org.apache.jmeter.visualizers.backend

Class AbstractBackendListenerClient

java.lang.Object

org.apache.jmeter.visualizers.backend.AbstractBackendListenerClient

All Implemented Interfaces:

BackendListenerClient

Direct Known Subclasses:

GraphiteBackendListenerClient, InfluxdbBackendListenerClient

public abstract class AbstractBackendListenerClient
extends Object
implements BackendListenerClient

An abstract implementation of the BackendListenerClient interface. This implementation provides default implementations of most of the methods in the interface, as well as some convenience methods, in order to simplify development of BackendListenerClient implementations. While it may be necessary to make changes to the BackendListenerClient interface from time to time (therefore requiring changes to any implementations of this interface), we intend to make this abstract class provide reasonable implementations of any new methods so that subclasses do not necessarily need to be updated for new versions. Therefore, when creating a new BackendListenerClient implementation, developers are encouraged to subclass this abstract class rather than implementing the BackendListenerClient interface directly. Implementing BackendListenerClient directly will continue to be supported for cases where extending this class is not possible (for example, when the client class is already a subclass of some other class).

The BackendListenerClient.handleSampleResults(java.util.List, BackendListenerContext) method of BackendListenerClient does not have a default implementation here, so subclasses must define at least this method. It may be useful to override other methods as well.

Since:

2.13

See Also:

BackendListener.sampleOccurred(org.apache.jmeter.samplers.SampleEvent)

Constructor Summary

Constructors

Constructor and Description
AbstractBackendListenerClient()

Method Summary

Modifier and Type	Method and Description
Arguments	getDefaultParameters() Provide a list of parameters which this test supports.
protected Map<String,SamplerMetric>	getMetricsPerSampler()
protected org.slf4j.Logger	getNewLogger() Get a Logger instance which can be used by subclasses to log information.
protected SamplerMetric	getSamplerMetric(String sampleLabel)
protected UserMetric	getUserMetrics()
void	setupTest(BackendListenerContext context) Do any initialization required by this client.
void	teardownTest(BackendListenerContext context) Do any clean-up required at the end of a test run.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jmeter.visualizers.backend.BackendListenerClient

createSampleResult, handleSampleResults

Constructor Detail

AbstractBackendListenerClient

public AbstractBackendListenerClient()

Method Detail

setupTest

public void setupTest(BackendListenerContext context)
               throws Exception

Description copied from interface: BackendListenerClient

Do any initialization required by this client. It is generally recommended to do any initialization such as getting parameter values here rather than BackendListenerClient.handleSampleResults(List, BackendListenerContext) in order to add as little overhead as possible to the test.

Specified by:

setupTest in interface BackendListenerClient

Parameters:

context - provides access to initialization parameters.

Throws:

Exception - when setup fails

teardownTest

public void teardownTest(BackendListenerContext context)
                  throws Exception

Description copied from interface: BackendListenerClient

Do any clean-up required at the end of a test run.

Specified by:

teardownTest in interface BackendListenerClient

Parameters:

context - provides access to initialization parameters.

Throws:

Exception - when tear down fails

getDefaultParameters

public Arguments getDefaultParameters()

Description copied from interface: BackendListenerClient

Provide a list of parameters which this test supports. Any parameter names and associated values returned by this method will appear in the GUI by default so the user doesn't have to remember the exact names. The user can add other parameters which are not listed here. If this method returns null then no parameters will be listed. If the value for some parameter is null then that parameter will be listed in the GUI with an empty value.

Specified by:

getDefaultParameters in interface BackendListenerClient

Returns:

a specification of the parameters used by this test which should be listed in the GUI, or null if no parameters should be listed.

getNewLogger

protected org.slf4j.Logger getNewLogger()

Get a Logger instance which can be used by subclasses to log information. As this class is designed to be subclassed this is useful.

Returns:

Logger instance which can be used for logging

getSamplerMetric

protected final SamplerMetric getSamplerMetric(String sampleLabel)

Parameters:

sampleLabel - Name of sample used as key

Returns:

SamplerMetric

getMetricsPerSampler

protected Map<String,SamplerMetric> getMetricsPerSampler()

Returns:

Map where key is SampleLabel and SamplerMetric is the metrics of this Sample

getUserMetrics

protected UserMetric getUserMetrics()

Returns:

UserMetric