Update the alternative receiver code

examples/alternate-receive/alternate_receive.bal

@@ -1,46 +1,57 @@
+import ballerina/http;
 import ballerina/io;
 import ballerina/lang.runtime;
 
 public function main() {
     worker w1 {
-        2 -> w3;
+        fetch("https://postman-echo.com/get?worker=w1") -> w3;
     }
 
     worker w2 {
-        runtime:sleep(2);
-        3 -> w3;
+        runtime:sleep(3);
+        fetch("https://postman-echo.com/get?worker=w2") -> w3;
     }
 
-    worker w3 returns int {
-        // The value of the variable `result` is set as soon as the values from either
+    worker w3 returns json|error? {
+        // The value of the variable `result` is set as soon as the value from either
         // worker `w1` or `w2` is received.
-        int result = <- w1 | w2;
-        return result;
+        json|error result = <- w1 | w2;
+        return getJsonProperty(result);
     }
 
     worker w4 returns error? {
-        int value = 10;
-        if value == 10 {
-            return error("Error in worker 4");
-        }
-        value -> w6;
+        // invalid url
+        fetch("https://postman-echo.com/ge?worker=w4") -> w6;
     }
 
-    worker w5 {
+    worker w5 returns error? {
         runtime:sleep(2);
-        3 -> w6;
+        fetch("https://postman-echo.com/get?worker=w5") -> w6;
     }
 
-    worker w6 returns int|error? {
+    worker w6 returns json|error? {
         // Alternate receive action waits until a message that is not an error is received. 
-        // Since `w4` returns an error, it waits further and sets the value that is received from `w5`.
-        int a = check <- w4 | w5;
-        return a;
+        // Since `w3` returns an error, it waits further and sets the value that is received from `w4`.
+        json|error result = <- w4 | w5;
+        return getJsonProperty(result);
     }
 
-    int w3Result = wait w3;
+    json|error? w3Result = wait w3;
     io:println(w3Result);
 
-    int|error? w6Result = wait w6;
+    json|error? w6Result = wait w6;
     io:println(w6Result);
 }
+
+function fetch(string url) returns json|error {
+    http:Client client = check new (url);
+    map<json> payload = check client->get("");
+    return payload["args"];
+}
+
+function getJsonProperty(json|error data) returns json|error? {
+    if data is error {
+        return data.message();
+    }
+    return data.'worker;
+}

examples/alternate-receive/alternate_receive.md

@@ -1,6 +1,6 @@
 # Alternate receive
 
-The alternate receive action can be used to receive values from multiple send actions. It operates by waiting until it encounters a non-error message, a panic termination status on a closed channel, or the closure of all channels. Alternate receive action sets the first non-error value it encounters as the outcome.
+The alternate receive action can be used to receive one of multiple values corresponding to multiple send actions. It operates by waiting until it encounters a non-error message, a panic termination status on a closed channel, or the closure of all channels. Alternate receive action sets the first non-error value it encounters as the result.
 
 ::: code alternate_receive.bal :::
 

examples/alternate-receive/alternate_receive.out

@@ -1,3 +1,3 @@
 $ bal run alternate_receive.bal
-2
-3
+w1
+w5