Example usage for org.apache.cassandra.io.sstable KeyIterator close

Introduction

In this page you can find the example usage for org.apache.cassandra.io.sstable KeyIterator close.

Prototype

public void close() 

Source Link

Usage

From source file:com.cloudian.support.SSTableKeyWriter.java

License:Apache License

private void iterateKeys(int limit) throws IOException {

    KeyIterator itr = new KeyIterator(this.descriptor);
    int count = 0;
    while (itr.hasNext() && count < limit) {

        DecoratedKey key = itr.next();/*from   w  ww .  java2 s. c o  m*/
        System.out.println(ByteBufferUtil.string(key.key));
        count++;

    }
    itr.close();

}

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From source file:net.imagini.cassandra.DumpSSTables.SSTableExport.java

License:Apache License

/**
 * Enumerate row keys from an SSTableReader and write the result to a
 * PrintStream./*from  ww  w  .  j  a  v a 2 s  . c  om*/
 * 
 * @param desc
 *            the descriptor of the file to export the rows from
 * @param outs
 *            PrintStream to write the output to
 * @throws IOException
 *             on failure to read/write input/output
 */
public static void enumeratekeys(Descriptor desc, PrintStream outs) throws IOException {
    KeyIterator iter = new KeyIterator(desc);
    DecoratedKey lastKey = null;
    while (iter.hasNext()) {
        DecoratedKey key = iter.next();

        // validate order of the keys in the sstable
        if (lastKey != null && lastKey.compareTo(key) > 0)
            throw new IOException("Key out of order! " + lastKey + " > " + key);
        lastKey = key;

        outs.println(ByteBufferUtil.string(key.key));
    }
    iter.close();
    outs.flush();
}

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