Java tutorial
/** * Code contributed to the Learning Layers project * http://www.learning-layers.eu * Development is partly funded by the FP7 Programme of the European Commission under * Grant Agreement FP7-ICT-318209. * Copyright (c) 2014, Graz University of Technology - KTI (Knowledge Technologies Institute). * For a list of contributors see the AUTHORS file at the top-level directory of this distribution. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package at.kc.tugraz.ss.serv.job.dataexport.impl; import at.tugraz.sss.serv.SSDateU; import at.tugraz.sss.serv.SSEncodingU; import at.tugraz.sss.serv.SSFileU; import at.tugraz.sss.serv.SSLogU; import at.tugraz.sss.serv.SSStrU; import at.tugraz.sss.serv.SSUri; import at.tugraz.sss.serv.SSServPar; import at.kc.tugraz.ss.serv.job.dataexport.api.SSDataExportClientI; import at.kc.tugraz.ss.serv.job.dataexport.api.SSDataExportServerI; import at.kc.tugraz.ss.serv.job.dataexport.conf.SSDataExportConf; import at.kc.tugraz.ss.serv.job.dataexport.datatypes.par.SSDataExportAddTagsCategoriesTimestampsForUserEntityPar; import at.kc.tugraz.ss.serv.job.dataexport.datatypes.par.SSDataExportUserEntityTagCategoryTimestampPar; import at.kc.tugraz.ss.serv.job.dataexport.datatypes.par.SSDataExportUserRelationsPar; import at.kc.tugraz.ss.serv.job.dataexport.impl.fct.SSDataExportFct; import at.tugraz.sss.serv.SSConfA; import at.tugraz.sss.serv.SSDBNoSQL; import at.tugraz.sss.serv.SSDBNoSQLI; import at.tugraz.sss.serv.SSDBSQL; import at.tugraz.sss.serv.SSDBSQLI; import at.tugraz.sss.serv.SSServReg; import at.tugraz.sss.serv.SSUserRelationGathererI; import at.tugraz.sss.serv.SSUsersResourcesGathererI; import at.tugraz.sss.serv.caller.SSServCaller; import au.com.bytecode.opencsv.CSVWriter; import java.io.FileOutputStream; import java.io.OutputStreamWriter; import java.nio.charset.Charset; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.commons.lang3.StringUtils; import at.tugraz.sss.serv.SSErr; import at.tugraz.sss.serv.SSServContainerI; import at.tugraz.sss.serv.SSServErrReg; import at.tugraz.sss.serv.SSServImplWithDBA; public class SSDataExportImpl extends SSServImplWithDBA implements SSDataExportClientI, SSDataExportServerI { public SSDataExportImpl(final SSConfA conf) throws Exception { super(conf, (SSDBSQLI) SSDBSQL.inst.serv(), (SSDBNoSQLI) SSDBNoSQL.inst.serv()); } @Override public void dataExportUserEntityTagCategoryTimestamps(final SSServPar parA) throws Exception { final SSDataExportUserEntityTagCategoryTimestampPar par = new SSDataExportUserEntityTagCategoryTimestampPar( parA); CSVWriter fileWriter = null; FileOutputStream out = null; OutputStreamWriter writer = null; try { final Map<String, List<SSUri>> usersResources = new HashMap<>(); final Map<String, List<String>> tagsPerEntities = new HashMap<>(); final Map<String, List<String>> categoriesPerEntities = new HashMap<>(); final List<String> lineParts = new ArrayList<>(); final List<String> allUsers; SSUri user; String resourceString; out = SSFileU.openOrCreateFileWithPathForWrite(SSFileU.dirWorkingDataCsv() + par.fileName); writer = new OutputStreamWriter(out, Charset.forName(SSEncodingU.utf8.toString())); fileWriter = new CSVWriter(writer, SSStrU.semiColon.charAt(0)); try { allUsers = SSStrU.toStr(SSServCaller.userAll(false)); } catch (SSErr error) { switch (error.code) { case notServerServiceForOpAvailable: SSLogU.warn(error.getMessage()); return; default: SSServErrReg.regErrThrow(error); return; } } for (SSServContainerI serv : SSServReg.inst.getServsGatheringUsersResources()) { ((SSUsersResourcesGathererI) serv.serv()).getUsersResources(allUsers, usersResources); } for (Map.Entry<String, List<SSUri>> resourcesForUser : usersResources.entrySet()) { user = SSUri.get(resourcesForUser.getKey()); tagsPerEntities.clear(); categoriesPerEntities.clear(); if (par.exportTags) { tagsPerEntities.putAll(SSDataExportFct.getTagsOfUserPerEntities(user, resourcesForUser.getValue(), par.usePrivateTagsToo)); } if (par.exportCategories) { categoriesPerEntities.putAll(SSDataExportFct.getCategoriesPerEntities(tagsPerEntities.size())); } for (SSUri resource : resourcesForUser.getValue()) { resourceString = SSStrU.toStr(resource); lineParts.clear(); lineParts.add(SSStrU.toStr(user)); lineParts.add(SSStrU.toStr(resource)); lineParts.add(SSStrU.toStr(SSDateU.dateAsLong() / 1000)); //TODO: provide tag time stamps for tags if (tagsPerEntities.containsKey(resourceString)) { lineParts.add(StringUtils.join(tagsPerEntities.get(resourceString), SSStrU.comma)); } else { lineParts.add(SSStrU.empty); } if (categoriesPerEntities.containsKey(resourceString)) { lineParts.add(StringUtils.join(categoriesPerEntities.get(resourceString), SSStrU.comma)); } else { lineParts.add(SSStrU.empty); } fileWriter.writeNext((String[]) lineParts.toArray(new String[lineParts.size()])); } } } catch (Exception error) { SSServErrReg.regErrThrow(error); } finally { if (fileWriter != null) { fileWriter.close(); } else { if (writer != null) { writer.close(); } else { if (out != null) { out.close(); } } } } } @Override public void dataExportAddTagsCategoriesTimestampsForUserEntity(final SSServPar parA) throws Exception { final SSDataExportAddTagsCategoriesTimestampsForUserEntityPar par = new SSDataExportAddTagsCategoriesTimestampsForUserEntityPar( parA); CSVWriter fileWriter = null; FileOutputStream out = null; OutputStreamWriter writer = null; try { final List<String> lineParts = new ArrayList<>(); out = SSFileU.openOrCreateFileWithPathForAppend(SSFileU.dirWorkingDataCsv() + par.fileName); writer = new OutputStreamWriter(out, Charset.forName(SSEncodingU.utf8.toString())); fileWriter = new CSVWriter(writer, SSStrU.semiColon.charAt(0)); lineParts.add(SSStrU.toStr(par.forUser)); lineParts.add(SSStrU.toStr(par.entity)); lineParts.add(SSStrU.toStr(SSDateU.dateAsLong() / 1000)); //TODO: provide tag time stamps for tags if (!par.tags.isEmpty()) { lineParts.add(StringUtils.join(par.tags, SSStrU.comma)); } else { lineParts.add(SSStrU.empty); } if (!par.categories.isEmpty()) { lineParts.add(StringUtils.join(par.categories, SSStrU.comma)); } else { lineParts.add(SSStrU.empty); } fileWriter.writeNext((String[]) lineParts.toArray(new String[lineParts.size()])); } catch (Exception error) { SSServErrReg.regErrThrow(error); } finally { if (fileWriter != null) { fileWriter.close(); } else { if (writer != null) { writer.close(); } else { if (out != null) { out.close(); } } } } } @Override public void dataExportUserRelations(final SSServPar parA) throws Exception { CSVWriter fileWriter = null; try { final SSDataExportUserRelationsPar par = new SSDataExportUserRelationsPar(parA); final Map<String, List<SSUri>> userRelations = new HashMap<>(); final List<String> lineParts = new ArrayList<>(); final List<String> allUsers; List<SSUri> users; try { allUsers = SSStrU.toStr(SSServCaller.userAll(false)); } catch (SSErr error) { switch (error.code) { case notServerServiceForOpAvailable: SSLogU.warn(error.getMessage()); return; default: SSServErrReg.regErrThrow(error); return; } } for (SSServContainerI serv : SSServReg.inst.getServsGatheringUserRelations()) { ((SSUserRelationGathererI) serv.serv()).getUserRelations(allUsers, userRelations); } final FileOutputStream out = SSFileU.openOrCreateFileWithPathForWrite( SSFileU.dirWorkingDataCsv() + ((SSDataExportConf) conf).fileNameForUserRelationsExport); final OutputStreamWriter writer = new OutputStreamWriter(out, Charset.forName(SSEncodingU.utf8.toString())); fileWriter = new CSVWriter(writer, SSStrU.semiColon.charAt(0)); for (Map.Entry<String, List<SSUri>> entry : userRelations.entrySet()) { lineParts.clear(); users = new ArrayList<>(entry.getValue()); SSStrU.remove(users, entry.getKey()); lineParts.add(entry.getKey()); lineParts.add(StringUtils.join(users, SSStrU.comma)); fileWriter.writeNext((String[]) lineParts.toArray(new String[lineParts.size()])); } } catch (Exception error) { SSServErrReg.regErrThrow(error); } finally { if (fileWriter != null) { fileWriter.close(); } } } }