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/*
* SSSync, a Simple and Stupid Synchronizer for data with multi-valued attributes
* Copyright (C) 2014 Ludovic Pouzenc <ludovic@pouzenc.fr>
*
* This file is part of SSSync.
*
* SSSync 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.
*
* SSSync 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 SSSync. If not, see <http://www.gnu.org/licenses/>
*/
package conf;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import sync.BasicSyncTask;
import data.filters.MVDataCombiner;
import data.filters.MVDataCombiner.MVDataCombineMode;
import data.io.ConnectionsHolder;
import data.io.MVDataReader;
import data.io.MVDataWriter;
import data.io.SafeDataReader;
import data.io.csv.CSVDataReader;
import data.io.ldap.LDAPConnectionWrapper;
import data.io.sql.SQLConnectionWrapper;
/**
* TODO javadoc
*
* @author lpouzenc
*/
public class SSSyncTasksFactory {
/**
* Build tasks objects with all needed resources from a config beans tree
* @param conf
* @return
* @throws Exception
*/
public static List<BasicSyncTask> setupTasks(ConnectionsHolder connections, ConfigRootBean confMain) throws Exception {
List<BasicSyncTask> tasks = new ArrayList<BasicSyncTask>();
// For each task...
for ( ConfigTaskBean confTask: confMain.getTasks() ) {
MVDataReader srcReader=null;
// Building all sources
List<ConfigSrcOrDestBean> confSources = confTask.getSources();
// See if we are in multiple source situation (then MVDataCombiner) or not (then simple MVDataReader)
if ( confSources.size() == 0 ) {
throw new Exception("Bad config : task '" + confTask.getName() + "' has no defined sources");
} else if ( confSources.size() == 1 ) {
srcReader = new SafeDataReader(_makeReader(connections, confSources.get(0), confTask.getName()), confTask.isSkipReadErrors());
} else {
List<MVDataReader> readers = new ArrayList<MVDataReader>();
List<MVDataCombineMode> mergeModes = new ArrayList<MVDataCombineMode>();
// For each source of the future MVDataCombiner...
for ( ConfigSrcOrDestBean confSource: confSources ) {
// Create and add the reader and his parameters
readers.add(new SafeDataReader(_makeReader(connections, confSource, confTask.getName()), confTask.isSkipReadErrors()));
mergeModes.add(confSource.getMode());
}
srcReader = new MVDataCombiner("srcCombiner", readers.toArray(new MVDataReader[0]), mergeModes.toArray(new MVDataCombineMode[0]));
}
// Building destination
MVDataReader dstReader=null;
MVDataWriter dstWriter=null;
ConfigSrcOrDestBean confDestination = confTask.getDestination();
switch ( confDestination.getKind() ) {
case ldap:
LDAPConnectionWrapper builder = connections.getLDAPConnectionBuilder(confDestination.getConn());
// TODO : configurable lookAhead
MVDataReader tmpReader = builder.newFlatReader(confDestination.getName()+"_reader", confDestination.getBase(), confDestination.getAttr(), 128);
dstReader = new SafeDataReader(tmpReader, false);
dstWriter = builder.newFlatWriter(confDestination.getBase(), confDestination.getAttr());
break;
default:
throw new Exception("Bad config : task '" + confTask.getName() + "' unsupported destination kind");
}
// Then building the sync task and add it to the task list
int maxInserts = confTask.getOpLimits().getInsert();
int maxUpdates = confTask.getOpLimits().getUpdate();
int maxDeletes = confTask.getOpLimits().getDelete();
BasicSyncTask task = new BasicSyncTask(confTask.getName(), false, srcReader, dstReader, dstWriter);
task.setOperationLimits(maxInserts, maxUpdates, maxDeletes);
task.setSkipEntryDelete(confTask.isSkipEntryDelete());
tasks.add(task);
}
return tasks;
}
/**
* Helper function to make a new reader from an existing connection
* @param confSource
* @param taskName
* @return
* @throws Exception
*/
private static MVDataReader _makeReader(ConnectionsHolder connections, ConfigSrcOrDestBean confSource, String taskName) throws Exception {
MVDataReader reader=null;
switch (confSource.getKind()) {
case csv:
reader = new CSVDataReader(confSource.getName(), new FileReader(confSource.getPath()), false);
break;
case ldap:
LDAPConnectionWrapper ldapConnBuilder = connections.getLDAPConnectionBuilder(confSource.getConn());
//FIXME : if conf error, get...ConnectionBuilder could return null
//TODO : configurable lookAhead
reader = ldapConnBuilder.newFlatReader(confSource.getName(), confSource.getBase(), confSource.getAttr(), 128);
break;
case sorted_csv:
reader = new CSVDataReader(confSource.getName(), new FileReader(confSource.getPath()), true);
break;
case sql:
SQLConnectionWrapper sqlConnBuilder = connections.getSQLConnectionBuilder(confSource.getConn());
//TODO We assume the query config item is a filepath. It isn't checked anywhere.
reader = sqlConnBuilder.newReader(confSource.getName(), new File(confSource.getQuery()));
break;
default:
throw new Exception("Bad config : task '" + taskName + "' unsupported source kind");
}
return reader;
}
}
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