All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.cloudgraph.hbase.graph.HBaseGraphAssembler Maven / Gradle / Ivy

Go to download

CloudGraph(tm) is a suite of Service Data Object (SDO) 2.1 services designed for relational and big-table style "cloud" databases, such as HBase and others.

There is a newer version: 2.0.4
Show newest version
/**
 *        CloudGraph Community Edition (CE) License
 * 
 * This is a community release of CloudGraph, a dual-license suite of
 * Service Data Object (SDO) 2.1 services designed for relational and 
 * big-table style "cloud" databases, such as HBase and others. 
 * This particular copy of the software is released under the 
 * version 2 of the GNU General Public License. CloudGraph was developed by 
 * TerraMeta Software, Inc.
 * 
 * Copyright (c) 2013, TerraMeta Software, Inc. All rights reserved.
 * 
 * General License information can be found below.
 * 
 * This distribution may include materials developed by third
 * parties. For license and attribution notices for these
 * materials, please refer to the documentation that accompanies
 * this distribution (see the "Licenses for Third-Party Components"
 * appendix) or view the online documentation at 
 * . 
 */
package org.cloudgraph.hbase.graph;

import org.apache.hadoop.hbase.client.Result;
import org.plasma.sdo.access.DataGraphAssembler;

/**
 * Constructs a data graph starting with a given root SDO type based on 
 * a given HBase client result row
 * the entire graph being found in the result row or potentially requiring additional scans depending on the
 * assembler implementation.
 * 

* Since every column key in HBase must be unique, and a data graph * may contain any number of nodes, a column key factory is used both * to persist as well as re-constitute a graph. A minimal amount of * "state" information is therefore stored with each graph which maps * user readable sequence numbers (which are used in column keys) to * UUID values. The nodes of the resulting data graph are re-created with * the original UUID values. *

* @see org.cloudgraph.hbase.key.StatefullColumnKeyFactory * @see org.plasma.sdo.PlasmaDataGraph * @see org.apache.hadoop.hbase.client.Result * @author Scott Cinnamond * @since 0.5.1 */ public interface HBaseGraphAssembler extends DataGraphAssembler{ /** * Re-constitutes a data graph from the given HBase client * result (row). * @param resultRow the HBase client * result (row). */ public void assemble(Result resultRow); }




© 2015 - 2025 Weber Informatics LLC | Privacy Policy