Posts
News in Boon
Boon 0.11 is out. Thanks Stephane Landelle! Boon JSON parser still faster than GSON and Jackson. Up to 3x faster.
Added lightweight JSON DI container that supports @Inject, @PostConstruct, @Required, @Autowire, and more.
public class CoffeeApp implements Runnable {
@Inject
CoffeeMaker coffeeMaker;
@Inject
Coffee coffee;
@Inject
Sugar sugar;
@Inject
Bacon bacon;
@Inject
@Named( "brown" )
Bacon brownBacon;
JSON support now support @JsonProperty, @JsonView, and more. Learn more here: http://rick-hightower.blogspot.com/2014/01/boon-json-in-five-minutes-faster-json.html
Wrote invoker library to work JSON posts. It is a better way to do REST and WebSocket with Boon.
Wrote functional library based on work that I did with EasyJava.
You can do reflection based filters or regular Predicate filters.
List<Employee> list = list( new Employee("Bob"), new Employee("Sally") );
setListProperty( list, "salary", 200 );
list.addAll(Lists.list(new Employee("Rick"), new Employee("Joe")));
//Reflection
List<Employee> filtered = filterBy(list, new Object() {
boolean t(Employee e) { return e.salary>150; }
});
...
//Predicate based
List<Employee> filtered = filterBy(list, new Predicate<Employee>() {
@Override
public boolean test(Employee input) {
return input.salary > 150;
}
});
My goal is take some previous work that I did with invoke dynamic and make the reflection based predicate faster than the Predicate interface.
You can also filter with static or non-static methods
List<Employee> filtered = filterBy(list, ListsTest.class, "filterBySalary");
...
List<Employee> filtered = filterBy(list, this, "filterBySalaryMethod");
Also don't forget that Boon ships with a full in-memory query engine that is actually faster than the predicate based filters.
List<Employee> filtered = query( list, gt("salary", 150) );
Learn more about the Boon data repo here:
But I digress back to functional framework:
The usual suspects are here:
...
//Reflection Mapper -- Convert Employee object into HRObject
List<HRObject> wrap = (List<HRObject>) mapBy(list, new Object() {
HRObject hr(Employee e) {return new HRObject(e);}
});
...
//Reflection static or non-static methods
List<HRObject> wrap = (List<HRObject>) mapBy(list, ListsTest.class, "createHRO" );
List<HRObject> wrap = (List<HRObject>) mapBy(list, this, "createHROMethod" );
...
//Constructor mapping
List<Employee> list = list(new Employee("Bob"), new Employee("Sally"));
List<HRObject> wrap = wrap(HRObject.class, list);
...
//
List<Employee> list = list( new Employee("Bob"), new Employee("Sally"));
List<HRObject> wrap = mapBy( list, new Function<Employee, HRObject>() {
@Override
public HRObject apply(Employee employee) {
return new HRObject(employee);
}
});
Here is one you don't see much:
@Test
public void reduce() {
long sum = (int) reduceBy(Lists.list(1,2,3,4,5,6,7,8), new Object() {
int sum(int s, int b) {return s+b;}
});
boolean ok = sum == 36 || die();
puts (sum);
sum = (long) reduceBy(new Integer[]{1,2,3,4,5,6,7,8}, new Object() {
long sum(long s, int b) {return s+b;}
});
ok &= sum == 36 || die();
sum = (long) reduceBy(new int[]{1,2,3,4,5,6,7,8}, new Object() {
long sum(long s, int b) {return s+b;}
});
ok &= sum == 36 || die();
sum = (long) reduceBy(Lists.list(1,2,3,4,5,6,7,8), new Reducer<Integer, Integer>() {
@Override
public Integer apply(Integer sum, Integer v) {
return sum == null ? v : sum + v;
}
}).longValue();
}
EasyJava had currying and all sorts of wild stuff, so I might port some of that here. I might not. Let me know.
String Parsing.... Boon has really fast String parsing about 2x speed what you could do with JDK readily, and a smaller GC foot print so instead of this:
static Pattern newLine = Pattern.compile("(\n|\r)");
...
int i=0;
String[] splitLines = newLine.split(str);
String[] stats;
for (String line : splitLines) {
stats = line.split( ",");
i += Integer.parseInt(stats[1]);
}
return i;
You can do this (for 2x speed and a lot less GC overhead):
int i=0;
String[] splitLines = splitLines(str);
String[] stats;
for (String line : splitLines) {
stats = splitComma(line);
i += Integer.parseInt(stats[1]);
}
return i;
Or even this (2.5x faster and even less GC overhead):
char[] chars = toCharArray(csv);
int i=0;
char[][] splitLines = splitLines(chars);
char[][] stats;
for (char[] line : splitLines) {
stats = splitComma(line);
i += parseInt(stats[1]);
}
return i;
Boon is not just fast. Boon is a flame throwing, turbo-charged, get-out-of-the-way-I-am-coming-in, speed-demon that sips GC, and makes CPUs and virtual cores wish they went into dentistry.
