api/src/api/v2.js

@@ -172,9 +172,9 @@ router.use((req, res, next) => {
 
 router.ws('/connect', async (ws, req) => {
     let job = null;
-    let event_bus = new events.EventEmitter();
+    let eventBus = new events.EventEmitter();
 
-    event_bus.on('stdout', data =>
+    eventBus.on('stdout', data =>
         ws.send(
             JSON.stringify({
                 type: 'data',
@@ -183,7 +183,7 @@ router.ws('/connect', async (ws, req) => {
             })
         )
     );
-    event_bus.on('stderr', data =>
+    eventBus.on('stderr', data =>
         ws.send(
             JSON.stringify({
                 type: 'data',
@@ -192,10 +192,10 @@ router.ws('/connect', async (ws, req) => {
             })
         )
     );
-    event_bus.on('stage', stage =>
+    eventBus.on('stage', stage =>
         ws.send(JSON.stringify({ type: 'stage', stage }))
     );
-    event_bus.on('exit', (stage, status) =>
+    eventBus.on('exit', (stage, status) =>
         ws.send(JSON.stringify({ type: 'exit', stage, ...status }))
     );
 
@@ -218,8 +218,7 @@ router.ws('/connect', async (ws, req) => {
                             })
                         );
 
-                        await job.execute(event_bus);
-                        await job.cleanup();
+                        await job.execute_interactive(eventBus);
 
                         ws.close(4999, 'Job Completed');
                     } else {
@@ -229,7 +228,7 @@ router.ws('/connect', async (ws, req) => {
                 case 'data':
                     if (job !== null) {
                         if (msg.stream === 'stdin') {
-                            event_bus.emit('stdin', msg.data);
+                            eventBus.emit('stdin', msg.data);
                         } else {
                             ws.close(4004, 'Can only write to stdin');
                         }
@@ -240,7 +239,7 @@ router.ws('/connect', async (ws, req) => {
                 case 'signal':
                     if (job !== null) {
                         if (SIGNALS.includes(msg.signal)) {
-                            event_bus.emit('signal', msg.signal);
+                            eventBus.emit('signal', msg.signal);
                         } else {
                             ws.close(4005, 'Invalid signal');
                         }
@@ -256,6 +255,12 @@ router.ws('/connect', async (ws, req) => {
         }
     });
 
+    ws.on('close', async () => {
+        if (job !== null) {
+            await job.cleanup();
+        }
+    });
+
     setTimeout(() => {
         //Terminate the socket after 1 second, if not initialized.
         if (job === null) ws.close(4001, 'Initialization Timeout');

api/src/job.js

@@ -18,7 +18,14 @@ let uid = 0;
 let gid = 0;
 
 let remaining_job_spaces = config.max_concurrent_jobs;
-let job_queue = [];
+let jobQueue = [];
+
+setInterval(() => {
+    // Every 10ms try resolve a new job, if there is an available slot
+    if (jobQueue.length > 0 && remaining_job_spaces > 0) {
+        jobQueue.shift()();
+    }
+}, 10);
 
 class Job {
     #active_timeouts;
@@ -74,9 +81,10 @@ class Job {
         if (remaining_job_spaces < 1) {
             this.logger.info(`Awaiting job slot`);
             await new Promise(resolve => {
-                job_queue.push(resolve);
+                jobQueue.push(resolve);
             });
         }
+
         this.logger.info(`Priming job`);
         remaining_job_spaces--;
         this.logger.debug('Writing files to job cache');
@@ -118,11 +126,6 @@ class Job {
         this.#active_timeouts = [];
         this.logger.debug('Cleared the active timeouts');
 
-        this.cleanup_processes();
-        this.logger.debug(`Finished exit cleanup`);
-    }
-
-    close_cleanup() {
         for (const proc of this.#active_parent_processes) {
             proc.stderr.destroy();
             if (!proc.stdin.destroyed) {
@@ -132,10 +135,13 @@ class Job {
             proc.stdout.destroy();
         }
         this.#active_parent_processes = [];
-        this.logger.debug('Destroyed processes writables');
+        this.logger.debug('Destroyed parent processes writables');
+
+        this.cleanup_processes();
+        this.logger.debug(`Finished exit cleanup`);
     }
 
-    async safe_call(file, args, timeout, memory_limit, event_bus = null) {
+    async safe_call(file, args, timeout, memory_limit, eventBus = null) {
         return new Promise((resolve, reject) => {
             const nonetwork = config.disable_networking ? ['nosocket'] : [];
 
@@ -147,10 +153,7 @@ class Job {
             ];
 
             const timeout_call = [
-                'timeout',
-                '-s',
-                '9',
-                Math.ceil(timeout / 1000),
+                'timeout', '-s', '9', Math.ceil(timeout / 1000),
             ];
 
             if (memory_limit >= 0) {
@@ -181,16 +184,16 @@ class Job {
 
             this.#active_parent_processes.push(proc);
 
-            if (event_bus === null) {
+            if (eventBus === null) {
                 proc.stdin.write(this.stdin);
                 proc.stdin.end();
                 proc.stdin.destroy();
             } else {
-                event_bus.on('stdin', data => {
+                eventBus.on('stdin', data => {
                     proc.stdin.write(data);
                 });
 
-                event_bus.on('kill', signal => {
+                eventBus.on('kill', signal => {
                     proc.kill(signal);
                 });
             }
@@ -205,8 +208,8 @@ class Job {
             this.#active_timeouts.push(kill_timeout);
 
             proc.stderr.on('data', async data => {
-                if (event_bus !== null) {
-                    event_bus.emit('stderr', data);
+                if (eventBus !== null) {
+                    eventBus.emit('stderr', data);
                 } else if (stderr.length > this.runtime.output_max_size) {
                     this.logger.info(`stderr length exceeded`);
                     process.kill(proc.pid, 'SIGKILL');
@@ -217,8 +220,8 @@ class Job {
             });
 
             proc.stdout.on('data', async data => {
-                if (event_bus !== null) {
-                    event_bus.emit('stdout', data);
+                if (eventBus !== null) {
+                    eventBus.emit('stdout', data);
                 } else if (stdout.length > this.runtime.output_max_size) {
                     this.logger.info(`stdout length exceeded`);
                     process.kill(proc.pid, 'SIGKILL');
@@ -228,24 +231,21 @@ class Job {
                 }
             });
 
-            proc.on('exit', () => this.exit_cleanup());
-
-            proc.on('close', (code, signal) => {
-                this.close_cleanup();
+            proc.on('exit', (code, signal) => {
+                this.exit_cleanup();
 
                 resolve({ stdout, stderr, code, signal, output });
             });
 
             proc.on('error', err => {
                 this.exit_cleanup();
-                this.close_cleanup();
 
                 reject({ error: err, stdout, stderr, output });
             });
         });
     }
 
-    async execute(event_bus = null) {
+    async execute() {
         if (this.state !== job_states.PRIMED) {
             throw new Error(
                 'Job must be in primed state, current state: ' +
@@ -256,54 +256,32 @@ class Job {
         this.logger.info(`Executing job runtime=${this.runtime.toString()}`);
 
         const code_files = this.files.filter(file => file.encoding == 'utf8');
+
+        this.logger.debug('Compiling');
+
         let compile;
         let compile_errored = false;
-        const { emit_event_bus_result, emit_event_bus_stage } =
-            event_bus === null
-                ? {
-                      emit_event_bus_result: () => {},
-                      emit_event_bus_stage: () => {},
-                  }
-                : {
-                      emit_event_bus_result: (stage, result, event_bus) => {
-                          const { error, code, signal } = result;
-                          event_bus.emit('exit', stage, {
-                              error,
-                              code,
-                              signal,
-                          });
-                      },
-                      emit_event_bus_stage: (stage, event_bus) => {
-                          event_bus.emit('stage', stage);
-                      },
-                  };
 
         if (this.runtime.compiled) {
-            this.logger.debug('Compiling');
-            emit_event_bus_stage('compile', event_bus);
             compile = await this.safe_call(
                 this.runtime.compile,
                 code_files.map(x => x.name),
                 this.timeouts.compile,
-                this.memory_limits.compile,
-                event_bus
+                this.memory_limits.compile
             );
-            emit_event_bus_result('compile', compile, event_bus);
             compile_errored = compile.code !== 0;
         }
 
         let run;
         if (!compile_errored) {
             this.logger.debug('Running');
-            emit_event_bus_stage('run', event_bus);
+
             run = await this.safe_call(
                 this.runtime.run,
                 [code_files[0].name, ...this.args],
                 this.timeouts.run,
-                this.memory_limits.run,
-                event_bus
+                this.memory_limits.run
             );
-            emit_event_bus_result('run', run, event_bus);
         }
 
         this.state = job_states.EXECUTED;
@@ -316,6 +294,52 @@ class Job {
         };
     }
 
+    async execute_interactive(eventBus) {
+        if (this.state !== job_states.PRIMED) {
+            throw new Error(
+                'Job must be in primed state, current state: ' +
+                    this.state.toString()
+            );
+        }
+
+        this.logger.info(
+            `Interactively executing job runtime=${this.runtime.toString()}`
+        );
+
+        const code_files = this.files.filter(file => file.encoding == 'utf8');
+
+        let compile_errored = false;
+        if (this.runtime.compiled) {
+            eventBus.emit('stage', 'compile');
+            const { error, code, signal } = await this.safe_call(
+                this.runtime.compile,
+                code_files.map(x => x.name),
+                this.timeouts.compile,
+                this.memory_limits.compile,
+                eventBus
+            );
+
+            eventBus.emit('exit', 'compile', { error, code, signal });
+            compile_errored = code !== 0;
+        }
+
+        if (!compile_errored) {
+            this.logger.debug('Running');
+            eventBus.emit('stage', 'run');
+            const { error, code, signal } = await this.safe_call(
+                this.runtime.run,
+                [code_files[0].name, ...this.args],
+                this.timeouts.run,
+                this.memory_limits.run,
+                eventBus
+            );
+
+            eventBus.emit('exit', 'run', { error, code, signal });
+        }
+
+        this.state = job_states.EXECUTED;
+    }
+
     cleanup_processes(dont_wait = []) {
         let processes = [1];
         const to_wait = [];
@@ -442,13 +466,9 @@ class Job {
         this.logger.info(`Cleaning up job`);
 
         this.exit_cleanup(); // Run process janitor, just incase there are any residual processes somehow
-        this.close_cleanup();
         await this.cleanup_filesystem();
 
         remaining_job_spaces++;
-        if (job_queue.length > 0) {
-            job_queue.shift()();
-        }
     }
 }