developerworks

Digital Toolchain for Book Authors

	// src/useWasm.js
	export const useWasm = (fileName, imports) => {
	const [state, setState] = useState(null);
	useEffect(() => {
	const fetchWasm = async () => {
	const wasm = await fetch(fileName);
	const instance = await AsBind.instantiate(wasm, imports);
	setState(instance);
	};
	fetchWasm();

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
	<script type="text/javascript">
	$(function() {
	window.WebSocket = window.WebSocket \|\| window.MozWebSocket;

	var websocket = new WebSocket('ws://127.0.0.1:9000',

	defmodule CommentPath do
	@moduledoc"""
	Comment [closure table](http://www.slideshare.net/billkarwin/models-for-hierarchical-data).
	"""

	@primary_key false
	schema "comment_paths" do
	field :ancestor_id, Ecto.UUID
	field :descendant_id, Ecto.UUID
	field :depth, :integer

	----------------------------------------------------------------------------------------
	-- This function is used to update paths when inserted a new node
	----------------------------------------------------------------------------------------

	DROP FUNCTION IF EXISTS after_insert_node();

	-- Step 1: Create a function used to update paths

	CREATE OR REPLACE FUNCTION after_insert_node() RETURNS TRIGGER LANGUAGE PLPGSQL AS $$
	BEGIN

	➜ tmp git clone https://github.com/jekens/ranch_test.git
	Cloning into 'ranch_test'...
	remote: Counting objects: 21, done.
	remote: Compressing objects: 100% (16/16), done.
	remote: Total 21 (delta 2), reused 21 (delta 2), pack-reused 0
	Unpacking objects: 100% (21/21), done.
	Checking connectivity... done.

	➜ tmp cd ranch_test

	ubuntu:~/systemtap/systemtap-3.0/testsuite/systemtap.examples/network$ sudo stap -vv /home/ycc/systemtap/systemtap-3.0/testsuite/systemtap.examples/network/nettop.stp
	Systemtap translator/driver (version 3.0/0.166, non-git sources)
	Copyright (C) 2005-2015 Red Hat, Inc. and others
	This is free software; see the source for copying conditions.
	enabled features: NLS TR1_UNORDERED_MAP
	Created temporary directory "/tmp/stapZuz725"
	Session arch: x86_64 release: 4.2.0-36-generic
	Kernel symbol table /lib/modules/4.2.0-36-generic/build/System.map unavailable, (No such file or directory)
	Searched for library macro files: "/usr/local/share/systemtap/tapset/linux/*.stpm", found: 5, processed: 5
	Searched for library macro files: "/usr/local/share/systemtap/tapset/*.stpm", found: 8, processed: 8

	> build with kerl configurre option is:

	> KERL_CONFIGURE_OPTIONS="--disable-native-libs --enable-vm-probes --with-dynamic-trace=systemtap --with-ssl=/usr/local --enable-hipe --enable-kernel-poll --without-odbc --enable-threads --enable-sctp --enable-smp-support --enable-sharez-zlib --enable-dynamic-ssl-lib"

	> When i list the probes about erlang, the result is ok

	```
	ubuntu@ubuntu:~/systemtap$ stap -L 'process("/home/ubuntu/.kerl/builds/18.3_dtrace/release_18.3/erts-7.3/bin/beam.smp").mark("*")' \|grep message
	process("/home/ubuntu/.kerl/builds/18.3_dtrace/release_18.3/erts-7.3/bin/beam.smp").mark("message__queued") $arg1:long $arg2:long $arg3:long $arg4:long $arg5:long $arg6:long
	process("/home/ubuntu/.kerl/builds/18.3_dtrace/release_18.3/erts-7.3/bin/beam.smp").mark("message__receive") $arg1:long $arg2:long $arg3:long $arg4:long $arg5:long $arg6:long

	%% Author: Alex Radetsky <[email protected]>
	%% Module: Simple SMPP Server on Erlang, gen_fsm, ranch, smpp34pdu.
	%% It always authorize bind_transceiver and receives submit_sm

	-module(smpp_protocol).
	-behaviour(gen_fsm).
	-behaviour(ranch_protocol).

	-include_lib("smpp34pdu/include/smpp34pdu.hrl").

	import psycopg2
	from riak import RiakClient, RiakObject
	from riak.datatypes import Set
	import datetime

	# Riak connection and set
	client = RiakClient(pb_port=8087)
	SETS_BUCKET = client.bucket_type('sets').bucket('key_sets')

	# Get columns for table