Package journal.io.api.Journal

Examples of journal.io.api.Journal.WriteCommand

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            }
        }
    }

    Location readLocationDetails(int file, int pointer) throws ClosedJournalException, IOException {
        WriteCommand asyncWrite = journal.getInflightWrites().get(new Location(file, pointer));
        if (asyncWrite != null) {
            Location location = new Location(file, pointer);
            location.setPointer(asyncWrite.getLocation().getPointer());
            location.setSize(asyncWrite.getLocation().getSize());
            location.setType(asyncWrite.getLocation().getType());
            location.setData(asyncWrite.getData());
            return location;
        } else {
            Location location = new Location(file, pointer);
            Lock threadLock = getOrCreateLock(Thread.currentThread(), location.getDataFileId());
            shared.lock();
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    }

    Location readNextLocationDetails(Location start, final int type) throws ClosedJournalException, IOException {
        // Try with the most immediate subsequent location among inflight writes:
        Location asyncLocation = new Location(start.getDataFileId(), start.getPointer() + 1);
        WriteCommand asyncWrite = journal.getInflightWrites().get(asyncLocation);
        if (asyncWrite != null && asyncWrite.getLocation().isBatchControlRecord() && type != Location.BATCH_CONTROL_RECORD_TYPE) {
            asyncLocation = new Location(start.getDataFileId(), start.getPointer() + 2);
            asyncWrite = journal.getInflightWrites().get(asyncLocation);
        }
        if (asyncWrite != null) {
            asyncLocation.setPointer(asyncWrite.getLocation().getPointer());
            asyncLocation.setSize(asyncWrite.getLocation().getSize());
            asyncLocation.setType(asyncWrite.getLocation().getType());
            asyncLocation.setData(asyncWrite.getData());
            return asyncLocation;
        } else if (!journal.getInflightWrites().containsKey(start)) {
            // Else read from file:
            Lock threadLock = getOrCreateLock(Thread.currentThread(), start.getDataFileId());
            shared.lock();
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            }
        }
    }

    Location readLocationDetails(int file, int pointer) throws IOException {
        WriteCommand asyncWrite = journal.getInflightWrites().get(new Location(file, pointer));
        if (asyncWrite != null) {
            Location location = new Location(file, pointer);
            location.setPointer(asyncWrite.getLocation().getPointer());
            location.setSize(asyncWrite.getLocation().getSize());
            location.setType(asyncWrite.getLocation().getType());
            location.setData(asyncWrite.getData());
            return location;
        } else {
            Location location = new Location(file, pointer);
            Lock threadLock = getOrCreateLock(Thread.currentThread(), location.getDataFileId());
            accessorLock.lock();
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    }

    Location readNextLocationDetails(Location start, int type) throws IOException {
        // Try with the most immediate subsequent location among inflight writes:
        Location asyncLocation = new Location(start.getDataFileId(), start.getPointer() + 1);
        WriteCommand asyncWrite = journal.getInflightWrites().get(asyncLocation);
        if (asyncWrite != null && asyncWrite.getLocation().isBatchControlRecord() && type != Location.BATCH_CONTROL_RECORD_TYPE) {
            asyncLocation = new Location(start.getDataFileId(), start.getPointer() + 2);
            asyncWrite = journal.getInflightWrites().get(asyncLocation);
        }
        if (asyncWrite != null) {
            asyncLocation.setPointer(asyncWrite.getLocation().getPointer());
            asyncLocation.setSize(asyncWrite.getLocation().getSize());
            asyncLocation.setType(asyncWrite.getLocation().getType());
            asyncLocation.setData(asyncWrite.getData());
            return asyncLocation;
        } else {
            // Else read from file:
            Lock threadLock = getOrCreateLock(Thread.currentThread(), start.getDataFileId());
            accessorLock.lock();
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        Location location = new Location();
        location.setSize(size);
        location.setType(type);
        location.setWriteCallback(callback);
        WriteCommand write = new WriteCommand(location, data, sync);
        location = enqueueBatch(write);

        if (sync) {
            try {
                location.getLatch().await();
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                            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 {
                                batchQueue.put(currentBatch);
                            }
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            }
        }
    }

    Location readLocationDetails(int file, int pointer) throws IOException {
        WriteCommand asyncWrite = journal.getInflightWrites().get(new Location(file, pointer));
        if (asyncWrite != null) {
            Location location = new Location(file, pointer);
            location.setPointer(asyncWrite.getLocation().getPointer());
            location.setSize(asyncWrite.getLocation().getSize());
            location.setType(asyncWrite.getLocation().getType());
            location.setData(asyncWrite.getData());
            return location;
        } else {
            Location location = new Location(file, pointer);
            Lock threadLock = getOrCreateLock(Thread.currentThread(), location.getDataFileId());
            accessorLock.lock();
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    }

    Location readNextLocationDetails(Location start, int type) throws IOException {
        // Try with the most immediate subsequent location among inflight writes:
        Location asyncLocation = new Location(start.getDataFileId(), start.getPointer() + 1);
        WriteCommand asyncWrite = journal.getInflightWrites().get(asyncLocation);
        if (asyncWrite != null && asyncWrite.getLocation().isBatchControlRecord() && type != Location.BATCH_CONTROL_RECORD_TYPE) {
            asyncLocation = new Location(start.getDataFileId(), start.getPointer() + 2);
            asyncWrite = journal.getInflightWrites().get(asyncLocation);
        }
        if (asyncWrite != null) {
            asyncLocation.setPointer(asyncWrite.getLocation().getPointer());
            asyncLocation.setSize(asyncWrite.getLocation().getSize());
            asyncLocation.setType(asyncWrite.getLocation().getType());
            asyncLocation.setData(asyncWrite.getData());
            return asyncLocation;
        } else {
            // Else read from file:
            Lock threadLock = getOrCreateLock(Thread.currentThread(), start.getDataFileId());
            accessorLock.lock();
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        Location location = new Location();
        location.setSize(size);
        location.setType(type);
        location.setWriteCallback(callback);
        WriteCommand write = new WriteCommand(location, data, sync);
        location = enqueueBatch(write);

        if (sync) {
            try {
                location.getLatch().await();
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                            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 {
                                batchQueue.offer(currentBatch);
                                hasNewBatch = true;
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Related Classes of journal.io.api.Journal.WriteCommand

  • journal.io.api.DataFileAccessor
  • journal.io.api.DataFileAppender
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