kieker.monitoring.writer.database
Class AsyncDbWriter

java.lang.Object
  kieker.monitoring.writer.AbstractMonitoringWriter
      kieker.monitoring.writer.AbstractAsyncWriter
          kieker.monitoring.writer.database.AsyncDbWriter

All Implemented Interfaces:

IMonitoringRecordReceiver, IMonitoringWriter

public final class AsyncDbWriter
extends AbstractAsyncWriter

Stores monitoring data into a database. Warning ! This class is an academic prototype and not intended for reliability or availability critical systems. The insertMonitoringData methods are thread-save (also in combination with experimentId changes), so that they may be used by multiple threads at the same time. We have tested this in various applications, in combination with the standard mysql-Jconnector database driver. Our experience shows that it is not a major bottleneck if not too many measurement points are used (e.g., 30/second). However, there are much performance tuning possible in this class. For instance, performance optimization should be possible by using a connection pool instead of a single database connection. The current version uses prepared statements. Alternatively, it could be tuned by collecting multiple database commands before sending it to the database.

Author:

Matthias Rohr, Jan Waller History (Build) (change the String BUILD when this file is changed): 2008/05/29: Changed vmid to vmname (defaults to hostname), which may be changed during runtime 2007/07/30: Initial Prototype

Field Summary

static String	CONFIG_CONNECTIONSTRING
static String	CONFIG_DRIVERCLASSNAME
static String	CONFIG_NRCONN
static String	CONFIG_TABLENAME

Constructor Summary

AsyncDbWriter(Configuration configuration)

Method Summary

void	init() Implementing classes should indicate an initialization error by throwing an Exception.

Methods inherited from class kieker.monitoring.writer.AbstractAsyncWriter

newMonitoringRecord, terminate, toString

Methods inherited from class kieker.monitoring.writer.AbstractMonitoringWriter

getConfiguration, setController

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

CONFIG_DRIVERCLASSNAME

public static final String CONFIG_DRIVERCLASSNAME

CONFIG_CONNECTIONSTRING

public static final String CONFIG_CONNECTIONSTRING

CONFIG_TABLENAME

public static final String CONFIG_TABLENAME

CONFIG_NRCONN

public static final String CONFIG_NRCONN

Constructor Detail

AsyncDbWriter

public AsyncDbWriter(Configuration configuration)
              throws Exception

Throws:

Exception

Method Detail

init

public void init()
          throws Exception

Description copied from class: AbstractMonitoringWriter

Implementing classes should indicate an initialization error by throwing an Exception.

Throws:

Exception