Node js - Synchronous execution of Websocket's object functions
I have the following like functionality
//Have to connect to a websocket
var websocket = new WebSocket(wsUri);
var channel = new WebChannel(websocket);
The webchannel returns an object that has list of functions
//The following functions
actualTest1Value = 1;
actualTest2Value = 2;
objectReturned = channel.object.objectReturned
test1= objectReturned.getValueFor("Sample");
test2 = objectReturned.getValueFor("Sample1");
if(test1 === actualTest1Value && test2 === actualTest2Value)
{
//do some Operation
}
The problem here is, the test1 and test 2 is undefined because of the asynchronous nature of node js. As the object is returned from a server, I cannot add a promise to the functions of the object. Is there any way to execute this synchronously?
javascript node.js server-side-scripting
asked Nov 23 '18 at 12:55
venkatvenkat
1689
add a comment |
I have the following like functionality
//Have to connect to a websocket
var websocket = new WebSocket(wsUri);
var channel = new WebChannel(websocket);
The webchannel returns an object that has list of functions
//The following functions
actualTest1Value = 1;
actualTest2Value = 2;
objectReturned = channel.object.objectReturned
test1= objectReturned.getValueFor("Sample");
test2 = objectReturned.getValueFor("Sample1");
if(test1 === actualTest1Value && test2 === actualTest2Value)
{
//do some Operation
}
The problem here is, the test1 and test 2 is undefined because of the asynchronous nature of node js. As the object is returned from a server, I cannot add a promise to the functions of the object. Is there any way to execute this synchronously?
javascript node.js server-side-scripting
asked Nov 23 '18 at 12:55
venkatvenkat
1689
2
No there is not. Sry.
– mtkopone
Nov 23 '18 at 12:59
Is there a way to atleast wait untill the execution returns a value?
– venkat
Nov 23 '18 at 13:06
Still struggling here
– venkat
Nov 23 '18 at 16:04
add a comment |
I have the following like functionality
//Have to connect to a websocket
var websocket = new WebSocket(wsUri);
var channel = new WebChannel(websocket);
The webchannel returns an object that has list of functions
//The following functions
actualTest1Value = 1;
actualTest2Value = 2;
objectReturned = channel.object.objectReturned
test1= objectReturned.getValueFor("Sample");
test2 = objectReturned.getValueFor("Sample1");
if(test1 === actualTest1Value && test2 === actualTest2Value)
{
//do some Operation
}
The problem here is, the test1 and test 2 is undefined because of the asynchronous nature of node js. As the object is returned from a server, I cannot add a promise to the functions of the object. Is there any way to execute this synchronously?
javascript node.js server-side-scripting
asked Nov 23 '18 at 12:55
venkatvenkat
1689
I have the following like functionality
//Have to connect to a websocket
var websocket = new WebSocket(wsUri);
var channel = new WebChannel(websocket);
The webchannel returns an object that has list of functions
//The following functions
actualTest1Value = 1;
actualTest2Value = 2;
objectReturned = channel.object.objectReturned
test1= objectReturned.getValueFor("Sample");
test2 = objectReturned.getValueFor("Sample1");
if(test1 === actualTest1Value && test2 === actualTest2Value)
{
//do some Operation
}
The problem here is, the test1 and test 2 is undefined because of the asynchronous nature of node js. As the object is returned from a server, I cannot add a promise to the functions of the object. Is there any way to execute this synchronously?
javascript node.js server-side-scripting
javascript node.js server-side-scripting
asked Nov 23 '18 at 12:55
venkatvenkat
1689
asked Nov 23 '18 at 12:55
venkatvenkat
1689
asked Nov 23 '18 at 12:55
venkatvenkat
1689
asked Nov 23 '18 at 12:55
venkatvenkat
1689
asked Nov 23 '18 at 12:55
venkatvenkat
1689
1689
2
No there is not. Sry.
– mtkopone
Nov 23 '18 at 12:59
Is there a way to atleast wait untill the execution returns a value?
– venkat
Nov 23 '18 at 13:06
Still struggling here
– venkat
Nov 23 '18 at 16:04
add a comment |
2
No there is not. Sry.
– mtkopone
Nov 23 '18 at 12:59
Is there a way to atleast wait untill the execution returns a value?
– venkat
Nov 23 '18 at 13:06
Still struggling here
– venkat
Nov 23 '18 at 16:04
2
2
No there is not. Sry.
– mtkopone
Nov 23 '18 at 12:59
No there is not. Sry.
– mtkopone
Nov 23 '18 at 12:59
Is there a way to atleast wait untill the execution returns a value?
– venkat
Nov 23 '18 at 13:06
Is there a way to atleast wait untill the execution returns a value?
– venkat
Nov 23 '18 at 13:06
Still struggling here
– venkat
Nov 23 '18 at 16:04
Still struggling here
– venkat
Nov 23 '18 at 16:04
add a comment |
1 Answer
1
active
oldest
votes
I did a small workaround to execute one after the other.
test1 = objectReturned.getValueFor("Sample", function(returnVal){
test1 = returnVal;
compare();
});
test2 = objectReturned.getValueFor("Sample1", function(returnVal){
test2 = returnVal;
compare();
});
After this wrap the comparison in a separate function
function compare()
{
//before doing this check test2 is not undefined, because both values will be
//defined on second callback.
if(test1 === actualTest1Value && test2 === actualTest2Value)
{
//do some Operation
}
}
I was lucky to have test1 and test2 as global variables and calling the function compare() on the callback of each functions and comparing both values only when the callback comes from second one helped me.
answered Nov 24 '18 at 7:05
venkatvenkat
1689
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I did a small workaround to execute one after the other.
test1 = objectReturned.getValueFor("Sample", function(returnVal){
test1 = returnVal;
compare();
});
test2 = objectReturned.getValueFor("Sample1", function(returnVal){
test2 = returnVal;
compare();
});
After this wrap the comparison in a separate function
function compare()
{
//before doing this check test2 is not undefined, because both values will be
//defined on second callback.
if(test1 === actualTest1Value && test2 === actualTest2Value)
{
//do some Operation
}
}
I was lucky to have test1 and test2 as global variables and calling the function compare() on the callback of each functions and comparing both values only when the callback comes from second one helped me.
answered Nov 24 '18 at 7:05
venkatvenkat
1689
add a comment |
I did a small workaround to execute one after the other.
test1 = objectReturned.getValueFor("Sample", function(returnVal){
test1 = returnVal;
compare();
});
test2 = objectReturned.getValueFor("Sample1", function(returnVal){
test2 = returnVal;
compare();
});
After this wrap the comparison in a separate function
function compare()
{
//before doing this check test2 is not undefined, because both values will be
//defined on second callback.
if(test1 === actualTest1Value && test2 === actualTest2Value)
{
//do some Operation
}
}
I was lucky to have test1 and test2 as global variables and calling the function compare() on the callback of each functions and comparing both values only when the callback comes from second one helped me.
answered Nov 24 '18 at 7:05
venkatvenkat
1689
add a comment |
I did a small workaround to execute one after the other.
test1 = objectReturned.getValueFor("Sample", function(returnVal){
test1 = returnVal;
compare();
});
test2 = objectReturned.getValueFor("Sample1", function(returnVal){
test2 = returnVal;
compare();
});
After this wrap the comparison in a separate function
function compare()
{
//before doing this check test2 is not undefined, because both values will be
//defined on second callback.
if(test1 === actualTest1Value && test2 === actualTest2Value)
{
//do some Operation
}
}
I was lucky to have test1 and test2 as global variables and calling the function compare() on the callback of each functions and comparing both values only when the callback comes from second one helped me.
answered Nov 24 '18 at 7:05
venkatvenkat
1689
I did a small workaround to execute one after the other.
test1 = objectReturned.getValueFor("Sample", function(returnVal){
test1 = returnVal;
compare();
});
test2 = objectReturned.getValueFor("Sample1", function(returnVal){
test2 = returnVal;
compare();
});
After this wrap the comparison in a separate function
function compare()
{
//before doing this check test2 is not undefined, because both values will be
//defined on second callback.
if(test1 === actualTest1Value && test2 === actualTest2Value)
{
//do some Operation
}
}
I was lucky to have test1 and test2 as global variables and calling the function compare() on the callback of each functions and comparing both values only when the callback comes from second one helped me.
answered Nov 24 '18 at 7:05
venkatvenkat
1689
edited Nov 24 '18 at 7:11
answered Nov 24 '18 at 7:05
venkatvenkat
1689
answered Nov 24 '18 at 7:05
venkatvenkat
1689
answered Nov 24 '18 at 7:05
venkatvenkat
1689
1689
add a comment |
add a comment |
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2
No there is not. Sry.
– mtkopone
Nov 23 '18 at 12:59
Is there a way to atleast wait untill the execution returns a value?
– venkat
Nov 23 '18 at 13:06
Still struggling here
– venkat
Nov 23 '18 at 16:04