.getLocation().setPointer(currentBatch.incrementAndGetPointer());
                            writeRecord.getLocation().setLatch(currentBatch.getLatch());
                            currentBatch.appendBatch(writeRecord);
                            if (!writeRecord.isSync()) {
                                journal.getInflightWrites().put(controlRecord.getLocation(), controlRecord);
                                journal.getInflightWrites().put(writeRecord.getLocation(), writeRecord);
                                nextWriteBatch = currentBatch;
                            } else {
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                        Thread.sleep(SPIN_BACKOFF);
                    } catch (Exception ex) {
                    }
                }
                // TODO: Improve by employing different spinning strategies?
                WriteBatch wb = batchQueue.poll();
                try {
                    while (wb != null) {
                        if (!wb.isEmpty()) {
                            boolean newOrRotated = lastAppendDataFile != wb.getDataFile();
                            if (newOrRotated) {
                                if (lastAppendRaf != null) {
                                    lastAppendRaf.close();
                                }
                                lastAppendDataFile = wb.getDataFile();
                                lastAppendRaf = lastAppendDataFile.openRandomAccessFile();
                            }

                            // Perform batch:
                            wb.perform(lastAppendRaf, journal.isChecksum(), journal.isPhysicalSync(), journal.getReplicationTarget());

                            // Adjust journal length:
                            journal.addToTotalLength(wb.getSize());

                            // Now that the data is on disk, notify callbacks and remove the writes from the in-flight cache:
                            for (WriteCommand current : wb.getWrites()) {
                                try {
                                    current.getLocation().getWriteCallback().onSync(current.getLocation());
                                } catch (Throwable ex) {
                                    warn(ex, ex.getMessage());
                                }
                                journal.getInflightWrites().remove(current.getLocation());
                            }

                            // Finally signal any waiting threads that the write is on disk.
                            wb.getLatch().countDown();
                        }
                        // Poll next batch:
                        wb = batchQueue.poll();
                    }
                } catch (Exception ex) {
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            }
        }
    }

    private Location enqueueBatch(WriteCommand writeRecord) throws ClosedJournalException, IOException {
        WriteBatch currentBatch = null;
        int spinnings = 0;
        int limit = SPIN_RETRIES;
        while (true) {
            if (asyncException.get() != null) {
                throw new IOException(asyncException.get());
            }
            try {
                if (!opened) {
                    throw new ClosedJournalException("The journal is closed!");
                }
                if (batching.compareAndSet(false, true)) {
                    boolean hasNewBatch = false;
                    try {
                        if (nextWriteBatch == null) {
                            DataFile file = journal.getCurrentWriteDataFile();
                            boolean canBatch = false;
                            currentBatch = new WriteBatch(file, journal.getLastAppendLocation().getPointer() + 1);
                            canBatch = currentBatch.canBatch(writeRecord, journal.getMaxWriteBatchSize(), journal.getMaxFileLength());
                            if (!canBatch) {
                                file = journal.newDataFile();
                                currentBatch = new WriteBatch(file, 0);
                            }
                            WriteCommand controlRecord = currentBatch.prepareBatch();
                            writeRecord.getLocation().setDataFileId(file.getDataFileId());
                            writeRecord.getLocation().setPointer(currentBatch.incrementAndGetPointer());
                            writeRecord.getLocation().setLatch(currentBatch.getLatch());
                            currentBatch.appendBatch(writeRecord);
                            if (!writeRecord.isSync()) {
                                journal.getInflightWrites().put(controlRecord.getLocation(), controlRecord);
                                journal.getInflightWrites().put(writeRecord.getLocation(), writeRecord);
                                nextWriteBatch = currentBatch;
                            } else {
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                        Thread.sleep(SPIN_BACKOFF);
                    } catch (Exception ex) {
                    }
                }
                // TODO: Improve by employing different spinning strategies?
                WriteBatch wb = batchQueue.poll();
                try {
                    while (wb != null) {
                        if (!wb.isEmpty()) {
                            boolean newOrRotated = lastAppendDataFile != wb.getDataFile();
                            if (newOrRotated) {
                                if (lastAppendRaf != null) {
                                    lastAppendRaf.close();
                                }
                                lastAppendDataFile = wb.getDataFile();
                                lastAppendRaf = lastAppendDataFile.openRandomAccessFile();
                            }

                            // Perform batch:
                            Location batchLocation = wb.perform(lastAppendRaf, journal.isChecksum(), journal.isPhysicalSync(), journal.getReplicationTarget());

                            // Add batch location as hint:
                            journal.getHints().put(batchLocation, batchLocation.getThisFilePosition());

                            // Adjust journal length:
                            journal.addToTotalLength(wb.getSize());

                            // Now that the data is on disk, notify callbacks and remove the writes from the in-flight cache:
                            for (WriteCommand current : wb.getWrites()) {
                                try {
                                    current.getLocation().getWriteCallback().onSync(current.getLocation());
                                } catch (Throwable ex) {
                                    warn(ex, ex.getMessage());
                                }
                                journal.getInflightWrites().remove(current.getLocation());
                            }

                            // Finally signal any waiting threads that the write is on disk.
                            wb.getLatch().countDown();
                        }
                        // Poll next batch:
                        wb = batchQueue.poll();
                    }
                } catch (Exception ex) {
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            }
        }
    }

    private Location enqueueBatch(WriteCommand writeRecord) throws IOException {
        WriteBatch currentBatch = null;
        int spinnings = 0;
        int limit = SPIN_RETRIES;
        while (true) {
            if (shutdown) {
                throw new IOException("DataFileAppender Writer Thread Shutdown!");
            }
            if (firstAsyncException.get() != null) {
                throw new IOException(firstAsyncException.get());
            }
            try {
                if (!shutdown && batching.compareAndSet(false, true)) {
                    try {
                        if (nextWriteBatch == null) {
                            DataFile file = journal.getCurrentWriteFile();
                            boolean canBatch = false;
                            currentBatch = new WriteBatch(file, journal.getLastAppendLocation().getPointer() + 1);
                            canBatch = currentBatch.canBatch(writeRecord, journal.getMaxWriteBatchSize(), journal.getMaxFileLength());
                            if (!canBatch) {
                                file = journal.rotateWriteFile();
                                currentBatch = new WriteBatch(file, 0);
                            }
                            WriteCommand controlRecord = currentBatch.prepareBatch();
                            writeRecord.getLocation().setDataFileId(file.getDataFileId());
                            writeRecord.getLocation().setPointer(currentBatch.incrementAndGetPointer());
                            writeRecord.getLocation().setLatch(currentBatch.getLatch());
                            currentBatch.appendBatch(writeRecord);
                            if (!writeRecord.isSync()) {
                                journal.getInflightWrites().put(controlRecord.getLocation(), controlRecord);
                                journal.getInflightWrites().put(writeRecord.getLocation(), writeRecord);
                                nextWriteBatch = currentBatch;
                            } else {
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     * request in a group.
     */
    private void processBatches() {
        try {
            while (!shutdown || !batchQueue.isEmpty()) {
                WriteBatch wb = batchQueue.take();

                if (!wb.isEmpty()) {
                    boolean newOrRotated = lastAppendDataFile != wb.getDataFile();
                    if (newOrRotated) {
                        if (lastAppendRaf != null) {
                            lastAppendRaf.close();
                        }
                        lastAppendDataFile = wb.getDataFile();
                        lastAppendRaf = lastAppendDataFile.openRandomAccessFile();
                    }

                    // perform batch:
                    wb.perform(lastAppendRaf, journal.getListener(), journal.getReplicationTarget(), journal.isChecksum(), journal.isPhysicalSync());

                    // Adjust journal length:
                    journal.addToTotalLength(wb.getSize());

                    // Now that the data is on disk, remove the writes from the in-flight cache.
                    Collection<WriteCommand> commands = wb.getWrites();
                    for (WriteCommand current : commands) {
                        if (!current.isSync()) {
                            journal.getInflightWrites().remove(current.getLocation());
                        }
                    }

                    // Signal any waiting threads that the write is on disk.
                    wb.getLatch().countDown();
                }
            }
        } catch (Exception e) {
            firstAsyncException.compareAndSet(null, e);
        } finally {
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Related Classes of journal.io.api.Journal.WriteBatch

  • journal.io.api.DataFileAppender
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