@SuppressWarnings("ConstantConditions")
			@Override
			public boolean start(File dir, boolean safe) {
				if (safe) {
					perfTestService.markProgress(perfTest, "Safe file distribution mode is enabled.");
					return safe;
				}
				long sizeOfDirectory = FileUtils.sizeOfDirectory(dir);
				if (sizeOfDirectory > safeThreshold) {
					perfTestService.markProgress(perfTest, "The total size of distributed files is over "
							+ UnitUtils.byteCountToDisplaySize(safeThreshold) + ".\n- Safe file distribution mode is enabled by force.");
					return true;
				}
				return safe;
			}
Distribute files to agents.

@param perfTest      perftest
@param singleConsole console to be used.
ngrinder-controller/src/main/java/org/ngrinder/perftest/service/PerfTestRunnable.java