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package org.eclipse.jgit.storage.cassandra;
import static me.prettyprint.hector.api.factory.HFactory.createColumnQuery;
import java.util.concurrent.TimeoutException;
import me.prettyprint.cassandra.serializers.BytesArraySerializer;
import me.prettyprint.hector.api.beans.HColumn;
import me.prettyprint.hector.api.exceptions.HectorException;
import org.eclipse.jgit.storage.dht.DhtException;
import org.eclipse.jgit.storage.dht.RepositoryKey;
import org.eclipse.jgit.storage.dht.RepositoryName;
import org.eclipse.jgit.storage.dht.spi.Context;
import org.eclipse.jgit.storage.dht.spi.RepositoryIndexTable;
import org.eclipse.jgit.storage.dht.spi.util.ColumnMatcher;
class CsRepositoryIndexTable implements RepositoryIndexTable {
private static final BytesArraySerializer S = CassandraDatabase.S;
private static final String CF_REPOSITORY_INDEX = "RepositoryIndex";
private static final String CF_REPOSITORY = "Repository";
private static final byte[] TRUE = { '1' };
private final CassandraDatabase db;
private final ColumnMatcher colName;
private final ColumnMatcher colId;
CsRepositoryIndexTable(CassandraDatabase db) {
this.db = db;
this.colName = new ColumnMatcher("name:");
this.colId = new ColumnMatcher("id");
}
public RepositoryKey get(RepositoryName name) throws DhtException,
TimeoutException {
try {
HColumn<byte[], byte[]> r = createColumnQuery(
db.getKeyspace(Context.LOCAL), S, S, S)
.setColumnFamily(CF_REPOSITORY_INDEX) //
.setKey(name.asBytes()) //
.setName(colId.name()) //
.execute().get();
if (r != null)
return RepositoryKey.fromBytes(r.getValue());
r = createColumnQuery(db.getKeyspace(Context.READ_REPAIR), S, S, S)
.setColumnFamily(CF_REPOSITORY_INDEX) //
.setKey(name.asBytes()) //
.setName(colId.name()) //
.execute().get();
if (r != null)
return RepositoryKey.fromBytes(r.getValue());
return null;
} catch (HectorException err) {
throw new DhtException(err);
}
}
public void putUnique(RepositoryName name, RepositoryKey key)
throws DhtException, TimeoutException {
// TODO Add proper row locking using ZooKeeper.
db.put(CF_REPOSITORY_INDEX, name.asBytes(), colId.name(), key.asBytes());
db.put(CF_REPOSITORY, key.asBytes(), colName.append(name.asBytes()), TRUE);
}
}