Add Process Manager example with server and clustering

A simple Process Manager ( like PM2 ) made with nodepp; <65 LOC

Author: EDBCREPO

examples/17-Process-Manager.cpp

@@ -0,0 +1,65 @@
+#include <nodepp/nodepp.h>
+#include <nodepp/worker.h>
+#include <nodepp/date.h>
+#include <nodepp/http.h>
+#include <nodepp/cluster.h>
+
+using namespace nodepp;
+
+/*────────────────────────────────────────────────────────────────────────────*/
+
+void server( int x ){
+
+    auto server = http::server([=]( http_t cli ){ 
+
+        console::log( cli.path, cli.get_fd() );
+        
+        cli.write_header( 200, header_t({
+            { "content-type", "text/html" }
+        }));
+        
+        cli.write( date::fulltime() );
+        cli.close();
+
+    });
+
+    server.listen( "localhost", 8000, [=]( socket_t server ){
+        console::log("server started at http://localhost:8000");
+    });
+
+}
+
+/*────────────────────────────────────────────────────────────────────────────*/
+
+void spawn( int x ) {
+
+    auto cid = regex::format( "?CPU=${0}", x );
+    auto pid = cluster::add( ptr_t<string_t>({ cid }) );
+
+    if( pid.has_value() ){
+        pid.value().onClose.once([=](){ spawn(x); });
+        pid.value().onData([=]( string_t msg ){
+            conio::log( msg );
+        });
+    }
+
+}
+
+/*────────────────────────────────────────────────────────────────────────────*/
+
+void onMain(){ 
+
+    os::set_process_priority( os::PRIORITY::HIGH_PRIORITY );
+    os::set_hard_fileno/*-*/( (uint)-1 );
+    os::set_soft_fileno/*-*/( (uint)-1 );
+
+    int y = string::to_uint( process::env::get( "CPU" ) );
+
+    for  ( auto x=os::cpus(); x-->0; ){
+    if   ( cluster::is_child() )
+         { server(y); break; } 
+    else { spawn (x); } }
+
+}
+
+/*────────────────────────────────────────────────────────────────────────────*/