Java Code Examples for org.apache.cassandra.config.DatabaseDescriptor#loadSchemas()

/**
 * @param args a list of sstables whose metadata we are changing
 */
public static void main(String[] args) throws IOException
{
    PrintStream out = System.out;
    if (args.length < 2)
    {
        out.println("This command should be run with Cassandra stopped!");
        out.println("Usage: sstableofflinerelevel [--dry-run] <keyspace> <columnfamily>");
        System.exit(1);
    }
    boolean dryRun = args[0].equals("--dry-run");
    String keyspace = args[args.length - 2];
    String columnfamily = args[args.length - 1];
    DatabaseDescriptor.loadSchemas(false);

    if (Schema.instance.getCFMetaData(keyspace, columnfamily) == null)
        throw new IllegalArgumentException(String.format("Unknown keyspace/columnFamily %s.%s",
                keyspace,
                columnfamily));

    Keyspace ks = Keyspace.openWithoutSSTables(keyspace);
    ColumnFamilyStore cfs = ks.getColumnFamilyStore(columnfamily);
    Directories.SSTableLister lister = cfs.directories.sstableLister().skipTemporary(true);
    Set<SSTableReader> sstables = new HashSet<>();
    for (Map.Entry<Descriptor, Set<Component>> sstable : lister.list().entrySet())
    {
        if (sstable.getKey() != null)
        {
            try
            {
                SSTableReader reader = SSTableReader.open(sstable.getKey());
                sstables.add(reader);
            }
            catch (Throwable t)
            {
                out.println("Couldn't open sstable: "+sstable.getKey().filenameFor(Component.DATA));
                Throwables.propagate(t);
            }
        }
    }
    if (sstables.isEmpty())
    {
        out.println("No sstables to relevel for "+keyspace+"."+columnfamily);
        System.exit(1);
    }
    Relevel rl = new Relevel(sstables);
    rl.relevel(dryRun);
    System.exit(0);

}
 

/**
 * @param args a list of sstables whose metadata we are changing
 */
public static void main(String[] args) throws IOException
{
    PrintStream out = System.out;
    if (args.length == 0)
    {
        out.println("This command should be run with Cassandra stopped!");
        out.println("Usage: sstablelevelreset <keyspace> <columnfamily>");
        System.exit(1);
    }

    if (!args[0].equals("--really-reset") || args.length != 3)
    {
        out.println("This command should be run with Cassandra stopped, otherwise you will get very strange behavior");
        out.println("Verify that Cassandra is not running and then execute the command like this:");
        out.println("Usage: sstablelevelreset --really-reset <keyspace> <columnfamily>");
        System.exit(1);
    }

    // TODO several daemon threads will run from here.
    // So we have to explicitly call System.exit.
    try
    {
        // load keyspace descriptions.
        DatabaseDescriptor.loadSchemas();

        String keyspaceName = args[1];
        String columnfamily = args[2];
        // validate columnfamily
        if (Schema.instance.getCFMetaData(keyspaceName, columnfamily) == null)
        {
            System.err.println("ColumnFamily not found: " + keyspaceName + "/" + columnfamily);
            System.exit(1);
        }

        Keyspace keyspace = Keyspace.openWithoutSSTables(keyspaceName);
        ColumnFamilyStore cfs = keyspace.getColumnFamilyStore(columnfamily);
        boolean foundSSTable = false;
        for (Map.Entry<Descriptor, Set<Component>> sstable : cfs.directories.sstableLister().list().entrySet())
        {
            if (sstable.getValue().contains(Component.STATS))
            {
                foundSSTable = true;
                Descriptor descriptor = sstable.getKey();
                StatsMetadata metadata = (StatsMetadata) descriptor.getMetadataSerializer().deserialize(descriptor, MetadataType.STATS);
                if (metadata.sstableLevel > 0)
                {
                    out.println("Changing level from " + metadata.sstableLevel + " to 0 on " + descriptor.filenameFor(Component.DATA));
                    descriptor.getMetadataSerializer().mutateLevel(descriptor, 0);
                }
                else
                {
                    out.println("Skipped " + descriptor.filenameFor(Component.DATA) + " since it is already on level 0");
                }
            }
        }

        if (!foundSSTable)
        {
            out.println("Found no sstables, did you give the correct keyspace/columnfamily?");
        }
    }
    catch (Throwable t)
    {
        JVMStabilityInspector.inspectThrowable(t);
        t.printStackTrace();
        System.exit(1);
    }
    System.exit(0);
}