/** {@inheritDoc} */
@Override
public Tuple2<LongWritable, Mutation> map(PED persistentEdgeData) throws Exception {
LongWritable key = new LongWritable(persistentEdgeData.getId());
Put put = new Put(edgeDataHandler.getRowKey(persistentEdgeData.getId()));
put = edgeDataHandler.writeEdgeData(put, persistentEdgeData);
reuseTuple.f0 = key;
reuseTuple.f1 = put;
return reuseTuple;
}
/**
* Creates the tables used by the graph store.
*
* @param config Hadoop configuration
* @param vertexDataHandler vertex storage handler
* @param edgeDataHandler edge storage handler
* @param graphDataHandler graph storage handler
* @param vertexDataTableName vertex data table name
* @param edgeTableName edge data table name
* @param graphDataTableName graph data table name
* @throws IOException
*/
private static void createTablesIfNotExists(
final Configuration config,
final VertexDataHandler vertexDataHandler,
final EdgeDataHandler edgeDataHandler,
final GraphDataHandler graphDataHandler,
final String vertexDataTableName,
final String edgeTableName,
final String graphDataTableName)
throws IOException {
HTableDescriptor vertexDataTableDescriptor =
new HTableDescriptor(TableName.valueOf(vertexDataTableName));
HTableDescriptor edgeDataTableDescriptor =
new HTableDescriptor(TableName.valueOf(edgeTableName));
HTableDescriptor graphDataTableDescriptor =
new HTableDescriptor(TableName.valueOf(graphDataTableName));
HBaseAdmin admin = new HBaseAdmin(config);
if (!admin.tableExists(vertexDataTableDescriptor.getName())) {
vertexDataHandler.createTable(admin, vertexDataTableDescriptor);
}
if (!admin.tableExists(edgeDataTableDescriptor.getName())) {
edgeDataHandler.createTable(admin, edgeDataTableDescriptor);
}
if (!admin.tableExists(graphDataTableDescriptor.getName())) {
graphDataHandler.createTable(admin, graphDataTableDescriptor);
}
admin.close();
}