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Diffstat (limited to 'manuals_and_examples/examples/java/Query.java')
| -rw-r--r-- | manuals_and_examples/examples/java/Query.java | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/manuals_and_examples/examples/java/Query.java b/manuals_and_examples/examples/java/Query.java new file mode 100644 index 0000000..9fd3d9c --- /dev/null +++ b/manuals_and_examples/examples/java/Query.java @@ -0,0 +1,225 @@ +/* +* This file is part of rasdaman community. +* +* Rasdaman community is free software: you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation, either version 3 of the License, or +* (at your option) any later version. +* +* Rasdaman community is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>. +* +* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann / +rasdaman GmbH. +* +* For more information please see <http://www.rasdaman.org> +* or contact Peter Baumann via <baumann@rasdaman.com>. +*/ +/************************************************************* + * + * + * PURPOSE: Example Java program for reading a query out of a file + * and send it to the server and write the result into a log file + * + * + ************************************************************/ + +import rasj.*; +import rasj.odmg.*; +import org.odmg.*; +import java.util.*; +import java.io.*; + +/** + * Example Java program for reading a query out of a file + * and send it to the server and write the result into a log file + * + * set the server name with -server, the database name with -database, the collection name with -collection, + * set port number with -port, the user login with -user, the password with -passwd, + * the path to log file with -logfile, path to query file with -queryfile + */ +public class Query +{ + + public static void main( String[] args ) + { + String server = "localhost"; + String port = "7001"; + String base = "RASBASE"; + String coll = "rockies"; + String user = "rasguest"; + String passwd = "rasguest"; + String file = ""; + String query = ""; + String log = ""; + String ret = ""; + + for (int i=args.length-1; i>=0; i--) + { + //System.out.println(args[i]); + if (args[i].equals("-server")) + server = args[i+1]; + if (args[i].equals("-port")) + port = args[i+1]; + if (args[i].equals("-database")) + base = args[i+1]; + if (args[i].equals("-collection")) + coll = args[i+1]; + if (args[i].equals("-logfile")) + log = args[i+1]; + if (args[i].equals("-user")) + user = args[i+1]; + if (args[i].equals("-passwd")) + passwd = args[i+1]; + if (args[i].equals("-queryfile")) + { + try + { + file = args[i+1]; + //System.out.println(file); + FileReader fr = new FileReader(file); + BufferedReader in = new BufferedReader(fr); + String s; + + while((s = in.readLine()) != null) + { + String t = s.trim(); + while(t.regionMatches(0, "--", 0, 2)) + { + s = in.readLine(); + t = s.trim(); + } + query = query +" "+ s; + } + + } + catch(FileNotFoundException e) + { + ret = ret+" Query-file not found!"+e.getMessage(); + System.err.println(ret); + } + catch(IOException e) + { + ret = ret+" Could not read Query-file!"+e.getMessage(); + System.err.println(ret); + } + + } + + } + + + Transaction myTa = null; + Database myDb = null; + int accessMode = Database.OPEN_READ_ONLY; + + try + { + Implementation myApp = new RasImplementation("http://"+server+":"+port); + ((RasImplementation)myApp).setUserIdentification(user, passwd); + OQLQuery myQu = myApp.newOQLQuery(); + + if(query.equals("")) + query="select avg_cells(a) from "+ coll+" as a"; + //query="create collection UpdateULong1 ULongSet"; + //query="insert into UpdateULong1 values $1"; + + myQu.create(query); + + StringTokenizer strTok = new StringTokenizer(query, "$"); + RasMInterval domain; + RasGMArray mddConst; + if(strTok.hasMoreTokens()) + strTok.nextToken(); + + while(strTok.hasMoreTokens()) + { + strTok.nextToken(); + domain = new RasMInterval("[0:10,0:10]"); + RasStorageLayout stl = new RasStorageLayout(); + stl.setTileSize(100); + mddConst = new RasGMArray(domain, 4, stl); + mddConst.setObjectTypeName("ULongImage"); + //System.out.println(mddConst); + myQu.bind(mddConst); + } + + //check if is an update Query + if((query.indexOf("select") == -1) && + (query.indexOf("SELECT") == -1)) + accessMode = Database.OPEN_READ_WRITE; + + myDb = myApp.newDatabase(); + //System.out.println( "Opening database ..." ); + myDb.open( base, accessMode ); + + //System.out.println( "Starting transaction ..." ); + myTa = myApp.newTransaction(); + myTa.begin(); + + //System.out.println( "Executing query..." ); + DBag result = (DBag) myQu.execute(); + + //System.out.println( "Committing transaction ..." ); + myTa.commit(); + + //System.out.println( "Closing database ..." ); + myDb.close(); + + //System.out.println( " Done." ); + } + catch(RasException e) + { + ret = ret+"RasException: "+e.getMessage(); + System.err.println(ret); + } + catch (org.odmg.ODMGException e) + { + ret = ret + query + "\n Failed:\n " + e.getMessage() + "\n"; + System.err.println(ret); + //System.err.println("Try to abort the transaction ..."); + if(myTa != null) myTa.abort(); + + try + { + //System.err.println("Try to close the database ..."); + if(myDb != null) myDb.close(); + } + catch ( org.odmg.ODMGException exp ) + { + ret = ret+" Could not close the database: " + exp.getMessage(); + System.err.println(ret); + } + + } + if(!log.equals("")) + { + try + { + FileOutputStream fos = new FileOutputStream(log, true); + PrintWriter pw = new PrintWriter(fos); + if(ret.equals("")) + ret = "OK."; + pw.write(ret); + pw.close(); + } + catch(FileNotFoundException e) + { + ret = ret+" Log-file not found!"+e.getMessage(); + System.out.println(ret); + } + catch(IOException e) + { + ret = ret+" Could not write Log-file!"+e.getMessage(); + System.out.println(ret); + } + } + + } + +} |