otp

Are there functions which would allow an OTP process to find the pid of its supervisor? The data is hidden in the process dictionary (of any process spawned with proc_lib ) under the entry '$ancestors' : 1> proc_lib:spawn(fun() -> timer:sleep(infinity) end). <0.33.0> 2> i(0,33,0). [{current_function,{timer,sleep,1}}, {initial_call,{proc_lib,init_p,3}}, {status,waiting}, {message_queue_len,0}, {messages,[]}, {links,[]}, {dictionary,[{'$ancestors',[<0.31.0>]}, {'$initial_call',{erl_eval,'-expr/5-fun-1-',0}}]}, {trap_exit,false}, {error_handler,error_handler}, {priority,normal}, {group_leader,<0

I'm making a application in Erlang, with a GUI in Java. I've managed to establish a connection between the to languages, but now i need to (i guess) send a message from Java to Erlang, every time I e.g press a button. Is that the right way to go? How would such a message look? I've found a few good sites about this form of integration, but I feel like im not getting everything. http://www.trapexit.org/How_to_communicate_java_and_erlang If jinterface is too complicated you might just use the packet option on open_port and use byte[] in_buf = new byte[256]; byte[] out_buf = new byte[256]; int in

Unsatisfied with my current approach I'm just trying to redesign the way I build protocol stacks in Erlang. The feature ordered by importance: Performance Flexibility and implementation speed adding new protocol variants It would help development to explore the protocol variants from the shell My current model ( alreday described in this question ) is getting at its limits besides the ugly asymmetry of send() by function call and receive by message. The overall picture of the whole protocol engine looks like this: Bottom part: There a several ports or maybe also sometimes a gen_tcp at the

I'm paying with distributed erlang applications. Configuration and ideas are taken from: http:/www.erlang.org/doc/pdf/otp-system-documentation.pdf 9.9. Distributed Applications We have 3 nodes: n1@a2-X201, n2@a2-X201, n3@a2-X201 We have application wd that do some useful job :) Configuration files: wd1.config - for the first node: [{kernel, [{distributed,[{wd,5000,['n1@a2-X201',{'n2@a2-X201','n3@a2-X201'}]}]}, {sync_nodes_mandatory,['n2@a2-X201','n3@a2-X201']}, {sync_nodes_timeout,5000} ]} ,{sasl, [ %% All reports go to this file {sasl_error_logger,{file,"/tmp/wd_n1.log"}} ] }]. wd2.config for

一、安装Erlang环境 1、在安装erlang之前先安装下依赖文件(这一步不要忘掉了， 不然后面./configure的时候要报错)： yum install gcc glibc-devel make ncurses-devel openssl-devel xmlto 2.到erlang官网去下载erlang安装包 wget -c http://erlang.org/download/otp_src_20.2.tar.gz 接下来解压： tar -zxvf otp_src_20.2.tar.gz cd otp_src_20.2/ 3. 编译安装 ./configure --prefix=/usr/local/erlang make && make install 4、测试安装是否成功： cd /usr/local/erlang/bin/ ./erl halt(). 退出控制台 5、配置环境变量 vim /etc/profile 在末尾加入这么一行即可：export PATH=$PATH:/usr/local/erlang/bin　 source /etc/profile 二、安装rabbitmq 　1、到官网下载最新安装包： http://www.rabbitmq.com/releases/rabbitmq-server/ wget -c http://www.rabbitmq

Mainly I want to know if I can send a function in a message in a distributed erlang setup. on Machine 1 F1 = Fun()-> hey end, gen_server:call(on_other_machine,F1) on Machine 2 handler_call(Function,From,State) -> {reply,Function(),State) make sense? Here 's an interesting article about "passing fun's to other Erlang nodes". To resume it briefly: [...] As you might know, Erlang distribution works by sending the binary encoding of terms; and so sending a fun is also essentially done by encoding it using erlang:term_to_binary/1; passing the resulting binary to another node, and then decoding it