Examples with PersistenceWindow org.neo4j.kernel.impl.nioneo.store.PersistenceWindow used on opensource projects

Example 1 with PersistenceWindow

use of org.neo4j.kernel.impl.nioneo.store.PersistenceWindow in project neo4j-mobile-android by neo4j-contrib.

the class LegacyDynamicStoreReader method getPropertyChain.

public List<LegacyDynamicRecord> getPropertyChain(long startBlockId) {
    List<LegacyDynamicRecord> recordList = new LinkedList<LegacyDynamicRecord>();
    long blockId = startBlockId;
    while (blockId != Record.NO_NEXT_BLOCK.intValue()) {
        PersistenceWindow window = windowPool.acquire(blockId, OperationType.READ);
        try {
            LegacyDynamicRecord record = getRecord(blockId, window);
            recordList.add(record);
            blockId = record.getNextBlock();
        } finally {
            windowPool.release(window);
        }
    }
    return recordList;
}

Example 2 with PersistenceWindow

use of org.neo4j.kernel.impl.nioneo.store.PersistenceWindow in project neo4j-mobile-android by neo4j-contrib.

the class LegacyPropertyStoreReader method readPropertyRecord.

public LegacyPropertyRecord readPropertyRecord(long id) throws IOException {
    PersistenceWindow persistenceWindow = windowPool.acquire(id, OperationType.READ);
    try {
        Buffer buffer = persistenceWindow.getOffsettedBuffer(id);
        // [    ,   x] in use
        // [xxxx,    ] high prev prop bits
        long inUseByte = buffer.get();
        boolean inUse = (inUseByte & 0x1) == Record.IN_USE.intValue();
        if (!inUse) {
            throw new IllegalArgumentException(MessageFormat.format("Record {0} not in use", id));
        }
        LegacyPropertyRecord record = new LegacyPropertyRecord(id);
        // [    ,    ][    ,    ][xxxx,xxxx][xxxx,xxxx] type
        // [    ,    ][    ,xxxx][    ,    ][    ,    ] high next prop bits
        long typeInt = buffer.getInt();
        record.setType(getEnumType((int) typeInt & 0xFFFF));
        record.setInUse(true);
        record.setKeyIndexId(buffer.getInt());
        record.setPropBlock(buffer.getLong());
        long prevProp = buffer.getUnsignedInt();
        long prevModifier = (inUseByte & 0xF0L) << 28;
        long nextProp = buffer.getUnsignedInt();
        long nextModifier = (typeInt & 0xF0000L) << 16;
        record.setPrevProp(LegacyStore.longFromIntAndMod(prevProp, prevModifier));
        record.setNextProp(LegacyStore.longFromIntAndMod(nextProp, nextModifier));
        return record;
    } finally {
        windowPool.release(persistenceWindow);
    }
}