public void reduce(GFKey key, Iterable<PEIWritable> values, Context context)
throws IOException, InterruptedException {
// For a particular key ... process all records and output what we would have expected in this
// concKnownKeys test
// Note that we either
// 1. do a single create
// 2. create + update
// 3. create + destroy
// look at all ops ... and output either
// 1. create
// 2. create (with value from update)
// 3. do nothing (overall result is destroy, so do not create the entry in the gemfire
// validation region
String keyStr = (String) key.getKey();
ValueHolder updateValue = null;
ValueHolder createValue = null;
boolean destroyed = false;
System.out.println("KnownKeysMRv2.reduce() invoked with " + keyStr);
for (PEIWritable value : values) {
PersistedEventImpl event = value.getEvent();
Operation op = event.getOperation();
ValueHolder vh = null;
if (op.isDestroy()) {
destroyed = true;
} else {
try {
vh = (ValueHolder) event.getDeserializedValue();
} catch (ClassNotFoundException e) {
System.out.println(
"KnownKeysMRv2.map() caught " + e + " : " + TestHelper.getStackTrace(e));
}
if (op.isUpdate()) {
updateValue = vh;
} else {
createValue = vh;
}
}
System.out.println(
"KnownKeysMRv2.reduce() record: "
+ op.toString()
+ ": key = "
+ keyStr
+ " and op "
+ op.toString());
}
if (!destroyed) {
if (updateValue != null) {
context.write(key.getKey(), updateValue);
} else {
context.write(key.getKey(), createValue);
}
}
}
// Identity mapper (log and write out processed key/value pairs, the value is the
// PersistedEventImpl)
public void map(GFKey key, PersistedEventImpl value, Context context)
throws IOException, InterruptedException {
String keyStr = (String) key.getKey();
Operation op = value.getOperation();
ValueHolder entryValue = null;
System.out.println("map method invoked with " + keyStr + " " + op.toString());
try {
entryValue = (ValueHolder) value.getDeserializedValue();
} catch (ClassNotFoundException e) {
System.out.println("KnownKeysMRv2.map() caught " + e + " : " + TestHelper.getStackTrace(e));
}
context.write(key, new PEIWritable(value));
}