jmeter：找到当前sampler的根节点

- private final HashTree testTree;
+ public final HashTree testTree;

- private transient TransactionSampler transactionSampler;
+ public transient TransactionSampler transactionSampler;

Sampler sam = ctx.getCurrentSampler();
// Find parent controllers of current sampler
FindTestElementsUpToRootTraverser pathToRootTraverser=null;
TransactionSampler transactionSampler = null;
if(sam instanceof TransactionSampler) {
    transactionSampler = (TransactionSampler) sam;
    pathToRootTraverser = new FindTestElementsUpToRootTraverser((transactionSampler).getTransactionController());
} else {
    pathToRootTraverser = new FindTestElementsUpToRootTraverser(sam);
}
ctx.getThread().testTree.traverse(pathToRootTraverser);
List controllersToReinit = pathToRootTraverser.getControllersToRoot();
 
// Trigger end of loop condition on all parent controllers of current sampler
System.out.println("============================== " + prev.getSampleLabel());
for (Iterator iterator = controllersToReinit.iterator(); iterator.hasNext();) {
    Controller parentController =  (Controller)iterator.next();
    System.out.println("    " + parentController.getName());
}