@Override
public Integer apply(Writable from) {
if (!(from instanceof Invocation)) return HConstants.NORMAL_QOS;
Invocation inv = (Invocation) from;
String methodName = inv.getMethodName();
Integer priorityByAnnotation = annotatedQos.get(methodName);
if (priorityByAnnotation != null) {
return priorityByAnnotation;
}
// scanner methods...
if (methodName.equals("next") || methodName.equals("close")) {
// translate!
Long scannerId;
try {
scannerId = (Long) inv.getParameters()[0];
} catch (ClassCastException ignored) {
// LOG.debug("Low priority: " + from);
return HConstants.NORMAL_QOS;
}
String scannerIdString = Long.toString(scannerId);
RegionScanner scanner = scanners.get(scannerIdString);
if (scanner != null && scanner.getRegionInfo().isMetaTable()) {
// LOG.debug("High priority scanner request: " + scannerId);
return HConstants.HIGH_QOS;
}
} else if (inv.getParameterClasses().length == 0) {
// Just let it through. This is getOnlineRegions, etc.
} else if (inv.getParameterClasses()[0] == byte[].class) {
// first arg is byte array, so assume this is a regionname:
if (isMetaTable((byte[]) inv.getParameters()[0])) {
// LOG.debug("High priority with method: " + methodName +
// " and region: "
// + Bytes.toString((byte[]) inv.getParameters()[0]));
return HConstants.HIGH_QOS;
}
} else if (inv.getParameterClasses()[0] == MultiAction.class) {
MultiAction<?> ma = (MultiAction<?>) inv.getParameters()[0];
Set<byte[]> regions = ma.getRegions();
// ok this sucks, but if any single of the actions touches a meta, the
// whole
// thing gets pingged high priority. This is a dangerous hack because
// people