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; import static com.mongodb.client.model.Filters.and; import static com.mongodb.client.model.Filters.eq; 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 static com.redhat.thermostat.gateway.common.mongodb.filters.MongoRequestFilters.buildAnd; import static com.redhat.thermostat.gateway.common.mongodb.filters.MongoRequestFilters.buildEq; import java.util.Arrays; import java.util.List; import com.redhat.thermostat.gateway.common.mongodb.filters.MongoQuery; import org.bson.Document; import org.bson.conversions.Bson; import com.mongodb.BasicDBObject; 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.response.MongoResponseBuilder; public class MongoStorageHandler { private static final String SET_FIELD_NAME = "set"; private final MongoResponseBuilder.Builder mongoResponseBuilder = new MongoResponseBuilder.Builder(); public String getMany(MongoCollection<Document> collection, String queries, Integer limit, Integer offset, String sort, String includes, String excludes) { final MongoQuery query = queries == null ? null : new MongoQuery(MongoRequestFilters.buildQueriesFilter(queries)); return getMany(collection, query, limit, offset, sort, includes, excludes); } public String getMany(MongoCollection<Document> collection, Bson query, Integer limit, Integer offset, String sort, String includes, String excludes) { FindIterable<Document> documents = query == null ? collection.find() : collection.find(query); documents = buildProjection(documents, includes, excludes); final Bson sortObject = MongoSortFilters.createSortObject(sort); documents = documents.sort(sortObject).limit(limit).skip(offset).batchSize(limit) .cursorType(CursorType.NonTailable); return mongoResponseBuilder.addQueryDocuments(documents).build(); } private 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; } public void addSystemObjects(MongoCollection<DBObject> collection, String systemId, String body) { if (body.length() > 0) { List<DBObject> inputList = (List<DBObject>) JSON.parse(body); for (DBObject o : inputList) { o.put(ThermostatFields.SYSTEM_ID, systemId); } collection.insertMany(inputList); } } public void addJvmObjects(MongoCollection<DBObject> collection, String systemId, String jvmId, String body) { if (body.length() > 0) { List<DBObject> inputList = (List<DBObject>) JSON.parse(body); for (DBObject o : inputList) { o.put(ThermostatFields.SYSTEM_ID, systemId); o.put(ThermostatFields.JVM_ID, jvmId); } collection.insertMany(inputList); } } public void deleteMany(MongoCollection<Document> collection, Bson query) { collection.deleteMany(query); } public void updateOneSystemObject(MongoCollection<Document> collection, final String systemId, String queries, String body) { Bson sysQuery = buildEq(ThermostatFields.SYSTEM_ID, systemId); Bson query = buildAnd(sysQuery, MongoRequestFilters.buildQueriesFilter(queries)); BasicDBObject inputObject = (BasicDBObject) JSON.parse(body); BasicDBObject setObject = (BasicDBObject) inputObject.get(SET_FIELD_NAME); if (setObject.containsField(ThermostatFields.SYSTEM_ID)) { throw new UnsupportedOperationException( "Updating " + ThermostatFields.SYSTEM_ID + " field is not allowed"); } final Bson fields = new Document("$set", setObject); collection.updateMany(query, fields); } public void updateOneJvmObject(MongoCollection<Document> collection, final String systemId, final String jvmId, String queries, String body) { Bson sysQuery = buildEq(ThermostatFields.SYSTEM_ID, systemId); Bson jvmQuery = buildEq(ThermostatFields.JVM_ID, jvmId); Bson query = buildAnd(buildAnd(sysQuery, jvmQuery), MongoRequestFilters.buildQueriesFilter(queries)); BasicDBObject inputObject = (BasicDBObject) JSON.parse(body); BasicDBObject setObject = (BasicDBObject) inputObject.get(SET_FIELD_NAME); if (setObject.containsField(ThermostatFields.SYSTEM_ID)) { throw new UnsupportedOperationException( "Updating " + ThermostatFields.SYSTEM_ID + " field is not allowed"); } if (setObject.containsField(ThermostatFields.JVM_ID)) { throw new UnsupportedOperationException( "Updating " + ThermostatFields.JVM_ID + " field is not allowed"); } final Bson fields = new Document("$set", setObject); collection.updateMany(query, fields); } }