devinrsmith

Cap’n Proto to Java

Note: this guide assumes Fedora, steps may be different for other OSes.

Install capnproto

sudo dnf install capnproto

devinrsmith

#
# Copyright 2022 Deephaven Data Labs
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software

devinrsmith

import sys
import jpyutil

jpy_properties = {
    'jpy.pythonPrefix': sys.prefix,
    'jpy.programName': sys.executable,
    'jpy.pythonLib': jpyutil._find_python_dll_file(fail=True),
    'jpy.jpyLib': jpyutil._get_module_path('jpy', fail=True),
    'jpy.jdlLib': jpyutil._get_module_path('jdl', fail=True)
}

devinrsmith

# https://deephaven.io
from deephaven import agg, parquet, empty_table, merge

# Everything pre-whiteout
# https://www.reddit.com/r/place/comments/tzboys/the_rplace_parquet_dataset/
place = parquet.read('2022_place_deephaven.parquet')\
    .where("k<155926002")

# 2000 x 2000 grid
all_pixels = empty_table(2000).view(["x1=(short)i"])\

devinrsmith

/*
 * Copyright 2022 Deephaven Data Labs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

devinrsmith

Keybase proof

I hereby claim:

• I am devinrsmith on github.
• I am thundza (https://keybase.io/thundza) on keybase.
• I have a public key ASAlSaR_IWYFj5wrQStDmkdbokcE2XRud33tT8jBjO-npgo

To claim this, I am signing this object:

devinrsmith

import java.util.function.Supplier;

/**
 * Created by dsmith on 2/16/15.
 *
 * https://en.wikipedia.org/wiki/Double-checked_locking
 *
 */
public class DoubleCheckedSupplier<T> implements Supplier<T> {
    public static <T> Supplier<T> of(Supplier<T> supplier) {

devinrsmith

$ ./build/install/classgraph-benchmark/invoke.sh
Running a classgraph benchmark focused on startup speed
For more information, see https://github.com/devinrsmith/classgraph-benchmark

classloader META-INF/maven/com.google.guava/guava/pom.xml 2 84a3ee12 17 56
real 0.10
user 0.13
sys 0.03
classgraph META-INF/maven/com.google.guava/guava/pom.xml 2 84a3ee12 122 162

devinrsmith

devinrsmith

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;

/**
 * Created by dsmith on 4/8/15.
 */
public class UrlTest {
    public static void main(String[] args) throws IOException {
        final HttpURLConnection urlConnection = (HttpURLConnection)