Ballerina (programming language): Difference between revisions

Revision as of 04:13, 1 March 2022

Revision as of 04:30, 1 March 2022

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=== Workers ===

<syntaxhighlight>

{{pre|1=

import ballerina/http;

import ballerina/lang.'int;

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// to avoid deadlocks.

public function main() {

@strand {thread: "any"}

worker w1 {

int w1val = checkpanic calculate("2*3");

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// A worker can have an explicit return type, or else, if a return type is not mentioned,

// it is equivalent to returning ().

@strand {thread: "any"}

worker w2 {

int w2val = checkpanic calculate("17*5");

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function calculate(string expr) returns int|error {

http:Client httpClient = check new ("https://api.mathjs.org");

varstring response = check httpClient->get(string `/v4/?expr=${expr}`);

return check 'int:fromString(check <@untainted> response.getTextPayload());

}

</syntaxhighlight>

}}<ref name="example2">{{cite web |url=https://github.com/ballerina-platform/ballerina-distribution/blob/master/examples/worker-interaction/worker_interaction.bal |title= Worker interaction |author=Ballerina Team|date=16 September 2020 |publisher=ballerina.io}}</ref>

=== gRPC Unary Blocking ===