This commit is contained in:
Wolfgang Hottgenroth
2017-11-22 17:32:04 +01:00
commit 3bc7fe2531
13 changed files with 420 additions and 0 deletions

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.classpath Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" output="target/classes" path="src/main/java">
<attributes>
<attribute name="optional" value="true"/>
<attribute name="maven.pomderived" value="true"/>
</attributes>
</classpathentry>
<classpathentry kind="src" output="target/test-classes" path="src/test/java">
<attributes>
<attribute name="optional" value="true"/>
<attribute name="maven.pomderived" value="true"/>
</attributes>
</classpathentry>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
<attributes>
<attribute name="maven.pomderived" value="true"/>
</attributes>
</classpathentry>
<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
<attributes>
<attribute name="maven.pomderived" value="true"/>
</attributes>
</classpathentry>
<classpathentry kind="output" path="target/classes"/>
</classpath>

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.gitignore vendored Normal file
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target

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.project Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>MeasurementDatabaseEngine</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.m2e.core.maven2Builder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
<nature>org.eclipse.m2e.core.maven2Nature</nature>
</natures>
</projectDescription>

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eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
org.eclipse.jdt.core.compiler.compliance=1.8
org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
org.eclipse.jdt.core.compiler.source=1.8

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activeProfiles=
eclipse.preferences.version=1
resolveWorkspaceProjects=true
version=1

3
.vscode/settings.json vendored Normal file
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{
"java.configuration.updateBuildConfiguration": "automatic"
}

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db.period = 3600
db.url = jdbc:mysql://localhost/smarthome
db.driver = com.mysql.jdbc.Driver
db.user = smarthome
db.password = smarthome123
jms.broker = tcp://localhost:61616
jms.clientid = mdb
jms.parseddata.topic = IoT/Measurement

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pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>de.hottis.measurementDatabaseEngine</groupId>
<artifactId>MeasurementDatabaseEngine</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>MeasurementDatabaseEngine</name>
<url>http://maven.apache.org</url>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>de.hottis.common</groupId>
<artifactId>HottisLibJava</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>de.hottis.smarthomelib</groupId>
<artifactId>SmarthomeLib</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.44</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>de.hottis.measurementDatabaseEngine.MeasurementDatabaseEngine</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
</build>
</project>

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package de.hottis.measurementDatabaseEngine;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Properties;
import java.util.Timer;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import de.hottis.common.ITriggerable;
import de.hottis.common.MyQueue;
import de.hottis.common.TriggerTimer;
import de.hottis.smarthomelib.ADataObject;
public class DatabaseEngine extends Thread implements ITriggerable {
static final String DATABASE_ENGINE_PERIOD_PROP = "db.period";
static final String DATABASE_URL_PROP = "db.url";
static final String DATABASE_USER_PROP = "db.user";
static final String DATABASE_PASSWORD_PROP = "db.password";
static final String DATABASE_DRIVER_PROP = "db.driver";
final protected Logger logger = LogManager.getRootLogger();
private Properties config;
private MyQueue<ADataObject> queue;
private boolean stop;
private boolean triggerFlag;
private Timer timer;
private int period;
private String dbUrl;
private String dbUsername;
private String dbPassword;
public DatabaseEngine(Properties config, MyQueue<ADataObject> queue) {
super("MeasurementDatabaseEngine.DatabaseEngine");
this.config = config;
this.queue = queue;
this.stop = false;
this.triggerFlag = false;
this.period = Integer.parseInt(this.config.getProperty(DATABASE_ENGINE_PERIOD_PROP));
this.dbUrl = this.config.getProperty(DATABASE_URL_PROP);
this.dbUsername = this.config.getProperty(DATABASE_USER_PROP);
this.dbPassword = this.config.getProperty(DATABASE_PASSWORD_PROP);
}
public void requestShutdown() {
logger.info("Shutdown of database engine requested");
this.stop = true;
try {
this.join();
logger.info("Database engine is down");
} catch (InterruptedException e) {
logger.error("Waiting for shutdown of database engine interrupted");
}
}
public synchronized void trigger() {
logger.debug("DatabaseEngine triggered");
triggerFlag = true;
notify();
}
public void init() throws MeasurementDatabaseEngineException {
timer = new Timer("DatabaseEngineTrigger");
timer.schedule(new TriggerTimer(this), 0, period * 1000);
try {
Class.forName(config.getProperty(DATABASE_DRIVER_PROP));
} catch (ClassNotFoundException e) {
logger.error("Database driver class not found", e);
throw new MeasurementDatabaseEngineException("Database driver class not found", e);
}
}
private String createStatementFromDataObject(ADataObject ado) {
StringBuffer sb = new StringBuffer();
sb.append("INSERT INTO " + ado.getTableName());
sb.append("(name,ts,");
sb.append(String.join(",", ado.getValues().keySet()));
sb.append(") ");
sb.append("VALUES(?,?,");
String[] marks = (String[]) ado.getValues().values().stream()
.map(c -> "?")
.toArray(String[]::new);
sb.append(String.join(",", marks));
sb.append(")");
return sb.toString();
}
private void bindValue(PreparedStatement pstmt, int pos, Object o) throws SQLException {
if (o instanceof Integer) {
pstmt.setInt(pos, (Integer)o);
} else if (o instanceof Byte) {
pstmt.setByte(pos, (Byte)o);
} else if (o instanceof Double) {
pstmt.setDouble(pos, (Double)o);
} else if (o instanceof String) {
pstmt.setString(pos, (String)o);
} else if (o instanceof LocalDateTime) {
pstmt.setTimestamp(pos, Timestamp.valueOf(((LocalDateTime)o)));
} else {
throw new SQLException("illegal parameter type: " + o.getClass().getName());
}
}
@Override
public synchronized void run() {
while (! stop) {
logger.debug("DatabaseEngine is about to wait for (regularly) " + period + "s");
while (! triggerFlag) {
try {
wait();
} catch (InterruptedException e) {
}
}
triggerFlag = false;
logger.debug("DatabaseEngine has received trigger");
Connection dbCon = null;
HashMap<String, PreparedStatement> preparedStatements = new HashMap<String, PreparedStatement>();
try {
int itemCnt = 0;
while (true) {
try {
ADataObject ado = queue.dequeue();
if (ado == null) {
logger.warn("DatabaseEngine found no data");
break;
}
dbCon = DriverManager.getConnection(dbUrl, dbUsername, dbPassword);
String key = ado.getClass().getName();
PreparedStatement pstmt;
if (! preparedStatements.containsKey(key)) {
pstmt = dbCon.prepareStatement(createStatementFromDataObject(ado));
preparedStatements.put(key, pstmt);
} else {
pstmt = preparedStatements.get(key);
}
bindValue(pstmt, 1, ado.getName());
bindValue(pstmt, 2, ado.getTimestamp());
int pos = 3;
for (Object o : ado.getValues().values()) {
bindValue(pstmt, pos, o);
pos++;
}
itemCnt++;
logger.info("DatabaseEngine received (" + itemCnt + ") " + ado);
logger.info("Statement is " + pstmt.toString());
pstmt.execute();
logger.info("Database insert executed");
pstmt.clearParameters();
} catch (SQLException e) {
logger.error("SQLException in inner database engine loop", e);
}
}
} catch (Exception e) {
logger.error("Exception in outer database engine loop", e);
} finally {
for (PreparedStatement p : preparedStatements.values()) {
try {
p.close();
} catch (SQLException e) {
logger.warn("SQLException when closing prepared statement, nothing will be done");
}
}
preparedStatements.clear();
if (dbCon != null) {
try {
dbCon.close();
} catch (SQLException e) {
logger.warn("SQLException when closing connection, nothing will be done");
} finally {
dbCon = null;
}
}
}
}
logger.info("Database engine is terminating");
}
}

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package de.hottis.measurementDatabaseEngine;
import java.io.FileInputStream;
import java.util.Properties;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import de.hottis.common.JmsTopic;
import de.hottis.smarthomelib.ADataObject;
public class MeasurementDatabaseEngine {
static final String PROPS_FILENAME = "measurementDataEngine.props";
static final Logger logger = LogManager.getRootLogger();
public static void main(String[] args) throws Exception {
logger.info("MeasurementDatabaseEngine starting");
final Properties config = new Properties();
try (FileInputStream propsFileInputStream = new FileInputStream(PROPS_FILENAME)) {
config.load(propsFileInputStream);
}
logger.debug("Configuration loaded");
JmsTopic<ADataObject> queue = new JmsTopic<ADataObject>(config, JmsTopic.Mode.CONSUMER);
queue.init();
DatabaseEngine databaseEngine = new DatabaseEngine(config, queue);
databaseEngine.init();
databaseEngine.start();
logger.debug("DatabaseEngine started");
}
}

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package de.hottis.measurementDatabaseEngine;
public class MeasurementDatabaseEngineException extends Exception {
private static final long serialVersionUID = 1L;
public MeasurementDatabaseEngineException(String msg, Throwable cause) {
super(msg, cause);
}
public MeasurementDatabaseEngineException(String msg) {
super(msg);
}
}

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<?xml version="1.0" encoding="UTF-8"?>
<Configuration debug="false">
<Appenders>
<Console name="ConsoleAppender" target="SYSTEM_OUT">
<PatternLayout pattern="%d [%t, %F, %L] %-5level - %msg%n%throwable"/>
</Console>
<File name="FileAppender" fileName="/tmp/MeasurementCollector.log">
<PatternLayout pattern="%d [%t, %F, %L] %-5level - %msg%n%throwable"/>
</File>
</Appenders>
<Loggers>
<Root level="debug">
<AppenderRef ref="ConsoleAppender"/>
<AppenderRef ref="FileAppender"/>
</Root>
</Loggers>
</Configuration>

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package de.hottis.measurementDatabaseEngine;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
/**
* Unit test for simple App.
*/
public class AppTest
extends TestCase
{
/**
* Create the test case
*
* @param testName name of the test case
*/
public AppTest( String testName )
{
super( testName );
}
/**
* @return the suite of tests being tested
*/
public static Test suite()
{
return new TestSuite( AppTest.class );
}
/**
* Rigourous Test :-)
*/
public void testApp()
{
assertTrue( true );
}
}