| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.iotdb.session.subscription; |
| |
| import org.apache.iotdb.common.rpc.thrift.TEndPoint; |
| import org.apache.iotdb.isession.SessionConfig; |
| import org.apache.iotdb.isession.SessionDataSet; |
| import org.apache.iotdb.rpc.IoTDBConnectionException; |
| import org.apache.iotdb.rpc.StatementExecutionException; |
| import org.apache.iotdb.rpc.subscription.exception.SubscriptionException; |
| import org.apache.iotdb.rpc.subscription.exception.SubscriptionParameterNotValidException; |
| import org.apache.iotdb.session.Session; |
| import org.apache.iotdb.session.SessionConnection; |
| import org.apache.iotdb.session.subscription.model.Subscription; |
| import org.apache.iotdb.session.subscription.model.Topic; |
| |
| import org.apache.tsfile.read.common.Field; |
| import org.apache.tsfile.read.common.RowRecord; |
| |
| import java.time.ZoneId; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.Properties; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| public class SubscriptionSession extends Session { |
| |
| public SubscriptionSession(String host, int port) { |
| this(host, port, SessionConfig.DEFAULT_USER, SessionConfig.DEFAULT_PASSWORD); |
| } |
| |
| public SubscriptionSession(String host, int port, String username, String password) { |
| // TODO: more configs control |
| super( |
| new Session.Builder() |
| .host(host) |
| .port(port) |
| .username(username) |
| .password(password) |
| // disable auto fetch |
| .enableAutoFetch(false) |
| // disable redirection |
| .enableRedirection(false)); |
| } |
| |
| @Override |
| public SessionConnection constructSessionConnection( |
| Session session, TEndPoint endpoint, ZoneId zoneId) throws IoTDBConnectionException { |
| if (Objects.isNull(endpoint)) { |
| throw new SubscriptionParameterNotValidException( |
| "Subscription session must be configured with an endpoint."); |
| } |
| return new SubscriptionSessionConnection( |
| session, endpoint, zoneId, availableNodes, maxRetryCount, retryIntervalInMs); |
| } |
| |
| /////////////////////////////// topic /////////////////////////////// |
| |
| public void createTopic(String topicName) |
| throws IoTDBConnectionException, StatementExecutionException { |
| final String sql = String.format("CREATE TOPIC %s", topicName); |
| executeNonQueryStatement(sql); |
| } |
| |
| public void createTopic(String topicName, Properties properties) |
| throws IoTDBConnectionException, StatementExecutionException { |
| if (properties.isEmpty()) { |
| createTopic(topicName); |
| } |
| final StringBuilder sb = new StringBuilder(); |
| sb.append('('); |
| properties.forEach( |
| (k, v) -> |
| sb.append('\'') |
| .append(k) |
| .append('\'') |
| .append('=') |
| .append('\'') |
| .append(v) |
| .append('\'') |
| .append(',')); |
| sb.deleteCharAt(sb.length() - 1); |
| sb.append(')'); |
| final String sql = String.format("CREATE TOPIC %s WITH %s", topicName, sb); |
| executeNonQueryStatement(sql); |
| } |
| |
| public void dropTopic(String topicName) |
| throws IoTDBConnectionException, StatementExecutionException { |
| final String sql = String.format("DROP TOPIC %s", topicName); |
| executeNonQueryStatement(sql); |
| } |
| |
| public Set<Topic> getTopics() throws IoTDBConnectionException, StatementExecutionException { |
| final String sql = "SHOW TOPICS"; |
| try (SessionDataSet dataSet = executeQueryStatement(sql)) { |
| return convertDataSetToTopics(dataSet); |
| } |
| } |
| |
| public Optional<Topic> getTopic(String topicName) |
| throws IoTDBConnectionException, StatementExecutionException { |
| final String sql = String.format("SHOW TOPIC %s", topicName); |
| try (SessionDataSet dataSet = executeQueryStatement(sql)) { |
| Set<Topic> topics = convertDataSetToTopics(dataSet); |
| if (topics.isEmpty()) { |
| return Optional.empty(); |
| } |
| return Optional.of(topics.iterator().next()); |
| } |
| } |
| |
| /////////////////////////////// subscription /////////////////////////////// |
| |
| public Set<Subscription> getSubscriptions() |
| throws IoTDBConnectionException, StatementExecutionException { |
| final String sql = "SHOW SUBSCRIPTIONS"; |
| try (SessionDataSet dataSet = executeQueryStatement(sql)) { |
| return convertDataSetToSubscriptions(dataSet); |
| } |
| } |
| |
| public Set<Subscription> getSubscriptions(String topicName) |
| throws IoTDBConnectionException, StatementExecutionException { |
| final String sql = String.format("SHOW SUBSCRIPTIONS ON %s", topicName); |
| try (SessionDataSet dataSet = executeQueryStatement(sql)) { |
| return convertDataSetToSubscriptions(dataSet); |
| } |
| } |
| |
| /////////////////////////////// utility /////////////////////////////// |
| |
| public Set<Topic> convertDataSetToTopics(SessionDataSet dataSet) |
| throws IoTDBConnectionException, StatementExecutionException { |
| Set<Topic> topics = new HashSet<>(); |
| while (dataSet.hasNext()) { |
| RowRecord record = dataSet.next(); |
| List<Field> fields = record.getFields(); |
| if (fields.size() != 2) { |
| throw new SubscriptionException( |
| String.format( |
| "Unexpected fields %s was obtained during SHOW TOPIC...", |
| fields.stream().map(Object::toString).collect(Collectors.joining(", ")))); |
| } |
| topics.add(new Topic(fields.get(0).getStringValue(), fields.get(1).getStringValue())); |
| } |
| return topics; |
| } |
| |
| public Set<Subscription> convertDataSetToSubscriptions(SessionDataSet dataSet) |
| throws IoTDBConnectionException, StatementExecutionException { |
| Set<Subscription> subscriptions = new HashSet<>(); |
| while (dataSet.hasNext()) { |
| RowRecord record = dataSet.next(); |
| List<Field> fields = record.getFields(); |
| if (fields.size() != 3) { |
| throw new SubscriptionException( |
| String.format( |
| "Unexpected fields %s was obtained during SHOW SUBSCRIPTION...", |
| fields.stream().map(Object::toString).collect(Collectors.joining(", ")))); |
| } |
| subscriptions.add( |
| new Subscription( |
| fields.get(0).getStringValue(), |
| fields.get(1).getStringValue(), |
| fields.get(2).getStringValue())); |
| } |
| return subscriptions; |
| } |
| } |