Connection Pool Use Skips Function Body
I am a complete Node noob and I am struggling to understand why, when this function is called, the entire execution of the method is skipped. If I follow along in the debugger, I literally see execution go from the first line (the function declaration) to the last line, without hitting anything in between.
Thank you very much! Honestly, I'm really struggling to understand the async/await nature of Node code, so if you also have any good resources on working through that, I would greatly appreciate it.
var mysql = require('mysql');
var connPool = mysql.createPool({
host: "secret",
user: "secret",
password: "secret"
});
...
There is code executing here that eventually calls the function below
...
function getOrgAndAgentId(emailAddress){
connPool.getConnection(function(err, conn){
if(err){
console.log(err);
return;
}
var sql = getAgentIdAndOrgIdSql(emailAddress);
conn.query(sql, , function(err, result){
conn.release();
if(err){
console.log("TPM Query Error: " + err)
return;
}
var ret = {
agentId: result.row[0][agentIdAndOrgIdEnum.agentId],
orgId: result.row[0][agentIdAndOrgIdEnum.orgId]
}
return ret;
});
});
}
mysql node.js
asked Nov 28 '18 at 22:18
jhammondjhammond
6931821
add a comment |
I am a complete Node noob and I am struggling to understand why, when this function is called, the entire execution of the method is skipped. If I follow along in the debugger, I literally see execution go from the first line (the function declaration) to the last line, without hitting anything in between.
Thank you very much! Honestly, I'm really struggling to understand the async/await nature of Node code, so if you also have any good resources on working through that, I would greatly appreciate it.
var mysql = require('mysql');
var connPool = mysql.createPool({
host: "secret",
user: "secret",
password: "secret"
});
...
There is code executing here that eventually calls the function below
...
function getOrgAndAgentId(emailAddress){
connPool.getConnection(function(err, conn){
if(err){
console.log(err);
return;
}
var sql = getAgentIdAndOrgIdSql(emailAddress);
conn.query(sql, , function(err, result){
conn.release();
if(err){
console.log("TPM Query Error: " + err)
return;
}
var ret = {
agentId: result.row[0][agentIdAndOrgIdEnum.agentId],
orgId: result.row[0][agentIdAndOrgIdEnum.orgId]
}
return ret;
});
});
}
mysql node.js
asked Nov 28 '18 at 22:18
jhammondjhammond
6931821
It's not skipped; it's just an asynchronous function call, so your surrounding logic proceeds without waiting for it to complete. See also: stackoverflow.com/a/14220323/2301088
– Connor
Nov 29 '18 at 18:25
add a comment |
I am a complete Node noob and I am struggling to understand why, when this function is called, the entire execution of the method is skipped. If I follow along in the debugger, I literally see execution go from the first line (the function declaration) to the last line, without hitting anything in between.
Thank you very much! Honestly, I'm really struggling to understand the async/await nature of Node code, so if you also have any good resources on working through that, I would greatly appreciate it.
var mysql = require('mysql');
var connPool = mysql.createPool({
host: "secret",
user: "secret",
password: "secret"
});
...
There is code executing here that eventually calls the function below
...
function getOrgAndAgentId(emailAddress){
connPool.getConnection(function(err, conn){
if(err){
console.log(err);
return;
}
var sql = getAgentIdAndOrgIdSql(emailAddress);
conn.query(sql, , function(err, result){
conn.release();
if(err){
console.log("TPM Query Error: " + err)
return;
}
var ret = {
agentId: result.row[0][agentIdAndOrgIdEnum.agentId],
orgId: result.row[0][agentIdAndOrgIdEnum.orgId]
}
return ret;
});
});
}
mysql node.js
asked Nov 28 '18 at 22:18
jhammondjhammond
6931821
I am a complete Node noob and I am struggling to understand why, when this function is called, the entire execution of the method is skipped. If I follow along in the debugger, I literally see execution go from the first line (the function declaration) to the last line, without hitting anything in between.
Thank you very much! Honestly, I'm really struggling to understand the async/await nature of Node code, so if you also have any good resources on working through that, I would greatly appreciate it.
var mysql = require('mysql');
var connPool = mysql.createPool({
host: "secret",
user: "secret",
password: "secret"
});
...
There is code executing here that eventually calls the function below
...
function getOrgAndAgentId(emailAddress){
connPool.getConnection(function(err, conn){
if(err){
console.log(err);
return;
}
var sql = getAgentIdAndOrgIdSql(emailAddress);
conn.query(sql, , function(err, result){
conn.release();
if(err){
console.log("TPM Query Error: " + err)
return;
}
var ret = {
agentId: result.row[0][agentIdAndOrgIdEnum.agentId],
orgId: result.row[0][agentIdAndOrgIdEnum.orgId]
}
return ret;
});
});
}
mysql node.js
mysql node.js
asked Nov 28 '18 at 22:18
jhammondjhammond
6931821
asked Nov 28 '18 at 22:18
jhammondjhammond
6931821
asked Nov 28 '18 at 22:18
jhammondjhammond
6931821
asked Nov 28 '18 at 22:18
jhammondjhammond
6931821
asked Nov 28 '18 at 22:18
jhammondjhammond
6931821
6931821
It's not skipped; it's just an asynchronous function call, so your surrounding logic proceeds without waiting for it to complete. See also: stackoverflow.com/a/14220323/2301088
– Connor
Nov 29 '18 at 18:25
add a comment |
It's not skipped; it's just an asynchronous function call, so your surrounding logic proceeds without waiting for it to complete. See also: stackoverflow.com/a/14220323/2301088
– Connor
Nov 29 '18 at 18:25
It's not skipped; it's just an asynchronous function call, so your surrounding logic proceeds without waiting for it to complete. See also: stackoverflow.com/a/14220323/2301088
– Connor
Nov 29 '18 at 18:25
It's not skipped; it's just an asynchronous function call, so your surrounding logic proceeds without waiting for it to complete. See also: stackoverflow.com/a/14220323/2301088
– Connor
Nov 29 '18 at 18:25
add a comment |
0
active
oldest
votes
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53528953%2fconnection-pool-use-skips-function-body%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53528953%2fconnection-pool-use-skips-function-body%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
It's not skipped; it's just an asynchronous function call, so your surrounding logic proceeds without waiting for it to complete. See also: stackoverflow.com/a/14220323/2301088
– Connor
Nov 29 '18 at 18:25