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https://issues.apache.org/jira/browse/IGNITE-15572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Pereslegin reassigned IGNITE-15572:
-----------------------------------------
Assignee: Pavel Pereslegin
> Ability to set custom execution context for Ignite service.
> -----------------------------------------------------------
>
> Key: IGNITE-15572
> URL: https://issues.apache.org/jira/browse/IGNITE-15572
> Project: Ignite
> Issue Type: New Feature
> Reporter: Pavel Pereslegin
> Assignee: Pavel Pereslegin
> Priority: Major
>
> In traditional microservices, we have the ability to set a custom execution
> context.
> For example, a REST service can read the session ID from a request. We can
> say that each client request, in this case, has a set of explicit and
> implicit parameters. One of the implicit parameters is a session identifier
> that can be passed to the service using request headers.
> It would be nice to have a similar feature in Ignite services.
> The basic idea behind the implementation:
> 1. Allow the user to bind the "execution context" to the client proxy object.
> 2. Pass an additional implicit parameter each time the user service method is
> called.
> Sample code for specifying "headers".
> {code:java}
> // Creating "request headers".
> Map<String, Object> headers = Collections.singletonMap("user.id", 1);
> // Binding "request headers" to proxy invocation handler.
> IMyService svcProxy = ignite.services().serviceProxy("service1",
> IMyService.class, false, headers);
> // Service method invocation using this proxy.
> handle(svcProxy.multiply(2, 2));
> handle(svcProxy.multiply(3, 3));
> handle(svcProxy.multiply(4, 4));
> ...
> {code}
> Sample code for reading "headers".
> {code:java}
> class MyServiceImpl implements IMyService {
> @LoggerResource
> private IgniteLogger log;
> private ServiceContext ctx;
> @Override public void init(ServiceContext ctx) {
> this.ctx = ctx;
> }
> @Override public int multiply(int a, int b) {
> log.info(String.format("user=%d, oper=%s, a=%d, b=%d",
> ctx.getHeaders().get("user.id"), "multiply", a, b));
> return a * b;
> }
> ...
> }
> {code}
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