abstractjavasamplerclient.java

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/*
 * 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.jmeter.protocol.java.sampler;

import org.apache.jmeter.config.Arguments;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

/**
 * An abstract implementation of the JavaSamplerClient 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 JavaSamplerClient implementations.
 * <p>
 * See {@link org.apache.jmeter.protocol.java.test.SleepTest} for an example of
 * how to extend this class.
 * <p>
 * While it may be necessary to make changes to the JavaSamplerClient 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
 * JavaSamplerClient implementation, developers are encouraged to subclass this
 * abstract class rather than implementing the JavaSamplerClient interface
 * directly. Implementing JavaSamplerClient 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).
 * <p>
 * The runTest() method of JavaSamplerClient 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.
 * 
 * @see JavaSamplerClient#runTest(JavaSamplerContext)
 * 
 * @author <a href="mailto:[e-mail]">Jeremy Arnold</a>
 * @version $Revision: 493789 $
 */
public abstract class AbstractJavaSamplerClient implements JavaSamplerClient {
	/**
	 * The Logger to be used by the Java protocol. This can be used by
	 * subclasses through the getLogger() method.
	 * 
	 * @see #getLogger()
	 */
	private static transient Logger log = LoggingManager.getLoggerForClass();

	/* Implements JavaSamplerClient.setupTest(JavaSamplerContext) */
	public void setupTest(JavaSamplerContext context) {
		log.debug(getClass().getName() + ": setupTest");
	}

	/* Implements JavaSamplerClient.teardownTest(JavaSamplerContext) */
	public void teardownTest(JavaSamplerContext context) {
		log.debug(getClass().getName() + ": teardownTest");
	}

	/* Implements JavaSamplerClient.getDefaultParameters() */
	public Arguments getDefaultParameters() {
		return null;
	}

	/**
	 * Get a Logger instance which can be used by subclasses to log information.
	 * This is the same Logger which is used by the base JavaSampler classes
	 * (jmeter.protocol.java).
	 * 
	 * @return a Logger instance which can be used for logging
	 */
	protected Logger getLogger() {
		return log;
	}
}