org.opennms.netmgt.collectd

Class JMXCollector

java.lang.Object

org.opennms.netmgt.collectd.JMXCollector

All Implemented Interfaces:

ServiceCollector

Direct Known Subclasses:

JBossCollector, JMXSecureCollector, Jsr160Collector, MX4JCollector

public abstract class JMXCollector
extends Object
implements ServiceCollector

This class performs the collection and storage of data. The derived class manages the connection and configuration. The SNMPCollector class was used as the starting point for this class so anyone familiar with it should be able to easily understand it.

The jmx-datacollection-config.xml defines a list of MBeans and attributes that may be monitored. This class retrieves the list of MBeans for the specified service name (currently jboss and jsr160) and queries the remote server for the attributes. The values are then stored in RRD files.

Two types of MBeans may be specified in the jmx-datacollection-config.xml file. Standard MBeans which consist of and ObjectName and their attributes, and WildCard MBeans which performs a query to retrieve MBeans based on a criteria. The current implementation looks like: jboss:a=b,c=d,* Future versions may permit enhanced queries. In either case multiple MBeans may be returned and these MBeans would then be queried to obtain their attributes. There are some important issues then using the wild card approach:

1. Since multiple MBeans will have the same attribute name there needs to be a way to differentiate them. To handle this situation you need to specify which field in the ObjectName should be used. This is defined as the key-field.
2. The version of RRD that is used is limited to 19 characters. If this limit is exceeded then the data will not be saved. The name is defined as: keyField_attributeName.rrd Since the keyfield is defined in the Object Name and may be too long, you may define an alias for it. The key-alias parameter permit you to define a list of names to be substituted. Only exact matches are handled. An example is: key-alias="this-name-is-long|thisIsNot,name-way-2-long,goodName"
3. If there are keyfields that you want to exclude (exact matches) you may use a comma separated list like: exclude="name1,name2,name3"
4. Unlike the Standard MBeans there is no way (currently) to pre-define graphs for them in the snmp-graph.properties file. The only way you can create graphs is to create a custom graph in the Report section. The wild card approach needs to be carefully considered before using it but it can cut down on the amount of work necessary to define what to save.

Author:

Mike Jamison, OpenNMS

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JMXCollector.JMXCollectionResource

Field Summary

Fields inherited from interface org.opennms.netmgt.collection.api.ServiceCollector

COLLECTION_FAILED, COLLECTION_SUCCEEDED, COLLECTION_UNKNOWN, statusType

Constructor Summary

Constructors

Constructor and Description
JMXCollector()

Method Summary

Modifier and Type	Method and Description
protected static Map<String,JMXDataSource>	buildDataSourceList(String collectionName, Map<String,List<Attrib>> attributeMap) This method is responsible for building a list of RRDDataSource objects from the provided list of MBeanObject objects.
CollectionSet	collect(CollectionAgent agent, EventProxy eproxy, Map<String,Object> map) Invokes a collection on the object.
protected abstract String	getConnectionName()
RrdRepository	getRrdRepository(String collectionName) getRrdRepository
void	initialize(CollectionAgent agent, Map<String,Object> parameters) initialize
void	initialize(Map<String,String> parameters) initialize
void	release() Responsible for freeing up any resources held by the collector.
void	release(CollectionAgent agent) release
String	serviceName() Returns the name of the service that the plug-in collects ("JMX").
void	setServiceName(String name) Setter for the field serviceName.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JMXCollector

public JMXCollector()

Method Detail

serviceName

public String serviceName()

Returns the name of the service that the plug-in collects ("JMX").

Returns:

The service that the plug-in collects.

setServiceName

public void setServiceName(String name)

Setter for the field serviceName.

Parameters:

name - a String object.

initialize

public void initialize(Map<String,String> parameters)

initialize

Initialize the service collector.

During initialization the JMX collector: - Initializes various configuration factories. - Verifies access to the database - Verifies access to RRD file repository - Verifies access to JNI RRD shared library - Determines if JMX to be stored for only the node's primary interface or for all interfaces.

Specified by:

initialize in interface ServiceCollector

Parameters:

parameters - a Map object.

Throws:

RuntimeException - Thrown if an unrecoverable error occurs that prevents the plug-in from functioning.

release

public void release()

Responsible for freeing up any resources held by the collector.

Specified by:

release in interface ServiceCollector

initialize

public void initialize(CollectionAgent agent,
                       Map<String,Object> parameters)

initialize

Responsible for performing all necessary initialization for the specified interface in preparation for data collection.

Specified by:

initialize in interface ServiceCollector

Parameters:

agent - a org.opennms.netmgt.collectd.CollectionAgent object.

parameters - a Map object.

release

public void release(CollectionAgent agent)

release

Responsible for releasing any resources associated with the specified interface.

Specified by:

release in interface ServiceCollector

Parameters:

agent - a org.opennms.netmgt.collectd.CollectionAgent object.

getConnectionName

protected abstract String getConnectionName()

collect

public CollectionSet collect(CollectionAgent agent,
                             EventProxy eproxy,
                             Map<String,Object> map)

Invokes a collection on the object.

Perform data collection.

Specified by:

collect in interface ServiceCollector

Parameters:

agent - a org.opennms.netmgt.collectd.CollectionAgent object.

eproxy - a EventProxy object.

map - a Map object.

Returns:

a org.opennms.netmgt.config.collector.CollectionSet object.

buildDataSourceList

protected static Map<String,JMXDataSource> buildDataSourceList(String collectionName,
                                                               Map<String,List<Attrib>> attributeMap)

This method is responsible for building a list of RRDDataSource objects from the provided list of MBeanObject objects.

Parameters:

collectionName - Collection name

attributeMap - List of MBeanObject objects defining the attributes to be collected via JMX.

Returns:

list of RRDDataSource objects

getRrdRepository

public RrdRepository getRrdRepository(String collectionName)

getRrdRepository

Specified by:

getRrdRepository in interface ServiceCollector

Parameters:

collectionName - a String object.

Returns:

a RrdRepository object.