| /* |
| * 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.karaf.decanter.appender.timescaledb; |
| |
| import java.sql.Connection; |
| import java.sql.PreparedStatement; |
| import java.sql.SQLException; |
| import java.sql.Statement; |
| import java.util.Dictionary; |
| import javax.sql.DataSource; |
| import org.apache.karaf.decanter.api.marshaller.Marshaller; |
| import org.apache.karaf.decanter.appender.utils.EventFilter; |
| import org.osgi.service.component.ComponentContext; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.event.Event; |
| import org.osgi.service.event.EventConstants; |
| import org.osgi.service.event.EventHandler; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Component( |
| name = "org.apache.karaf.decanter.appender.timescaledb", |
| immediate = true, |
| property = EventConstants.EVENT_TOPIC + "=decanter/collect/*" |
| ) |
| public class TimescaleDbAppender implements EventHandler { |
| |
| public static final String TABLE_NAME_PROPERTY = "table.name"; |
| |
| public static final String TABLE_NAME_DEFAULT = "decanter"; |
| |
| @Reference |
| public Marshaller marshaller; |
| |
| @Reference |
| public DataSource dataSource; |
| |
| private final static Logger LOGGER = LoggerFactory.getLogger(TimescaleDbAppender.class); |
| |
| private final static String createExtensionTemplate = |
| "CREATE EXTENSION IF NOT EXISTS timescaledb CASCADE"; |
| private final static String createTableQueryTemplate = |
| "CREATE TABLE TABLENAME(timestamp BIGINT, content text)"; |
| private final static String convertHyperTableQueryTemplate = |
| "SELECT * FROM create_hypertable('TABLENAME', 'timestamp', chunk_time_interval=>_timescaledb_internal.interval_to_usec('1 day'), migrate_data => true);"; |
| |
| private final static String insertQueryTemplate = |
| "INSERT INTO TABLENAME(timestamp, content) VALUES(?,?)"; |
| |
| private Dictionary<String, Object> config; |
| |
| @SuppressWarnings("unchecked") |
| @Activate |
| public void activate(ComponentContext context) { |
| open(context.getProperties()); |
| } |
| |
| public void open(Dictionary<String, Object> config) { |
| this.config = config; |
| String tableName = getValue(config, TABLE_NAME_PROPERTY, TABLE_NAME_DEFAULT); |
| try (Connection connection = dataSource.getConnection()) { |
| createStructure(connection); |
| } catch (Exception e) { |
| LOGGER.debug("Error creating table " + tableName, e); |
| } |
| } |
| |
| private String getValue(Dictionary<String, Object> config, String key, String defaultValue) { |
| String value = (String)config.get(key); |
| return (value != null) ? value : defaultValue; |
| } |
| |
| @Override |
| public void handleEvent(Event event) { |
| if (EventFilter.match(event, config)) { |
| try (Connection connection = dataSource.getConnection()) { |
| String tableName = getValue(config, TABLE_NAME_PROPERTY, TABLE_NAME_DEFAULT); |
| String jsonSt = marshaller.marshal(event); |
| String insertQuery = insertQueryTemplate.replaceAll("TABLENAME", tableName); |
| Long timestamp = (Long) event.getProperty(EventConstants.TIMESTAMP); |
| if (timestamp == null) { |
| timestamp = System.currentTimeMillis(); |
| } |
| try (PreparedStatement insertStatement = connection.prepareStatement(insertQuery)) { |
| insertStatement.setLong(1, timestamp); |
| insertStatement.setString(2, jsonSt); |
| insertStatement.executeUpdate(); |
| LOGGER.trace("Data inserted into {} table", tableName); |
| } |
| } catch (Exception e) { |
| LOGGER.error("Can't store in the database", e); |
| } |
| } |
| } |
| |
| private void createStructure(Connection connection) { |
| String tableName = getValue(config, TABLE_NAME_PROPERTY, TABLE_NAME_DEFAULT); |
| String createTemplate = createTableQueryTemplate; |
| String createTableQuery = createTemplate.replaceAll("TABLENAME", tableName); |
| |
| String convertTemplate = convertHyperTableQueryTemplate; |
| String convertTableQuery = convertTemplate.replaceAll("TABLENAME", tableName); |
| |
| try (Statement createStatement = connection.createStatement()) { |
| createStatement.executeUpdate(createExtensionTemplate); |
| LOGGER.debug("Extension has been created", tableName); |
| createStatement.executeUpdate(createTableQuery); |
| LOGGER.debug("Table {} has been created", tableName); |
| createStatement.execute(convertTableQuery); |
| LOGGER.debug("Table {} has been converted to hypertable", tableName); |
| } catch (SQLException e) { |
| LOGGER.error("Can't create table {}", e); |
| } |
| } |
| |
| } |