Example usage for org.apache.commons.collections BufferOverflowException BufferOverflowException

Introduction

In this page you can find the example usage for org.apache.commons.collections BufferOverflowException BufferOverflowException.

Prototype

public BufferOverflowException(String message) 

Source Link

Document

Construct a new BufferOverflowException.

Usage

From source file:org.apache.accumulo.core.iterators.user.RowEncodingIterator.java

private void prepKeys() throws IOException {
    long kvBufSize = 0;
    if (topKey != null)
        return;/*from   w  w w . jav a  2  s.  c o  m*/
    Text currentRow;
    do {
        if (sourceIter.hasTop() == false)
            return;
        currentRow = new Text(sourceIter.getTopKey().getRow());
        keys.clear();
        values.clear();
        while (sourceIter.hasTop() && sourceIter.getTopKey().getRow().equals(currentRow)) {
            Key sourceTopKey = sourceIter.getTopKey();
            Value sourceTopValue = sourceIter.getTopValue();
            keys.add(new Key(sourceTopKey));
            values.add(new Value(sourceTopValue));
            kvBufSize += sourceTopKey.getSize() + sourceTopValue.getSize() + 128;
            if (kvBufSize > maxBufferSize) {
                throw new BufferOverflowException("Exceeded buffer size of " + maxBufferSize + " for row: "
                        + sourceTopKey.getRow().toString());
            }
            sourceIter.next();
        }
    } while (!filter(currentRow, keys, values));

    topKey = new Key(currentRow);
    topValue = rowEncoder(keys, values);
}

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From source file:org.apache.accumulo.core.iterators.user.TransformingIterator.java

/**
 * Reads all keys matching the first key's prefix from the source iterator, transforms them, and sorts the resulting keys. Transformed keys that fall outside
 * of our seek range or can't be seen by the user are excluded.
 *//*  ww  w  .  j  av a  2s.c o  m*/
protected void transformKeys() throws IOException {
    keyPos = -1;
    keys.clear();
    final Key prefixKey = super.hasTop() ? new Key(super.getTopKey()) : null;

    transformRange(new RangeIterator(getSource(), prefixKey, getKeyPrefix()), new KVBuffer() {

        long appened = 0;

        @Override
        public void append(Key key, Value val) {
            // ensure the key provided by the user has the correct prefix
            if (!key.equals(prefixKey, getKeyPrefix()))
                throw new IllegalArgumentException("Key prefixes are not equal " + key + " " + prefixKey);

            // Transformation could have produced a key that falls outside
            // of the seek range, or one that the user cannot see. Check
            // these before adding it to the output list.
            if (includeTransformedKey(key)) {

                // try to defend against a scan or compaction using all memory in a tablet server
                if (appened > maxBufferSize)
                    throw new BufferOverflowException(
                            "Exceeded buffer size of " + maxBufferSize + ", prefixKey: " + prefixKey);

                if (getSource().hasTop() && key == getSource().getTopKey())
                    key = new Key(key);
                keys.add(new Pair<Key, Value>(key, new Value(val)));
                appened += (key.getSize() + val.getSize() + 128);
            }
        }
    });

    // consume any key in range that user did not consume
    while (super.hasTop() && super.getTopKey().equals(prefixKey, getKeyPrefix())) {
        super.next();
    }

    if (!keys.isEmpty()) {
        Collections.sort(keys, keyComparator);
        keyPos = 0;
    }
}

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From source file:oz.hadoop.yarn.api.utils.ByteBufferUtils.java

/**
 * /*ww  w.  j  av a 2  s . c  om*/
 * @param source
 * @param target
 * @return
 */
public static ByteBuffer merge(ByteBuffer source, ByteBuffer target) {
    if (target.position() != 0) {
        target.flip();
    }
    int rPos = source.position() + target.limit();
    if (rPos <= source.capacity()) {
        source.put(target);
        return source;
    } else {
        int newLength = calculateNewLength(source, target);
        if (newLength > 0) {
            ByteBuffer b = ByteBuffer.allocate(newLength);
            source.flip();
            b.put(source);
            b.put(target);
            return b;
        } else {
            throw new BufferOverflowException(
                    "Buffer can no longer be expended. Maximum allowed size is " + threshold + " bytes.");
        }
    }
}

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From source file:securitymon.collections.BoundedFifoBuffer.java

/**
 * Adds the given element to this buffer.
 *
 * @param element  the element to add//from www  .j  a va 2 s  .  c om
 * @return true, always
 * @throws NullPointerException  if the given element is null
 * @throws BufferOverflowException  if this buffer is full
 */
public boolean add(byte element) {
    if (full) {
        throw new BufferOverflowException("The buffer cannot hold more than " + maxElements + " objects.");
    }

    elements[end++] = element;

    if (end >= maxElements) {
        end = 0;
    }

    if (end == start) {
        full = true;
    }

    return true;
}

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