/*
* BSD 3-Clause License
*
* Copyright (c) 2015, Nicolas Riesco and others as credited in the AUTHORS file
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
module.exports = {
execute_request: execute_request,
complete_request: complete_request,
history_request: history_request,
kernel_info_request: kernel_info_request,
object_info_request: object_info_request,
shutdown_request: shutdown_request,
};
var DEBUG = global.DEBUG;
var log;
if (DEBUG) {
var console = require("console");
log = function log() {
process.stderr.write("KERNEL: ");
console.error.apply(this, arguments);
};
} else {
try {
log = require("debug")("KERNEL:");
} catch (err) {
log = function noop() {};
}
}
/**
* Send `status_busy` message
*
* @param {module:jmp~Message} request Request message
* @this Kernel
*/
function status_busy(request) {
request.respond(this.iopubSocket, "status", {
execution_state: "busy"
});
}
/**
* Send for `status_idle` message
*
* @param {module:jmp~Message} request Request message
* @this Kernel
*/
function status_idle(request) {
request.respond(this.iopubSocket, "status", {
execution_state: "idle"
});
}
/**
* Handler for `kernel_info_request` messages
*
* @param {module:jmp~Message} request Request message
* @this Kernel
*/
function kernel_info_request(request) {
status_busy.call(this, request);
request.respond(
this.shellSocket,
"kernel_info_reply",
this.kernelInfoReply,
{},
this.protocolVersion
);
status_idle.call(this, request);
}
/**
* Handler for `execute_request` messages
*
* @param {module:jmp~Message} request Request message
* @this Kernel
*/
function execute_request(request) {
this.session.execute(request.content.code, {
onSuccess: onSuccess.bind(this),
onError: onError.bind(this),
beforeRun: beforeRun.bind(this),
afterRun: afterRun.bind(this),
onStdout: onStdout.bind(this),
onStderr: onStderr.bind(this),
onDisplay: onDisplay.bind(this),
onRequest: onRequest.bind(this),
});
function beforeRun() {
status_busy.call(this, request);
this.executionCount++;
request.respond(
this.iopubSocket,
"pyin", {
execution_count: this.executionCount,
code: request.content.code,
}
);
}
function afterRun() {
status_idle.call(this, request);
}
function onSuccess(result) {
request.respond(
this.shellSocket,
"execute_reply", {
status: "ok",
execution_count: this.executionCount,
payload: [], // TODO(NR)
user_variables: {}, // TODO(NR)
user_expressions: {}, // TODO(NR)
}
);
if (!result.mime) {
return;
}
if (this.hideExecutionResult) {
return;
}
if (this.hideUndefined &&
result.mime["text/plain"] === "undefined") {
return;
}
request.respond(
this.iopubSocket,
"pyout", {
execution_count: this.executionCount,
data: result.mime,
metadata: {},
}
);
}
function onError(result) {
request.respond(
this.shellSocket,
"execute_reply", {
status: "error",
execution_count: this.executionCount,
ename: result.error.ename,
evalue: result.error.evalue,
traceback: result.error.traceback,
}
);
request.respond(
this.iopubSocket,
"pyerr", {
execution_count: this.executionCount,
ename: result.error.ename,
evalue: result.error.evalue,
traceback: result.error.traceback,
}
);
}
function onStdout(data) {
request.respond(
this.iopubSocket,
"stream", {
name: "stdout",
data: data,
}
);
}
function onStderr(data) {
request.respond(
this.iopubSocket,
"stream", {
name: "stderr",
data: data,
}
);
}
function onDisplay(update) {
request.respond(this.iopubSocket,
"display_data", {
data: update.mime,
metadata: {},
}
);
}
function onRequest(message, onReply) {
if (!message) {
log("REQUEST: Empty request");
return;
}
if (message.clear) {
var clearOutput = request.respond(
this.iopubSocket, "clear_output", message.clear
);
log("REQUEST: CLEAR_OUTPUT:", clearOutput);
return;
}
if (typeof onReply !== "function") {
log("REQUEST: Missing onReply callback");
return;
}
if (message && message.input) {
if (!request.content.allow_stdin) {
log("REQUEST: STDIN: Frontend does not support stdin requests");
onReply(new Error("Frontend does not support stdin requests"));
return;
}
var response = request.respond(
this.stdinSocket, "input_request", message.input
);
log("REQUEST: STDIN:", response);
this.onReplies[response.header.msg_id] = onReply;
this.lastActiveOnReply = onReply;
}
}
}
/**
* Handler for `complete_request` messages
*
* @param {module:jmp~Message} request Request message
* @this Kernel
*/
function complete_request(request) {
this.session.complete(request.content.line, request.content.cursor_pos, {
beforeRun: beforeRun.bind(this),
onSuccess: onSuccess.bind(this),
onError: onError.bind(this),
afterRun: afterRun.bind(this),
});
return;
function beforeRun() {
status_busy.call(this, request);
}
function afterRun() {
status_idle.call(this, request);
}
function onSuccess(result) {
var content = {
"matches": result.completion.list,
"matched_text": result.completion.matchedText,
"status": "ok",
};
request.respond(this.shellSocket, "complete_reply", content);
}
function onError(result) {
var content = {
"matches": [],
"matched_text": request.content.text,
"status": "ok",
};
request.respond(this.shellSocket, "complete_reply", content);
}
}
/**
* Handler for `history_request` messages
*
* @param {module:jmp~Message} request Request message
* @this Kernel
*/
function history_request(request) {
status_busy.call(this, request);
request.respond(
this.shellSocket,
"history_reply", {
"history": [] // TODO
}, {},
this.protocolVersion
);
status_idle.call(this, request);
}
/**
* Handler for `object_info_request` messages
*
* @param {module:jmp~Message} request Request message
* @this Kernel
*/
function object_info_request(request) {
this.session.inspect(request.content.oname, request.content.oname.length, {
beforeRun: beforeRun.bind(this),
onSuccess: onSuccess.bind(this),
onError: onError.bind(this),
afterRun: afterRun.bind(this),
});
return;
function beforeRun() {
status_busy.call(this, request);
}
function afterRun() {
status_idle.call(this, request);
}
function onSuccess(result) {
var content = {
oname: request.content.oname,
found: true,
ismagic: false,
isalias: false,
};
if (result.inspection) {
content.string_name = result.inspection.string;
if (result.inspection.list) {
if (result.inspection.list.length >= 1) {
content.type_name = result.inspection.list[0];
} else {
content.type_name = result.inspection.type;
}
if (result.inspection.list.length >= 2) {
content.base_name = result.inspection.list[1];
}
}
if (result.inspection.length) {
content.length = result.inspection.length;
}
content.docstring = (
result.inspection.type + ": " + result.inspection.string
);
}
if (result.doc) {
content.namespace = "builtin";
content.docstring = result.doc.description;
if (result.doc.usage) {
content.definition = result.doc.usage;
}
}
request.respond(this.shellSocket, "object_info_reply", content);
}
function onError(result) {
var content = {
oname: request.content.oname,
found: false,
};
request.respond(this.shellSocket, "object_info_reply", content);
}
}
/**
* Handler for `shutdown_request` messages
*
* @param {module:jmp~Message} request Request message
* @this Kernel
*/
function shutdown_request(request) {
status_busy.call(this, request);
function respond(code, signal) {
request.respond(
this.controlSocket, "shutdown_reply", request.content
);
}
if (request.content.restart) {
this.restart(respond.bind(this));
} else {
this.destroy(respond.bind(this));
}
status_idle.call(this, request);
}