private static String coord_latest_sync(int offset) throws Exception {
if (offset > 0) {
throw new RuntimeException("For latest there is no meaning " + "of positive instance. n should be <=0"
+ offset);
}
ELEvaluator eval = ELEvaluator.getCurrent();
String retVal = "";
int datasetFrequency = (int) getDSFrequency();// in minutes
TimeUnit dsTimeUnit = getDSTimeUnit();
int[] instCount = new int[1];
Calendar nominalInstanceCal = getCurrentInstance(getActualTime(), instCount);
if (nominalInstanceCal != null) {
Calendar initInstance = getInitialInstanceCal();
SyncCoordDataset ds = (SyncCoordDataset) eval.getVariable(DATASET);
if (ds == null) {
throw new RuntimeException("Associated Dataset should be defined with key " + DATASET);
}
String uriTemplate = ds.getUriTemplate();
Configuration conf = (Configuration) eval.getVariable(CONFIGURATION);
if (conf == null) {
throw new RuntimeException("Associated Configuration should be defined with key " + CONFIGURATION);
}
int available = 0;
boolean resolved = false;
String user = ParamChecker
.notEmpty((String) eval.getVariable(OozieClient.USER_NAME), OozieClient.USER_NAME);
String doneFlag = ds.getDoneFlag();
while (nominalInstanceCal.compareTo(initInstance) >= 0) {
ELEvaluator uriEval = getUriEvaluator(nominalInstanceCal);
String uriPath = uriEval.evaluate(uriTemplate, String.class);
String pathWithDoneFlag = uriPath;
if (doneFlag.length() > 0) {
pathWithDoneFlag += "/" + doneFlag;
}
if (isPathAvailable(pathWithDoneFlag, user, null, conf)) {