JMeter example source code file (ScriptWrapperConverter.java)

This example JMeter source code file (ScriptWrapperConverter.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - JMeter tags/keywords

class, conversionexception, conversionexception, marshallingcontext, noclassdeffounderror, non-nls-1, non-nls-1, object, scriptwrapper, scriptwrapper, scriptwrapperconverter, stacktraceelement, string, string

The JMeter ScriptWrapperConverter.java source code

/*
 * 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.save;

import org.apache.jmeter.save.converters.ConversionHelp;
import org.apache.jorphan.collections.HashTree;

import com.thoughtworks.xstream.mapper.Mapper;
import com.thoughtworks.xstream.converters.ConversionException;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;

/**
 * Handles XStream conversion of Test Scripts
 *
 */
public class ScriptWrapperConverter implements Converter {

    private static final String ATT_PROPERTIES = "properties"; // $NON-NLS-1$
    private static final String ATT_VERSION = "version"; // $NON-NLS-1$

    /**
     * Returns the converter version; used to check for possible
     * incompatibilities
     */
    public static String getVersion() {
        return "$Revision: 959055 $"; // $NON-NLS-1$
    }

    private final Mapper classMapper;

    public ScriptWrapperConverter(Mapper classMapper) {
        this.classMapper = classMapper;
    }

    /**
     * {@inheritDoc}
     */
    public boolean canConvert(@SuppressWarnings("rawtypes") Class arg0) { // superclass is not typed
        return arg0.equals(ScriptWrapper.class);
    }

    /**
     * {@inheritDoc}
     */
    public void marshal(Object arg0, HierarchicalStreamWriter writer, MarshallingContext context) {
        ScriptWrapper wrap = (ScriptWrapper) arg0;
        String version = SaveService.getVERSION();
        ConversionHelp.setOutVersion(version);// Ensure output follows version
        writer.addAttribute(ATT_VERSION, version);
        writer.addAttribute(ATT_PROPERTIES, SaveService.getPropertiesVersion());
        writer.startNode(classMapper.serializedClass(wrap.testPlan.getClass()));
        context.convertAnother(wrap.testPlan);
        writer.endNode();
    }

    /**
     * {@inheritDoc}
     */
    public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
        ScriptWrapper wrap = new ScriptWrapper();
        wrap.version = reader.getAttribute(ATT_VERSION);
        ConversionHelp.setInVersion(wrap.version);// Make sure decoding
                                                    // follows input file
        reader.moveDown();
        // Catch errors and rethrow as ConversionException so we get location details
        try {
            wrap.testPlan = (HashTree) context.convertAnother(wrap, getNextType(reader));
        } catch (NoClassDefFoundError e) {
            throw createConversionException(e);
        } catch (Exception e) {
            throw createConversionException(e);
        }
        return wrap;
    }

    private ConversionException createConversionException(Throwable e) {
        final ConversionException conversionException = new ConversionException(e);
        StackTraceElement[] ste = e.getStackTrace();
        if (ste!=null){
            for(int i=0; i<ste.length; i++){
                StackTraceElement top=ste[i];
                String className=top.getClassName();
                if (className.startsWith("org.apache.jmeter.")){
                    conversionException.add("first-jmeter-class", top.toString());
                    break;
                }
            }
        }
        return conversionException;
    }

    protected Class<?> getNextType(HierarchicalStreamReader reader) {
        String classAttribute = reader.getAttribute(ConversionHelp.ATT_CLASS);
        Class<?> type;
        if (classAttribute == null) {
            type = classMapper.realClass(reader.getNodeName());
        } else {
            type = classMapper.realClass(classAttribute);
        }
        return type;
    }
}