Java tutorial
/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat 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 2, or (at your * option) any later version. * * Thermostat 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 Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.gateway.common.mongodb.executor; import static com.mongodb.client.model.Projections.exclude; import static com.mongodb.client.model.Projections.excludeId; import static com.mongodb.client.model.Projections.fields; import static com.mongodb.client.model.Projections.include; import java.io.IOException; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Set; import com.redhat.thermostat.gateway.common.mongodb.MongoStorageHandler; import org.bson.Document; import org.bson.conversions.Bson; import com.mongodb.CursorType; import com.mongodb.DBObject; import com.mongodb.client.FindIterable; import com.mongodb.client.MongoCollection; import com.mongodb.util.JSON; import com.redhat.thermostat.gateway.common.mongodb.filters.MongoRequestFilters; import com.redhat.thermostat.gateway.common.mongodb.filters.MongoSortFilters; import com.redhat.thermostat.gateway.common.mongodb.keycloak.KeycloakFields; public class MongoExecutor { public MongoDataResultContainer execGetRequest(MongoCollection<Document> collection, Integer limit, Integer offset, String sort, String queries, String includes, String excludes, Set<String> realms) throws IOException { return execGetRequest(collection, limit, offset, sort, buildClientQueries(queries), includes, excludes, realms); } public MongoDataResultContainer execGetRequest(MongoCollection<Document> collection, Integer limit, Integer offset, String sort, List<String> queries, String includes, String excludes, Set<String> realms) { FindIterable<Document> documents = collection.find(); MongoDataResultContainer queryDataContainer = new MongoDataResultContainer(); Bson query = MongoRequestFilters.buildQuery(queries, realms); documents = documents.filter(query); long count = collection.count(query); queryDataContainer.setGetReqCount(count); queryDataContainer.setRemainingNumQueryDocuments((int) (count - (limit + offset))); documents = buildProjection(documents, includes, excludes); final Bson sortObject = MongoSortFilters.createSortObject(sort); documents = documents.sort(sortObject).limit(limit).skip(offset).batchSize(limit) .cursorType(CursorType.NonTailable); queryDataContainer.setQueryDataResult(documents); return queryDataContainer; } public MongoDataResultContainer execPutRequest(MongoCollection<Document> collection, String body, String queries, Set<String> realms) throws IOException { return execPutRequest(collection, body, buildClientQueries(queries), realms); } public MongoDataResultContainer execPutRequest(MongoCollection<Document> collection, String body, List<String> queries, Set<String> realms) { Document inputDocument = Document.parse(body); MongoDataResultContainer metaDataContainer = new MongoDataResultContainer(); Document setDocument = inputDocument.get("set", Document.class); setDocument.remove(KeycloakFields.REALMS_KEY); final Bson fields = new Document("$set", setDocument); final Bson bsonQueries = MongoRequestFilters.buildQuery(queries, realms); collection.updateMany(bsonQueries, fields); metaDataContainer.setPutReqMatches(collection.count(bsonQueries)); return metaDataContainer; } public MongoDataResultContainer execDeleteRequest(MongoCollection<Document> collection, String queries, Set<String> realms) throws IOException { return execDeleteRequest(collection, buildClientQueries(queries), realms); } public MongoDataResultContainer execDeleteRequest(MongoCollection<Document> collection, List<String> queries, Set<String> realms) { MongoDataResultContainer metaDataContainer = new MongoDataResultContainer(); if (queries != null && !queries.isEmpty() || realms != null && !realms.isEmpty()) { Bson bsonQueries = MongoRequestFilters.buildQuery(queries, realms); metaDataContainer.setDeleteReqMatches(collection.count(bsonQueries)); collection.deleteMany(bsonQueries); } else { metaDataContainer.setDeleteReqMatches(collection.count()); collection.drop(); } return metaDataContainer; } public MongoDataResultContainer execPostRequest(MongoCollection<DBObject> collection, String body, Set<String> realms) { MongoDataResultContainer metaDataContainer = new MongoDataResultContainer(); if (body.length() > 0) { List<DBObject> inputList = (List<DBObject>) JSON.parse(body); for (DBObject object : inputList) { object.removeField(KeycloakFields.REALMS_KEY); if (realms != null && !realms.isEmpty()) { object.put(KeycloakFields.REALMS_KEY, realms); } } collection.insertMany(inputList); } return metaDataContainer; } private List<String> buildClientQueries(String queries) throws IOException { if (queries != null) { List<String> queriesList = Arrays.asList(queries.split(",")); for (String query : queriesList) { if (query.startsWith(KeycloakFields.REALMS_KEY)) { throw new IOException("Cannot query realms property"); } } return queriesList; } else { return Collections.emptyList(); } } public static FindIterable<Document> buildProjection(FindIterable<Document> documents, String includes, String excludes) { if (excludes != null) { List<String> excludesList = Arrays.asList(excludes.split(",")); documents = documents.projection(fields(exclude(excludesList), excludeId())); } else if (includes != null) { List<String> includesList = Arrays.asList(includes.split(",")); documents = documents.projection(fields(include(includesList), excludeId())); } else { documents = documents.projection(excludeId()); } return documents; } }