Examples with StepInterface org.pentaho.di.trans.step.StepInterface used on opensource projects

Example 6 with StepInterface

use of org.pentaho.di.trans.step.StepInterface in project pentaho-kettle by pentaho.

the class Trans method prepareExecution.

/**
 * Prepares the transformation for execution. This includes setting the arguments and parameters as well as preparing
 * and tracking the steps and hops in the transformation.
 *
 * @param arguments
 *          the arguments to use for this transformation
 * @throws KettleException
 *           in case the transformation could not be prepared (initialized)
 */
public void prepareExecution(String[] arguments) throws KettleException {
    setPreparing(true);
    startDate = null;
    setRunning(false);
    log.snap(Metrics.METRIC_TRANSFORMATION_EXECUTION_START);
    log.snap(Metrics.METRIC_TRANSFORMATION_INIT_START);
    ExtensionPointHandler.callExtensionPoint(log, KettleExtensionPoint.TransformationPrepareExecution.id, this);
    transMeta.disposeEmbeddedMetastoreProvider();
    if (transMeta.getMetastoreLocatorOsgi() != null) {
        transMeta.setEmbeddedMetastoreProviderKey(transMeta.getMetastoreLocatorOsgi().setEmbeddedMetastore(transMeta.getEmbeddedMetaStore()));
    }
    checkCompatibility();
    // 
    if (arguments != null) {
        setArguments(arguments);
    }
    activateParameters();
    transMeta.activateParameters();
    if (transMeta.getName() == null) {
        if (transMeta.getFilename() != null) {
            log.logBasic(BaseMessages.getString(PKG, "Trans.Log.DispacthingStartedForFilename", transMeta.getFilename()));
        }
    } else {
        log.logBasic(BaseMessages.getString(PKG, "Trans.Log.DispacthingStartedForTransformation", transMeta.getName()));
    }
    if (getArguments() != null) {
        if (log.isDetailed()) {
            log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.NumberOfArgumentsDetected", String.valueOf(getArguments().length)));
        }
    }
    if (isSafeModeEnabled()) {
        if (log.isDetailed()) {
            log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.SafeModeIsEnabled", transMeta.getName()));
        }
    }
    if (getReplayDate() != null) {
        SimpleDateFormat df = new SimpleDateFormat(REPLAY_DATE_FORMAT);
        log.logBasic(BaseMessages.getString(PKG, "Trans.Log.ThisIsAReplayTransformation") + df.format(getReplayDate()));
    } else {
        if (log.isDetailed()) {
            log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.ThisIsNotAReplayTransformation"));
        }
    }
    // 
    if (servletPrintWriter == null) {
        String encoding = System.getProperty("KETTLE_DEFAULT_SERVLET_ENCODING", null);
        if (encoding == null) {
            servletPrintWriter = new PrintWriter(new OutputStreamWriter(System.out));
        } else {
            try {
                servletPrintWriter = new PrintWriter(new OutputStreamWriter(System.out, encoding));
            } catch (UnsupportedEncodingException ex) {
                servletPrintWriter = new PrintWriter(new OutputStreamWriter(System.out));
            }
        }
    }
    // Keep track of all the row sets and allocated steps
    // 
    steps = new ArrayList<>();
    rowsets = new ArrayList<>();
    List<StepMeta> hopsteps = transMeta.getTransHopSteps(false);
    if (log.isDetailed()) {
        log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.FoundDefferentSteps", String.valueOf(hopsteps.size())));
        log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.AllocatingRowsets"));
    }
    // 
    for (int i = 0; i < hopsteps.size(); i++) {
        StepMeta thisStep = hopsteps.get(i);
        if (thisStep.isMapping()) {
            // handled and allocated by the mapping step itself.
            continue;
        }
        if (log.isDetailed()) {
            log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.AllocateingRowsetsForStep", String.valueOf(i), thisStep.getName()));
        }
        List<StepMeta> nextSteps = transMeta.findNextSteps(thisStep);
        int nrTargets = nextSteps.size();
        for (int n = 0; n < nrTargets; n++) {
            // What's the next step?
            StepMeta nextStep = nextSteps.get(n);
            if (nextStep.isMapping()) {
                // handled and allocated by the mapping step itself.
                continue;
            }
            // How many times do we start the source step?
            int thisCopies = thisStep.getCopies();
            if (thisCopies < 0) {
                // 
                throw new KettleException(BaseMessages.getString(PKG, "Trans.Log.StepCopiesNotCorrectlyDefined", thisStep.getName()));
            }
            // How many times do we start the target step?
            int nextCopies = nextStep.getCopies();
            // Are we re-partitioning?
            boolean repartitioning;
            if (thisStep.isPartitioned()) {
                repartitioning = !thisStep.getStepPartitioningMeta().equals(nextStep.getStepPartitioningMeta());
            } else {
                repartitioning = nextStep.isPartitioned();
            }
            int nrCopies;
            if (log.isDetailed()) {
                log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.copiesInfo", String.valueOf(thisCopies), String.valueOf(nextCopies)));
            }
            int dispatchType;
            if (thisCopies == 1 && nextCopies == 1) {
                dispatchType = TYPE_DISP_1_1;
                nrCopies = 1;
            } else if (thisCopies == 1 && nextCopies > 1) {
                dispatchType = TYPE_DISP_1_N;
                nrCopies = nextCopies;
            } else if (thisCopies > 1 && nextCopies == 1) {
                dispatchType = TYPE_DISP_N_1;
                nrCopies = thisCopies;
            } else if (thisCopies == nextCopies && !repartitioning) {
                dispatchType = TYPE_DISP_N_N;
                nrCopies = nextCopies;
            } else {
                // > 1!
                dispatchType = TYPE_DISP_N_M;
                nrCopies = nextCopies;
            }
            // 
            if (dispatchType != TYPE_DISP_N_M) {
                for (int c = 0; c < nrCopies; c++) {
                    RowSet rowSet;
                    switch(transMeta.getTransformationType()) {
                        case Normal:
                            // This is a temporary patch until the batching rowset has proven
                            // to be working in all situations.
                            // Currently there are stalling problems when dealing with small
                            // amounts of rows.
                            // 
                            Boolean batchingRowSet = ValueMetaString.convertStringToBoolean(System.getProperty(Const.KETTLE_BATCHING_ROWSET));
                            if (batchingRowSet != null && batchingRowSet.booleanValue()) {
                                rowSet = new BlockingBatchingRowSet(transMeta.getSizeRowset());
                            } else {
                                rowSet = new BlockingRowSet(transMeta.getSizeRowset());
                            }
                            break;
                        case SerialSingleThreaded:
                            rowSet = new SingleRowRowSet();
                            break;
                        case SingleThreaded:
                            rowSet = new QueueRowSet();
                            break;
                        default:
                            throw new KettleException("Unhandled transformation type: " + transMeta.getTransformationType());
                    }
                    switch(dispatchType) {
                        case TYPE_DISP_1_1:
                            rowSet.setThreadNameFromToCopy(thisStep.getName(), 0, nextStep.getName(), 0);
                            break;
                        case TYPE_DISP_1_N:
                            rowSet.setThreadNameFromToCopy(thisStep.getName(), 0, nextStep.getName(), c);
                            break;
                        case TYPE_DISP_N_1:
                            rowSet.setThreadNameFromToCopy(thisStep.getName(), c, nextStep.getName(), 0);
                            break;
                        case TYPE_DISP_N_N:
                            rowSet.setThreadNameFromToCopy(thisStep.getName(), c, nextStep.getName(), c);
                            break;
                        default:
                            break;
                    }
                    rowsets.add(rowSet);
                    if (log.isDetailed()) {
                        log.logDetailed(BaseMessages.getString(PKG, "Trans.TransformationAllocatedNewRowset", rowSet.toString()));
                    }
                }
            } else {
                // distribution...
                for (int s = 0; s < thisCopies; s++) {
                    for (int t = 0; t < nextCopies; t++) {
                        BlockingRowSet rowSet = new BlockingRowSet(transMeta.getSizeRowset());
                        rowSet.setThreadNameFromToCopy(thisStep.getName(), s, nextStep.getName(), t);
                        rowsets.add(rowSet);
                        if (log.isDetailed()) {
                            log.logDetailed(BaseMessages.getString(PKG, "Trans.TransformationAllocatedNewRowset", rowSet.toString()));
                        }
                    }
                }
            }
        }
        log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.AllocatedRowsets", String.valueOf(rowsets.size()), String.valueOf(i), thisStep.getName()) + " ");
    }
    if (log.isDetailed()) {
        log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.AllocatingStepsAndStepData"));
    }
    // 
    for (int i = 0; i < hopsteps.size(); i++) {
        StepMeta stepMeta = hopsteps.get(i);
        String stepid = stepMeta.getStepID();
        if (log.isDetailed()) {
            log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.TransformationIsToAllocateStep", stepMeta.getName(), stepid));
        }
        // How many copies are launched of this step?
        int nrCopies = stepMeta.getCopies();
        if (log.isDebug()) {
            log.logDebug(BaseMessages.getString(PKG, "Trans.Log.StepHasNumberRowCopies", String.valueOf(nrCopies)));
        }
        // At least run once...
        for (int c = 0; c < nrCopies; c++) {
            // Make sure we haven't started it yet!
            if (!hasStepStarted(stepMeta.getName(), c)) {
                StepMetaDataCombi combi = new StepMetaDataCombi();
                combi.stepname = stepMeta.getName();
                combi.copy = c;
                // The meta-data
                combi.stepMeta = stepMeta;
                combi.meta = stepMeta.getStepMetaInterface();
                // Allocate the step data
                StepDataInterface data = combi.meta.getStepData();
                combi.data = data;
                // Allocate the step
                StepInterface step = combi.meta.getStep(stepMeta, data, c, transMeta, this);
                // Copy the variables of the transformation to the step...
                // don't share. Each copy of the step has its own variables.
                // 
                step.initializeVariablesFrom(this);
                step.setUsingThreadPriorityManagment(transMeta.isUsingThreadPriorityManagment());
                // Pass the connected repository & metaStore to the steps runtime
                // 
                step.setRepository(repository);
                step.setMetaStore(metaStore);
                // things as well...
                if (stepMeta.isPartitioned()) {
                    List<String> partitionIDs = stepMeta.getStepPartitioningMeta().getPartitionSchema().getPartitionIDs();
                    if (partitionIDs != null && partitionIDs.size() > 0) {
                        // Pass the partition ID
                        step.setPartitionID(partitionIDs.get(c));
                    // to the step
                    }
                }
                // Save the step too
                combi.step = step;
                // /
                if (combi.step instanceof LoggingObjectInterface) {
                    LogChannelInterface logChannel = combi.step.getLogChannel();
                    logChannel.setLogLevel(logLevel);
                    logChannel.setGatheringMetrics(log.isGatheringMetrics());
                }
                // Add to the bunch...
                steps.add(combi);
                if (log.isDetailed()) {
                    log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.TransformationHasAllocatedANewStep", stepMeta.getName(), String.valueOf(c)));
                }
            }
        }
    }
    // 
    for (int s = 0; s < steps.size(); s++) {
        StepMetaDataCombi combi = steps.get(s);
        if (combi.stepMeta.isDoingErrorHandling()) {
            combi.step.identifyErrorOutput();
        }
    }
    // Now (optionally) write start log record!
    // Make sure we synchronize appropriately to avoid duplicate batch IDs.
    // 
    Object syncObject = this;
    if (parentJob != null) {
        // parallel execution in a job
        syncObject = parentJob;
    }
    if (parentTrans != null) {
        // multiple sub-transformations
        syncObject = parentTrans;
    }
    synchronized (syncObject) {
        calculateBatchIdAndDateRange();
        beginProcessing();
    }
    // 
    for (int i = 0; i < steps.size(); i++) {
        StepMetaDataCombi sid = steps.get(i);
        StepMeta stepMeta = sid.stepMeta;
        StepInterface baseStep = sid.step;
        baseStep.setPartitioned(stepMeta.isPartitioned());
        // Now let's take a look at the source and target relation
        // 
        // If this source step is not partitioned, and the target step is: it
        // means we need to re-partition the incoming data.
        // If both steps are partitioned on the same method and schema, we don't
        // need to re-partition
        // If both steps are partitioned on a different method or schema, we need
        // to re-partition as well.
        // If both steps are not partitioned, we don't need to re-partition
        // 
        boolean isThisPartitioned = stepMeta.isPartitioned();
        PartitionSchema thisPartitionSchema = null;
        if (isThisPartitioned) {
            thisPartitionSchema = stepMeta.getStepPartitioningMeta().getPartitionSchema();
        }
        boolean isNextPartitioned = false;
        StepPartitioningMeta nextStepPartitioningMeta = null;
        PartitionSchema nextPartitionSchema = null;
        List<StepMeta> nextSteps = transMeta.findNextSteps(stepMeta);
        int nrNext = nextSteps.size();
        for (int p = 0; p < nrNext; p++) {
            StepMeta nextStep = nextSteps.get(p);
            if (nextStep.isPartitioned()) {
                isNextPartitioned = true;
                nextStepPartitioningMeta = nextStep.getStepPartitioningMeta();
                nextPartitionSchema = nextStepPartitioningMeta.getPartitionSchema();
            }
        }
        baseStep.setRepartitioning(StepPartitioningMeta.PARTITIONING_METHOD_NONE);
        // 
        if ((!isThisPartitioned && isNextPartitioned) || (isThisPartitioned && isNextPartitioned && !thisPartitionSchema.equals(nextPartitionSchema))) {
            baseStep.setRepartitioning(nextStepPartitioningMeta.getMethodType());
        }
        // For partitioning to a set of remove steps (repartitioning from a master
        // to a set or remote output steps)
        // 
        StepPartitioningMeta targetStepPartitioningMeta = baseStep.getStepMeta().getTargetStepPartitioningMeta();
        if (targetStepPartitioningMeta != null) {
            baseStep.setRepartitioning(targetStepPartitioningMeta.getMethodType());
        }
    }
    setPreparing(false);
    setInitializing(true);
    // 
    if (isMonitored() && steps.size() < 150) {
        doTopologySortOfSteps();
    }
    if (log.isDetailed()) {
        log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.InitialisingSteps", String.valueOf(steps.size())));
    }
    StepInitThread[] initThreads = new StepInitThread[steps.size()];
    Thread[] threads = new Thread[steps.size()];
    // 
    for (int i = 0; i < steps.size(); i++) {
        final StepMetaDataCombi sid = steps.get(i);
        // Do the init code in the background!
        // Init all steps at once, but ALL steps need to finish before we can
        // continue properly!
        // 
        initThreads[i] = new StepInitThread(sid, log);
        // Put it in a separate thread!
        // 
        threads[i] = new Thread(initThreads[i]);
        threads[i].setName("init of " + sid.stepname + "." + sid.copy + " (" + threads[i].getName() + ")");
        ExtensionPointHandler.callExtensionPoint(log, KettleExtensionPoint.StepBeforeInitialize.id, initThreads[i]);
        threads[i].start();
    }
    for (int i = 0; i < threads.length; i++) {
        try {
            threads[i].join();
            ExtensionPointHandler.callExtensionPoint(log, KettleExtensionPoint.StepAfterInitialize.id, initThreads[i]);
        } catch (Exception ex) {
            log.logError("Error with init thread: " + ex.getMessage(), ex.getMessage());
            log.logError(Const.getStackTracker(ex));
        }
    }
    setInitializing(false);
    boolean ok = true;
    // 
    for (int i = 0; i < initThreads.length; i++) {
        StepMetaDataCombi combi = initThreads[i].getCombi();
        if (!initThreads[i].isOk()) {
            log.logError(BaseMessages.getString(PKG, "Trans.Log.StepFailedToInit", combi.stepname + "." + combi.copy));
            combi.data.setStatus(StepExecutionStatus.STATUS_STOPPED);
            ok = false;
        } else {
            combi.data.setStatus(StepExecutionStatus.STATUS_IDLE);
            if (log.isDetailed()) {
                log.logDetailed(BaseMessages.getString(PKG, "Trans.Log.StepInitialized", combi.stepname + "." + combi.copy));
            }
        }
    }
    if (!ok) {
        // 
        for (int i = 0; i < initThreads.length; i++) {
            StepMetaDataCombi combi = initThreads[i].getCombi();
            // Dispose will overwrite the status, but we set it back right after
            // this.
            combi.step.dispose(combi.meta, combi.data);
            if (initThreads[i].isOk()) {
                combi.data.setStatus(StepExecutionStatus.STATUS_HALTED);
            } else {
                combi.data.setStatus(StepExecutionStatus.STATUS_STOPPED);
            }
        }
        // Just for safety, fire the trans finished listeners...
        try {
            fireTransFinishedListeners();
        } catch (KettleException e) {
            // listeners produces errors
            log.logError(BaseMessages.getString(PKG, "Trans.FinishListeners.Exception"));
        // we will not pass this exception up to prepareExecuton() entry point.
        } finally {
            // Flag the transformation as finished even if exception was thrown
            setFinished(true);
        }
        // 
        if (preview) {
            String logText = KettleLogStore.getAppender().getBuffer(getLogChannelId(), true).toString();
            throw new KettleException(BaseMessages.getString(PKG, "Trans.Log.FailToInitializeAtLeastOneStep") + Const.CR + logText);
        } else {
            throw new KettleException(BaseMessages.getString(PKG, "Trans.Log.FailToInitializeAtLeastOneStep") + Const.CR);
        }
    }
    log.snap(Metrics.METRIC_TRANSFORMATION_INIT_STOP);
    KettleEnvironment.setExecutionInformation(this, repository);
    setReadyToStart(true);
}

Example 7 with StepInterface

use of org.pentaho.di.trans.step.StepInterface in project pentaho-kettle by pentaho.

the class Trans method addStepPerformanceSnapShot.

/**
 * Adds a step performance snapshot.
 */
protected void addStepPerformanceSnapShot() {
    if (stepPerformanceSnapShots == null) {
        // Race condition somewhere?
        return;
    }
    boolean pausedAndNotEmpty = isPaused() && !stepPerformanceSnapShots.isEmpty();
    boolean stoppedAndNotEmpty = isStopped() && !stepPerformanceSnapShots.isEmpty();
    if (transMeta.isCapturingStepPerformanceSnapShots() && !pausedAndNotEmpty && !stoppedAndNotEmpty) {
        // get the statistics from the steps and keep them...
        // 
        int seqNr = stepPerformanceSnapshotSeqNr.incrementAndGet();
        for (int i = 0; i < steps.size(); i++) {
            StepMeta stepMeta = steps.get(i).stepMeta;
            StepInterface step = steps.get(i).step;
            StepPerformanceSnapShot snapShot = new StepPerformanceSnapShot(seqNr, getBatchId(), new Date(), getName(), stepMeta.getName(), step.getCopy(), step.getLinesRead(), step.getLinesWritten(), step.getLinesInput(), step.getLinesOutput(), step.getLinesUpdated(), step.getLinesRejected(), step.getErrors());
            List<StepPerformanceSnapShot> snapShotList = stepPerformanceSnapShots.get(step.toString());
            StepPerformanceSnapShot previous;
            if (snapShotList == null) {
                snapShotList = new ArrayList<>();
                stepPerformanceSnapShots.put(step.toString(), snapShotList);
                previous = null;
            } else {
                // the last one...
                previous = snapShotList.get(snapShotList.size() - 1);
            }
            // Make the difference...
            // 
            snapShot.diff(previous, step.rowsetInputSize(), step.rowsetOutputSize());
            synchronized (stepPerformanceSnapShots) {
                snapShotList.add(snapShot);
                if (stepPerformanceSnapshotSizeLimit > 0 && snapShotList.size() > stepPerformanceSnapshotSizeLimit) {
                    snapShotList.remove(0);
                }
            }
        }
        lastStepPerformanceSnapshotSeqNrAdded = stepPerformanceSnapshotSeqNr.get();
    }
}

Example 8 with StepInterface

use of org.pentaho.di.trans.step.StepInterface in project pentaho-kettle by pentaho.

the class Trans method addRowProducer.

/**
 * This adds a row producer to the transformation that just got set up. It is preferable to run this BEFORE execute()
 * but after prepareExecution()
 *
 * @param stepname
 *          The step to produce rows for
 * @param copynr
 *          The copynr of the step to produce row for (normally 0 unless you have multiple copies running)
 * @return the row producer
 * @throws KettleException
 *           in case the thread/step to produce rows for could not be found.
 * @see Trans#execute(String[])
 * @see Trans#prepareExecution(String[])
 */
public RowProducer addRowProducer(String stepname, int copynr) throws KettleException {
    StepInterface stepInterface = getStepInterface(stepname, copynr);
    if (stepInterface == null) {
        throw new KettleException("Unable to find thread with name " + stepname + " and copy number " + copynr);
    }
    // We are going to add an extra RowSet to this stepInterface.
    RowSet rowSet;
    switch(transMeta.getTransformationType()) {
        case Normal:
            rowSet = new BlockingRowSet(transMeta.getSizeRowset());
            break;
        case SerialSingleThreaded:
            rowSet = new SingleRowRowSet();
            break;
        case SingleThreaded:
            rowSet = new QueueRowSet();
            break;
        default:
            throw new KettleException("Unhandled transformation type: " + transMeta.getTransformationType());
    }
    // Add this rowset to the list of active rowsets for the selected step
    stepInterface.addRowSetToInputRowSets(rowSet);
    return new RowProducer(stepInterface, rowSet);
}

Example 9 with StepInterface

use of org.pentaho.di.trans.step.StepInterface in project pentaho-kettle by pentaho.

the class Trans method stopStep.

public void stopStep(StepMetaDataCombi combi, boolean safeStop) {
    StepInterface rt = combi.step;
    rt.setStopped(true);
    rt.setSafeStopped(safeStop);
    rt.resumeRunning();
    try {
        rt.stopRunning(combi.meta, combi.data);
    } catch (Exception e) {
        log.logError("Something went wrong while trying to safe stop the transformation: ", e);
    }
    combi.data.setStatus(StepExecutionStatus.STATUS_STOPPED);
    if (safeStop) {
        rt.setOutputDone();
    }
}

Example 10 with StepInterface

use of org.pentaho.di.trans.step.StepInterface in project pentaho-kettle by pentaho.

the class GetXMLDataTest method testInit.

public void testInit() throws Exception {
    KettleEnvironment.init();
    // 
    // Create a new transformation...
    // 
    TransMeta transMeta = new TransMeta();
    transMeta.setName("getxmldata1");
    PluginRegistry registry = PluginRegistry.getInstance();
    // 
    // create an injector step...
    // 
    String injectorStepname = "injector step";
    InjectorMeta im = new InjectorMeta();
    // Set the information of the injector.
    String injectorPid = registry.getPluginId(StepPluginType.class, im);
    StepMeta injectorStep = new StepMeta(injectorPid, injectorStepname, im);
    transMeta.addStep(injectorStep);
    // 
    // Create a Get XML Data step
    // 
    String getXMLDataName = "get xml data step";
    GetXMLDataMeta gxdm = new GetXMLDataMeta();
    String getXMLDataPid = registry.getPluginId(StepPluginType.class, gxdm);
    StepMeta getXMLDataStep = new StepMeta(getXMLDataPid, getXMLDataName, gxdm);
    transMeta.addStep(getXMLDataStep);
    GetXMLDataField[] fields = new GetXMLDataField[5];
    for (int idx = 0; idx < fields.length; idx++) {
        fields[idx] = new GetXMLDataField();
    }
    fields[0].setName("objectid");
    fields[0].setXPath("${xml_path}");
    fields[0].setElementType(GetXMLDataField.ELEMENT_TYPE_NODE);
    fields[0].setType(ValueMetaInterface.TYPE_STRING);
    fields[0].setFormat("");
    fields[0].setLength(-1);
    fields[0].setPrecision(-1);
    fields[0].setCurrencySymbol("");
    fields[0].setDecimalSymbol("");
    fields[0].setGroupSymbol("");
    fields[0].setTrimType(GetXMLDataField.TYPE_TRIM_NONE);
    gxdm.setEncoding("UTF-8");
    gxdm.setIsAFile(false);
    gxdm.setInFields(true);
    gxdm.setLoopXPath("Level1/Level2/Props");
    gxdm.setXMLField("field1");
    gxdm.setInputFields(fields);
    TransHopMeta hi = new TransHopMeta(injectorStep, getXMLDataStep);
    transMeta.addTransHop(hi);
    // 
    // Create a dummy step 1
    // 
    String dummyStepname1 = "dummy step 1";
    DummyTransMeta dm1 = new DummyTransMeta();
    String dummyPid1 = registry.getPluginId(StepPluginType.class, dm1);
    StepMeta dummyStep1 = new StepMeta(dummyPid1, dummyStepname1, dm1);
    transMeta.addStep(dummyStep1);
    TransHopMeta hi1 = new TransHopMeta(getXMLDataStep, dummyStep1);
    transMeta.addTransHop(hi1);
    // Now execute the transformation...
    Trans trans = new Trans(transMeta);
    trans.prepareExecution(null);
    StepInterface si = trans.getStepInterface(dummyStepname1, 0);
    RowStepCollector dummyRc1 = new RowStepCollector();
    si.addRowListener(dummyRc1);
    RowProducer rp = trans.addRowProducer(injectorStepname, 0);
    trans.startThreads();
    // add rows
    List<RowMetaAndData> inputList = createData();
    Iterator<RowMetaAndData> it = inputList.iterator();
    while (it.hasNext()) {
        RowMetaAndData rm = it.next();
        rp.putRow(rm.getRowMeta(), rm.getData());
    }
    rp.finished();
    trans.waitUntilFinished();
    // Compare the results
    List<RowMetaAndData> resultRows = dummyRc1.getRowsWritten();
    List<RowMetaAndData> goldenImageRows = createResultData1();
    GetXMLDataData getXMLDataData = new GetXMLDataData();
    GetXMLData getXmlData = new GetXMLData(dummyStep1, getXMLDataData, 0, transMeta, trans);
    getXmlData.setVariable("xml_path", "data/owner");
    getXmlData.init(gxdm, getXMLDataData);
    assertEquals(gxdm.getInputFields()[0].getXPath(), "${xml_path}");
}