@SuppressWarnings("unchecked")
public static Long getExpressValue(Map map, String expressionStr) throws ParseException {
Long expValue = 0L;
map = instanlExpressMap(map);
if (!StringUtils.isNullObject(expressionStr)) {
JexlEngine jexl = JexlManager.getJexlEngine();
Expression expression = jexl.createExpression(expressionStr);
JexlContext jexlContext = new MapContext(map);
Object obj = (Object) expression.evaluate(jexlContext);
if (null != obj) {
BigDecimal b = new BigDecimal(obj.toString());
b = b.setScale(0, BigDecimal.ROUND_HALF_UP);
expValue = b.longValue();
}
}
return expValue;
}
/**
* Function that looks for expressions to parse. It parses backwards to capture embedded
* expressions
*
* @param value
* @param last
* @param jexl
* @return
*/
private static String resolveVariableExpression(String value, int last, JexlEngine jexl) {
int lastIndex = value.lastIndexOf("$(", last);
if (lastIndex == -1) {
return value;
}
// Want to check that everything is well formed, and that
// we properly capture $( ...(...)...).
int bracketCount = 0;
int nextClosed = lastIndex + 2;
for (; nextClosed < value.length(); ++nextClosed) {
if (value.charAt(nextClosed) == '(') {
bracketCount++;
} else if (value.charAt(nextClosed) == ')') {
bracketCount--;
if (bracketCount == -1) {
break;
}
}
}
if (nextClosed == value.length()) {
throw new IllegalArgumentException("Expression " + value + " not well formed.");
}
String innerExpression = value.substring(lastIndex + 2, nextClosed);
Object result = null;
try {
Expression e = jexl.createExpression(innerExpression);
result = e.evaluate(new MapContext());
} catch (JexlException e) {
throw new IllegalArgumentException(
"Expression " + value + " not well formed. " + e.getMessage(), e);
}
if (result == null) {
// for backward compatibility it is best to return value
return value;
}
String newValue =
value.substring(0, lastIndex) + result.toString() + value.substring(nextClosed + 1);
return resolveVariableExpression(newValue, lastIndex, jexl);
}
/**
* Method for creating JexlVCMatchExp from input walker arguments mapping from names to exps.
* These two arrays contain the name associated with each JEXL expression. initializeMatchExps
* will parse each expression and return a list of JexlVCMatchExp, in order, that correspond to
* the names and exps. These are suitable input to match() below.
*
* @param names_and_exps mapping of names to expressions
* @return list of matches
*/
public static List<JexlVCMatchExp> initializeMatchExps(Map<String, String> names_and_exps) {
List<JexlVCMatchExp> exps = new ArrayList<JexlVCMatchExp>();
for (Map.Entry<String, String> elt : names_and_exps.entrySet()) {
String name = elt.getKey();
String expStr = elt.getValue();
if (name == null || expStr == null)
throw new IllegalArgumentException(
"Cannot create null expressions : " + name + " " + expStr);
try {
Expression exp = engine.createExpression(expStr);
exps.add(new JexlVCMatchExp(name, exp));
} catch (Exception e) {
throw new UserException.BadArgumentValue(
name,
"Invalid expression used ("
+ expStr
+ "). Please see the JEXL docs for correct syntax.");
}
}
return exps;
}
private void execute(String config) throws ConnectionException, IOException {
NotificationConfig c = NotificationConfig.fromXml(new File(config));
MessageFilter dupFilter = DuplicateMessageFilter.createFilter();
GdcRESTApiWrapper rest = null;
try {
for (NotificationMessage m : c.getMessages()) {
String dupFilterKind = m.getDupFilterKind();
if (dupFilterKind != null && dupFilterKind.length() > 0) {
if (!dupFilter.filter(m.getMessage(), dupFilterKind)) {
l.debug("Message filtered out by the dup kind filter.");
l.info("Message filtered out by the dup kind filter.");
continue;
}
}
rest = new GdcRESTApiWrapper(cliParams.getHttpConfig());
rest.login();
Expression e = null;
JexlEngine jexl = new JexlEngine();
e = jexl.createExpression(m.getCondition());
JexlContext jc = new MapContext();
List<Metric> metrics = m.getMetrics();
double[] values = null;
if (metrics != null && metrics.size() > 0) {
values = new double[metrics.size()];
for (int i = 0; i < metrics.size(); i++) {
values[i] = rest.computeMetric(metrics.get(i).getUri());
jc.set(metrics.get(i).getAlias(), new Double(values[i]));
}
}
String[] texts = null;
List<Report> reports = m.getReports();
if (reports != null && reports.size() > 0) {
texts = new String[reports.size()];
for (int i = 0; i < reports.size(); i++) {
texts[i] = rest.computeReport(reports.get(i).getUri());
}
}
boolean result = decide(e.evaluate(jc));
if (result) {
NotificationTransport t = selectTransport(m.getUri());
String msg = m.getMessage();
if (values != null && values.length > 0 && metrics != null && metrics.size() > 0) {
for (int i = 0; i < metrics.size(); i++) {
String fmt = metrics.get(i).getFormat();
if (fmt == null || fmt.length() <= 0) fmt = DEFAULT_FORMAT;
DecimalFormat df = new DecimalFormat(fmt);
msg = msg.replace("%" + metrics.get(i).getAlias() + "%", df.format(values[i]));
}
}
if (texts != null && texts.length > 0 && reports != null && reports.size() > 0) {
for (int i = 0; i < reports.size(); i++) {
msg = msg.replace("%" + reports.get(i).getAlias() + "%", texts[i]);
}
}
String dupFilterExact = m.getDupFilterExact();
if (dupFilterExact != null && dupFilterExact.length() > 0) {
if (!dupFilter.filter(msg, dupFilterExact)) {
l.debug("Message filtered out by the dup exact filter.");
l.info("Message filtered out by the dup exact filter.");
continue;
}
}
String fmt = m.getMessageTimestampFormat();
if (fmt != null && fmt.length() > 0) t.send(msg + " (at " + getTimestamp(fmt) + ")");
else t.send(msg);
dupFilter.update(msg);
dupFilter.update(m.getMessage());
l.info("Notification sent.");
}
}
dupFilter.save();
rest.logout();
} catch (Exception e) {
throw new IOException(e);
} finally {
if (rest != null) rest.logout();
}
}