diff options
Diffstat (limited to 'collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase')
3 files changed, 96 insertions, 54 deletions
diff --git a/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseDatatabase.java b/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseDatatabase.java index 5d49fd76da..962a76eb5d 100644 --- a/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseDatatabase.java +++ b/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseDatatabase.java @@ -29,30 +29,27 @@ import org.apache.tuscany.nosqldatastore.Group; import java.io.IOException; public class HBaseDatatabase implements Database{ - + private HTable table; private HBaseAdmin admin; - HBaseDatatabase(String dbname, HBaseAdmin admin){ + HBaseDatatabase(String dbname, HBaseAdmin admin) throws IOException { Configuration conf = HBaseConfiguration.create(); - try { - try{ - HTableDescriptor descriptor = new HTableDescriptor(dbname); - admin.createTable(descriptor); - } catch (MasterNotRunningException e) { - e.printStackTrace(); - } catch (ZooKeeperConnectionException e) { - e.printStackTrace(); - } catch (TableExistsException e){ - System.out.println("connected to existing database...."); - } finally { - table = new HTable(conf,dbname); - System.out.println(new String(table.getTableName())); - this.admin = admin; - table.flushCommits(); - } - }catch (IOException ex) { - ex.printStackTrace(); + + try{ + HTableDescriptor descriptor = new HTableDescriptor(dbname); + admin.createTable(descriptor); + } catch (MasterNotRunningException e) { + e.printStackTrace(); + } catch (ZooKeeperConnectionException e) { + e.printStackTrace(); + } catch (TableExistsException e){ + System.out.println("connected to existing database...."); + } finally { + table = new HTable(conf,dbname); + System.out.println(new String(table.getTableName())); + this.admin = admin; + table.flushCommits(); } } diff --git a/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseGroup.java b/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseGroup.java index f57b70ee60..24cab2d6de 100644 --- a/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseGroup.java +++ b/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseGroup.java @@ -23,6 +23,8 @@ import org.apache.hadoop.hbase.HColumnDescriptor; import org.apache.hadoop.hbase.HTableDescriptor; import org.apache.hadoop.hbase.client.*; import org.apache.tuscany.nosqldatastore.Group; +import org.apache.tuscany.nosqldatastore.exception.DuplicateEntryException; +import org.apache.tuscany.nosqldatastore.exception.EntryNotFoundException; import java.io.IOException; import java.util.HashMap; @@ -38,44 +40,72 @@ public class HBaseGroup implements Group { this.cf = cf; } - public void addEntry(String key, Object value) { - Put put = new Put(key.getBytes()); - put.add(cf.getBytes(),key.getBytes(),((String)value).getBytes()); - try { - table.put(put); - table.flushCommits(); - } catch (IOException e) { - System.out.println("Error: Adding the entry for the Key "+key); - e.printStackTrace(); + public void addEntry(String key, String value) throws DuplicateEntryException { + if(get(key) == null){ + Put put = new Put(key.getBytes()); + put.add(cf.getBytes(),key.getBytes(),value.getBytes()); + try { + table.put(put); + table.flushCommits(); + } catch (IOException e) { + System.out.println("Error: Adding the entry for the Key "+key); + e.printStackTrace(); + } + } else { + throw new DuplicateEntryException("Duplicate entry for key "+key); } + } + public void updateEntry(String key, String value) throws EntryNotFoundException { + if(get(key) != null){ + Put put = new Put(key.getBytes()); + put.add(cf.getBytes(),key.getBytes(),value.getBytes()); + try { + table.put(put); + table.flushCommits(); + } catch (IOException e) { + System.out.println("Error: Adding the entry for the Key "+key); + e.printStackTrace(); + } + } else { + throw new EntryNotFoundException("Entry does not exist for key "+key); + } } - public void updateEntry(String key, Object value) { - addEntry(key,value); + public void deleteEntry(String key) throws EntryNotFoundException { + if(get(key) != null){ + Delete delete = new Delete(key.getBytes()); + delete.deleteColumn(cf.getBytes(), key.getBytes()); + try { + table.delete(delete); + table.flushCommits(); + } catch (IOException e) { + System.out.println("Error: Deleting the entry for the Key "+key); + e.printStackTrace(); + } + } else { + throw new EntryNotFoundException("Entry does not exist for key "+key); + } } - public void deleteEntry(String key) { - Delete delete = new Delete(key.getBytes()); - delete.deleteColumn(cf.getBytes(), key.getBytes()); - try { - table.delete(delete); - table.flushCommits(); - } catch (IOException e) { - System.out.println("Error: Deleting the entry for the Key "+key); - e.printStackTrace(); + public String getEntry(String key) throws EntryNotFoundException { + byte[] b; + if((b = get(key)) != null){ + return new String(b); + } else { + throw new EntryNotFoundException("Entry does not exist for key "+key); } } - public Object getValue(String key) { + private byte[] get(String key){ Result result = null; Get get = new Get(key.getBytes()); try { result = table.get(get); } catch (IOException e) { - System.out.println("Error: Retrieving the value or the Key "+key); + System.out.println("Error: Getting the entry for the Key "+key); e.printStackTrace(); } - return new String(result.getValue(cf.getBytes(),key.getBytes())); + return result.getValue(cf.getBytes(),key.getBytes()); } } diff --git a/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseSession.java b/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseSession.java index 83648eadc0..6279c75181 100644 --- a/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseSession.java +++ b/collaboration/GSoC-2011-Eranda/hbase/src/main/java/org/apache/tuscany/nosqldatastore/hbase/HBaseSession.java @@ -26,6 +26,8 @@ import org.apache.hadoop.hbase.ZooKeeperConnectionException; import org.apache.hadoop.hbase.client.HBaseAdmin; import org.apache.tuscany.nosqldatastore.Database; import org.apache.tuscany.nosqldatastore.Session; +import org.apache.tuscany.nosqldatastore.exception.DatabaseNotFoundException; +import org.apache.tuscany.nosqldatastore.exception.SessionException; import java.io.IOException; @@ -46,23 +48,36 @@ public class HBaseSession implements Session{ } } - public Database createDatabase(String databaseName) { - Database database = new HBaseDatatabase(databaseName, admin); - return database; + public Database createDatabase(String databaseName) throws SessionException { + Database database = null; + try { + database = new HBaseDatatabase(databaseName, admin); + } catch (IOException e) { + throw new SessionException("Session Error"); + } + return database; } - public Database getDatabase(String databaseName) { - Database database = new HBaseDatatabase(databaseName, admin); - return database; + public Database getDatabase(String databaseName) throws SessionException { + Database database = null; + try { + database = new HBaseDatatabase(databaseName, admin); + } catch (IOException e) { + throw new SessionException("Session Error"); + } + return database; } - public void deleteDatabase(String databaseName) { + public void deleteDatabase(String databaseName) throws DatabaseNotFoundException, SessionException { try { - admin.disableTable(databaseName); - admin.deleteTable(databaseName); + if(admin.tableExists(databaseName)){ + admin.disableTable(databaseName); + admin.deleteTable(databaseName); + } else { + throw new DatabaseNotFoundException("Database "+databaseName+" not found"); + } } catch (IOException e) { - System.out.println("Error: Creating the database "+databaseName); - e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. + throw new SessionException("Session Error"); } } } |